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 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 request. The platform advertises no API keys, no rate limits, and instant access, with all payments handled via x402 on-chain settlement.
Documentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical documentation. There is no OpenAPI spec, no request/response schema beyond the x402 challenge metadata, and no examples of what the receipt endpoint actually returns. The specific endpoint path (`/api/v1/transactions/23/receipt`) suggests it retrieves a receipt for transaction ID 23, but the exact payload structure is unknown.
Capabilities
Use cases
- —Retrieving transaction receipts programmatically with per-call payment
- —Integrating pay-as-you-go API access without managing API keys
- —Agents autonomously purchasing transaction data on-chain
Fit
Best for
- —Developers wanting keyless API access with crypto micropayments
- —AI agents that can settle x402 payments on Base
- —Users needing single transaction receipts without subscription commitments
Not for
- —Users who need bulk transaction data at scale (no documented batch endpoint)
- —Developers requiring detailed API documentation or SDKs
- —Users without access to USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/23/receipt \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and no OpenAPI spec. The docs pages are empty wallet-connect prompts. This is effectively a stub listing.
Warnings
- —No API documentation available—all doc pages show only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —Unclear what data the /transactions/23/receipt endpoint actually returns
- —No examples of successful responses available
- —The endpoint path contains a hardcoded ID (23), unclear if parameterized
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/transactions/23/receipt
- —Platform advertises $0.02 per request, no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/23/receipt
- —Payment recipient address: 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/transactions/23/receipt