Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/messages/82` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — callers authenticate and pay via the x402 protocol's `X-PAYMENT` header.
The platform advertises four categories of endpoints: 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 listed endpoints share the same $0.02/request pricing with no rate limits or minimum commitments.
The specific `/api/v1/messages/82` endpoint's purpose is not clearly documented beyond the generic "Premium API Access" label. It accepts HTTP POST requests and returns `application/json`. The payment is directed to wallet `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The x402 challenge confirms the endpoint is live and responding correctly.
Capabilities
Use cases
- —Accessing premium API content with per-request USDC micropayments on Base
- —Agent-driven workflows that need keyless, pay-as-you-go API access
- —Testing x402 protocol integrations with a low-cost live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —AI agents needing frictionless pay-per-call API access without credentials
- —Low-volume consumers who want no subscription or commitment
Not for
- —Users who need detailed documentation or OpenAPI schemas before integrating
- —High-volume production workloads where $0.02/request adds up significantly
- —Users without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/messages/82 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and no documentation explaining what /api/v1/messages/82 actually does. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —The specific purpose of /api/v1/messages/82 ('Premium API Access') is undocumented — it is unclear what data or functionality it provides.
- —No OpenAPI spec, request schema, or response schema is available.
- —Documentation pages (/api, /pricing, /README) returned no useful content beyond 'Connect wallet'.
- —The broad catalog of endpoints listed on the homepage could not be individually verified.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/messages/82
- —All listed endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/messages/82
- —Platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com