Claude integration rejects Claude Code OAuth tokens (sk-ant-oat…)

[strelov1]

Problem

The Claude integration only accepts an Anthropic API key. A Claude Code OAuth token (sk-ant-oat…) pasted into the same field fails, because the client always sends the credential in the x-api-key header and the Anthropic API answers invalid x-api-key — these tokens must be sent as a bearer token.

Users on a Claude subscription therefore cannot use Text Prompt at all without buying separate API credits.

Expected

The API Key field accepts either credential kind. The two are mutually exclusive and the sk-ant-oat prefix already distinguishes them, so no new configuration field is needed — the client can pick the auth header from the prefix.

Scope

OAuth tokens are inference-only. Verified against the live API: GET /models and POST /messages return 200; batches (403), files (404), agents (401) and environments (403) reject the token. Those actions can keep surfacing the API scope error rather than a local pre-check.

Notes

• anthropic-beta: oauth-2025-04-20 is not required for either endpoint.
• Related: Integrations stay green after credentials expire or disconnect #6067 (integration health after credential problems), Support multiple API keys #5594 (multiple API keys — orthogonal, this is a second credential kind, not a second key).

Affected: pkg/integrations/claude/client.go, pkg/integrations/claude/claude.go.

[strelov1]

Already have a fix ready for this: strelov1#1 (tested end-to-end against a real subscription token, including a full Run Claude Code workflow — also covers #6488 in the same PR).

Noticed #6492 was opened against this issue in the meantime — left a note there. Will open a PR against this repo once a maintainer confirms interest in this approach.