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/customers/62` is listed as "Premium API Access" and returns `application/json` via POST. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which has 6 decimals), equating to $0.02 per call. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The broader platform advertises endpoints for 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 price point. Documentation pages (docs, pricing, README) appear to require a wallet connection and contain no substantive content in the crawl. The exact functionality of the `/api/v1/customers/62` endpoint is unclear from available materials; the name "Premium API Access" is generic and no input/output schema details are provided beyond the x402 challenge metadata.
Capabilities
Use cases
- —Accessing premium data or customer records via a single pay-per-call request
- —Agent-driven API consumption without pre-registration or API key management
- —Programmatic access to various utility, AI, and finance endpoints at low per-request cost
Fit
Best for
- —AI agents needing frictionless, keyless API access
- —Developers who want pay-as-you-go pricing without subscriptions
- —Low-volume or bursty workloads where per-request billing is economical
Not for
- —High-volume production workloads where per-request fees add up quickly
- —Users who need detailed documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/62 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, and no explanation of what the /api/v1/customers/62 endpoint actually returns. The docs, pricing, and README pages are all behind a wallet-connect gate with no crawlable content.
Warnings
- —The exact purpose and response format of /api/v1/customers/62 is unknown — 'Premium API Access' is a generic label with no further documentation.
- —All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content.
- —No OpenAPI spec, input schema, or example responses are available.
- —The endpoint path '/api/v1/customers/62' suggests it may return customer-specific data; unclear if this is demo/sample data or a real resource.
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 (6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/customers/62
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/customers/62
- —Platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com