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fix: default to allowing missing issuer#1051

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jamadeo/allow-missing-issuer-by-default
Open

fix: default to allowing missing issuer#1051
jamadeo wants to merge 1 commit into
mainfrom
jamadeo/allow-missing-issuer-by-default

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@jamadeo

@jamadeo jamadeo commented Jul 24, 2026

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fixes #1047

Motivation and Context

Strictly compliant servers must send issuer, but to preserver legacy compatibility, default to allowing missing.

How Has This Been Tested?

Breaking Changes

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

Additional context

@github-actions github-actions Bot added T-core Core library changes T-transport Transport layer changes labels Jul 24, 2026
@jamadeo
jamadeo marked this pull request as ready for review July 25, 2026 00:35
@jamadeo
jamadeo requested a review from a team as a code owner July 25, 2026 00:35
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T-core Core library changes T-transport Transport layer changes

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Successfully merging this pull request may close these issues.

OAuth discovery rejects metadata without issuer, breaking compatibility with rmcp 2.2

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