ANTHROPIC_FOUNDRY_AUTH_TOKEN Environment Variable

Token-based authentication is now supported for Amazon Bedrock Foundry alongside the existing ANTHROPIC_FOUNDRY_API_KEY. When ANTHROPIC_FOUNDRY_AUTH_TOKEN is set, it is used directly as a bearer token instead of deriving credentials from the API key.

Usage

export ANTHROPIC_FOUNDRY_AUTH_TOKEN="my-bearer-token"
claude

Details

Token-based auth is checked first; API key auth is used as fallback
Useful when a bearer token is injected by infrastructure (e.g. IAM credential vending)
Both variables are now shown in /doctor

Evidence

Auth provider selection (search for "ANTHROPIC_FOUNDRY_AUTH_TOKEN")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

How sure we are

One source agreesOne thing we can check says the same as this entry.

Anthropic's release notes agreeRemoved the startup "claude command missing or broken" warnings — they now appear in /doctor and /status instead

See this entry in the whole of v2.1.203 →

The build it came inv2.1.203

7 Jul 2026 · 24 entries, this one is #1.

Either side of it

v2.1.202Older
v2.1.204Newer

Open the release →

Names in this entry

envANTHROPIC_FOUNDRY_AUTH_TOKEN
Bearer token for Microsoft Foundry authentication, such as a Microsoft Entra access token. Claude Code sends it as the Authorization: Bearer header. Takes precedence over ANTHROPIC_FOUNDRY_API_KEY and over the Azure default credential chain. See Microsoft Foundry. Requires Claude Code v2.1.203 or later
envANTHROPIC_FOUNDRY_API_KEY
API key for Microsoft Foundry authentication (see Microsoft Foundry)
slash/doctor
Skill. Run a setup checkup that diagnoses issues and can fix them. Checks installation health, including duplicate or leftover installs, PATH problems, and unparseable settings files. Finds unused skills, MCP servers, and plugins versus their context cost, flags slow hooks, and checks for a newer version on your release channel. Deduplicates local CLAUDE.md files against checked-in ones, trims checked-in CLAUDE.md files by cutting content Claude could derive from the codebase, and migrates the always-loaded guidance that remains into skills and nested CLAUDE.md files that load on demand. Also offers to make auto mode your default and to pre-approve frequently denied read-only commands. Reports findings first and asks for confirmation before changing anything. From the terminal, claude doctor prints read-only installation diagnostics without starting a session. Alias: /checkup. Run /doctor prompt-audit to have Claude audit your CLAUDE.md files, skills, and other configuration for outdated or conflicting instructions instead of running the checkup. The prompt-audit subcommand requires Claude Code v2.1.283 or later. The CLAUDE.md trim check requires Claude Code v2.1.206 or later. Before v2.1.205, /doctor opened a read-only diagnostics screen and pressing f sent the report to Claude

Anthropic's note

Upstream's own release notes for v2.1.203 name something this entry names, so the two are probably about the same change. Probably: the pairing is made on a shared name rather than on the words around it.

Removed the startup "claude command missing or broken" warnings — they now appear in /doctor and /status instead

Is this right?

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.