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 17) 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, meaning a one-shot payment per call with no API keys, subscriptions, or rate limits required.
The broader lowpaymentfee.com platform advertises a range of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02/request price point. However, this specific listing is for the `/api/v1/loans/17` endpoint, which is described only as "Premium API Access" with no further documentation on what loan data it returns or what input it expects beyond a POST request.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no examples available. The endpoint accepts POST requests and returns application/json, but the actual payload structure is unknown.
Capabilities
Use cases
- —Retrieving loan data for loan ID 17 via a single paid API call
- —Integrating pay-per-request loan information into agent workflows
- —Accessing financial loan records without API key registration
Fit
Best for
- —Agents or developers needing on-demand loan data without subscription commitments
- —x402-compatible clients on the Base network
- —Micropayment-based API consumption with USDC
Not for
- —Users needing detailed API documentation or schema before integrating
- —Bulk or high-volume loan data retrieval where per-request pricing is inefficient
- —Non-crypto users who cannot pay with USDC on Base
Quick start
# Requires an x402-compatible client to attach payment header
curl -X POST https://lowpaymentfee.com/api/v1/loans/17 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response schema, no examples, and no explanation of what loan data is returned. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No request or response schema provided; unknown what data the endpoint returns
- —The endpoint path '/api/v1/loans/17' targets a specific loan ID with no explanation of what loan 17 represents
- —No OpenAPI spec or ai-plugin manifest found
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/loans/17
- —Price is $0.02 per request (maxAmountRequired 20000 base units of USDC, 6 decimals)https://lowpaymentfee.com/api/v1/loans/17
- —Platform advertises no API keys, no rate limits, instant access, $0.02/request pricinghttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/17