x402-gated loan data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 76) via the x402 payment protocol. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind x402 micropayments on the Base network using USDC.
The specific endpoint `/api/v1/loans/76` is labeled "Premium API Access" by the provider. The x402 challenge confirms it is live and accepts POST requests. Payment is settled on-chain on Base using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments required.
While the landing page lists many endpoint categories (analytics, AI, finance, infrastructure), the specific `/api/v1/loans/76` path does not appear in the public catalog and its response schema is undocumented. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples available for this or any other endpoint on the platform.
Capabilities
Use cases
- —Retrieving loan data for a specific loan record via programmatic pay-per-call access
- —Integrating on-chain micropayment-gated data into agent workflows
- —Accessing financial data without API key registration
Fit
Best for
- —Agents or developers who want keyless, pay-per-request access to loan data
- —Workflows requiring on-chain USDC micropayments on Base for API access
- —Quick, low-commitment access to individual data records
Not for
- —Users needing detailed API documentation or response schemas before integrating
- —Bulk or high-volume data retrieval where per-request pricing is inefficient
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/76 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters, response schema, or what loan data is actually returned. The docs pages are empty. The /loans/76 path is not listed in the provider's own catalog, making it unclear what this endpoint actually provides.
Warnings
- —No OpenAPI spec or schema documentation available for this endpoint
- —The /api/v1/loans/76 path does not appear in the provider's public API catalog — its purpose is unclear
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content
- —Response format and fields are completely unknown — integration requires blind experimentation
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/loans/76
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/76