x402 · pay per call

Data and compute your AI agent can buy, one call at a time.

373 endpoints for on-chain data, risk checks, markets, AI and proofs. Your agent pays a fraction of a cent in USDC and gets the answer. No account, no API key, no subscription.

Browse the catalog Connect your agent

      POST /evm-balance {"address":"0x…"}
      ← 402 Payment Required · $0.008 USDC
      POST /evm-balance + X-PAYMENT
      ← 200 OK balances + sources + receipt
    

373paid endpoints

$0.003cheapest call

4payment lanes

—of 2,357 x402 Bazaar sellers, by endpoints listed

Live373/373 payable · checked every 5 min

How it works

1Call the endpoint

Send a normal POST with your parameters. You get HTTP 402 with the price and where to pay.

2Pay in the same request

Sign a USDC payment on Base, Polygon or Solana and resend with an X-PAYMENT header.

3Get the answer and a receipt

You get the data, its sources and a signed receipt. Bad parameters are refused before you pay.

What's in the catalog

Risk & compliance

Wallet, token and contract screening before you move money.

8 endpoints →On-chain data

Balances, transactions and contract state across EVM, Bitcoin, Solana, XRPL and Stellar.

126 endpoints →Markets & DeFi

Prices, TVL, yields, stablecoins, DEX volume and protocol fees.

130 endpoints →AI & web

LLM completions, embeddings, page extraction and summaries on our own GPU.

30 endpoints →Proof & compute

Hashing, signed receipts, encoding and deterministic utilities.

42 endpoints →Research & records

Papers, Wikipedia, SEC filings, FX rates, packages and geodata.

37 endpoints →

Where you can find us

Listed in the directories agents and developers use to discover paid tools.

Coinbase x402 Bazaar

Listed in the official x402 discovery index — ranked #7 of 2,028 sellers by endpoints listed.

View the index →Official MCP Registry

io.github.FTHTrading/genesis402-mcp — the Model Context Protocol registry.

Find it in the registry →Smithery

Hosted MCP listing with a 98/100 quality score and typed outputs.

View on Smithery →mcpservers.org

Approved and listed as Genesis402.

View the listing →npm

genesis402-mcp — one command to add every endpoint to your agent.

View on npm →x402scan

Every payment to this rail, public and on-chain.

See payments →

Why agents use it

Honest answers

Every response names its sources. If a source can't be reached it says "unavailable" — never a fake zero.

Make-good guarantee

Undelivered paid calls are recorded as owed. Re-send the same payment and the call is re-delivered at $0. Settlements are reconciled on-chain every 4h over a 48h window.

Public payments

Every payment is on-chain and visible on x402scan, each with a signed receipt.

Need your own x402 rail?

We build this for other teams: your API or MCP server behind pay-per-call, at a fixed price in 7 days.

See packages