Developers

First Chair offers a public, read-only API for AI assistants and partners: find vacation homes, price a stay with the same quote the checkout uses, and hand the traveler a reservation link with the stay filled in. It cannot hold, book or take payment; the traveler books on firstchair.com.

Start here

OpenAPI 3.1 description · API index (JSON) · llms.txt · API catalog (RFC 9727)

Base address: https://www.firstchair.com/api/agent/v1. No key is needed. Dates are YYYY-MM-DD; prices are US dollars.

A stay in one call

GET https://www.firstchair.com/api/agent/v1/find?place=steamboat&check_in=2026-11-25&check_out=2026-11-29&adults=4

Each home comes back with its id, bedrooms, sleeps, rating, nearest lift and book_at, the reservation page with the dates and party filled in. The first six homes shown carry the live checkout price.

The price contract

If stay.price is "live", stay.total is what the checkout charges at stay.as_of and book_at is ready for the traveler: no further call is needed. If it is "indicative", call quotebefore stating a final price. Nightly rates and totals include all fees and match the home's page; taxes are added at checkout.

Calls

find   ?place=&check_in=&check_out=&adults=&children=&pets=&min_bedrooms=&max_total=&near_lifts=&limit=&page=
quote  ?home_id=&check_in=&check_out=&adults=&children=&pets=
home   ?home_id=
terms  ?home_id=
link   ?home_id=&check_in=&check_out=&adults=&children=&pets=
ask    ?question=   (a trip question in plain words)

In the browser: WebMCP

Every page registers the same calls as WebMCP tools (find_homes, quote_stay, get_home, get_terms, reservation_link), so an assistant working in a visitor's Chrome can call them directly. All are read-only.

Also

Every home, destination and guide answers in Markdown: add .md to its address, or send Accept: text/markdown. The /api/catalog/*routes the site's own pages call are internal and may change; build on /api/agent/v1.

Questions: contact First Chair.