x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/loans/18` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific resource appears to serve loan-related data (loan ID 18), though the exact response schema is not documented in the available crawl material.
Payment is handled via the x402 protocol on the Base network. The endpoint accepts POST requests and requires an X-PAYMENT header containing a valid payment proof. The asset used for payment is USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints.
The platform advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no substantive content, so the actual request body format and response schema for this loans endpoint remain unknown. The endpoint is live and returning a proper 402 challenge, but the lack of documentation about what data it returns and what input it expects is a significant gap.
Capabilities
Use cases
- —Retrieving loan data for a specific loan ID via micropayment
- —Integrating pay-per-request loan information into agent workflows
- —Accessing financial loan records without API key registration
Fit
Best for
- —Agents needing on-demand loan data without subscription commitments
- —Developers experimenting with x402 pay-per-request protocols
- —Low-volume consumers who want to avoid API key management
Not for
- —High-volume bulk loan data retrieval (no documented batch support)
- —Users who need detailed API documentation before integrating
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/18 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid 402 challenge with clear pricing, but there is no documentation of the request body, response schema, or what 'loans/18' actually returns. All doc pages are empty stubs showing only 'Connect wallet'. The endpoint's purpose must be inferred entirely from the URL path.
Warnings
- —No documentation available — all doc pages (/docs, /pricing, /api, /README) return only 'Connect wallet' with no content
- —The exact request body format and response schema for /api/v1/loans/18 are completely unknown
- —This specific loans endpoint is not listed on the site's homepage API catalog, raising questions about whether it is a production resource
- —The provider's identity and data sources are not disclosed
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/loans/18
- —The platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/18