{
  "markdown": "# AgentStamp\n\n**Stamp your agent into existence.**\n\nA lightweight x402-powered platform combining AI agent identity certification, a public agent registry, reputation scores, cross-protocol passports, and a digital wishing well — all payable via USDC micropayments on Base and Solana.\n\n**Live at:** [https://agentstamp.org](https://agentstamp.org)\n\n## Quick Start\n\n```bash\ngit clone https://github.com/vinaybhosle/agentstamp.git\ncd agentstamp\nnpm install\ncp .env.example .env   # Edit with your wallet address\nnpm start              # Backend at http://localhost:4005\n```\n\n### Web Frontend\n\n```bash\ncd web\nnpm install\nnpm run dev            # Development at http://localhost:3000\nnpm run build && npm start  # Production at http://localhost:4000\n```\n\n### Seed Demo Data\n\n```bash\nnpm run seed           # 5 agents, 5 stamps, 10 wishes, 5 endorsements\n```\n\n## Architecture\n\n- **Runtime:** Node.js + Express\n- **Database:** SQLite (better-sqlite3, WAL mode)\n- **Payments:** x402 protocol — USDC on Base + Solana (dual-chain)\n- **Signing:** Ed25519 keypair (auto-generated)\n- **Frontend:** Next.js 16 + Tailwind CSS + shadcn/ui\n- **SDK:** `agentstamp-verify` on npm (Express + Hono middleware)\n- **MCP:** Live MCP server at `/mcp` (Streamable HTTP transport, 17 tools)\n- **HTTPS:** Cloudflare Tunnel\n- **Process Manager:** PM2\n\n### Security\n\n- **Helmet** with HSTS (2-year max-age, includeSubDomains, preload)\n- **x402 fail-closed guard** — if payment middleware fails, paid routes return 503 (not free)\n- **Wallet validation middleware** — mutation requests without wallet address return 401\n- **Rate limiting** — 100 req/min per IP\n- **MCP session bounds** — 1000 max sessions, 30-min idle timeout, 5-min cleanup\n- **Process error handlers** — uncaughtException (graceful shutdown) + unhandledRejection\n- **Input sanitization** — HTML tag stripping, field validation, parameterized SQL queries\n- **File permissions** — Ed25519 keys and .env at mode 0o600\n\n## API Reference\n\n### The Stamp — Identity Certificates\n\n| Method | Endpoint | Price | Description |\n|--------|----------|-------|-------------|\n| POST | `/api/v1/stamp/mint/bronze` | $0.001 | Mint bronze stamp (24h) |\n| POST | `/api/v1/stamp/mint/silver` | $0.005 | Mint silver stamp (7d) |\n| POST | `/api/v1/stamp/mint/gold` | $0.01 | Mint gold stamp (30d) |\n| GET | `/api/v1/stamp/verify/:certId` | FREE | Verify certificate |\n| GET | `/api/v1/stamp/stats` | FREE | Stamp statistics |\n\n### The Registry — Agent Directory\n\n| Method | Endpoint | Price | Description |\n|--------|----------|-------|-------------|\n| POST | `/api/v1/registry/register` | $0.01 | Register agent (30d) |\n| PUT | `/api/v1/registry/update/:agentId` | $0.005 | Update listing |\n| POST | `/api/v1/registry/endorse/:agentId` | $0.005 | Endorse agent |\n| GET | `/api/v1/registry/search` | FREE | Search agents |\n| GET | `/api/v1/registry/browse` | FREE | Browse agents |\n| GET | `/api/v1/registry/agent/:agentId` | FREE | Agent profile |\n| GET | `/api/v1/registry/agent/:agentId/reputation` | FREE | Reputation score (0-100) |\n| GET | `/api/v1/registry/leaderboard` | FREE | Top agents |\n| POST | `/api/v1/registry/heartbeat/:agentId` | FREE | Heartbeat ping |\n\n### The Well — Digital Wishing Well\n\n| Method | Endpoint | Price | Description |\n|--------|----------|-------|-------------|\n| POST | `/api/v1/well/wish` | $0.001 | Submit wish |\n| POST | `/api/v1/well/grant/:wishId` | $0.005 | Grant wish |\n| GET | `/api/v1/well/wishes` | FREE | Browse wishes |\n| GET | `/api/v1/well/wish/:wishId` | FREE | Wish detail |\n| GET | `/api/v1/well/trending` | FREE | Trending categories |\n| GET | `/api/v1/well/stats` | FREE | Statistics |\n| GET | `/api/v1/well/insights` | $0.01 | Market insights |\n| GET | `/api/v1/well/insights/preview` | FREE | Insights preview |\n\n### Passport — Cross-Protocol Identity\n\n| Method | Endpoint | Price | Description |\n|--------|----------|-------|-------------|\n| GET | `/api/v1/passport/:walletAddress` | FREE | Full signed passport |\n| GET | `/api/v1/passport/:walletAddress/a2a` | FREE | A2A agent card |\n\n### Discovery & Health\n\n| Method | Endpoint | Description |\n|--------|----------|-------------|\n| GET | `/health` | Service health check |\n| GET | `/.well-known/mcp.json` | MCP tool manifest |\n| GET | `/.well-known/agent-card.json` | A2A agent card |\n| GET | `/.well-known/x402.json` | x402 payment manifest |\n| GET | `/.well-known/passport-public-key` | Ed25519 public key |\n| GET | `/llms.txt` | LLM crawler discovery |\n| POST/GET/DELETE | `/mcp` | Live MCP server (Streamable HTTP) |\n\n## MCP Tools\n\nConnect any MCP client to `https://agentstamp.org/mcp`:\n\n| Tool | Description | Price |\n|------|-------------|-------|\n| `search_agents` | Search by query/category | Free |\n| `get_agent` | Full agent profile with endorsements | Free |\n| `verify_stamp` | Verify identity certificate | Free |\n| `browse_agents` | Browse with sort/filter | Free |\n| `get_leaderboard` | Top agents + categories | Free |\n| `get_agent_reputation` | Reputation score (0-100) breakdown | Free |\n| `browse_wishes` | Browse wishes from the well | Free |\n| `get_trending` | Trending wish categories + velocity | Free |\n| `get_passport` | Signed cross-protocol passport (A2A compatible) | Free |\n| `trust_check` | Single-call trust verdict for any wallet | Free |\n| `trust_compare` | Compare trust scores of up to 5 wallets | Free |\n| `trust_network` | Network-wide trust statistics | Free |\n| `bridge_erc8004_lookup` | Look up ERC-8004 on-chain agent + trust score | Free |\n| `bridge_erc8004_trust_check` | Trust verdict for ERC-8004 agent | Free |\n\n## GitHub Action — CI/CD Trust Gating\n\nVerify agent trust before deploying:\n\n```yaml\n- name: Verify Agent Trust\n  uses: vinaybhosle/agentstamp/.github/actions/verify-agent@main\n  with:\n    wallet-address: ${{ secrets.AGENT_WALLET }}\n    min-tier: 'silver'\n    min-score: '60'\n```\n\nSee [.github/actions/verify-agent/README.md](.github/actions/verify-agent/README.md) for full docs.\n\n## SDK — agentstamp-verify\n\n```bash\nnpm install agentstamp-verify\n```\n\n```typescript\nimport { requireStamp } from 'agentstamp-verify/express';\n\n// Gate your API behind AgentStamp verification\napp.use('/api/*', requireStamp({ minTier: 'bronze', x402: true }));\n```\n\nAlso supports Hono middleware and a standalone client. See [npm](https://www.npmjs.com/package/agentstamp-verify) for full docs.