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btc402: Bitcoin node data, paid per call.

No account, no subscription, no API key. An app or AI agent asks for Bitcoin data, pays a few cents in USDC, and gets the answer with a signed receipt.

Nov 10, 2026 · UnyKorn LLCSystemsx402BitcoinUSDC on Base

What it is

btc402 is a pay-per-call API gate operated by UnyKorn LLC. Each call returns Bitcoin mainnet data from UnyKorn's own node, and is paid for in USDC on Base using x402, the HTTP 402 payment standard now stewarded by the x402 Foundation at the Linux Foundation.

How a call works

  1. Ask. Call an endpoint such as /blockcount.
  2. Get a quote. The gate answers HTTP 402 with the price, the asset (USDC on Base) and where to pay.
  3. Sign. The caller's wallet signs one USDC transfer authorization for exactly that price and repeats the call.
  4. Get the data. The payment settles on Base and the gate returns the data with a signed record of the call.

Why it matters for stablecoins

It is a working example of what payment stablecoins are for: small, programmable, final payments between machines, settled in seconds without a card network or a monthly invoice. The same pattern runs through our x402 page and the wider Genesis402 catalog.

What you can check yourself

  • The btc402 page runs eight checks in your browser on the newest signed settlement: four on the record and four on the Base transfer. Each reads PASS, FAIL or UNAVAILABLE.
  • An open-source verifier, btc402-verify, checks the records from the command line.
  • As of 10 November 2026 the proof feed listed 6 logged calls: 2 paid calls totalling 0.006 USDC and 4 self-tests that UnyKorn paid to its own gate. Self-tests are labelled as such and not counted as sales.

Status and limits

btc402 is in a testing phase and its terms are in draft. A signed record shows the call was issued by the btc402 service key and not altered since; it is not an on-chain registry entry, an external timestamp or a third-party audit.

Where the UnyKorn x402 systems are listed

Genesis402, the catalog btc402 belongs to, is agent 95721 in the ERC-8004 Identity Registry on Base, with a public profile on 8004scan. Its server is indexed on x402scan, and its MCP connector is published on npm as genesis402-mcp.

Research and technical reference: not legal advice and not investment advice. Figures carry their source and date; regulatory summaries should be confirmed with counsel in the relevant jurisdiction.

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