# Microsoft 365 Copilot Extensibility API

**Canonical:** https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-extensibility-api/  
**Provider:** Microsoft 365 Copilot — https://apis.io/providers/microsoft-365-copilot/  
**Base URL:** https://api.microsoft365.com/copilot/v1  
**Documentation:** https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/

Microsoft 365 Copilot Extensibility API is one of 7 APIs that [Microsoft 365 Copilot](https://apis.io/providers/microsoft-365-copilot/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Custom Skills, Extensibility, Integration, and Plugins. The published artifact set on APIs.io includes API documentation.

API for extending Microsoft 365 Copilot with custom skills, plugins, and connectors to integrate third-party services and enterprise data sources.

## Machine-readable artifacts (5)

- **Documentation** — https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/
- **Plugin Manifest** — https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/create-plugin
- **Teams Message Extensions** — https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/build-message-extensions
- **API Plugins** — https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/api-plugins
- **Samples** — https://github.com/microsoft/copilot-plugins-samples

## Other Microsoft 365 Copilot APIs (6)

- [Microsoft Copilot Studio API](https://apis.io/apis/microsoft-365-copilot/microsoft-copilot-studio-api/)
- [Azure OpenAI Service API](https://apis.io/apis/microsoft-365-copilot/azure-openai-service-api/)
- [Microsoft 365 Copilot Connectors API](https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-connectors-api/)
- [Microsoft 365 Copilot External Items API](https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-external-items-api/)
- [Microsoft 365 Copilot Search API](https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-search-api/)
- [Microsoft 365 Copilot User Content API](https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-user-content-api/)

## Tags

Custom Skills, Extensibility, Integration, Plugins

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/microsoft-365-copilot/microsoft-365-copilot-extensibility-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/microsoft-365-copilot/.