Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that provides a broad suite of 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint at `/api/v1/generate/resource/120` is listed under "Premium API Access." The x402 challenge confirms it is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme with no API keys, no rate limits, and no upfront commitments — callers simply attach an X-PAYMENT header with a valid payment proof.
Documentation beyond the landing page is extremely sparse; the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The exact functionality of the `/api/v1/generate/resource/120` endpoint (what it generates, what input it expects, what it returns) is not documented anywhere in the crawled material.
Capabilities
Use cases
- —Programmatic access to utility/generation endpoints without API key management
- —Agent-driven workflows that need on-demand API calls settled in USDC
- —Exploring x402 payment protocol integration with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-use API access on Base
- —Low-cost micropayment API consumption without subscriptions
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-throughput production workloads where endpoint behavior is undocumented
- —Anyone without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/120 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI spec, no request/response examples, and no explanation of what the endpoint actually does beyond the generic label 'Premium API Access.' The docs, pricing, and README pages are all empty. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all return only 'Connect wallet' with no content
- —No OpenAPI or schema definition; request body and response format are completely unknown
- —The specific function of /api/v1/generate/resource/120 is undocumented — 'Premium API Access' is the only descriptor
- —No examples or sample responses available anywhere in crawled material
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge confirms the endpoint is live, accepting POST, with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/generate/resource/120
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) contain only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs