Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource ID 287) behind an x402 paywall. The provider operates a broader platform offering multiple API categories — 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/287/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers receive a 402 challenge containing payment details (payTo address, asset contract, amount), construct an on-chain USDC payment on Base, and include the payment proof in the `X-PAYMENT` header to access the resource. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are required.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the receipt payload contains. The endpoint is confirmed live (402 challenge captured), but the actual utility and response format remain unclear.
Capabilities
Use cases
- —Retrieving a transaction receipt for a specific transaction ID
- —Programmatic access to financial transaction data via micropayment
- —Agent-driven on-chain payment for API access without API keys
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call API access on Base
- —Low-volume, on-demand transaction receipt lookups
Not for
- —High-volume batch retrieval of many transaction receipts (no bulk endpoint documented)
- —Users who need detailed API documentation or response schema guarantees before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/287/receipt
# Returns 402 with x402 challenge. Include X-PAYMENT header with USDC payment proof on Base to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the receipt contains. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or output schema provided; response format is unknown
- —The specific resource '/api/v1/transactions/287/receipt' appears to be a single hardcoded transaction ID — unclear if this generalizes to other IDs
- —No request body schema documented for the POST method
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/287/receipt
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/287/receipt