Pay-per-call API suite on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. Every endpoint is priced at $0.02 per request, settled in USDC on the Base network. There are no API keys, no rate limits, and no sign-up — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/generate/resource/200` is listed as "Premium API Access" and returns `application/json`. The x402 challenge advertises a maxAmountRequired of 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, payable to address 0x1A2B…85F3.
Documentation beyond the landing page is extremely thin — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The exact functionality of the `/api/v1/generate/resource/200` endpoint is unclear from the available material; it may be a generic resource-generation or test endpoint. Agents should treat this listing with caution until richer documentation surfaces.
Capabilities
Use cases
- —Agents needing on-demand API calls without pre-registration or API keys
- —Micropayment-gated data retrieval for analytics or finance workflows
- —AI inference (sentiment, summarization, classification, embeddings) paid per call
- —Utility operations like geocoding, validation, or data conversion
Fit
Best for
- —AI agents that can settle x402 payments in USDC on Base
- —Developers wanting zero-signup, pay-as-you-go API access
- —Low-volume or bursty workloads where per-request pricing is economical
Not for
- —High-volume production workloads needing SLAs or guaranteed uptime
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Callers who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/200 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and the exact purpose of this specific endpoint is ambiguous. Docs pages all return only 'Connect wallet' with no content.
Warnings
- —No OpenAPI or schema documentation available — endpoint behavior must be discovered empirically.
- —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no useful content.
- —The exact functionality of /api/v1/generate/resource/200 is unclear; 'Premium API Access' is a generic label.
- —No examples of request or response payloads are available from the crawl.
Citations
- —Endpoint returns 402 with x402 challenge advertising maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/generate/resource/200
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/generate/resource/200
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com