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 broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no upfront commitments. The specific endpoint at `/api/v1/transfers/76` is listed as "Premium API Access" and accepts POST requests settled via the x402 exact-payment scheme.
The platform advertises categories including 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 follow the same $0.02 pricing model.
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 usage examples available from the crawled material. The x402 challenge for this specific endpoint confirms it is live, accepting POST requests with USDC payment on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a max amount of 20000 base units (i.e., $0.02 given USDC's 6 decimals).
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) on a per-call basis without subscriptions
- —Fetching real-time financial data such as token quotes, exchange rates, and gas estimates
- —Running data analytics queries and exporting reports via pay-per-use endpoints
- —Using utility services like geocoding and validation without managing API keys
Fit
Best for
- —Agents or developers who want zero-setup, pay-as-you-go API access
- —Use cases requiring low-cost micropayments per request ($0.02)
- —Projects already operating on the Base network with USDC
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume use cases where per-request pricing may not be cost-effective compared to bulk plans
Quick start
# x402 POST to Premium API Access endpoint
curl -X POST https://lowpaymentfee.com/api/v1/transfers/76 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI spec, no request/response schema, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint (/api/v1/transfers/76) is unclear beyond the generic 'Premium API Access' label. Effectively a stub listing.
Warnings
- —No OpenAPI spec or request/response schema available
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —The specific purpose and expected input/output of /api/v1/transfers/76 is undocumented
- —The endpoint path '/transfers/76' suggests a resource-specific route but no context is provided for what transfer 76 represents
Citations
- —All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categorieshttps://lowpaymentfee.com
- —x402 challenge confirms USDC on Base with maxAmountRequired of 20000 base units ($0.02)https://lowpaymentfee.com/api/v1/transfers/76
- —Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 and asset is USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transfers/76