Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com provides a "Premium API Access" receipt for transaction ID 91. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint `/api/v1/transactions/91/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) to the payee address `0x1A2B...85F3` on Base. No API keys, rate limits, or upfront commitments are required — access is instant once payment is included.
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 spec, no request/response schema beyond the x402 challenge's `outputSchema`, and no examples of what the receipt payload actually contains. The platform lists many other endpoints (sentiment analysis, summarization, embeddings, price feeds, gas estimates, geocoding, etc.) at the same $0.02 price point, but none have documented schemas either. Treat this listing as a stub until richer documentation becomes available.
Capabilities
Use cases
- —Retrieving a transaction receipt for transaction 91 via a single paid API call
- —Demonstrating x402 pay-per-call integration on the Base network
- —Programmatic receipt fetching without API key management
Fit
Best for
- —Developers experimenting with x402 protocol payments
- —Agents that need on-demand, keyless API access settled in USDC
- —Projects requiring Base-network micropayment integration examples
Not for
- —Production workloads requiring well-documented request/response schemas
- —Bulk or high-volume receipt retrieval (no batch endpoint documented)
- —Users who need fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/91/receipt \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-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 OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this receipt endpoint is unexplained. Effectively a stub.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown.
- —All non-homepage pages (docs, API, pricing, README) render only 'Connect wallet' with no content.
- —The endpoint path includes a hardcoded transaction ID (91); it is unclear whether this is parameterized or fixed.
- —The broader platform lists many endpoints (AI, finance, utils) but none have documented schemas or examples.
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/transactions/91/receipt
- —All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access.https://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/transactions/91/receipt
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com