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 set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/policies/34` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
The broader 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). Documentation pages exist but appear gated behind a wallet connection, so detailed request/response schemas for individual endpoints are not available from the crawl.
Capabilities
Use cases
- —Agents that need on-demand access to analytics, AI inference, or financial data without managing API keys or subscriptions
- —Programmatic access to sentiment analysis, text summarization, or classification at $0.02 per call
- —Fetching real-time crypto gas estimates or token quotes with instant x402 payment
- —Geocoding or data validation as a utility microservice paid per request
Fit
Best for
- —AI agents and bots that can settle x402 payments in USDC on Base
- —Developers wanting zero-commitment, pay-as-you-go API access
- —Use cases requiring low-cost micropayments per API call without signup
Not for
- —Users who need free or subscription-based API access without crypto wallets
- —High-volume batch workloads where per-request pricing at $0.02 adds up significantly
- —Applications requiring detailed SLAs or guaranteed uptime commitments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, documentation pages are gated behind wallet connection, yielding no request/response schemas, no OpenAPI spec, and no concrete examples of what /api/v1/policies/34 actually returns. The endpoint name 'Premium API Access' is generic and its specific functionality is unknown.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) all appear gated behind wallet connection — no usable docs were retrieved.
- —The specific purpose of /api/v1/policies/34 ('Premium API Access') is unclear; it does not match any of the named endpoints on the landing page.
- —No OpenAPI spec or request/response schema available — callers must guess at the expected POST body and response format.
- —No information on uptime guarantees, error handling, or data freshness.
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 Basehttps://lowpaymentfee.com/api/v1/policies/34
- —Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categorieshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/policies/34