No. As of September 2026 Claude cannot connect to CoStar: there is no CoStar connector, and CoStar's public Terms of Use, last revised July 6, 2026, bar sharing passcodes with AI agents, scraping, and using CoStar data as input to generative AI or retrieval-augmented generation. The same limits apply to ChatGPT. Automate the work around CoStar with your own systems and public records.
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Why is there no CoStar connector in Claude?
Open Customize > Connectors and search for CoStar. It is not there, because CoStar's terms keep its licensed data out of outside AI tools and a connector would contradict them. Teams ask because they already pay for CoStar and want comps without pasting screens into a chat.
What do CoStar's terms actually prohibit?
CoStar's public Terms of Use, last revised July 6, 2026, rule out three shortcuts. This is not legal advice; your signed license governs your account.
- Sharing the login with an AI agent. Passcodes may not be shared with third-party AI services, including AI agents. The terms also let CoStar raise fees for additional users it detects.
- Scraping. Scraping, data mining, robots, spiders and extraction tools are prohibited. A "connector" that signs in as a user and reads the screens is exactly this.
- Exporting a slice into Claude. You may not expose the licensed product to AI tools outside CoStar, or use data generated from it to train an AI system or as input to generative AI or retrieval-augmented generation.
What should a CRE team connect instead?
| What the team wants | Path that is allowed |
|---|---|
| Comparable sales | County deed and property appraiser records through a custom connector, plus your own closed deals. |
| Who owns a building | The county roll for the owner of record, then the state corporate registry for the people behind the LLC. In Florida that is Sunbiz. |
| Market data in Claude | A vendor that licenses it for AI use and ships a connector, such as Yardi Matrix for multifamily. |
| Underwriting | A Skill built on the OM, your rent roll and your criteria. |
| A CoStar market report | Read it in CoStar. Write your own conclusions into the memo. |
Start with systems you own: the CRM, Yardi and the files on disk. That is connectors work. Run file work in Cowork and recurring research on scheduled tasks. For Florida property, our county records connector answers ownership and comps questions from public record, each figure naming its source file and date. Someone still opens CoStar when they need CoStar.
Common questions
Is there an official CoStar connector for Claude?
No. As of September 2026 CoStar is not in Claude's connector directory and has not announced a Claude connector. The directory changes often, so check Customize > Connectors before relying on this.
Can I paste a CoStar export into Claude?
CoStar's public Terms of Use say you may not expose the licensed product to AI tools outside CoStar or use data generated from it as input to generative AI or retrieval-augmented generation. Your signed license governs your account, so read it before you do this.
What can Claude use for comps instead of CoStar?
Public records such as county property appraiser and deed data, your own closed deals and rent rolls, and market data from vendors whose license allows AI use. Yardi, for example, publishes a Claude connector for its Yardi Matrix market data.