Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com offers a suite of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/generate/resource/99` is labeled "Premium API Access" and accepts POST requests. Payment is handled inline: callers attach an X-PAYMENT header with a signed USDC payment on Base, and the server fulfills the request once payment is verified. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request.
The provider's landing page lists 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 (geocoding, validation, conversion, generation). All are priced at $0.02 per request. The site advertises no API keys, no rate limits, and instant access.
Documentation is extremely thin — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The exact functionality behind the `/api/v1/generate/resource/99` path is unclear; the name "Premium API Access" and the path segment "generate" suggest some form of content or resource generation, but specifics are not documented.
Capabilities
Use cases
- —Agents needing on-demand API access without pre-registration or API keys
- —Paying per call for utility or generation endpoints using USDC on Base
- —Integrating x402-compatible payment flows into automated workflows
Fit
Best for
- —Developers or agents wanting zero-signup, pay-as-you-go API access
- —x402-native agent wallets on the Base network
- —Low-cost micropayment use cases at $0.02 per request
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch workloads where per-request pricing may add up without volume discounts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/99 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The actual functionality of this specific endpoint is undocumented, making it effectively a stub listing.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema describing request parameters or response format for this endpoint.
- —The exact purpose of /api/v1/generate/resource/99 ('Premium API Access') is not explained anywhere; functionality must be discovered by trial.
- —The broader site lists many endpoint categories (AI, finance, data, infrastructure) but none have documented schemas or examples.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/generate/resource/99
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The site lists four categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com
- —Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs