Need assistance for copilot integration

Question

Need assistance for copilot integration

Chandra prakash reddy Sreelam 0

We are currently working on integrating Microsoft 365 Copilot into our internal workflows. We would like assistance with REST API-Based Integration.

Question:

Is REST API integration the only supported method for connecting external systems to Microsoft 365 Copilot, or are there alternative that might simplify integration?

We are open to exploring other supported options if they offer faster implementation or richer features.

2 answers

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Answer 1

smita-MSFT 75 Microsoft External Staff

Hello Chandra prakash reddy Sreelam ,Thanks for raising your issue. Could you please try to enable declarative agents to interact with REST APIs that have an OpenAPI description.
Ref: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/overview-api-plugins ?

Also try to add REST APIs to Copilot agents and custom agents through Copilot Studio.
Ref: https://learn.microsoft.com/en-us/microsoft-copilot-studio/agent-extend-action-rest-api & connect a REST API to Microsoft 365 Copilot using the Teams Toolkit. https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/build-api-plugins-new-api

Extensibility Options: Overview of extensibility options, including declarative agents and custom engine agents. Explore https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/decision-guide

If the response is helpful, please click on "upvote" button. You can share your feedback via Microsoft Copilot Developer Feedback link. Click here to escalate.

Sonam Kumari 0 Reputation points

2025-04-07T05:03:03.9833333+00:00
Hi Smita,

Thanks again for the helpful resources!

We’re building an internal application using the Mendix low-code platform, and we’re exposing REST APIs to allow integration with Microsoft 365 Copilot. Our goal is for users to interact with Copilot to query data or trigger workflows via natural language.

We’d like to understand:

How Copilot consumes external REST APIs — once published, how are these APIs connected or registered with Copilot?

How Copilot provides responses — in what format does it return data from external APIs (e.g., plain text, JSON)?

How those responses can be consumed back in applications — if we want Mendix to process Copilot’s response, is that supported?

Authentication support — does Copilot support calling secured APIs (e.g., OAuth2)?

Any sample implementations or documentation that outline this flow.

We’re ready to proceed with REST integration and just need technical clarity on how Copilot handles responses and supports consumption by external apps.

Best regards,

Sonam
smita-MSFT 75 Reputation points Microsoft External Staff

2025-04-07T07:01:49.31+00:00

Hi Sonam Kumari

1.Copilot can interact with external REST APIs through API plugins. These plugins require an OpenAPI description document and a plugin manifest that Copilot uses to understand the capabilities of the API. You can create custom connectors using Copilot Studio, which allows you to integrate various APIs seamlessly.
Ref: https://learn.microsoft.com/en-us/microsoft-copilot-studio/agent-extend-action-rest-api

2.Copilot returns data from external APIs in the format specified by the API, typically JSON. The responses are then processed and presented to the user in a conversational manner.
Ref: https://learn.microsoft.com/en-us/microsoft-copilot-studio/agent-extend-action-rest-api

3.Yes, Mendix can process Copilot's responses. Once Copilot retrieves data from the API, it can be formatted and sent back to your application for further processing.

4.Copilot supports calling secured APIs, including OAuth2. You can configure authentication using Microsoft ID and define the scope for accessing the Graph API. You can refer to the official documentation here: Microsoft identity platform and OAuth 2.0 authorization code flow.

5.For detailed guidance on integrating REST APIs with Copilot, you can refer to the official documentation on API plugins, extending agents with REST API actions, and building API plugins with new APIs.
Ref: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/overview-api-plugins

Thanks,
Smita

If the response is helpful, please click on "upvote" button. You can share your feedback via Microsoft Copilot Developer Feedback link. Click here to escalate.

Answer 2

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Need assistance for copilot integration

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