Crexi API
Crexi's only official API is the Listing API, a one-way feed for pushing listings in via RESO, RETS, or XML, scoped to MLSs, large brokerages, and data providers. Onboarding needs a signed agreement with integrations@crexi.com. Leads, comps, and Intelligence data stay portal-only.
Frequently asked questions
Crexi scores B+ on the API Report Card. Crexi's only official API is the Listing API, a one-way feed for pushing listings in via RESO, RETS, or XML, scoped to MLSs, large brokerages, and data providers. Onboarding needs a signed agreement with integrations@crexi.com. Leads, comps, and Intelligence data stay portal-only.
Crexi has a workable official integration path. Most engineering teams can build against it directly. Solid API with minor gaps
Crexi (Commercial Real Estate Exchange, Inc.) is a commercial real estate technology platform founded in 2015 and headquartered in Playa Vista, California.
Real Estate, specifically commercial real estate marketing, transaction management, and CRE market intelligence. CRE brokers use Crexi Marketplace daily-to-weekly to post and refresh for-sale and for-lease listings, manage premium tile placements, respond to inbound buyer/tenant inquiries (Listing PRO / Lease PRO contact unlock), build branded broker profiles, run themed email campaigns, and pull view/lead analytics.
High and rising in U.S. commercial real estate; not yet at LoopNet/CoStar scale but the clear #2 marketplace and the fastest-growing CRE data platform.
For brokers and owners with active paid Crexi subscriptions, the platform holds their live for-sale and for-lease inventory and marketing presence, listing photos, floor plans, OMs and marketing copy, pricing and availability, ad-package/PRO tier and spend, broker contact assignment, inbound buyer/tenant inquiry history, view and impression analytics, and (for auction users) bidder qualification state, bid history, and timed-auction outcomes.
Modern, cloud-native CRE SaaS founded in 2015, Crexi is the youngest serious competitor in the U.S. CRE marketplace/intelligence stack and was deliberately architected to be a tech-forward challenger to LoopNet's legacy product surface and CoStar's 1980s research-heavy data moat.
The Crexi Listing API is inbound-only, it lets you push listings into Crexi but offers no way to pull your own listings, leads, comps, or analytics back out. The Listing API is gated to large data partners (MLS, Realtor Associations, large brokerages, data providers); individual brokers and PRO subscribers cannot use it. Full sourced list under Sources below.
Common alternatives include LoopNet (CoStar Group), CoStar Suite, Reonomy (Altus Group), CompStak, CommercialEdge (Yardi), CommercialSearch (Yardi). Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.