Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/wire/119` is listed as "Premium API Access" with a maximum payment of 20,000 base units of USDC (0.02 USDC = $0.02). It accepts POST requests and returns application/json. Payment is made via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required. The x402 challenge was confirmed live, returning a proper 402 response with payment parameters.
Documentation is extremely sparse. 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 description of what this particular wire/119 endpoint actually returns. The site's landing page lists many endpoints but does not clarify what `/api/v1/wire/119` specifically does versus the named endpoints. Prospective users should be aware that without documentation, the actual functionality behind this endpoint is unknown.
Capabilities
Use cases
- —Paying per-request for API access without subscriptions or API keys
- —Programmatic agent-driven API consumption settled in USDC on Base
- —Accessing data, AI, finance, or utility endpoints with crypto micropayments
Fit
Best for
- —Developers wanting zero-commitment pay-per-use API access
- —AI agents that can settle x402 payments autonomously
- —Users who prefer crypto-native billing over traditional API key models
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Applications requiring guaranteed SLAs or support contracts
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/119 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of /api/v1/wire/119 is completely undocumented. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —The specific functionality of /api/v1/wire/119 ('Premium API Access') is not described anywhere
- —No OpenAPI schema or request/response examples provided
- —No information on what input the POST endpoint expects or what it returns
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (0.02 USD) on Basehttps://lowpaymentfee.com/api/v1/wire/119
- —Site lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs