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 set 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 commitments required. The x402 protocol handles payment inline: callers attach a payment header to each HTTP request, and the server fulfills the call once payment is verified.
The specific endpoint at `/api/v1/orders/60` is listed as "Premium API Access" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
The broader platform advertises endpoints in four categories: 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 (geocoding, validation, conversion, generation). All are priced identically at $0.02 per call. Documentation beyond the landing page is sparse — the docs, API, pricing, and README pages all appear to require a wallet connection and contain no rendered content.
Capabilities
Use cases
- —Accessing AI inference (sentiment, summarization, classification, embeddings) on a per-call basis without API keys
- —Fetching real-time crypto token quotes and gas estimates via micropayment
- —Running geocoding or data validation utilities with no subscription commitment
- —Exporting analytics data or generating reports with pay-as-you-go pricing
Fit
Best for
- —Developers who want instant API access without signup or API key management
- —Agents and bots that can settle USDC payments on Base per request
- —Low-volume or bursty workloads where subscription pricing is wasteful
Not for
- —High-volume production workloads where per-call pricing at $0.02 adds up quickly
- —Users who cannot transact in USDC on the Base network
- —Anyone needing detailed documentation or SLA guarantees — docs are currently minimal
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/60 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, and the landing page describes the platform's offerings and pricing. However, there is no OpenAPI schema, no documentation content (all doc pages just show 'Connect wallet'), no example request/response bodies, and the specific purpose of `/api/v1/orders/60` ('Premium API Access') is unclear. This is effectively a stub listing with confirmed liveness but minimal technical detail.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) render no content without a connected wallet — no public docs available.
- —The specific purpose and request/response schema of /api/v1/orders/60 ('Premium API Access') is undocumented and unclear.
- —No OpenAPI spec or machine-readable schema is provided.
- —The platform lists many endpoint categories but none have documented input/output schemas.
Citations
- —All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge for /api/v1/orders/60 requests maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.https://lowpaymentfee.com/api/v1/orders/60
- —Platform offers endpoints in Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com