x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides a transaction receipt resource via the x402 payment protocol. The specific path `/api/v1/transactions/60/receipt` returns a receipt for transaction ID 60 in JSON format, gated behind a per-request USDC micropayment on the Base network. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments of up to 20,000 base units of USDC (0.02 USD) per call, with a 300-second payment timeout.
The broader lowpaymentfee.com platform advertises a wide catalog of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (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. Payments settle in USDC on the Base L2 network.
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 usage examples available from the crawl. The exact behavior and response format of the transaction receipt endpoint (and the other listed endpoints) cannot be verified from the available material.
Capabilities
Use cases
- —Retrieving a transaction receipt for transaction ID 60 via a single micropayment
- —Programmatic access to paid API endpoints without API key management
- —Agent-driven pay-per-call workflows settled in USDC on Base
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —Agents that need keyless, pay-per-request API access
- —Use cases requiring on-chain micropayment settlement on Base L2
Not for
- —Users needing detailed API documentation or OpenAPI specs before integrating
- —High-volume batch processing where per-request fees add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/60/receipt \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is zero documentation beyond a landing page listing. No OpenAPI spec, no request/response schemas, no examples, and all doc pages return only 'Connect wallet'. The specific endpoint path (/transactions/60/receipt) is a single hardcoded resource ID with unclear general utility.
Warnings
- —No OpenAPI spec or schema documentation available
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
- —The endpoint path references a specific transaction ID (60); unclear if this is a general-purpose resource or a demo
- —Response format and fields are completely undocumented
- —The broader catalog of endpoints listed on the homepage cannot be verified as functional from the crawl
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/transactions/60/receipt
- —All endpoints listed at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs