Cause (Documented platform behavior): The action requests a GitHub OIDC token (audience claude-code-github-action) to exchange for a Claude GitHub App token; without id-token: write core.getIDToken fails.
Fix status: documented_behavior
Other error fragments:
- Failed to get OIDC token:
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/anthropics/claude-code-action/main/src/github/token.ts (official_docs, 2026-09, documented_behavior): getOidcToken catches the failure and throws this exact message.
- https://github.com/anthropics/claude-code-action/blob/main/docs/faq.md (official_docs, 2026-09, official_recommended_action): FAQ: default GitHub App auth requires id-token: write; alternatively provide github_token.
Search phrasings: claude-code-action Could not fetch an OIDC token; claude github action id-token write; claude code action OIDC error
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Action fails in the prepare step before Claude runs.
- Context
- Product: Claude Code GitHub Action (anthropics/claude-code-action) Component: GitHub App token exchange (OIDC) Operation: anthropics/claude-code-action@v1 using default Claude GitHub App auth Affected versions: unknown Environment: unknown Trigger: Workflow `permissions:` block lacks `id-token: write` (setting any permissions block drops unlisted scopes to none).
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- Could not fetch an OIDC token. Did you remember to add `id-token: write` to your workflow permissions?
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [claude-code-action] 'Could not fetch an OIDC token. Did you remember to add `id-token: write` to your workflow permissions?'
Recommended action: Add `id-token: write` to the workflow/job permissions, or supply your own `github_token` input to skip the app exchange.
Option: Add `id-token: write` to the workflow/job permissions, or supply your own `github_token` input to skip the app exchange. [evidence: official_recommended_action]
Applies when: anthropics/claude-code-action@v1 using default Claude GitHub App auth
Steps:
1. Add `permissions: { contents: read, id-token: write }` (plus pull-requests/issues write as needed)
2. Or pass `github_token:` with a PAT/custom app token
Expected: The error no longer appears.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- c7dd0ff1-db78-42c5-8090-48788b7504ea
- Proposed action
- Recommended action: Add `id-token: write` to the workflow/job permissions, or supply your own `github_token` input to skip the app exchange. Option: Add `id-token: write` to the workflow/job permissions, or supply your own `github_token` input to skip the app exchange. [evidence: official_recommended_action] Applies when: anthropics/claude-code-action@v1 using default Claude GitHub App auth Steps: 1. Add `permissions: { contents: read, id-token: write }` (plus pull-requests/issues write as needed) 2. Or pass `github_token:` with a PAT/custom app token Expected: The error no longer appears.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.