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 loan resource (ID 55) via the x402 payment protocol. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all priced at $0.02 per call and settled in USDC on the Base network.
The specific endpoint `/api/v1/loans/55` is labeled "Premium API Access" in the x402 challenge. The challenge confirms the endpoint is live, accepts POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is gated purely by the x402 payment header.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no description of the loan data returned, and no example request or response bodies. The platform's landing page lists many other endpoints but does not include `/api/v1/loans/55` among them, so the exact data returned by this endpoint is unknown.
Capabilities
Use cases
- —Retrieving loan record data on a per-request payment basis
- —Programmatic access to financial loan information without API key management
- —Agent-driven workflows that need on-demand loan data with crypto micropayments
Fit
Best for
- —Developers or agents needing keyless, pay-per-use loan data access
- —Crypto-native applications settling microtransactions on Base in USDC
- —Automated pipelines that prefer x402 payment gating over subscription models
Not for
- —Users who need detailed documentation or schema guarantees before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/55 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example responses, and the specific loan endpoint is not listed on the provider's own landing page. The purpose and shape of the returned data are entirely unknown.
Warnings
- —No documentation available — docs, API, pricing, and README pages all return only a wallet-connect prompt
- —No OpenAPI or output schema describing the response format
- —The endpoint /api/v1/loans/55 is not listed among the provider's advertised APIs on the landing page
- —Purpose and content of the 'loan' resource is unknown — could be placeholder or test data
Citations
- —The x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/loans/55
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/55
- —Platform advertises $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages show only a Connect wallet prompt with no substantive contenthttps://lowpaymentfee.com/docs