Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service accessible via the x402 payment protocol. It accepts POST requests and returns JSON responses. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals).
The endpoint is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to authenticate each request.
Documentation is extremely sparse—the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The specific endpoint path `/api/v1/transactions/343/receipt` suggests it returns a receipt for transaction ID 343, but the exact request body format and response structure are unknown.
Capabilities
Use cases
- —Retrieving transaction receipts programmatically without API key management
- —Paying per-call for on-demand financial data access
- —Integrating x402 payment flows into agent-based workflows
Fit
Best for
- —Agents needing keyless, pay-as-you-go API access
- —Developers experimenting with x402 payment protocol on Base
- —Low-volume callers who want no subscription commitments
Not for
- —High-volume batch processing where per-call fees add up quickly
- —Users who need detailed API documentation or SDKs before integrating
- —Applications requiring guaranteed SLAs or support contracts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/343/receipt \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (returns a valid 402 challenge) and pricing is clear, but there is no documentation, no OpenAPI spec, no request/response examples, and the docs pages are empty. The specific purpose of this particular endpoint (transaction 343 receipt) is unclear and may be a demo/placeholder.
Warnings
- —No API documentation available—all doc pages render only 'Connect wallet'
- —No OpenAPI or schema describing request/response formats
- —The endpoint path references a specific transaction ID (343), which may be a demo or placeholder rather than a general-purpose endpoint
- —Platform legitimacy and reliability are unverifiable from available materials
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base network at 20000 base unitshttps://lowpaymentfee.com/api/v1/transactions/343/receipt
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/343/receipt