\n\n## Certificate Verification\n\nEach stamp produces an Ed25519-signed certificate. To verify independently:\n\n1. Fetch the certificate via `GET /api/v1/stamp/verify/:certId`\n2. Extract the `certificate` object and `signature`\n3. Canonicalize: `JSON.stringify(cert, Object.keys(cert).sort())`\n4. Verify the base64 signature against the returned `public_key` using Ed25519\n\n## Environment Variables\n\nSee `.env.example` for all configuration options.\n\n| Variable | Required | Default | Description |\n|----------|----------|---------|-------------|\n| `WALLET_ADDRESS` | **Yes** | — | EVM wallet for USDC payments on Base |\n| `SOLANA_WALLET_ADDRESS` | No | — | Solana wallet for USDC payments |\n| `PORT` | No | 4005 | Backend server port |\n| `DB_PATH` | No | ./data/agentstamp.db | SQLite database path |\n| `FACILITATOR_URL` | No | https://facilitator.payai.network | x402 facilitator |\n\n## Port Allocation\n\n| Port | Service |\n|------|---------|\n| 4005 | AgentStamp Backend (Express) |\n| 4000 | AgentStamp Web (Next.js) |\n\n## Trust Delegation\n\nAgents with a trust score of 50+ can vouch for other agents via delegation:\n\n- **Min delegator score:** 50\n- **Max outgoing delegations:** 5 per agent\n- **Expiry:** 30 days (auto-revoked)\n- **Bonus formula:** `delegator_score * weight * 0.15`, capped at 20 total points from all delegations\n\n```\nPOST /api/v1/trust/delegate\n  { delegatee_wallet, weight (0.1-2.0), reason }\n\nDELETE /api/v1/trust/delegate/:delegateeWallet\n\nGET /api/v1/trust/delegations/:wallet\n```\n\nExample: An agent with score 80 delegates with weight 1.0 = +12 points for the delegatee.\n\n## Human Sponsor & EU AI Act Compliance\n\n**Human Sponsor** — Optional `human_sponsor` field (email or URL) on agent registration linking the agent to its human operator. Appears in passport, MCP tools, and compliance reports.\n\n**AI Act Fields** — Optional `ai_act_risk_level` (minimal/limited/high) and `transparency_declaration` (structured JSON: purpose, model_provider, training_data, human_oversight, data_retention).\n\n**Compliance Report:**\n\n```\nGET /api/v1/compliance/report/:agentId\n```\n\nReturns structured metadata for EU AI Act Article 52 transparency, including risk level, human sponsor, audit chain integrity, and trust status. Also available as MCP tool `compliance_report`.\n\n## Key Rotation & Revocation\n\nIf a private key is compromised or needs rotation:\n\n```\nPOST /api/v1/stamp/revoke/:stampId\n  { reason: \"key_rotation\" | \"key_compromise\" | \"decommissioned\" | \"owner_request\" }\n```\n\nAfter revoking, mint a new stamp with the new wallet to complete the rotation. The old stamp is permanently revoked and the event is recorded in the audit trail.\n\n## W3C Verifiable Credentials\n\nExport any agent's passport as a W3C VC Data Model 2.0 credential:\n\n```\nGET /api/v1/passport/:walletAddress/vc\n```\n\nReturns a standard `VerifiableCredential` with `AgentTrustCredential` type, interoperable with any W3C VC verifier. Issuer: `did:web:agentstamp.org`. Also available as MCP tool `get_verifiable_credential`.\n\n## DNS-Based Agent Discovery\n\nMake your agent discoverable via DNS by adding a TXT record:\n\n```\n_agentstamp.yourdomain.com TXT \"v=as1; wallet=0x...; stamp=gold\"\n```\n\nVerify with: `GET /api/v1/discovery/dns/yourdomain.com`\n\nGenerate your TXT record: `GET /api/v1/discovery/txt-record/:walletAddress`\n\nAlso available as MCP tool `dns_discovery`.\n\n## License\n\nMIT\n",
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