agentrxi.com x402 offerings

Find air quality monitoring stations that are reporting now, near a place or across a country: name, operator, reference-grade flag, coordinates, distance, pollutants measured and last reading time.

Air quality near any place from nearby monitoring stations (OpenAQ): PM2.5, PM10, ozone, NO2 and more, with a US AQI and health category.

Verify an email address: syntax check, domain MX lookup, disposable-domain and role-account flags. Use before sending or storing an address.

Shared answer cache: a recent cited answer to a question similar to yours (from /v1/answer) for a quarter of the price. Not charged when nothing close enough is cached.

Ask a document: give a web page, PDF, Word, Excel or CSV URL (or raw text) and a question; get an answer backed by exact quotes from the document. Long documents are searched with embeddings first. Also callable as GET with the same fields as query parameters.

OpenAI-compatible speech to text (Whisper large v3 turbo): multipart file upload exactly like OpenAI /v1/audio/transcriptions, with response_format json, text, srt, vtt or verbose_json. Also accepts a public audio url. Up to 20 MB, flat price, no API key. Also callable as GET with the same fields as query parameters.

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

Cited answers: ask a question, get a concise answer written from live web pages with numbered [n] citations and the source list. Searches the web, reads the top pages and writes only from what they say (gpt-oss-120b).