Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no subscriptions required.
The specific endpoint at `/api/v1/orders/87` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) on Base. The platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 price point.
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 spec, no request/response schema documentation, and no example payloads available. The actual functionality behind this specific `/api/v1/orders/87` endpoint is unclear — the description simply says "Premium API Access" without specifying what data or service it returns. Prospective users should be aware that without documentation, the behavior of each endpoint must be discovered experimentally.
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time crypto token quotes and gas estimates on a per-request basis
- —Running geocoding or data validation calls with instant USDC micropayments
- —Exporting data or generating analytics reports without subscription commitments
Fit
Best for
- —Developers who want zero-friction API access without signup or API keys
- —Agents and bots that can settle x402 payments in USDC on Base
- —Low-volume or experimental use cases where per-call pricing is preferable to subscriptions
Not for
- —High-volume production workloads where subscription pricing would be cheaper
- —Users who need detailed API documentation, SLAs, or guaranteed uptime
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/87 \
-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 it accepts USDC on Base at $0.02. However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response examples, and the purpose of this specific endpoint (/api/v1/orders/87) is unclear beyond the generic label 'Premium API Access'.
Warnings
- —No API documentation available — all doc pages render only 'Connect wallet'
- —The specific purpose of /api/v1/orders/87 ('Premium API Access') is not explained anywhere
- —No OpenAPI spec or request/response schema provided
- —No examples of successful responses available
- —The broad catalog of endpoints (AI, finance, utils) is advertised but none are individually documented
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/orders/87 requests maxAmountRequired of 20000 base units of USDC (USD Coin) on Basehttps://lowpaymentfee.com/api/v1/orders/87
- —Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/orders/87