OIDC App token exchange returning 500 Internal Server Error since Mar 18 12:00 UTC

[moritzschmitz-oviva]

Problem

All claude-code-action workflows using claude_code_oauth_token have been failing since approximately 2026-03-18 12:00 UTC with:

App token exchange failed: 500 Internal Server Error - Internal server error
Retrying in 5 seconds...
Attempt 1 failed: Internal server error
...
Operation failed after 3 attempts

This affects all three retry attempts. The action never reaches Claude execution.

Impact

• All PR-triggered workflows using claude_code_oauth_token are broken
• Issue comment workflows (@claude) are also affected
• This has been ongoing for 7+ hours with no recovery

Reproduction

Any workflow using:

- uses: anthropics/claude-code-action@v1
  with:
    claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}

Fails immediately at OIDC token exchange.

Environment

• Repository: oviva-ag/claude-code-plugin
• Action version: anthropics/claude-code-action@v1 (SHA: 1b422b3)
• Coincides with Anthropic status page incident: "Elevated errors on Opus 4.6" reported at 12:30 UTC

Example failed runs

• https://github.com/oviva-ag/claude-code-plugin/actions/runs/23263904494
• https://github.com/oviva-ag/claude-code-plugin/actions/runs/23247230397
• https://github.com/oviva-ag/claude-code-plugin/actions/runs/23244292276