Pay-per-request loan data API on Base via x402 — $0.02/call in USDC, no API keys required.
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan resource (`/api/v1/loans/68`) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract `0x8335…2913`) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader lowpaymentfee.com platform advertises a range of pay-per-call APIs across categories including 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 the same $0.02/request price point.
However, documentation for this specific loans endpoint is essentially absent. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no description of request parameters or response shape, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but what data it actually returns for loan ID 68 — or what POST body it expects — is unknown from the available material.
Capabilities
Use cases
- —Fetching loan data on-demand without subscription or API key management
- —Agent-driven financial data retrieval with per-call USDC micropayments
- —Integrating loan information into Web3 applications using x402 protocol
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go loan data access
- —AI agents that can settle x402 payments on Base
- —Web3 applications needing on-chain payment rails for API calls
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who need bulk pricing or subscription discounts
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/68 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the loans/68 resource actually contains. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —No documentation available — docs, API, pricing, and README pages all render only a wallet-connect prompt
- —No OpenAPI or schema describing request body or response format for /api/v1/loans/68
- —Purpose and data content of the loans endpoint is entirely unknown from available material
- —The endpoint path references a specific resource ID (68) with no explanation of what it represents
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/loans/68
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/68
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com