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feat: include data in JSON-RPC error response (#774) #1031

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feat: include data in JSON-RPC error response (#774) #1031

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@matiasedgeandnode matiasedgeandnode commented Oct 16, 2025 •
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Motivation and Context

Fixes #774

How Has This Been Tested?

I've added 3 tests.

Breaking Changes

None

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation update

Checklist

  • I have read the MCP Documentation
  • My code follows the repository's style guidelines
  • New and existing tests pass locally
  • I have added appropriate error handling
  • I have added or updated documentation as needed

@matiasedgeandnode matiasedgeandnode requested a review from a team as a code owner October 16, 2025 17:08
@felixweinberger felixweinberger mentioned this pull request Oct 17, 2025
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@KKonstantinov
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Detailed errors are important for production readiness, I'd vote for PRs like this to get priority.

@felixweinberger felixweinberger self-assigned this Oct 21, 2025
@felixweinberger felixweinberger added the needs maintainer action Potentially serious issue - needs proactive fix and maintainer attention label Oct 21, 2025
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needs maintainer action Potentially serious issue - needs proactive fix and maintainer attention

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Successfully merging this pull request may close these issues.

[Feature Request] Include McpError 'data' payload in JSON-RPC error response

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@matiasedgeandnode @KKonstantinov @felixweinberger