Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/transfers/79` is listed as "Premium API Access" and advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and returns application/json. The x402 challenge was successfully captured, confirming the endpoint is live.
The platform's landing page lists 16 endpoints spanning categories like metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for individual endpoints are unknown.
Capabilities
Use cases
- —Accessing premium API endpoints without subscription or API key management
- —Making one-off paid API calls settled instantly in USDC on Base
- —Integrating pay-per-use API access into autonomous agent workflows
Fit
Best for
- —Developers wanting zero-friction API access without signup
- —Agents or bots that need programmatic pay-per-call endpoints
- —Users who prefer crypto micropayments over traditional billing
Not for
- —Users needing detailed API documentation or OpenAPI schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/79 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific endpoint '/api/v1/transfers/79' has no documentation, no request/response schema, and no examples. The docs, pricing, and README pages all returned only 'Connect wallet' with no useful content. The purpose of this particular 'transfers/79' endpoint is entirely opaque.
Warnings
- —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.
- —The specific endpoint /api/v1/transfers/79 ('Premium API Access') is not listed among the 16 endpoints on the landing page, making its purpose unclear.
- —No request or response schemas are available for any endpoint.
- —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none have verifiable documentation or examples.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/transfers/79 advertises maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/transfers/79
- —The platform lists 16 endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com