x402-gated loan data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/loans/12` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific `/loans/12` resource is labeled "Premium API Access" and returns JSON via POST. It is gated behind an x402 payment challenge on the Base network, accepting USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.
The broader lowpaymentfee.com platform advertises a uniform $0.02/request pricing model across all endpoints, covering categories like metrics, reports, sentiment analysis, text summarization, embeddings, price feeds, exchange rates, geocoding, and more. Documentation pages exist at `/docs`, `/pricing`, and `/README`, but all currently render only a "Connect wallet" prompt with no substantive content. As a result, there is no published schema, example request/response, or detailed documentation for this specific loans endpoint. The exact data returned by `/api/v1/loans/12` (e.g., loan details, financial calculations) is not documented and must be inferred from the endpoint path alone.
The endpoint is live and responds with a well-formed x402 challenge (version 1, scheme "exact"). Settlement occurs on Base mainnet to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second payment timeout.
Capabilities
Use cases
- —Fetching loan-related data on demand without API key management
- —Integrating pay-per-call financial data into agent workflows
- —Accessing premium loan information via crypto micropayments
Fit
Best for
- —Agents or apps that need on-demand loan data with no subscription
- —Developers building on Base who want frictionless USDC-settled API access
- —Prototyping financial data integrations without signup or rate limits
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume consumers who would prefer bulk or subscription pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/12 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no request/response schema, and no description of what data the /loans/12 resource actually returns. All doc pages render only 'Connect wallet' with no content.
Warnings
- —No documentation available — /docs, /pricing, and /README all render only a 'Connect wallet' prompt with no substantive content.
- —The exact data returned by /api/v1/loans/12 is unknown; the endpoint path suggests loan data but nothing is documented.
- —The endpoint path references a specific resource ID (12), which may be a single fixed record rather than a parameterized query.
- —This endpoint does not appear in the site's own listed API catalog, raising questions about its intended use.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/12
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (6 decimals), so 20000 base units = $0.02https://lowpaymentfee.com/api/v1/loans/12
- —Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages at /docs, /pricing, /README render only 'Connect wallet' with no contenthttps://lowpaymentfee.com/docs