Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/accounts/46` is listed as "Premium API Access" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, 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 example payloads available for any endpoint, including this one.
Capabilities
Use cases
- —Accessing premium API data without needing to create an account or manage API keys
- —Making one-off API calls with instant USDC micropayments on Base
- —Integrating pay-per-use endpoints into autonomous agent workflows
Fit
Best for
- —Developers who want zero-friction API access without subscriptions
- —AI agents that can settle x402 payments autonomously
- —Users already holding USDC on the Base network
Not for
- —Users needing detailed API documentation or request/response schemas before integrating
- —High-volume callers who would benefit from bulk pricing or subscription plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/46 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI spec, no documentation of request parameters or response schemas, and no examples. The docs/pricing/README pages are all blank beyond a wallet connect prompt. The purpose of this specific endpoint (/api/v1/accounts/46) is unclear beyond the generic label 'Premium API Access'.
Warnings
- —No OpenAPI spec or schema documentation available for any endpoint
- —The docs, pricing, API, and README pages contain no usable content — only a 'Connect wallet' prompt
- —The specific purpose and expected input/output of /api/v1/accounts/46 is undocumented
- —Cannot verify what data or functionality this endpoint actually provides
Citations
- —All endpoints priced at $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, scheme exact, 300s timeouthttps://lowpaymentfee.com/api/v1/accounts/46
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com