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 catalog 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, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.
The specific endpoint `/api/v1/accounts/150` 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 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The broader platform advertises additional endpoints across 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 utilities (geocoding, validation, conversion, generation). All are priced identically at $0.02 per request. Documentation pages exist but appear gated behind a wallet connection, so detailed request/response schemas are not publicly available.
Capabilities
Use cases
- —Accessing premium API data without creating an account or managing API keys
- —Making one-off paid API calls from autonomous agents using x402 protocol
- —Integrating pay-as-you-go data or AI endpoints into workflows settled on Base L2
Fit
Best for
- —Developers wanting zero-friction, keyless API access via crypto micropayments
- —AI agents that can autonomously pay for API calls using x402
- —Projects already operating on the Base network with USDC
Not for
- —Users who need detailed API documentation and schemas before integrating
- —Applications requiring free or subscription-based pricing models
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/150 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and settlement details. However, there is no OpenAPI schema, no request/response examples, and documentation pages are gated behind wallet connection. The purpose of the specific '/api/v1/accounts/150' endpoint is unclear beyond the generic label 'Premium API Access'. Effectively a stub listing.
Warnings
- —No public documentation available — all doc pages require wallet connection and show no content
- —The specific purpose and input/output schema of /api/v1/accounts/150 are unknown
- —No OpenAPI spec or example payloads are available
- —The platform lists many endpoints but none have documented schemas
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with 300s timeouthttps://lowpaymentfee.com/api/v1/accounts/150
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com