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 & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific endpoint at `/api/v1/accounts/24` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, which equals $0.02 per request (USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json. Payment is made via the x402 exact scheme with a 300-second timeout.
The broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so the actual functionality and response schemas of these endpoints remain unverified.
Capabilities
Use cases
- —Accessing premium API data without traditional API key registration
- —Making one-off API calls with instant USDC micropayments on Base
- —Integrating pay-per-use endpoints into agent workflows without subscription overhead
Fit
Best for
- —Developers who want frictionless pay-per-call API access without signup
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost, no-commitment API access
Not for
- —Users without a Base-compatible USDC wallet
- —High-volume consumers who need bulk pricing or subscription discounts
- —Anyone requiring detailed API documentation or guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/24 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, documentation pages are empty (only 'Connect wallet'), there is no OpenAPI schema, no example request/response bodies, and the actual functionality behind '/api/v1/accounts/24' ('Premium API Access') is completely undescribed. This is effectively a stub listing.
Warnings
- —Documentation pages (/docs, /pricing, /README) contain no substantive content — only a 'Connect wallet' prompt.
- —The actual functionality of /api/v1/accounts/24 ('Premium API Access') is not described anywhere; the endpoint purpose is unknown.
- —No OpenAPI schema or response schema is available, so request/response formats are unverified.
- —No examples of successful responses are available.
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base ($0.02)https://lowpaymentfee.com/api/v1/accounts/24
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/24
- —All listed endpoints are priced at $0.02/request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com