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 access to a transaction receipt resource (transaction ID 374) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact payment scheme. The price per call is $0.02 (20,000 base units of USDC with 6 decimals).
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
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 specification, no request/response schema documentation, and no example payloads available. The specific endpoint probed (/api/v1/transactions/374/receipt) is not listed on the homepage's API catalog, making its purpose and response format unclear. The x402 challenge confirms the endpoint is live and accepting payment, but what data it actually returns remains undocumented.
Capabilities
Use cases
- —Retrieving a transaction receipt for transaction 374 via programmatic pay-per-call access
- —Demonstrating x402 payment protocol integration on the Base network
- —Agent-driven micropayment workflows that settle in USDC without API keys
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call API access on Base
- —Micropayment use cases where $0.02/request is acceptable
Not for
- —Production workloads requiring documented request/response schemas
- —Users who need bulk or subscription-based pricing
- —Anyone needing detailed API documentation or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/374/receipt \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is zero documentation on request parameters, response schema, or what the endpoint actually returns. The specific resource path (transactions/374/receipt) is not listed in the site's own API catalog. Docs pages are empty beyond a wallet-connect prompt.
Warnings
- —No OpenAPI spec or schema documentation available
- —The /docs, /pricing, /api, and /README pages contain no usable content
- —This specific endpoint (/api/v1/transactions/374/receipt) is not listed in the provider's own API catalog on the homepage
- —Response format and request body requirements are completely undocumented
- —The endpoint appears to be for a single hardcoded transaction ID (374), which limits general utility
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/374/receipt
- —Platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages render only a 'Connect wallet' prompt with no technical contenthttps://lowpaymentfee.com/docs