Sixteen services.
Three payment rails.
One call.

x402-paid endpoints for AI agents. Your agent's wallet pays $0.001–$1.77 per call in USDC on Base or Solana — or in JPYC on Polygon, ¥1 per anchor. EIP-3009 gasless. No keys, no signup.

Three round-trips. One signature.

A real call to /v1/screen from any x402 client. Your agent never holds an API key — the wallet's the credential.

1 agent requests

GET /v1/screen?address=0x1234…
→ 402 Payment Required
   x-payment-required: { ... $0.001 USDC ... }

2 agent signs

// EIP-3009 transferWithAuthorization
// signed by agent's own wallet — no
// custody, no balance with anchor.
x-payment: eyJzaWc...

3 server settles + returns

GET /v1/screen + x-payment
→ 200 OK
   { "sanctioned": false, "lists": [] }
   x-payment-response: { tx: 0xabc... }

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What this is, in one paragraph

anchor-x402 is sixteen stateless x402 endpoints that any AI agent can call and pay for in a single round-trip. Each call returns an x402 v2 PaymentRequired challenge; the agent signs an EIP-3009 authorization from its own wallet, replays the request, and gets the result. Settlement happens on Base or Solana (USDC via Coinbase’s CDP facilitator) or Polygon (JPYC via an in-process facilitator). Live at https://api.anchor-x402.com — see the /health probe or the Swagger UI.

If you don’t have your own agent, chat.anchor-x402.com is a hosted Claude that runs the same sixteen services on your behalf. Connect a wallet (Coinbase Smart Wallet with a passkey, MetaMask, Rabby — any of them), chat for free, and approve each paid tool call one EIP-3009 signature at a time.

Have an x402 endpoint?

If you run a paid x402 service and want it exposed through this agent — listed in the chat surface, included in the anchor-x402-mcp npm package, cross-linked from this site, and discoverable through our existing listings — email [email protected]. Include the endpoint URL, one-line description, and price. First listing is free if it covers something we don’t already do well.

White-label / custom-bot tier — your branding, your system prompt, your tool subset, your tenant-scoped subdomain, revenue share on tool calls — same address.

For institutional reviewers

The full security posture lives at /trust/ — STRIDE threat model, pre-filled SIG-Lite questionnaire, code-level self-audit guide, regulated deployment guide, on-chain verifiability primer, and observability docs.

No SOC 2 / ISO 27001 / PCI / HIPAA — this is the commodity tier, fit for sandboxes, POCs, and non-binding workflows. An institutional tier ($499–$5,000+/mo) is available on request: per-tenant authentication, signed MSA/DPA/SLA, WORM evidence vault on S3 Object Lock, GDPR Article 17 erasure reconciled with AML retention. Email [email protected].

For agents and developers

MCP server: anchor-x402-mcp on npm. One config block in Claude Desktop, Claude Code, Codex CLI, ChatGPT Desktop, Cursor, or OpenAI Agents SDK and the services become callable tools that auto-pay from your Base wallet. npx anchor-x402-mcp.
Direct HTTP: any x402 v2 client SDK works — @x402/fetch for TypeScript, the Python x402 SDK, or Rust. Same dance: 402 → sign → retry.
Source: github.com/hypeprinter007-stack/anchor-x402 (MIT licensed — fork it, audit it, deploy your own)
Discovery surfaces: CDP Bazaar, agentic.market, Agent Arena (ERC-8004), Virtuals ACP, the Official MCP Registry, Glama, mcp.so.

On-chain verifiability

/v1/anchor, /v1/attest, /v1/oracle, and /v1/investigate reports each write a 32-byte hash to both Base and Solana mainnet. The on-chain bytes are independent of this service — anyone can verify a receipt by reading the chains directly. Tampering would require breaking SHA-256 or simultaneously reorganizing two L1s. Live examples at /trust/on-chain-verifiability.

Contact

Christopher Ferjo · [email protected] · security disclosures: [email protected] · @thexferj

Sixteen services. Three payment rails. One call.