Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/93` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per call), consistent with the site's advertised $0.02/request pricing across all endpoints.
The broader platform advertises multiple API categories including 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 priced uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
However, the specific functionality behind `/api/v1/wire/93` is not documented — it does not correspond to any of the named endpoints listed on the site's landing page. There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. The actual capabilities of this particular endpoint remain unclear.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with per-call USDC micropayments
- —Agent-driven workflows that need keyless, on-demand API access settled on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —Agents that can settle USDC on Base for per-call API access
- —Low-volume, pay-as-you-go API consumption without signup
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume use cases where $0.02/request adds up significantly
- —Anyone needing clarity on what data or service this specific endpoint returns
Quick start
# This endpoint requires an x402 payment header (USDC on Base).
# 1. POST to the endpoint without payment to receive the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/wire/93
# 2. Parse the 402 response, construct an X-PAYMENT header with a signed USDC tx,
# then re-send the request with the header attached.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, the specific endpoint /api/v1/wire/93 is not documented anywhere on the site, there is no OpenAPI schema, no request/response examples, and all documentation pages render only a wallet-connect prompt. The actual functionality behind this endpoint is unknown.
Warnings
- —The endpoint path /api/v1/wire/93 does not match any of the documented API endpoints on the landing page — its actual functionality is unknown.
- —No OpenAPI schema, request format, or response examples are available.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no substantive content.
- —The platform appears to be early-stage or a demo; treat with caution.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals) on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/wire/93
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com
- —Documentation, pricing, API, and README pages all render only a 'Connect wallet' prompt.https://lowpaymentfee.com/docs