x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 31) behind an x402 paywall. The provider operates a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per call and settled in USDC on the Base network.
The specific endpoint `/api/v1/loans/31` is labeled "Premium API Access" in the x402 challenge. Its exact response payload is undocumented — the provider's landing page lists many other endpoints but does not enumerate a `/loans/` category, so the content returned by this particular resource is unclear. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) on Base, and returns `application/json`.
The provider advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/README`) all resolve but contain only a "Connect wallet" prompt with no substantive content, so there is no schema documentation, example requests, or example responses available for this or any other endpoint on the platform.
Capabilities
Use cases
- —Retrieving loan record details programmatically with per-request USDC payment
- —Integrating loan data into agent workflows without API key management
- —Accessing financial data via x402 protocol on Base
Fit
Best for
- —Agents or services that need on-demand loan data without subscription commitments
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume consumers who prefer pay-per-call pricing
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume consumers who would benefit from bulk/subscription pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/31 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the /loans/31 resource actually returns. No request or response schemas, no examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The endpoint itself is not listed on the provider's own landing page catalog.
Warnings
- —The /api/v1/loans/31 endpoint is not listed among the provider's advertised API catalog — its purpose and response schema are unknown.
- —All documentation pages (/docs, /pricing, /README) contain only a 'Connect wallet' prompt with no actual content.
- —No request body schema or response schema is available; integration requires trial-and-error.
- —The endpoint's label 'Premium API Access' is generic and does not describe the actual data returned.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base networkhttps://lowpaymentfee.com/api/v1/loans/31
- —The provider advertises $0.02 per request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/31
- —Documentation pages resolve but contain only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs