Pay-per-call loan data API on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides access to a loan resource (loan ID 73) 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 a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).
The provider lowpaymentfee.com hosts a broader catalog of pay-per-call 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 endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payment is handled entirely through the x402 protocol on the Base L2 network.
The specific endpoint `/api/v1/loans/73` is labeled "Premium API Access" in the x402 challenge but its exact response schema and the nature of the loan data it returns are not documented. No OpenAPI spec, detailed docs, or example responses were found in the crawl. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content.
Capabilities
Use cases
- —Fetching loan record data on a per-call payment basis without needing an API key
- —Integrating pay-per-use financial data into agent workflows via x402
- —Accessing loan information programmatically with USDC micropayments on Base
Fit
Best for
- —Agents or apps that need on-demand loan data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs
- —Low-volume or sporadic access to financial loan records
Not for
- —High-volume bulk loan data retrieval where per-call pricing is inefficient
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/73 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty. The purpose of the specific loan/73 resource is unexplained, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The exact data returned by /api/v1/loans/73 is undocumented — 'Premium API Access' is the only description
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no useful content
- —The endpoint path references a specific loan ID (73); it is unclear whether other loan IDs are available or what the data represents
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/73
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/73
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The provider offers APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com