Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/endpoint-85`) is listed as "Premium API Access" and accepts USDC payments on Base. The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (i.e., $0.02) per request. No API keys or rate limits are advertised; callers pay per request using an X-PAYMENT header.
The broader platform advertises endpoints across four categories: 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 (geocoding, validation, conversion, generation). All listed endpoints are priced at $0.02 per request. However, this particular endpoint path (`/api/endpoint-85`) does not match any of the documented API paths on the landing page, so its exact functionality is unclear.
The docs, pricing, and API pages returned only a "Connect wallet" prompt with no further documentation or schema details. There is no OpenAPI spec, no request/response schema beyond the x402 outputSchema stub, and no examples of what the endpoint actually returns. The endpoint is confirmed live (HTTP 402 challenge captured), but the lack of documentation makes it impossible to determine what data or service `/api/endpoint-85` provides.
Capabilities
Use cases
- —Programmatic access to paid API services without traditional API key registration
- —Agent-driven workflows that need on-demand API calls settled in USDC on Base
- —Exploring x402 protocol integrations for pay-per-use microservices
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring keyless, pay-as-you-go API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring known, well-documented request/response schemas
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/endpoint-85 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/endpoint-85 actually does. No OpenAPI spec, no request/response schema, no examples. The endpoint path doesn't match any documented API on the landing page. This is effectively a stub listing.
Warnings
- —Endpoint path /api/endpoint-85 does not match any documented API path on the provider's landing page — actual functionality is unknown.
- —No OpenAPI spec, request schema, or response schema available.
- —Docs, pricing, and API pages all returned only 'Connect wallet' with no usable content.
- —Cannot verify what data or service this endpoint provides.
Citations
- —The x402 challenge confirms the endpoint is live and accepts USDC on Base with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/endpoint-85
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com
- —Docs, pricing, API, and README pages returned only 'Connect wallet' with no further content.https://lowpaymentfee.com/docs