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 (ID 83) via the x402 payment protocol. It is part of a broader platform that offers pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all gated behind x402 micropayments settled in USDC on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers receive a 402 challenge specifying the payment details, then attach an X-PAYMENT header with a signed USDC transaction to complete the request. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base, with a 300-second timeout window.
The platform advertises no API keys, no rate limits, and instant access. However, the specific loan endpoint (/api/v1/loans/83) is not listed among the documented API categories on the landing page, and no documentation describes the request body schema or response format for loan endpoints. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. As a result, the actual data returned by this endpoint and its expected input parameters are unknown.
Capabilities
Use cases
- —Retrieving loan data for a specific loan record (ID 83)
- —Programmatic access to financial loan information with per-request micropayments
- —Agent-driven data retrieval without API key management
Fit
Best for
- —Agents or applications that need on-demand loan data without subscription commitments
- —Developers experimenting with x402 micropayment-gated APIs
- —Scenarios requiring keyless, pay-as-you-go API access on Base
Not for
- —Bulk loan data retrieval where per-request pricing would be costly at scale
- —Use cases requiring well-documented request/response schemas before integration
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/83 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, the specific /api/v1/loans/83 path is not documented anywhere on the site, there is no OpenAPI schema, no request/response examples, and all documentation pages render only a wallet-connect prompt. The actual data returned and input parameters are entirely unknown.
Warnings
- —The /api/v1/loans/83 endpoint is not listed among the documented APIs on the landing page — its purpose and data format are unverified.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —No request body schema or response schema is available; integration requires trial-and-error.
- —The platform appears to be a generic x402 demo or template site — the actual utility of this specific loan endpoint is unclear.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/83
- —Platform advertises $0.02 per request 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/83
- —The /api/v1/loans/83 path is not listed among the documented API categories on the landing pagehttps://lowpaymentfee.com