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 35) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 "exact" scheme with no API keys or rate limits required.
The parent site lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment, 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 and settle on the Base network using USDC. However, the specific endpoint being listed here (/api/v1/loans/35) is not explicitly documented on the site's landing page or in any crawled documentation, so its exact response schema and data content are unknown.
No OpenAPI spec, detailed docs, or example responses were found during the crawl — the docs, pricing, API, and README pages all rendered only a "Connect wallet" prompt with no substantive content. The endpoint accepts POST requests and returns application/json according to the x402 challenge metadata.
Capabilities
Use cases
- —Retrieving loan record data for loan ID 35 via a single paid API call
- —Integrating pay-per-request loan data into agent workflows without API key management
- —Programmatic access to financial loan information settled on Base L2
Fit
Best for
- —Agents needing on-demand loan data without subscription commitments
- —Developers experimenting with x402 payment protocol integrations
- —Workflows requiring keyless, pay-as-you-go API access on Base
Not for
- —Bulk loan data retrieval (single-resource endpoint, no batch support evident)
- —Users who need detailed documentation or response schema guarantees before integrating
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/35 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI spec, no response schema, no example responses, and the specific /api/v1/loans/35 path is not documented anywhere on the site. Docs pages are empty beyond a wallet-connect prompt. The actual data returned is entirely unknown.
Warnings
- —The /api/v1/loans/35 endpoint is not listed on the provider's landing page among their advertised APIs — its purpose and response format are undocumented.
- —All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.
- —No OpenAPI spec or response schema is available; the exact structure and content of the loan data is unknown.
- —This endpoint serves a single loan resource (ID 35); it is unclear whether other loan IDs are available or what the broader API surface looks like.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/loans/35
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/35
- —The site advertises $0.02 per request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —The /api/v1/loans/35 path is not listed among the site's advertised API endpointshttps://lowpaymentfee.com