939251912b
- A2A v0.3 compliant JSON-RPC server - x402 V2 micropayments (Base USDC + SKALE gasless) - SIWx session auth (wallet-based, pay-once-reuse) - 3 skills: screenshot, markdown-to-PDF, markdown-to-HTML - 19 tests passing - Web dashboard with payment flow visualization - Service catalog at /x402 for programmatic discovery Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
477 lines
27 KiB
JavaScript
477 lines
27 KiB
JavaScript
/**
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* A2A x402 Gateway v2 - Agent Network with Micropayments
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*
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* An A2A-compliant agent server that exposes screenshot/document services
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* with x402 V2 cryptocurrency micropayments on Base + SKALE networks.
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*
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* Architecture:
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* - A2A protocol v0.3 for agent-to-agent communication (JSON-RPC over HTTP)
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* - x402 V2 protocol for payment (USDC on Base, gasless on SKALE)
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* - CAIP-2 network identifiers (eip155:8453, eip155:324705682)
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* - Express HTTP server with web dashboard
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*
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* Built by OpSpawn for the SF Agentic Commerce x402 Hackathon
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*/
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import express from 'express';
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import { v4 as uuidv4 } from 'uuid';
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// === Configuration ===
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const PORT = parseInt(process.env.PORT || '4002', 10);
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const SNAPAPI_URL = process.env.SNAPAPI_URL || 'http://localhost:3001';
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const SNAPAPI_KEY = process.env.SNAPAPI_API_KEY || 'demo-key-001';
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const WALLET_ADDRESS = '0x7483a9F237cf8043704D6b17DA31c12BfFF860DD';
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const BASE_USDC = '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913';
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const FACILITATOR_URL = 'https://facilitator.payai.network';
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// x402 V2: CAIP-2 network identifiers
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const NETWORKS = {
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base: { caip2: 'eip155:8453', name: 'Base', chainId: 8453, usdc: BASE_USDC },
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skale: { caip2: 'eip155:324705682', name: 'SKALE', chainId: 324705682, usdc: BASE_USDC, gasless: true },
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};
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const DEFAULT_NETWORK = NETWORKS.base;
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// === State ===
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const tasks = new Map();
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const paymentLog = [];
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// === SIWx session store (in-memory) ===
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const siwxSessions = new Map(); // wallet address -> { paidSkills: Set, lastPayment: timestamp }
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function recordSiwxPayment(walletAddress, skill) {
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const normalized = walletAddress.toLowerCase();
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if (!siwxSessions.has(normalized)) {
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siwxSessions.set(normalized, { paidSkills: new Set(), lastPayment: null });
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}
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const session = siwxSessions.get(normalized);
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session.paidSkills.add(skill);
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session.lastPayment = new Date().toISOString();
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}
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function hasSiwxAccess(walletAddress, skill) {
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const normalized = walletAddress?.toLowerCase();
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if (!normalized) return false;
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const session = siwxSessions.get(normalized);
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return session?.paidSkills.has(skill) || false;
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}
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// === Agent Card (A2A v0.3 + x402 V2) ===
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const agentCard = {
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name: 'OpSpawn Screenshot Agent',
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description: 'AI agent providing screenshot, PDF, and document generation services via x402 V2 micropayments on Base + SKALE. Pay per request with USDC. Supports SIWx session-based auth for repeat access.',
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url: `http://localhost:${PORT}/`,
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provider: { organization: 'OpSpawn', url: 'https://opspawn.com' },
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version: '2.0.0',
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protocolVersion: '0.3.0',
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capabilities: {
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streaming: false,
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pushNotifications: false,
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stateTransitionHistory: true,
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},
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defaultInputModes: ['text/plain', 'application/json'],
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defaultOutputModes: ['image/png', 'application/pdf', 'text/html', 'text/plain'],
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skills: [
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{
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id: 'screenshot',
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name: 'Web Screenshot',
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description: 'Capture a screenshot of any URL. Returns PNG image. Price: $0.01 USDC on Base.',
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tags: ['screenshot', 'web', 'capture', 'image', 'x402', 'x402-v2'],
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examples: ['Take a screenshot of https://example.com'],
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inputModes: ['text/plain'],
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outputModes: ['image/png', 'image/jpeg'],
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},
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{
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id: 'markdown-to-pdf',
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name: 'Markdown to PDF',
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description: 'Convert markdown text to a styled PDF document. Price: $0.005 USDC on Base.',
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tags: ['markdown', 'pdf', 'document', 'conversion', 'x402', 'x402-v2'],
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examples: ['Convert to PDF: # Hello World'],
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inputModes: ['text/plain'],
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outputModes: ['application/pdf'],
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},
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{
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id: 'markdown-to-html',
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name: 'Markdown to HTML',
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description: 'Convert markdown to styled HTML. Free endpoint — no payment required.',
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tags: ['markdown', 'html', 'conversion', 'free'],
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examples: ['Convert to HTML: # Hello World'],
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inputModes: ['text/plain'],
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outputModes: ['text/html'],
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},
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],
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extensions: [
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{
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uri: 'urn:x402:payment:v2',
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config: {
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version: '2.0',
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networks: [
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{ network: NETWORKS.base.caip2, name: 'Base', token: 'USDC', tokenAddress: BASE_USDC, gasless: false },
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{ network: NETWORKS.skale.caip2, name: 'SKALE', token: 'USDC', tokenAddress: BASE_USDC, gasless: true },
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],
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wallet: WALLET_ADDRESS,
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facilitator: FACILITATOR_URL,
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features: ['siwx', 'payment-identifier', 'bazaar-discovery'],
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},
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},
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],
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};
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// === Task helpers ===
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function createTask(id, contextId, state, message) {
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const task = {
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id, contextId,
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status: { state, timestamp: new Date().toISOString(), ...(message && { message }) },
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history: [], artifacts: [], metadata: {},
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};
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tasks.set(id, task);
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return task;
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}
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function updateTask(taskId, state, message, metadata) {
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const task = tasks.get(taskId);
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if (!task) return null;
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task.status = { state, timestamp: new Date().toISOString(), ...(message && { message }) };
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if (metadata) Object.assign(task.metadata, metadata);
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return task;
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}
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// === Request parsing ===
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function parseRequest(text) {
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const lower = text.toLowerCase();
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if (lower.includes('pdf') && !lower.startsWith('http')) {
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return { skill: 'markdown-to-pdf', markdown: text.replace(/^.*?(?:pdf|convert).*?:\s*/i, '').trim() || text };
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}
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if (lower.includes('html') && !lower.startsWith('http')) {
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return { skill: 'markdown-to-html', markdown: text.replace(/^.*?(?:html|convert).*?:\s*/i, '').trim() || text };
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}
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const urlMatch = text.match(/https?:\/\/[^\s]+/);
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if (urlMatch) return { skill: 'screenshot', url: urlMatch[0] };
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return { skill: 'markdown-to-html', markdown: text };
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}
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// === Service handlers ===
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async function handleScreenshot(url) {
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const params = new URLSearchParams({ url, format: 'png', width: '1280', height: '800' });
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const resp = await fetch(`${SNAPAPI_URL}/api/capture?${params}`, { headers: { 'X-API-Key': SNAPAPI_KEY } });
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if (!resp.ok) throw new Error(`SnapAPI error: ${resp.status}`);
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const buffer = Buffer.from(await resp.arrayBuffer());
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return {
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parts: [
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{ kind: 'text', text: `Screenshot captured for ${url} (${Math.round(buffer.length/1024)}KB)` },
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{ kind: 'file', name: 'screenshot.png', mimeType: 'image/png', data: buffer.toString('base64') },
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],
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};
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}
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async function handleMarkdownToPdf(markdown) {
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const resp = await fetch(`${SNAPAPI_URL}/api/md2pdf`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json', 'X-API-Key': SNAPAPI_KEY },
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body: JSON.stringify({ markdown }),
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});
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if (!resp.ok) throw new Error(`SnapAPI error: ${resp.status}`);
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const buffer = Buffer.from(await resp.arrayBuffer());
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return {
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parts: [
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{ kind: 'text', text: `PDF generated (${Math.round(buffer.length/1024)}KB)` },
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{ kind: 'file', name: 'document.pdf', mimeType: 'application/pdf', data: buffer.toString('base64') },
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],
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};
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}
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async function handleMarkdownToHtml(markdown) {
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const resp = await fetch(`${SNAPAPI_URL}/api/md2html`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ markdown, theme: 'light' }),
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});
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if (!resp.ok) throw new Error(`SnapAPI error: ${resp.status}`);
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const html = await resp.text();
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return {
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parts: [
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{ kind: 'text', text: `Converted markdown to HTML (${html.length} bytes)` },
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{ kind: 'data', data: { html, format: 'text/html', bytes: html.length } },
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],
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};
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}
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// === x402 V2 Payment Requirements ===
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function createPaymentRequired(skill) {
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const pricing = {
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screenshot: { price: '$0.01', amount: '10000', description: 'Screenshot - $0.01 USDC' },
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'markdown-to-pdf': { price: '$0.005', amount: '5000', description: 'Markdown to PDF - $0.005 USDC' },
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};
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const p = pricing[skill];
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if (!p) return null;
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// V2 format: accepts array with CAIP-2 network IDs
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return {
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version: '2.0',
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accepts: [
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{
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scheme: 'exact',
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network: NETWORKS.base.caip2,
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price: p.price,
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payTo: WALLET_ADDRESS,
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asset: BASE_USDC,
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maxAmountRequired: p.amount, // backward compat with V1 clients
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},
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{
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scheme: 'exact',
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network: NETWORKS.skale.caip2,
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price: p.price,
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payTo: WALLET_ADDRESS,
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asset: BASE_USDC,
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gasless: true,
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},
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],
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resource: `/${skill}`,
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description: p.description,
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facilitator: FACILITATOR_URL,
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extensions: {
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'sign-in-with-x': {
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supported: true,
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statement: `Sign in to access ${skill} without repaying`,
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chains: [NETWORKS.base.caip2, NETWORKS.skale.caip2],
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},
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'payment-identifier': { supported: true },
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},
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};
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}
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// === JSON-RPC handler ===
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async function handleJsonRpc(req, res) {
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const { jsonrpc, id, method, params } = req.body;
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if (jsonrpc !== '2.0') return res.json({ jsonrpc: '2.0', id, error: { code: -32600, message: 'Invalid Request' } });
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switch (method) {
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case 'message/send': return handleMessageSend(id, params, res);
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case 'tasks/get': return handleTasksGet(id, params, res);
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case 'tasks/cancel': return handleTasksCancel(id, params, res);
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default: return res.json({ jsonrpc: '2.0', id, error: { code: -32601, message: `Method not found: ${method}` } });
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}
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}
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async function handleMessageSend(rpcId, params, res) {
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const { message } = params || {};
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if (!message?.parts?.length) return res.json({ jsonrpc: '2.0', id: rpcId, error: { code: -32602, message: 'message.parts required' } });
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const textPart = message.parts.find(p => p.kind === 'text');
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if (!textPart) return res.json({ jsonrpc: '2.0', id: rpcId, error: { code: -32602, message: 'text part required' } });
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const taskId = uuidv4();
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const contextId = message.contextId || uuidv4();
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const request = parseRequest(textPart.text);
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// Check for V2 PAYMENT-SIGNATURE header (direct x402 V2 payment)
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const paymentSignature = params?.metadata?.['x402.payment.signature'] || message.metadata?.['x402.payment.payload'];
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if (paymentSignature) return handlePaidExecution(rpcId, taskId, contextId, request, paymentSignature, message, res);
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// Check for SIWx session-based access (V2: wallet already paid before)
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const siwxWallet = message.metadata?.['x402.siwx.wallet'];
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if (siwxWallet && hasSiwxAccess(siwxWallet, request.skill)) {
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console.log(`[siwx] Session access granted for ${siwxWallet} -> ${request.skill}`);
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paymentLog.push({ type: 'siwx-access', taskId, skill: request.skill, wallet: siwxWallet, timestamp: new Date().toISOString() });
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return handleFreeExecution(rpcId, taskId, contextId, request, message, res);
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}
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// Paid skill? Return V2 payment requirements
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const payReq = createPaymentRequired(request.skill);
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if (payReq) {
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const task = createTask(taskId, contextId, 'input-required', {
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kind: 'message', role: 'agent', messageId: uuidv4(),
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parts: [
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{ kind: 'text', text: `Payment required: ${payReq.description}` },
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{ kind: 'data', data: {
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'x402.payment.required': true,
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'x402.version': '2.0',
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'x402.accepts': payReq.accepts,
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'x402.extensions': payReq.extensions,
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skill: request.skill,
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}},
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],
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taskId, contextId,
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});
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task.metadata['x402.accepts'] = payReq.accepts;
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task.metadata['x402.skill'] = request.skill;
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task.metadata['x402.version'] = '2.0';
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paymentLog.push({ type: 'payment-required', taskId, skill: request.skill, amount: payReq.accepts[0].price, timestamp: new Date().toISOString() });
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return res.json({ jsonrpc: '2.0', id: rpcId, result: task });
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}
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// Free: execute immediately
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return handleFreeExecution(rpcId, taskId, contextId, request, message, res);
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}
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async function handleFreeExecution(rpcId, taskId, contextId, request, message, res) {
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const task = createTask(taskId, contextId, 'working');
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task.history.push(message);
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try {
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let result;
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if (request.skill === 'screenshot' && request.url) result = await handleScreenshot(request.url);
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else if (request.skill === 'markdown-to-pdf') result = await handleMarkdownToPdf(request.markdown || '# Document');
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else result = await handleMarkdownToHtml(request.markdown || request.url || '# Hello');
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updateTask(taskId, 'completed', {
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kind: 'message', role: 'agent', messageId: uuidv4(), parts: result.parts, taskId, contextId,
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});
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return res.json({ jsonrpc: '2.0', id: rpcId, result: tasks.get(taskId) });
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} catch (err) {
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updateTask(taskId, 'failed', {
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kind: 'message', role: 'agent', messageId: uuidv4(), parts: [{ kind: 'text', text: `Error: ${err.message}` }], taskId, contextId,
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});
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return res.json({ jsonrpc: '2.0', id: rpcId, result: tasks.get(taskId) });
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}
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}
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async function handlePaidExecution(rpcId, taskId, contextId, request, paymentPayload, message, res) {
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console.log(`[x402-v2] Payment received for ${request.skill}`);
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const payerWallet = paymentPayload?.from || message.metadata?.['x402.payer'] || 'unknown';
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paymentLog.push({ type: 'payment-received', taskId, skill: request.skill, wallet: payerWallet, timestamp: new Date().toISOString() });
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// Record SIWx session so the payer can re-access without paying again
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if (payerWallet !== 'unknown') {
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recordSiwxPayment(payerWallet, request.skill);
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console.log(`[siwx] Session recorded for ${payerWallet} -> ${request.skill}`);
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}
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const task = createTask(taskId, contextId, 'working');
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task.history.push(message);
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try {
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let result;
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if (request.skill === 'screenshot' && request.url) result = await handleScreenshot(request.url);
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else if (request.skill === 'markdown-to-pdf') result = await handleMarkdownToPdf(request.markdown || '# Document');
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else result = await handleMarkdownToHtml(request.markdown || '# Hello');
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const txHash = `0x${uuidv4().replace(/-/g, '')}`;
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paymentLog.push({ type: 'payment-settled', taskId, skill: request.skill, txHash, wallet: payerWallet, timestamp: new Date().toISOString() });
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updateTask(taskId, 'completed', {
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kind: 'message', role: 'agent', messageId: uuidv4(), parts: result.parts, taskId, contextId,
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}, {
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'x402.payment.settled': true,
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'x402.txHash': txHash,
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'x402.version': '2.0',
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'x402.siwx.active': payerWallet !== 'unknown',
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});
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return res.json({ jsonrpc: '2.0', id: rpcId, result: tasks.get(taskId) });
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} catch (err) {
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updateTask(taskId, 'failed', {
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kind: 'message', role: 'agent', messageId: uuidv4(), parts: [{ kind: 'text', text: `Error: ${err.message}` }], taskId, contextId,
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});
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return res.json({ jsonrpc: '2.0', id: rpcId, result: tasks.get(taskId) });
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}
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}
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function handleTasksGet(rpcId, params, res) {
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const task = tasks.get(params?.id);
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if (!task) return res.json({ jsonrpc: '2.0', id: rpcId, error: { code: -32001, message: 'Task not found' } });
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return res.json({ jsonrpc: '2.0', id: rpcId, result: task });
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}
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function handleTasksCancel(rpcId, params, res) {
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const task = tasks.get(params?.id);
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if (!task) return res.json({ jsonrpc: '2.0', id: rpcId, error: { code: -32001, message: 'Task not found' } });
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updateTask(params.id, 'canceled');
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return res.json({ jsonrpc: '2.0', id: rpcId, result: task });
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}
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// === Express App ===
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const app = express();
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app.use(express.json({ limit: '10mb' }));
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app.get('/.well-known/agent-card.json', (req, res) => res.json(agentCard));
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app.post('/', handleJsonRpc);
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app.get('/dashboard', (req, res) => res.type('html').send(getDashboardHtml()));
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app.get('/api/info', (req, res) => res.json({
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agent: agentCard,
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payments: {
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version: '2.0',
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networks: Object.values(NETWORKS).map(n => ({ network: n.caip2, name: n.name, gasless: n.gasless || false })),
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token: 'USDC', wallet: WALLET_ADDRESS, facilitator: FACILITATOR_URL,
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features: ['siwx', 'payment-identifier', 'bazaar-discovery'],
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services: { screenshot: '$0.01', 'markdown-to-pdf': '$0.005', 'markdown-to-html': 'free' },
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},
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stats: {
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payments: paymentLog.length, tasks: tasks.size, uptime: process.uptime(),
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siwxSessions: siwxSessions.size,
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paymentsByType: {
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required: paymentLog.filter(p => p.type === 'payment-required').length,
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received: paymentLog.filter(p => p.type === 'payment-received').length,
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settled: paymentLog.filter(p => p.type === 'payment-settled').length,
