x402basequality 0.25

x402-gated transaction receipt endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/163/receipt

What it does

This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 163) behind an x402 paywall. It is part of a broader platform that advertises multiple API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/transactions/163/receipt` accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the accepted payment scheme (exact), the USDC asset contract on Base (`0x8335…`), and a maximum amount of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per call — consistent with the site's advertised flat pricing. No API keys or rate limits are required; access is granted immediately upon payment.

Documentation on the site is extremely thin — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint is live (confirmed by the 402 challenge), but the actual data returned after payment is unknown. The platform appears to be a demonstration or early-stage x402 service rather than a mature API provider.

Capabilities

x402-paymentusdc-settlementbase-networktransaction-receiptper-call-pricingno-api-keyjson-response

Use cases

  • —Retrieving a transaction receipt for transaction 163 via a single micropayment
  • —Demonstrating x402 protocol payment flows for agent-to-API commerce
  • —Testing USDC-based per-call API billing on Base

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need to pay-per-call without API key registration
  • —Testing micropayment flows on Base network

Not for

  • —Production workloads requiring documented request/response schemas
  • —Bulk data retrieval or batch processing
  • —Users who need detailed API documentation before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/163/receipt
# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof on Base to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/163/receipt
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response examples, and the docs pages are empty. The purpose of this specific receipt endpoint is unclear beyond its URL path. Effectively a stub listing.

Warnings

  • —No API documentation available — all doc pages render only 'Connect wallet'
  • —No OpenAPI or schema definition found
  • —No request body or response body examples available
  • —Purpose of 'transaction 163 receipt' is unclear — may be a demo or placeholder
  • —Platform maturity is uncertain; could be experimental

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:23:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/pq5zuX
x402-gated transaction receipt endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart