Add support for custom headers in HostedMcpServerTool #7053
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Introduces a Headers property to HostedMcpServerTool for specifying additional request headers. Updates OpenAIResponsesChatClient to pass these headers when creating MCP tools and adds unit tests to verify header roundtripping.
Contributor
There was a problem hiding this comment.
Pull Request Overview
This PR adds support for custom HTTP headers in HostedMcpServerTool, enabling users to specify additional request headers when communicating with remote MCP servers.
- Introduces a
Headersproperty of typeIDictionary<string, string>?to theHostedMcpServerToolclass - Updates
OpenAIResponsesChatClientto pass these headers to both variants ofResponseTool.CreateMcpTool() - Adds roundtrip tests to verify the Headers property can be set, retrieved, and cleared
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedMcpServerTool.cs | Adds the nullable Headers property with XML documentation |
| src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs | Passes mcpTool.Headers parameter to both CreateMcpTool overloads (URI-based and connector ID-based) |
| test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedMcpServerToolTests.cs | Adds assertions to verify Headers can be set to a dictionary, retrieved, and reset to null |
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedMcpServerToolTests.cs
Show resolved
Hide resolved
Author
|
@stephentoub any chance I can get an assignee on this one to help with getting it through? This is #7049 with the reverts. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Introduces a Headers property to HostedMcpServerTool for specifying additional request headers. Updates OpenAIResponsesChatClient to pass these headers when creating MCP tools and adds unit tests to verify header roundtripping.
Microsoft Reviewers: Open in CodeFlow