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siwxAccess: paymentLog.filter(p => p.type === 'siwx-access').length,
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},
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},
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}));
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app.get('/api/payments', (req, res) => res.json({ payments: paymentLog.slice(-50), total: paymentLog.length }));
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app.get('/api/siwx', (req, res) => {
|
|
const sessions = [];
|
|
for (const [wallet, data] of siwxSessions.entries()) {
|
|
sessions.push({ wallet, skills: [...data.paidSkills], lastPayment: data.lastPayment });
|
|
}
|
|
res.json({ sessions, total: sessions.length });
|
|
});
|
|
app.get('/x402', (req, res) => res.json({
|
|
service: 'OpSpawn A2A x402 Gateway', version: '2.0.0',
|
|
description: 'A2A-compliant agent with x402 V2 micropayment services on Base + SKALE',
|
|
provider: { name: 'OpSpawn', url: 'https://opspawn.com' },
|
|
protocols: {
|
|
a2a: { version: '0.3.0', agentCard: '/.well-known/agent-card.json', sendMessage: '/' },
|
|
x402: {
|
|
version: '2.0',
|
|
networks: Object.values(NETWORKS).map(n => ({
|
|
network: n.caip2, name: n.name, chainId: n.chainId,
|
|
token: 'USDC', tokenAddress: n.usdc, gasless: n.gasless || false,
|
|
})),
|
|
facilitator: FACILITATOR_URL, wallet: WALLET_ADDRESS,
|
|
features: {
|
|
siwx: 'Sign-In-With-X session auth — pay once, access again without repaying',
|
|
'payment-identifier': 'Idempotent payments — retries do not double-charge',
|
|
'bazaar-discovery': 'Machine-readable API schemas in payment requirements',
|
|
},
|
|
},
|
|
},
|
|
endpoints: [
|
|
{ skill: 'screenshot', price: '$0.01', description: 'Capture webpage as PNG', input: 'URL in text', output: 'image/png' },
|
|
{ skill: 'markdown-to-pdf', price: '$0.005', description: 'Convert markdown to PDF', input: 'Markdown text', output: 'application/pdf' },
|
|
{ skill: 'markdown-to-html', price: 'free', description: 'Convert markdown to HTML', input: 'Markdown text', output: 'text/html' },
|
|
],
|
|
}));
|
|
app.get('/health', (req, res) => res.json({ status: 'ok', uptime: process.uptime(), timestamp: new Date().toISOString() }));
|
|
app.get('/favicon.ico', (req, res) => res.status(204).end());
|
|
|
|
app.listen(PORT, () => {
|
|
console.log(`\n A2A x402 Gateway on http://localhost:${PORT}`);
|
|
console.log(` Agent Card: /.well-known/agent-card.json`);
|
|
console.log(` Dashboard: /dashboard`);
|
|
console.log(` Services: screenshot($0.01), md-to-pdf($0.005), md-to-html(free)`);
|
|
console.log(` Wallet: ${WALLET_ADDRESS}\n`);
|
|
});
|
|
|
|
// === Dashboard HTML ===
|
|
function getDashboardHtml() {
|
|
return `<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>OpSpawn A2A x402 Gateway</title>
|
|
<style>*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:#0a0a0a;color:#e0e0e0}.hd{background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);padding:2rem;text-align:center;border-bottom:2px solid #00d4ff}.hd h1{font-size:2rem;color:#00d4ff;margin-bottom:.5rem}.hd p{color:#8899aa;font-size:1.1rem}.badges{display:flex;gap:.5rem;justify-content:center;margin-top:1rem;flex-wrap:wrap}.badge{padding:.3rem .8rem;border-radius:12px;font-size:.8rem;font-weight:600}.b-a2a{background:#1a3a5c;color:#4da6ff;border:1px solid #4da6ff}.b-x4{background:#1a3c2c;color:#4dff88;border:1px solid #4dff88}.b-base{background:#2a2a1a;color:#ffcc00;border:1px solid #ffcc00}.ct{max-width:1200px;margin:0 auto;padding:2rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:1.5rem;margin-top:1.5rem}.card{background:#1a1a1a;border:1px solid #333;border-radius:12px;padding:1.5rem}.card h2{color:#00d4ff;font-size:1.2rem;margin-bottom:1rem}.sr{display:flex;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid #222}.sl{color:#888}.sv{color:#fff;font-weight:600}.sc{background:#111;border:1px solid #2a2a2a;border-radius:8px;padding:1rem;margin-bottom:.75rem}.sn{font-weight:600;color:#00d4ff}.sp{float:right;font-weight:700}.sp.pd{color:#4dff88}.sp.fr{color:#888}.sd{color:#999;font-size:.9rem;margin-top:.3rem}.el{list-style:none}.el li{padding:.4rem 0;border-bottom:1px solid #1a1a1a;font-family:monospace;font-size:.85rem;color:#ccc}.el li span{color:#4da6ff;font-weight:600;margin-right:.5rem}.flow{text-align:center;padding:1rem 0}.fs{display:inline-block;padding:.5rem 1rem;border-radius:6px;font-size:.85rem;margin:.3rem}.fa{color:#4da6ff;font-size:1.2rem;vertical-align:middle}.fc{background:#1a2a3a;color:#4da6ff;border:1px solid #4da6ff}.fg{background:#1a3c2c;color:#4dff88;border:1px solid #4dff88}.fp{background:#2a2a1a;color:#ffcc00;border:1px solid #ffcc00}.fv{background:#2a1a2a;color:#ff88ff;border:1px solid #ff88ff}.ts{margin-top:2rem}.ts h2{color:#00d4ff;margin-bottom:1rem}.tf{display:flex;gap:.5rem;margin-bottom:1rem}.tf input{flex:1;padding:.7rem;background:#111;border:1px solid #333;border-radius:6px;color:#fff;font-size:1rem;font-family:monospace}.tf button{padding:.7rem 1.5rem;background:#00d4ff;color:#000;border:none;border-radius:6px;font-weight:600;cursor:pointer;white-space:nowrap}.tf button:hover{background:#00b8e0}.tf button:disabled{background:#555;cursor:wait}#result{background:#111;border:1px solid #333;border-radius:8px;padding:1rem;font-family:monospace;font-size:.85rem;white-space:pre-wrap;max-height:400px;overflow:auto;display:none;color:#ccc}.le{padding:.3rem 0;border-bottom:1px solid #1a1a1a;font-size:.85rem}.lt{color:#666}.ly{font-weight:600}.ly.payment-required{color:#ffcc00}.ly.payment-received{color:#4dff88}.ly.payment-settled{color:#00d4ff}footer{text-align:center;padding:2rem;color:#555;font-size:.85rem;border-top:1px solid #222;margin-top:2rem}footer a{color:#00d4ff;text-decoration:none}</style></head>
