x402basequality 0.35

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/347/receipt

What it does

This endpoint at lowpaymentfee.com provides access to a specific transaction receipt (transaction ID 347) behind an x402 paywall. The broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request, settled in USDC on the Base network.

The probed endpoint specifically returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this equals $0.02 per call, consistent with the site's advertised pricing. Payment is made via the x402 "exact" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through on-chain payment.

Documentation is extremely sparse — 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 available from the crawl. The specific nature of the data returned by the /transactions/347/receipt endpoint is unclear beyond the generic "Premium API Access" label and application/json MIME type.

Capabilities

x402-paymentusdc-settlementbase-networktransaction-receiptpay-per-requestno-api-key

Use cases

  • —Retrieving a transaction receipt for transaction 347 via programmatic x402 payment
  • —Demonstrating x402 protocol integration for pay-per-request API access
  • —Agents autonomously purchasing API data using on-chain USDC micropayments

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —AI agents that need to autonomously pay for API access without API keys
  • —Low-volume, on-demand data retrieval without subscription commitments

Not for

  • —High-volume batch processing where per-request fees add up quickly
  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Anyone without a Base-compatible wallet or USDC balance

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/347/receipt
# Returns 402 with x402 challenge. Supply X-PAYMENT header with valid USDC payment on Base to receive the receipt.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/347/receipt
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the purpose of this specific receipt endpoint is unclear. The broader platform lists many endpoints but provides no detail on any of them.

Warnings

  • —Documentation pages (/docs, /pricing, /api, /README) all render only 'Connect wallet' with no usable content
  • —No OpenAPI or schema documentation available for any endpoint
  • —The specific data returned by /transactions/347/receipt is undocumented — 'Premium API Access' is a generic label
  • —The broader platform lists many API categories (AI, finance, analytics, etc.) but none have documented request/response formats
  • —Cannot verify whether the listed AI/analytics/finance endpoints actually function or are placeholders

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:16:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/bX6jjL
x402-gated transaction receipt endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart