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 transaction receipt retrieval API. The specific resource `/api/v1/transactions/199/receipt` returns receipt data for transaction ID 199 in JSON format. Payment is handled inline via the x402 protocol: callers attach a USDC payment on the Base network in the `X-PAYMENT` header, and the endpoint returns the receipt data upon successful settlement.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers multiple pay-per-call API categories including data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments.
The x402 challenge for this specific endpoint advertises a `maxAmountRequired` of 20,000 base units of USDC (contract `0x8335...2913` on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. No OpenAPI spec or detailed documentation was found beyond the landing page listings; the docs, API, pricing, and README pages all returned only a wallet-connect prompt with no substantive content.
Capabilities
Use cases
- —Retrieving transaction receipt data on a per-call payment basis
- —Integrating pay-per-use API access into agent workflows without API key management
- —Programmatic access to transaction records settled via USDC on Base
Fit
Best for
- —Agents or applications needing keyless, pay-per-call API access
- —Developers who want to avoid subscription commitments for occasional API calls
- —Crypto-native workflows already operating on the Base network
Not for
- —High-volume use cases where per-call pricing may add up versus flat-rate plans
- —Users without access to USDC on the Base network for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/199/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 OpenAPI schema, no documented request/response format, no examples, and all documentation pages return only a wallet-connect prompt. The specific purpose of this particular receipt endpoint is unclear beyond the generic title.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown
- —All doc/pricing/README pages return only a wallet-connect prompt with no substantive content
- —The endpoint path references a specific transaction ID (199); it is unclear whether this is a generic pattern or a fixed resource
- —No examples of successful responses are available
Citations
- —The platform lists all endpoints at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with exact scheme and 300s timeouthttps://lowpaymentfee.com/api/v1/transactions/199/receipt
- —The platform offers categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com