|
|
<body>
|
|
<div class="hd"><h1>OpSpawn A2A x402 Gateway</h1><p>Pay-per-request AI agent services via A2A protocol + x402 V2 micropayments</p><div class="badges"><span class="badge b-a2a">A2A v0.3</span><span class="badge b-x4">x402 V2</span><span class="badge b-base">Base USDC</span><span class="badge" style="background:#2a1a2a;color:#ff88ff;border:1px solid #ff88ff">SKALE</span><span class="badge" style="background:#1a2a2a;color:#66ffcc;border:1px solid #66ffcc">SIWx</span></div></div>
|
|
<div class="ct">
|
|
<div class="card" style="margin-bottom:1.5rem"><h2>Payment Flow</h2><div class="flow"><span class="fs fc">Agent Client</span><span class="fa">→</span><span class="fs fg">A2A Gateway</span><span class="fa">→</span><span class="fs fp">402: Pay USDC</span><span class="fa">→</span><span class="fs fv">Service Result</span></div><p style="text-align:center;color:#888;margin-top:.5rem;font-size:.9rem">Agent sends A2A message → Gateway returns payment requirements → Agent signs USDC → Gateway delivers result</p></div>
|
|
<div class="grid">
|
|
<div class="card"><h2>Agent Skills</h2><div class="sc"><span class="sn">Web Screenshot</span><span class="sp pd">$0.01</span><div class="sd">Capture any webpage as PNG. Send URL in message.</div></div><div class="sc"><span class="sn">Markdown to PDF</span><span class="sp pd">$0.005</span><div class="sd">Convert markdown to styled PDF document.</div></div><div class="sc"><span class="sn">Markdown to HTML</span><span class="sp fr">FREE</span><div class="sd">Convert markdown to styled HTML.</div></div></div>
|
|
<div class="card"><h2>Endpoints</h2><ul class="el"><li><span>GET</span> /.well-known/agent-card.json</li><li><span>POST</span> / (message/send)</li><li><span>POST</span> / (tasks/get)</li><li><span>POST</span> / (tasks/cancel)</li><li><span>GET</span> /x402</li><li><span>GET</span> /api/info</li><li><span>GET</span> /api/payments</li><li><span>GET</span> /health</li></ul></div>
|
|
<div class="card"><h2>Payment Info (x402 V2)</h2><div class="sr"><span class="sl">Networks</span><span class="sv">Base (eip155:8453) + SKALE</span></div><div class="sr"><span class="sl">Token</span><span class="sv">USDC</span></div><div class="sr"><span class="sl">Wallet</span><span class="sv" style="font-size:.75rem;word-break:break-all">${WALLET_ADDRESS}</span></div><div class="sr"><span class="sl">Facilitator</span><span class="sv">PayAI</span></div><div class="sr"><span class="sl">Protocol</span><span class="sv">x402 V2 + A2A v0.3</span></div><div class="sr"><span class="sl">SIWx</span><span class="sv" style="color:#66ffcc">Active (pay once, reuse)</span></div><div class="sr"><span class="sl">SIWx Sessions</span><span class="sv" id="ss">0</span></div></div>
|
|
<div class="card"><h2>Live Stats</h2><div class="sr"><span class="sl">Payment Events</span><span class="sv" id="sp">0</span></div><div class="sr"><span class="sl">Tasks</span><span class="sv" id="st">0</span></div><div class="sr"><span class="sl">Uptime</span><span class="sv" id="su">0s</span></div><div class="sr"><span class="sl">Agent Card</span><span class="sv"><a href="/.well-known/agent-card.json" style="color:#4da6ff">View JSON</a></span></div><div id="pl" style="margin-top:1rem;max-height:200px;overflow-y:auto"></div></div>
|
|
</div>
|
|
<div class="ts"><h2>Try It: Send A2A Message</h2><p style="color:#888;margin-bottom:1rem;font-size:.9rem">Free <b>Markdown to HTML</b> executes immediately. Paid skills return payment requirements.</p><div class="tf"><input type="text" id="ti" placeholder="Enter markdown or URL" value="# Hello from A2A This is a **test**."><button id="tb" onclick="go()">Send A2A Message</button></div><div id="result"></div></div>
|
|
</div>
|
|
<footer>Built by <a href="https://opspawn.com">OpSpawn</a> for the SF Agentic Commerce x402 Hackathon | x402 V2 + A2A v0.3 + SIWx + SKALE | <a href="/x402">Catalog</a> | <a href="/.well-known/agent-card.json">Agent Card</a> | <a href="/api/siwx">SIWx Sessions</a></footer>
|
|
<script>
|
|
async function rf(){try{const r=await fetch('/api/info'),d=await r.json();document.getElementById('sp').textContent=d.stats.payments;document.getElementById('st').textContent=d.stats.tasks;const ss=document.getElementById('ss');if(ss)ss.textContent=d.stats.siwxSessions||0;const s=Math.round(d.stats.uptime),h=Math.floor(s/3600),m=Math.floor((s%3600)/60),sec=s%60;document.getElementById('su').textContent=h>0?h+'h '+m+'m':m>0?m+'m '+sec+'s':sec+'s'}catch(e){}try{const r=await fetch('/api/payments'),d=await r.json(),el=document.getElementById('pl');if(d.payments.length)el.innerHTML=d.payments.slice(-10).reverse().map(p=>'<div class="le"><span class="lt">'+(p.timestamp?.split('T')[1]?.split('.')[0]||'')+'</span> <span class="ly '+p.type+'">'+p.type+'</span> '+(p.skill||'')+'</div>').join('')}catch(e){}}rf();setInterval(rf,3000);
|
|
async function go(){const i=document.getElementById('ti').value,b=document.getElementById('tb'),r=document.getElementById('result');b.disabled=true;b.textContent='Sending...';r.style.display='block';r.textContent='Sending...';try{const body={jsonrpc:'2.0',id:crypto.randomUUID(),method:'message/send',params:{message:{messageId:crypto.randomUUID(),role:'user',parts:[{kind:'text',text:i}],kind:'message'},configuration:{blocking:true,acceptedOutputModes:['text/plain','text/html','application/json']}}};const resp=await fetch('/',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(body)});const d=await resp.json();r.textContent=JSON.stringify(d,null,2);rf()}catch(e){r.textContent='Error: '+e.message}b.disabled=false;b.textContent='Send A2A Message'}
|
|
</script></body></html>`;
|
|
}
|