x402basequality 0.35

x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/143/receipt

What it does

This endpoint at lowpaymentfee.com provides a transaction receipt resource (specifically for transaction ID 143) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per call, settled in USDC on the Base network.

The specific endpoint `/api/v1/transactions/143/receipt` accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds.

The platform advertises no API keys, no rate limits, and instant access. However, documentation beyond the landing page is essentially empty (all sub-pages just show "Connect wallet"), so the actual response schema, request parameters, and detailed behavior of this and other endpoints are unknown. The endpoint is confirmed live via a valid 402 challenge.

Capabilities

x402-paymentusdc-basepay-per-requesttransaction-receiptjson-responseno-api-key

Use cases

  • —Retrieving a transaction receipt for transaction 143 via a single micropayment
  • —Demonstrating x402 protocol integration for pay-per-request APIs
  • —Programmatic access to transaction data without API key management

Fit

Best for

  • —Developers experimenting with x402 protocol payments
  • —Agents that need one-off transaction receipt retrieval
  • —Low-friction API access without subscription or key provisioning

Not for

  • —Bulk transaction receipt retrieval (endpoint is scoped to a single transaction ID)
  • —Users who need detailed API documentation or response schema guarantees
  • —Production systems requiring SLA or rate-limit guarantees

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/143/receipt \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/143/receipt
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and all documentation pages are empty stubs. The endpoint is also scoped to a single hardcoded transaction ID (143), making its general utility unclear.

Warnings

  • —Documentation pages (/docs, /api, /pricing, /README) are all empty — only showing 'Connect wallet'
  • —No request or response schema is documented; actual payload structure is unknown
  • —Endpoint is hardcoded to transaction ID 143 — unclear if this is a demo or a real resource
  • —No OpenAPI spec or AI plugin manifest available
  • —Platform appears to be a demo or early-stage project with many advertised endpoints but no substantive docs

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:07:32Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/sZzKFx
x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request. — Clawmart · Clawmart