# Copilot Studio Direct Line API

**Canonical:** https://apis.io/apis/microsoft-power-virtual-agents/direct-line-api/  
**Provider:** Microsoft Power Virtual Agents — https://apis.io/providers/microsoft-power-virtual-agents/  
**Base URL:** https://directline.botframework.com/  
**Documentation:** https://learn.microsoft.com/en-us/microsoft-copilot-studio/publication-connect-bot-to-custom-application

Copilot Studio Direct Line API is one of 4 APIs that [Microsoft Power Virtual Agents](https://apis.io/providers/microsoft-power-virtual-agents/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Chatbots, Conversational AI, and Direct Line. The published artifact set on APIs.io includes API documentation.

The Copilot Studio Direct Line API enables custom applications to communicate with bots built in Microsoft Copilot Studio (formerly Power Virtual Agents). It provides REST endpoints for starting conversations, sending messages, receiving bot responses, and managing conversation sessions for custom channel integrations.

## Machine-readable artifacts (2)

- **Documentation** — https://learn.microsoft.com/en-us/microsoft-copilot-studio/publication-connect-bot-to-custom-application
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/microsoft-power-virtual-agents/refs/heads/main/apis.yml

## Other Microsoft Power Virtual Agents APIs (3)

- [Copilot Studio Bot Management API](https://apis.io/apis/microsoft-power-virtual-agents/bot-management-api/)
- [Microsoft Power Virtual Agents Conversations API](https://apis.io/apis/microsoft-power-virtual-agents/microsoft-power-virtual-agents-conversations-api/)
- [Microsoft Power Virtual Agents Tokens API](https://apis.io/apis/microsoft-power-virtual-agents/microsoft-power-virtual-agents-tokens-api/)

## Tags

Chatbots, Conversational AI, Direct Line

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