x402-payable loan data endpoint on Base, $0.02 per request via USDC
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan record (ID 94) via the x402 payment protocol. It accepts POST requests and returns JSON data upon payment of 20,000 base units of USDC on the Base network, which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider, lowpaymentfee.com, hosts a broader catalog of x402-payable 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 and settle on the Base network using USDC.
The specific endpoint /api/v1/loans/94 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 all resolve to a minimal "Connect wallet" prompt with no additional technical detail. Without an OpenAPI spec, example responses, or field-level documentation, the exact shape and content of the returned loan data remain unknown.
Capabilities
Use cases
- —Retrieving loan record data for loan ID 94 on demand
- —Demonstrating x402 payment protocol integration with USDC on Base
- —Agent-driven financial data retrieval without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call access to loan data
- —Projects already using USDC on the Base network
Not for
- —Bulk loan data retrieval or batch processing (no documented batch endpoints)
- —Users who need detailed documentation or guaranteed SLA before integrating
- —Anyone needing loan data for IDs other than 94 (only this specific resource is confirmed)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/94 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (returns a valid 402 challenge with clear pricing), but there is no OpenAPI spec, no response schema, no example data, and the docs pages are empty stubs. The purpose of the loan data and its fields are entirely unknown, making this effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no technical content
- —No OpenAPI or schema describing request parameters or response format for /api/v1/loans/94
- —The endpoint is for a single hardcoded loan ID (94); it is unclear whether other loan IDs are available
- —The label 'Premium API Access' is generic and does not describe the actual data returned
- —Cannot verify what loan data is returned without making a paid request
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/94
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/94
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages contain only a 'Connect wallet' prompt with no additional contenthttps://lowpaymentfee.com/docs