Base Payment Evidence APIGET /api/v1/tx-brief/paid · x402 API by Transaction Evidence Brief
Verify Base mainnet payments and return deterministic transaction receipt evidence including status, gas, token events, flags, and source links for agent payment receipts, reconciliation, accounting, audits, and disputes.
What does this x402 API do?
Base Payment Evidence API. This is an x402-gated GET API resource from Transaction Evidence Brief. TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-08-05. The listing records $0.05 USD-denominated per request on Base. No settled paid call has been verified.
- Published price
- $0.05 USD-denominated per request
- Networks
- Base
- Latest evidence
- TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-08-05
- Resource ID
- d3013336e48f1e38aa977ba7
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://transaction-evidence-brief-2026.bowu365.chatgpt.site/api/v1/tx-brief/paid", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Observed in 402-index
Discovered through self-registered.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://transaction-evidence-brief-2026.bowu365.chatgpt.site/ returned 200.
- Registry record checked
Registry health: healthy.
What evidence supports this listing?
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →
Which networks and payment options does it accept?
The normalized listing price is $0.05 USD-denominated per request. Raw protocol requirements remain visible below for implementation and audit use.