Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/wire/11` is listed as "Premium API Access" and accepts POST requests with x402 payment headers. The x402 challenge confirms it is live, requesting up to 20,000 base units of USDC (0.02 USD) per call via the "exact" payment scheme.
The platform advertises four categories of APIs: 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 listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The wire/11 endpoint's purpose is not explained beyond the generic "Premium API Access" label, making it unclear which specific service it provides.
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time financial data such as token quotes, exchange rates, and gas estimates
- —Running data analytics queries and exporting reports on a per-request payment basis
- —Using utility services like geocoding, validation, and data conversion with instant crypto settlement
Fit
Best for
- —Developers who want keyless, pay-per-use API access settled in USDC on Base
- —Agents and bots that can handle x402 payment flows natively
- —Low-volume or sporadic API consumers who prefer no subscriptions or commitments
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Developers who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of the /wire/11 endpoint is undefined. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — all doc pages return only 'Connect wallet'
- —The specific function of /api/v1/wire/11 ('Premium API Access') is not explained anywhere
- —No request or response examples are available from the provider
- —The broad API catalog listed on the homepage cannot be verified for actual functionality
Citations
- —The x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/11
- —All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs