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 catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/generate/resource/150` is listed under "Premium API Access" and accepts POST requests with payment via the x402 protocol. The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access.
The platform organizes its APIs into 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 (geocoding, validation, conversion, generation). All endpoints use the same x402 payment flow on Base with USDC (contract 0x8335…2913).
The probed endpoint returned a valid 402 challenge with a maxAmountRequired of 20000 base units. Since USDC uses 6 decimals, this equates to $0.02, consistent with the site's advertised pricing. Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for this endpoint are unknown.
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time financial data like token quotes, exchange rates, and gas estimates on a per-call basis
- —Running data analytics queries and exporting data with per-request billing
- —Using utility services like geocoding, validation, and conversion with no subscription commitment
Fit
Best for
- —Agents or developers who want zero-signup, pay-as-you-go API access
- —Use cases requiring low-cost micropayments per API call ($0.02)
- —Projects already operating on the Base network with USDC
Not for
- —Users who need detailed API documentation or well-defined request/response schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription discounts
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/150 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and all doc pages return only 'Connect wallet'. The actual functionality behind 'Premium API Access' at /api/v1/generate/resource/150 is entirely opaque.
Warnings
- —No documentation available — all doc pages (/docs, /pricing, /api, /README) return only 'Connect wallet' with no content
- —No OpenAPI or schema definition found for any endpoint
- —The actual input parameters and response format for /api/v1/generate/resource/150 are unknown
- —The specific functionality of 'Premium API Access' is not described anywhere beyond the generic title
Citations
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/generate/resource/150
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/generate/resource/150
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com