SpendPreflight
api.spendpreflight.com · 5 paid endpoints · listed 2026-10-27
SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Check a supplied x402 challenge or cart against caller spending/sanctions rules and cached index evidence. Returns allow/hold/block, reasons and a receipt. Missing/stale evidence stays unknown; no live merchant fetch, signing, settlement or custody. An allow result is not identity verification, safety, compliance certification or proof of paid delivery.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| POST | api.spendpreflight.com/v1/books/receipt SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Verify a native Base USDC transfer by tx | $0.01 | Base |
| POST | api.spendpreflight.com/v1/preflight SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Check a supplied x402 challenge or cart | $0.02 | Base |
| POST | api.spendpreflight.com/v1/token-check SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Base contract signals, not a safety verd | $0.02 | Base |
| POST | api.spendpreflight.com/listing-guard Bazaar Listing Guard: CDP technical validation plus a bounded heuristic metadata screen for agent-directed instructions, embedded URLs, tool calls, invisible Un | $0.05 | Base |
| POST | api.spendpreflight.com/v1/books/statement SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Export native Base USDC wallet transfers | $0.05 | Base |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 21 h ago | api.spendpreflight.com/v1/books/receipt | 402 | 598 | valid x402 v2 terms |
| 6 days ago | api.spendpreflight.com/listing-guard | 402 | 1422 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-11-02 | 1 | $0.02 | |
| 2026-11-01 | 6 | $0.191 |
Is this your API?
<a href="https://logicnodes.io/observatory/p/api.spendpreflight.com"><img src="https://logicnodes.io/observatory/badge/api.spendpreflight.com.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/api.spendpreflight.com