code402.dev / for agents

Validation your agent can buy on its own

Every established bank-detail verification service requires a signup, a contract, and a procurement cycle. That is fine for a treasury team. It is impossible for an autonomous agent that needs to check a counterparty at 2am with no human in the loop. Your agent cannot sign a SaaS agreement — so it cannot buy from them at all.

That is the gap this exists for. No account, no API key to provision, no onboarding form. Your agent calls the endpoint, receives an HTTP 402 challenge, signs a payment authorization, and gets its answer. Per call, from a wallet it already controls.

What makes it agent-native

Accountless. No signup and no key management. Nothing to provision before the first call.
Paid per call via x402. Gas-sponsored EIP-3009 USDC on Base. The agent pays itself; no human approves a purchase order.
Non-custodial. Payment goes directly from your agent's wallet to the recipient. We never hold funds.
A signed receipt per call. Every result carries an XDR-1 receipt verifiable offline against a published signer, so your agent's audit trail builds itself as it works.
Discoverable by machines. An MCP endpoint and a published manifest, so an agent can find the tools without a human reading a marketing page.
Free to try. A free daily allowance per client, with no wallet required, so your agent can attempt the call before it has funds.

What these checks are — and are not. They are structural: checksum and format, deterministic and offline-computable. They do not prove an account exists, is open, or belongs to the name on an invoice. Our sanctions screen is address- and jurisdiction-level only over the OFAC SDN digital-currency address list — a no-match is not a sanctions clearance. Every response states its own scope. If your agent needs ownership or name verification, this is not that, and buying it expecting that would be a mistake.

Wire it into your agent

# MCP: add the remote server, then call any tool
https://hcrb.in/mcp

# REST: the same tools over HTTP, 402 in, receipt out
curl -X POST https://hcrb.in/v1/tools/iban-check/call \
  -H 'content-type: application/json' \
  -d '{"input":{"iban":"GB29NWBK60161331926819"}}'

Try a free call Pay per call in USDC