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 catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no subscriptions required. The specific endpoint at `/api/v1/generate/resource/130` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call.
The 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). All endpoints share the same $0.02 per-request pricing.
Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The exact functionality behind the `/api/v1/generate/resource/130` path (labeled "Premium API Access") is unclear; it does not map obviously to any of the named endpoints on the landing page. Agents should treat this as a low-documentation endpoint until more detail is published.
Capabilities
Use cases
- —Programmatic access to utility or generation endpoints without managing API keys
- —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
- —Testing x402 payment flows against a low-cost live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —AI agents that can autonomously pay for API calls via Base USDC
- —Use cases requiring keyless, pay-as-you-go API access
Not for
- —Production workloads requiring well-documented request/response schemas
- —Users who need fiat-only payment options (endpoint requires on-chain USDC on Base)
- —Applications needing guaranteed SLAs or support contracts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/130 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/generate/resource/130",
"body": {},
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-payment-header>",
"Content-Type": "application/json"
}
}Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing, but there is zero documentation on what the endpoint actually does, no request/response schemas, and no examples. The /docs and other pages are empty. The 'Premium API Access' label is generic and does not describe functionality.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema definition found for any endpoint.
- —The specific resource path /api/v1/generate/resource/130 does not correspond to any named endpoint on the landing page; its actual functionality is unknown.
- —Response format and fields are entirely undocumented.
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge for resource/130 requests maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.https://lowpaymentfee.com/api/v1/generate/resource/130
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com