Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/messages/96` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, accounts, or subscriptions are required; callers attach an X-PAYMENT header with a signed USDC payment on Base.
The wider platform advertises four endpoint 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 endpoints are listed at the same $0.02 per request price point.
Important caveat: the `/api/v1/messages/96` endpoint's actual functionality is not documented beyond the label "Premium API Access." There is no OpenAPI schema, no request/response examples, and the crawled docs pages (pricing, README, API) returned only a wallet-connect prompt with no additional content. Prospective callers should be aware that the concrete behavior of this endpoint is unknown from available documentation.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without needing an account or API key
- —Agent-driven workflows that settle per-request costs in USDC on Base
- —Exploring x402 protocol integration with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, per-call API access on Base
- —Low-cost micropayment API consumption without subscriptions
Not for
- —Users who need detailed API documentation and schemas before integrating
- —High-throughput use cases where per-call crypto settlement adds latency
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/messages/96 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge), but there is no OpenAPI schema, no request/response examples, and no documentation explaining what /api/v1/messages/96 actually does. The crawled pages beyond the landing page returned only wallet-connect prompts. This is effectively a stub listing with confirmed liveness but unknown functionality.
Warnings
- —No OpenAPI or schema available — endpoint behavior is entirely undocumented
- —The specific endpoint /api/v1/messages/96 is not listed among the catalog on the homepage; its purpose is unclear
- —Docs, pricing, and README pages returned no useful content (only wallet-connect prompts)
- —No request or response examples available anywhere in crawled material
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/messages/96
- —All listed endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/messages/96