Resource not accessible by integration - https://docs.github.com/rest/issues/comments#create-an-issue-comment Unable to post PR comment - this is likely a permissions issue. Required permission: "pull-requests: write" needs to be set in your workflow permissions. Add this to your workflow file: jobs: build: runs-on: ubuntu-latest permissions: pull-requests: write See documentation: https://docs.github.com/en/actions/security-for-github-actions/security-guides/automatic-token-authentication#modifying-the-permissions-for-the-github_token For forked PRs, you should use the pull_request_target event instead of pull_request.