fix: add header normalization middleware to resolve Mixed Auth publis…#188
Open
ArsalanShakil wants to merge 1 commit intoopenai:mainfrom
Open
fix: add header normalization middleware to resolve Mixed Auth publis…#188ArsalanShakil wants to merge 1 commit intoopenai:mainfrom
ArsalanShakil wants to merge 1 commit intoopenai:mainfrom
Conversation
…hing errors Resolves openai#183 The MCP SDK strictly validates Content-Type and Accept headers, rejecting: - Content-Type: text/octet-stream (returns 400 Bad Request) - Accept: */* (returns 406 Not Acceptable) This caused app publishing to fail when using Mixed Auth mode because the OpenAI platform sends POST /mcp requests with non-standard headers during tool scanning. This commit adds an ASGI middleware (MCPHeaderNormalizationMiddleware) to all Python servers that normalizes headers before they reach the MCP SDK: - Rewrites text/octet-stream to application/json - Adds explicit application/json to wildcard Accept headers - Adds default Content-Type and Accept headers when missing
Scandidim
approved these changes
Feb 10, 2026
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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
…hing errors
Resolves #183
The MCP SDK strictly validates Content-Type and Accept headers, rejecting:
This caused app publishing to fail when using Mixed Auth mode because the OpenAI platform sends POST /mcp requests with non-standard headers during tool scanning.
This commit adds an ASGI middleware (MCPHeaderNormalizationMiddleware) to all Python servers that normalizes headers before they reach the MCP SDK: