x402-payable loan data endpoint on Base, settling in USDC at $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to loan data (resource ID 97) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring up to 20,000 base units (i.e., $0.02 per call, since USDC uses 6 decimals).
The broader lowpaymentfee.com platform advertises a variety of x402-gated endpoints spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific endpoint `/api/v1/loans/97` is not listed on the site's landing page among the advertised APIs, and no documentation describes its request body schema or response format. The endpoint is live (returns a valid 402 challenge), but the actual data it returns upon successful payment is unknown from the available material.
Because there is no OpenAPI spec, no request/response examples, and no dedicated documentation for this loans endpoint, the practical utility for agents is limited to what can be inferred from the x402 challenge alone: it is a POST endpoint returning application/json, costing $0.02 in USDC on Base.
Capabilities
Use cases
- —Fetching loan-related data on a per-request payment basis without API keys
- —Integrating pay-per-call loan information into automated agent workflows
- —Demonstrating x402 payment protocol integration on Base with USDC
Fit
Best for
- —Agents that need on-demand loan data with no subscription or API key
- —Developers experimenting with x402 payment protocol on Base
- —Low-volume, pay-as-you-go access to financial data
Not for
- —High-volume bulk loan data retrieval (no documented rate limits but no bulk discount either)
- —Users who need detailed documentation or guaranteed SLA before integrating
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/97 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI spec, no request/response examples, and no documentation for this specific /loans/97 resource. The endpoint isn't even listed among the site's advertised APIs, making its purpose and output schema entirely unknown.
Warnings
- —No documentation exists for /api/v1/loans/97 — the endpoint is not listed on the provider's landing page among available APIs
- —No request body schema or response schema is available; agents cannot know what to send or what they will receive
- —The /docs, /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content
- —The purpose and data returned by this specific loan endpoint are completely unknown
Citations
- —The x402 challenge requires up to 20,000 base units of USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/loans/97
- —The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The /api/v1/loans/97 endpoint is not listed among the site's advertised API categorieshttps://lowpaymentfee.com