Pay-per-request API platform on Base via x402 — analytics, AI, finance, and utility endpoints at $0.02/call.
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/orders/46` is labeled "Premium API Access" and accepts POST requests with payment via the x402 protocol. The 402 challenge indicates a max amount of 20,000 base units of USDC (0.02 USD per request) on Base.
The broader 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 endpoints are listed 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 content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The specific functionality of the `/api/v1/orders/46` endpoint is unclear beyond its "Premium API Access" label, and it is not listed among the catalog endpoints on the homepage.
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time financial data such as token quotes, gas estimates, and exchange rates
- —Running analytics queries and data exports on a per-request payment basis
- —Using utility services like geocoding, validation, and data conversion
Fit
Best for
- —Agents or developers who want zero-signup, pay-per-call API access
- —Use cases requiring low-cost micropayments ($0.02/request) settled on-chain
- —Projects already operating on the Base network with USDC
Not for
- —Users needing detailed API documentation or OpenAPI specs before integration
- —High-volume use cases where per-request pricing may add up compared to subscription models
- —Users without a Base-compatible wallet or USDC holdings
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/46 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC payments on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The specific purpose of /api/v1/orders/46 is unclear and not listed in the site catalog. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema provided for any endpoint
- —The specific endpoint /api/v1/orders/46 ('Premium API Access') is not listed in the site's public API catalog — its purpose is unknown
- —No request or response examples available anywhere in the crawled material
- —The breadth of advertised capabilities (AI, finance, analytics, utilities) cannot be verified due to lack of documentation
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/orders/46
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/orders/46
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com