Pay-per-call API suite on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com offers a collection of x402-enabled API endpoints spanning four categories: Data & Analytics (metrics, reports, 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 priced at $0.02 per request, paid in USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no upfront commitments required.
The specific endpoint at `/api/v1/wire/2` is listed as "Premium API Access" and accepts POST requests. Its 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. Payment is made via the `exact` scheme to the payTo address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout.
Documentation is extremely sparse — 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 examples of what the endpoints actually return. The landing page lists the endpoints and their prices but provides no detail on input parameters or output formats. As a result, it is unclear what `/api/v1/wire/2` specifically does or how it differs from the other listed endpoints.
Capabilities
Use cases
- —Accessing AI inference (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time crypto price feeds and gas estimates with per-call USDC payments
- —Running geocoding or data validation utilities on a pay-as-you-go basis
- —Exporting analytics data or generating reports without subscription commitments
Fit
Best for
- —Developers wanting zero-signup, pay-per-call API access via crypto
- —Agents or bots that can settle USDC payments on Base automatically
- —Users who need occasional API calls without rate limits or monthly plans
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription discounts
- —Developers who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/2 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of /api/v1/wire/2 specifically is undocumented. All non-landing pages return only 'Connect wallet' with no useful content.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README pages are all empty beyond a wallet connect prompt
- —No OpenAPI or schema definition; input parameters and response format for /api/v1/wire/2 are unknown
- —The purpose of the /api/v1/wire/2 endpoint is unclear — it is not listed among the named endpoints on the landing page
- —Cannot verify what data or service this endpoint actually provides
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/wire/2 advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/wire/2
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) render only a Connect wallet prompt with no further contenthttps://lowpaymentfee.com/docs