Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" receipt resource for transaction #62 via the x402 payment protocol. It accepts POST requests and returns JSON after receiving a USDC micropayment on the Base network. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (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 priced uniformly at $0.02 per request with no API keys, no rate limits, and no commitments required — payment is handled entirely through the x402 protocol using USDC on Base.
This specific endpoint (/api/v1/transactions/62/receipt) appears to serve a transaction receipt. Documentation beyond the landing page is minimal — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt, providing no additional schema or usage details. The endpoint is confirmed live (returns a proper 402 challenge), but the exact response payload structure is undocumented.
Capabilities
Use cases
- —Retrieving a transaction receipt after completing a payment flow
- —Programmatic verification of transaction completion
- —Agent-driven micropayment workflows that need proof-of-payment receipts
Fit
Best for
- —Developers building x402-compatible payment agents
- —Applications needing on-chain micropayment receipts on Base
- —Automated systems that require no-signup, pay-as-you-go API access
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume batch processing where per-call pricing is cost-prohibitive
- —Applications requiring fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/62/receipt \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is essentially absent — no response schema, no request body schema, no examples, and the docs pages are empty. The specific purpose of this receipt endpoint is unclear beyond its URL path.
Warnings
- —No documentation available beyond landing page — docs/pricing/README pages all show only 'Connect wallet'
- —No response schema or example response provided
- —The specific resource (transactions/62/receipt) suggests a fixed transaction ID, which may not be generally useful
- —Purpose and content of the receipt response is undocumented
Citations
- —Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/62/receipt
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/62/receipt
- —All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com