Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/loans/66` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/loans/66` is labeled "Premium API Access" and appears to serve loan-related data, though the exact response schema and input parameters are not documented in the available crawl material.
The x402 challenge confirms the endpoint is live, accepting POST requests with a maximum payment of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a 300-second timeout. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.
Documentation 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, and no description of what the `/loans/66` endpoint actually returns. The endpoint path suggests it retrieves or processes data for a specific loan (ID 66), but the exact semantics — whether this is a financial calculator, a DeFi loan lookup, or something else — cannot be confirmed from available sources.
Capabilities
Use cases
- —Retrieving loan-related data on a per-request payment basis
- —Integrating pay-per-call financial data into agent workflows
- —Accessing loan information without API key registration
Fit
Best for
- —Agents or developers who want keyless, pay-per-call access to loan data
- —x402-compatible wallets on Base network
- —Low-volume or sporadic API consumers who prefer no subscriptions
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integration
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone requiring non-USDC or non-Base-network payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/66 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC per request). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the /loans/66 endpoint actually returns. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; input parameters and output format are unknown
- —The purpose of /api/v1/loans/66 is unclear — 'Premium API Access' is a generic label that does not describe the data returned
- —The /loans/66 path is not listed among the advertised APIs on the homepage, raising questions about whether it is a production endpoint
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/66
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/66
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs