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/141` is listed as "Premium API Access" with a max amount of 20,000 base units of USDC (0.02 USDC = $0.02). It accepts POST requests and returns application/json. Payment is handled via the x402 exact scheme — callers attach an X-PAYMENT header with a signed payment to the payTo address. No API keys, rate limits, or upfront commitments are required; access is instant once payment is included.
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 spec, no request/response schema, and no description of what this particular wire/141 endpoint actually returns. The site's landing page confirms the pricing model and lists sibling endpoints, but the specific functionality behind `/api/v1/wire/141` is not documented.
Capabilities
Use cases
- —Accessing premium data or services with per-request USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to utility endpoints
Fit
Best for
- —Developers wanting zero-commitment, pay-per-use API access
- —AI agents that can settle x402 payments autonomously
- —Users already holding USDC on Base who want frictionless API calls
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone without USDC on Base or an x402-compatible payment client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/141 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/v1/wire/141 actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —The specific functionality of /api/v1/wire/141 ('Premium API Access') is completely undocumented; it is unclear what data or service it provides.
- —No OpenAPI spec or request/response schema is available.
- —No examples of request bodies or response payloads exist in the crawled material.
Citations
- —All endpoints priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —Payment settled in USDC on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units (0.02 USDC) for /api/v1/wire/141https://lowpaymentfee.com/api/v1/wire/141
- —Asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Basehttps://lowpaymentfee.com/api/v1/wire/141