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feat: classify authorization-required errors - #1056

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DaleSeo merged 1 commit into
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fix/issue-795-auth-error
Jul 31, 2026
Merged

feat: classify authorization-required errors#1056
DaleSeo merged 1 commit into
mainfrom
fix/issue-795-auth-error

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@DaleSeo

@DaleSeo DaleSeo commented Jul 27, 2026

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Closes #795.

Motivation and Context

OAuth initialization can currently ask the caller to authorize through either AuthError::AuthorizationRequired or StreamableHttpError::AuthRequired. Because ClientInitializeError erases the concrete transport error, callers must downcast it and match both variants even though both require the same action.

This PR classifies those existing errors through their standard source chain and exposes one predicate on ClientInitializeError. The transport-level classifier remains crate-private so this does not introduce a broader error-category API without a demonstrated use case.

How Has This Been Tested?

Add 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

@github-actions github-actions Bot added T-documentation Documentation improvements T-dependencies Dependencies related changes T-test Testing related changes T-config Configuration file changes T-core Core library changes T-service Service layer changes labels Jul 27, 2026
@DaleSeo
DaleSeo force-pushed the fix/issue-795-auth-error branch 2 times, most recently from bc1d788 to 872c35d Compare July 27, 2026 17:52
@DaleSeo
DaleSeo force-pushed the fix/issue-795-auth-error branch from 872c35d to ec4c0cc Compare July 27, 2026 18:18
@DaleSeo
DaleSeo marked this pull request as ready for review July 27, 2026 22:32
@DaleSeo
DaleSeo requested a review from a team as a code owner July 27, 2026 22:32
@DaleSeo DaleSeo self-assigned this Jul 28, 2026
@DaleSeo
DaleSeo merged commit 65f05e9 into main Jul 31, 2026
22 checks passed
@DaleSeo
DaleSeo deleted the fix/issue-795-auth-error branch July 31, 2026 13:00
@github-actions github-actions Bot mentioned this pull request Jul 31, 2026
howardjohn pushed a commit to agentgateway/agentgateway that referenced this pull request Jul 31, 2026
Bump to latest stable release
https://github.com/modelcontextprotocol/rust-sdk/releases/tag/rmcp-v3.1.0

```
Added
classify authorization-required errors (modelcontextprotocol/rust-sdk#1056)
add strict stateless protocol metadata validation (modelcontextprotocol/rust-sdk#1091)
SEP-2260 stream-based enforcement of client receive-side request association (modelcontextprotocol/rust-sdk#1055)
Fixed
(model) decode metadata-bearing input-required results affecting mrtr (modelcontextprotocol/rust-sdk#1097)
require metadata for modern HTTP requests (modelcontextprotocol/rust-sdk#1089)
honor supported_protocol_versions when negotiating initialize (modelcontextprotocol/rust-sdk#1093)
Other
document the ping utility with examples (modelcontextprotocol/rust-sdk#1106)
complete Tier 1 feature docs and finalize roadmap (modelcontextprotocol/rust-sdk#1101)
(conformance) meeting requirements for tier 1 (modelcontextprotocol/rust-sdk#1087)
```

Signed-off-by: Filinto Duran <1373693+filintod@users.noreply.github.com>
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Labels

T-config Configuration file changes T-core Core library changes T-dependencies Dependencies related changes T-documentation Documentation improvements T-service Service layer changes T-test Testing related changes

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More accessible auth error and avoid multiple types

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