Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service accessible via the x402 payment protocol. It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request with no API keys, rate limits, or commitments required.
The specific endpoint `/api/v1/transactions/147/receipt` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The x402 challenge confirms the endpoint is live and operational, advertising version 1 of the protocol with a 300-second payment timeout.
Documentation on the site is extremely sparse—most pages beyond the landing page only show a "Connect wallet" prompt. There is no OpenAPI spec, no detailed request/response schema, and no usage examples available from the crawl. The exact structure of the receipt response and what input parameters the POST body expects are unknown from the available material.
Capabilities
Use cases
- —Retrieving a transaction receipt for a specific transaction ID
- —Programmatic verification of completed transactions
- —Agent-driven payment confirmation workflows
Fit
Best for
- —Agents needing on-demand transaction receipts without subscription
- —Developers wanting keyless, pay-per-use API access on Base
- —Automated systems that settle micropayments in USDC
Not for
- —Bulk historical transaction data retrieval (no batch endpoint documented)
- —Users without a Base-compatible USDC wallet
- —Applications requiring detailed API documentation or SDKs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/147/receipt \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The specific purpose of this receipt endpoint is only inferable from its URL path.
Warnings
- —No OpenAPI or schema documentation available
- —Request body parameters are unknown—no input schema documented
- —All documentation pages beyond the landing page return only 'Connect wallet' with no content
- —The endpoint path references a specific transaction ID (147); it is unclear if this is parameterized or fixed
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base network at 20000 base unitshttps://lowpaymentfee.com/api/v1/transactions/147/receipt
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/147/receipt