Pay-per-call API platform on Base via x402 — $0.02/request for data, AI, finance, and utility endpoints.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request 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, paid in USDC on the Base network via the x402 protocol.
The specific endpoint at `/api/v1/wire/174` is listed as "Premium API Access" with a max amount of 20,000 base units of USDC (0.02 USDC = $0.02), consistent with the site-wide pricing. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are advertised. The platform accepts POST requests and returns JSON responses.
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 detailed documentation for any endpoint. It is unclear what specific functionality the `/api/v1/wire/174` endpoint provides beyond the generic "Premium API Access" label, and the relationship between this wire endpoint and the named API endpoints listed on the homepage is not documented.
Capabilities
Use cases
- —Agent-driven data retrieval with per-call crypto payments and no API key management
- —On-demand AI inference (sentiment, summarization, classification, embeddings) at $0.02/call
- —Fetching real-time financial data (prices, exchange rates, gas estimates) without subscriptions
- —Utility operations like geocoding, validation, and data conversion via micropayments
Fit
Best for
- —Developers or agents wanting zero-signup, pay-as-you-go API access
- —Low-volume or bursty workloads where per-call pricing is more economical than subscriptions
- —x402-compatible agents that can settle USDC payments on Base automatically
Not for
- —High-volume production workloads where per-call costs would accumulate significantly
- —Users who need detailed API documentation, SLAs, or guaranteed uptime
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/174 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/wire/174 is undefined beyond a generic label. The broad catalog of endpoints listed on the homepage cannot be verified for functionality.
Warnings
- —No documentation available — all doc/pricing/API/README pages render only 'Connect wallet'
- —The specific endpoint /api/v1/wire/174 has no description beyond 'Premium API Access'; its actual functionality is unknown
- —No OpenAPI schema or request/response examples are provided
- —No information about rate limits, uptime guarantees, or data sources
- —Relationship between /api/v1/wire/174 and the named endpoints on the homepage is unclear
Citations
- —All endpoints priced at $0.02 per request with no minimums or commitmentshttps://lowpaymentfee.com
- —Payment in USDC on Base network, no API keys requiredhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units (0.02 USDC) for /api/v1/wire/174https://lowpaymentfee.com/api/v1/wire/174
- —Categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages show only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs