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 variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or commitments are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/accounts/134` is listed as "Premium API Access" and returns `application/json`. Its x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and is discoverable.
The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 per call. Documentation pages (docs, pricing, README) appear to require wallet connection and contain no substantive content in the crawl, so the actual request/response schemas for this specific endpoint are unknown.
Capabilities
Use cases
- —Accessing premium API data with per-request USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Pay-as-you-go access to analytics, AI, finance, and utility endpoints
Fit
Best for
- —Developers wanting zero-commitment, pay-per-use API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost API calls without subscription overhead
Not for
- —Users who need detailed API documentation or OpenAPI schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/134 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and the docs/pricing/README pages are all gated behind wallet connection with no crawlable content. The purpose of this specific '/accounts/134' endpoint is unclear beyond the generic 'Premium API Access' label.
Warnings
- —No OpenAPI or request/response schema available for this endpoint
- —Documentation, pricing, and README pages require wallet connection and have no crawlable content
- —The specific purpose of /api/v1/accounts/134 is not documented — 'Premium API Access' is vague
- —This endpoint is not listed among the advertised APIs on the homepage, making its function unclear
Citations
- —All endpoints are priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —Payment is settled in USDC on the Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/accounts/134
- —The platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com