Pay-per-call loan data endpoint 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 (ID 70) via the x402 payment protocol. It accepts POST requests and returns JSON data upon payment of up to $0.02 in USDC on the Base network. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.
The provider, lowpaymentfee.com, hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02-per-request pricing model settled in USDC on Base.
The specific endpoint `/api/v1/loans/70` is labeled "Premium API Access" in the x402 challenge but no further documentation describes the loan data schema, request parameters, or response format. The docs, pricing, and API pages on the site are gated behind a wallet-connect flow and yield no additional content. Without an OpenAPI spec, example responses, or detailed documentation, the exact fields and behavior of this endpoint remain unclear.
Capabilities
Use cases
- —Retrieving loan record data programmatically with per-call USDC payment
- —Agent-driven financial data access without API key management
- —Integrating loan information into automated Web3 workflows
Fit
Best for
- —Developers needing keyless, pay-as-you-go access to loan data
- —AI agents that can settle x402 payments on Base
- —Prototyping financial data pipelines without subscription commitments
Not for
- —Users who need detailed documentation or guaranteed response schemas 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/70 \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no example request/response, and no documentation beyond the generic landing page. The specific purpose of /api/v1/loans/70 is undocumented, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The response format and request parameters for /api/v1/loans/70 are completely undocumented
- —Docs, pricing, and API pages are gated behind wallet-connect and provide no readable content
- —The endpoint name 'Premium API Access' is generic and does not describe the actual data returned
- —Cannot confirm what 'loan' data is served — could be financial loan records, sample/demo data, or placeholder content
Citations
- —The endpoint returns a 402 challenge requesting up to 20000 base units of USDC (asset 0x8335…) on Base networkhttps://lowpaymentfee.com/api/v1/loans/70
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals, so 20000 base units = $0.02https://lowpaymentfee.com
- —All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com