Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/34` is listed as "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live and requires up to 20,000 base units of USDC (0x8335…), which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader platform advertises multiple API categories including 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 listed at the same $0.02/request price point. However, the specific endpoint probed here (`/api/v1/wire/34`) does not map to any of the named endpoints on the landing page, and its actual functionality is unclear — the description is simply "Premium API Access" with no further documentation.
Documentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality `/api/v1/wire/34` actually returns. Callers should be aware that the endpoint's behavior is undocumented beyond its payment requirements.
Capabilities
Use cases
- —Programmatic access to an x402-gated endpoint paying $0.02 per request in USDC on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Testing x402 protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need keyless, pay-as-you-go API access on Base
- —Low-cost per-call API consumption settled in USDC
Not for
- —Users who need detailed documentation or guaranteed SLAs before calling
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of /api/v1/wire/34 is completely undocumented. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The specific endpoint /api/v1/wire/34 does not correspond to any named API on the landing page; its actual functionality is unknown.
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no substantive content.
- —No OpenAPI schema, request format, or response format is documented anywhere.
- —The platform lists many API categories but it is unclear whether they are all functional or placeholders.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/wire/34
- —All endpoints are listed at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform advertises Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /api, /pricing, /README) show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs