x402-gated premium API endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/claims/15` is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific endpoint is labeled "Premium API Access" and accepts POST requests, returning JSON responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact-payment scheme.
The x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the site's uniform $0.02/request pricing across all endpoints. The platform advertises no API keys, no rate limits, and instant access. However, the specific functionality behind `/api/v1/claims/15` is not documented beyond the generic "Premium API Access" label; no input schema, expected parameters, or sample responses are provided in the crawled material.
The endpoint is live and returning a valid 402 challenge. The provider's landing page loads successfully (HTTP 200), but the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive documentation. Without knowing what data or service this particular claims endpoint returns, agents should treat this as an opaque paid endpoint whose actual output is uncertain.
Capabilities
Use cases
- —Accessing a gated premium data or service endpoint via x402 micropayment
- —Programmatic pay-per-request API consumption without API keys
- —Agent-driven API calls settled in USDC on Base
Fit
Best for
- —Developers or agents wanting key-less, pay-per-call API access
- —x402-compatible clients on the Base network
- —Low-cost micropayment API experimentation at $0.02/request
Not for
- —Users who need detailed documentation or known output schemas before paying
- —High-volume use cases where per-request pricing may add up without bulk discounts
- —Anyone requiring non-USDC or non-Base settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/claims/15 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it expects, or what it returns. The label 'Premium API Access' is generic and uninformative. Docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The specific functionality of /api/v1/claims/15 is undocumented — 'Premium API Access' is the only description available.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.
- —No input parameters, request body schema, or response schema are documented or inferable.
- —This endpoint's purpose within the 'claims' namespace is unclear and may differ from the other listed API categories.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/claims/15
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/claims/15
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com