---
title: "Aireon Developers"
description: "Swiss parcel, building and valuation data for developers and AI agents."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.aireon.ch/llms.txt
> Use this file to discover all available pages before exploring further.

# Aireon Developers

Aireon serves data on every Swiss parcel, keyed by its EGRID: zoning, buildings, location scores, GWR records, OEREB documents and valuations. Use it over REST or from an AI assistant through MCP.

- **Quickstart**: Find a parcel and value it in two calls, no token.
- **Authentication**: Which endpoints are open and how to get access to the rest.
- **aireon-mcp**: Connect Claude, ChatGPT or Gemini to Aireon data.
- **RES API reference**: Parcels, buildings, zoning, scores and GWR.
- **revenoo API reference**: Income-property and land valuation by EGRID.

## Machine-readable

- [llms.txt](/llms.txt) and [llms-full.txt](/llms-full.txt) index these pages for agents; append `/index.md` to any page URL for its Markdown.
- RES OpenAPI 3.1: [res.aireon.ch/api-docs/public/openapi.json](https://res.aireon.ch/api-docs/public/openapi.json)
- revenoo OpenAPI 3.1: [revenoo.aireon.ch/api/openapi](https://revenoo.aireon.ch/api/openapi)
- These docs over MCP: `https://docs.aireon.ch/mcp`

Source: https://docs.aireon.ch/index.mdx