Pay-per-call loan data API on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides access to a loans resource (specifically loan ID 60) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).
The provider's landing page advertises a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. However, this specific endpoint (/api/v1/loans/60) is not listed among those categories on the homepage, and no documentation describes what the loans resource actually returns. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content.
Because there is no OpenAPI schema, no request/response examples, and no documentation explaining the loans endpoint's input parameters or output format, the actual functionality is unclear. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepts payments. The pricing model is straightforward: no API keys, no rate limits, pay per request with USDC on Base.
Capabilities
Use cases
- —Retrieving loan data for a specific loan ID via a single paid API call
- —Integrating pay-per-request financial data into agent workflows without API keys
- —Programmatic access to loan information settled via on-chain USDC micropayments
Fit
Best for
- —Agents or developers who want keyless, pay-per-call access to loan data
- —Users already on the Base network with USDC who need frictionless API access
- —Prototyping x402 payment flows with a low-cost endpoint
Not for
- —Users needing detailed API documentation or guaranteed schema stability
- —Bulk data retrieval where per-request pricing would be cost-inefficient
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/60 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is zero documentation for the /api/v1/loans/60 endpoint — no schema, no examples, no description of what it returns. The docs pages are empty. The endpoint isn't even listed on the provider's own homepage catalog.
Warnings
- —No documentation exists for the /api/v1/loans/60 endpoint — its purpose and response format are unknown
- —The loans endpoint is not listed among the provider's advertised API catalog on the homepage
- —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no content
- —No OpenAPI schema or request/response examples available
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/60
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/60