Pay-per-call customer data API on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to a customer resource (customer ID 81) 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 broader lowpaymentfee.com platform advertises a suite of endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text 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. However, the specific endpoint being listed here (/api/v1/customers/81) is not explicitly described among those categories on the landing page, so its exact data payload is unclear.
The x402 challenge was successfully captured (HTTP 402 with a well-formed accepts array), confirming the endpoint is live. Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so there is no OpenAPI schema, request/response examples, or detailed documentation available for this endpoint.
Capabilities
Use cases
- —Retrieving customer data on a pay-per-call basis without API key management
- —Agent-driven data retrieval with automatic USDC micropayments on Base
- —Accessing premium resources with no subscription or rate-limit overhead
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost per-request data without signup
Not for
- —Users who need detailed API documentation or OpenAPI schemas before integrating
- —High-volume use cases where a flat-rate subscription would be cheaper
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/81 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The specific purpose of /api/v1/customers/81 is not described anywhere on the site, making this effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt with no content.
- —The specific endpoint /api/v1/customers/81 is not listed among the advertised APIs on the landing page; its data payload is unknown.
- —No OpenAPI schema or request/response examples are provided.
- —No input schema is documented; the POST body format is entirely unknown.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/customers/81
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/customers/81
- —Documentation pages (/docs, /pricing, /api, /README) contain only a Connect wallet prompthttps://lowpaymentfee.com/docs