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Bump mcp from 0.20.0 to 0.21.0 in /docs#432

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Bump mcp from 0.20.0 to 0.21.0 in /docs#432
dependabot[bot] wants to merge 1 commit into
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dependabot/bundler/docs/mcp-0.21.0

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@dependabot dependabot Bot commented on behalf of github Jun 21, 2026

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Bumps mcp from 0.20.0 to 0.21.0.

Release notes

Sourced from mcp's releases.

v0.21.0

Added

  • Support capability extensions per SEP-2133 (#405)
  • Add range validation for MCP::Annotations#priority per MCP specification (#410)
  • Isolate stateless requests in ephemeral sessions per SEP-2567 (#415)

Changed

  • Set OIDC application_type on Dynamic Client Registration per SEP-837 (#408)
  • Fall back to legacy 2025-03-26 OAuth discovery for servers without PRM (#414)
Changelog

Sourced from mcp's changelog.

[0.21.0] - 2026-06-20

Added

  • Support capability extensions per SEP-2133 (#405)
  • Add range validation for MCP::Annotations#priority per MCP specification (#410)
  • Isolate stateless requests in ephemeral sessions per SEP-2567 (#415)

Changed

  • Set OIDC application_type on Dynamic Client Registration per SEP-837 (#408)
  • Fall back to legacy 2025-03-26 OAuth discovery for servers without PRM (#414)
Commits
  • db460e5 Merge pull request #420 from koic/release_0_21_0
  • 49a08bf Release 0.21.0
  • 217542f Merge pull request #416 from koic/fix_a_build_error
  • cfc9a69 Fix a build error in the Ruby 3.1 CI matrix
  • c8e0cd9 Merge pull request #415 from koic/stateless_session_isolation
  • aac41cd Merge pull request #408 from koic/dcr_application_type
  • 60f0088 Merge pull request #414 from koic/2025_03_26_backcompat
  • 2c223dd Fall Back to Legacy 2025-03-26 OAuth Discovery for Servers Without PRM
  • eb6ff5d Isolate Stateless Requests in Ephemeral Sessions per SEP-2567
  • a0cd662 Merge pull request #413 from koic/document_tool_argument_symbol_keys
  • Additional commits viewable in compare view

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Summary by cubic

Bumps mcp in /docs from 0.20.0 to 0.21.0. Improves spec compliance and capability support, and hardens OAuth discovery and session handling.

  • Dependencies
    • Update mcp 0.20.0 → 0.21.0.
    • Notables: capability extensions, priority range validation for MCP::Annotations#priority, ephemeral session isolation, OIDC DCR application_type set with legacy OAuth discovery fallback.

Written for commit 41ee0da. Summary will update on new commits.

Review in cubic

Bumps [mcp](https://github.com/modelcontextprotocol/ruby-sdk) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/modelcontextprotocol/ruby-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/ruby-sdk/blob/main/CHANGELOG.md)
- [Commits](modelcontextprotocol/ruby-sdk@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file ruby Pull requests that update ruby code labels Jun 21, 2026
@dependabot dependabot Bot requested a review from cirdes as a code owner June 21, 2026 10:03
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file ruby Pull requests that update ruby code labels Jun 21, 2026
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