# Evidence Pack (Concise)

## Topic
Claude Code “subscription auth as API key” clampdown

## Anchors (short list)

- **search:BloopAI/vibe-kanban**
  - Created: 2026-01-18T21:00:49Z
  - URL: https://github.com/BloopAI/vibe-kanban/issues/2130
  - Title: Using opencode with Anthropic fails
  - Excerpt: Hi,
I'm trying to use opencode with the Anthropic API to use Claude Opus 4.5.
The model is set to `anthropic/claude-opus-4-5`.
It works well in opencode.

It fails with the following message in vibe-kanban:

<img width="865" height="397" alt="Image" src="https…
- **clawdbot/clawdbot#1189**
  - Created: 2026-01-18T18:28:25Z
  - URL: https://github.com/clawdbot/clawdbot/issues/1189
  - Title: [Bug]: OAuth returns Claude Code-restricted credentials instead of Claude Max subscription credentials                                             
  - Excerpt: ## Summary                                                                                                                                  
  OAuth flow returns Claude Code-restricted credentials instead of Claude Max subscription credentials                 …
- **search:clawdbot/clawdbot**
  - Created: 2026-01-18T18:28:25Z
  - URL: https://github.com/clawdbot/clawdbot/issues/1189
  - Title: [Bug]: OAuth returns Claude Code-restricted credentials instead of Claude Max subscription credentials                                             
  - Excerpt: ## Summary                                                                                                                                  
  OAuth flow returns Claude Code-restricted credentials instead of Claude Max subscription credentials                 …
- **Kilo-Org/kilocode#5038**
  - Created: 2026-01-14T17:48:45Z
  - URL: https://github.com/Kilo-Org/kilocode/issues/5038
  - Title: Claude Code Opus 4.5: it's the end
  - Excerpt: ### Plugin Type

VSCode Extension

### App Version

4.146.0

### Description

After OpenCode, Kilocode is also blocked by Anthropic for use with the Claude Code subscription. 

```
Date/time: 2026-01-14T17:35:20.997Z
Extension version: 4.146.0
Provider: claude…
- **search:Kilo-Org/kilocode**
  - Created: 2026-01-14T17:48:45Z
  - URL: https://github.com/Kilo-Org/kilocode/issues/5038
  - Title: Claude Code Opus 4.5: it's the end
  - Excerpt: ### Plugin Type

VSCode Extension

### App Version

4.146.0

### Description

After OpenCode, Kilocode is also blocked by Anthropic for use with the Claude Code subscription. 

```
Date/time: 2026-01-14T17:35:20.997Z
Extension version: 4.146.0
Provider: claude…
- **search:anomalyco/opencode-anthropic-auth**
  - Created: 2026-01-09T14:35:56Z
  - URL: https://github.com/anomalyco/opencode-anthropic-auth/issues/12
  - Title: The auth no longer works
  - Excerpt: It worked today but just stopped working :/ 

```This credential is only authorized for use with Claude Code and cannot be used for other API requests.```
- **anomalyco/opencode#7471**
  - Created: 2026-01-09T12:12:27Z
  - URL: https://github.com/anomalyco/opencode/issues/7471
  - Title: Claude Subscription is not working anymopre
  - Excerpt: ### Description

[*]
Claude Pro Log in with Anthropic to use your Claude Pro or Max account

This feature above is not working

This is the error message 
This credential is only authorized for use with Claude Code and cannot be used for other API requests

##…
- **search:anomalyco/opencode**
  - Created: 2026-01-09T12:12:27Z
  - URL: https://github.com/anomalyco/opencode/issues/7471
  - Title: Claude Subscription is not working anymopre
  - Excerpt: ### Description

[*]
Claude Pro Log in with Anthropic to use your Claude Pro or Max account

This feature above is not working

This is the error message 
This credential is only authorized for use with Claude Code and cannot be used for other API requests

##…
- **code-yeongyu/oh-my-opencode#626**
  - Created: 2026-01-09T11:21:22Z
  - URL: https://github.com/code-yeongyu/oh-my-opencode/issues/626
  - Title: [Bug] Anthropic Max Pro Credentials Failing (Total Block + Billing Fallback)
  - Excerpt: ## Description
I am encountering a critical issue where my Anthropic Max Pro subscription credentials are no longer being recognized.

The tool fails to use my subscription and instead falls back to the "Sisyphus" managed backend, which demands a separate paym…
- **search:code-yeongyu/oh-my-opencode**
  - Created: 2026-01-09T11:21:22Z
  - URL: https://github.com/code-yeongyu/oh-my-opencode/issues/626
  - Title: [Bug] Anthropic Max Pro Credentials Failing (Total Block + Billing Fallback)
  - Excerpt: ## Description
I am encountering a critical issue where my Anthropic Max Pro subscription credentials are no longer being recognized.

The tool fails to use my subscription and instead falls back to the "Sisyphus" managed backend, which demands a separate paym…
- **anomalyco/opencode#7456**
  - Created: 2026-01-09T10:02:04Z
  - URL: https://github.com/anomalyco/opencode/issues/7456
  - Title: fix: Claude Code API credentials
  - Excerpt: ### Question

 ## Problem

  When using Anthropic credentials from Claude Code (the official Anthropic CLI), OpenCode displays:

  > "This credential is only authorized for use with Claude Code and cannot be used for other API requests."

  This warning appear…
- **search:anomalyco/opencode**
  - Created: 2026-01-09T10:02:04Z
  - URL: https://github.com/anomalyco/opencode/issues/7456
  - Title: fix: Claude Code API credentials
  - Excerpt: ### Question

 ## Problem

  When using Anthropic credentials from Claude Code (the official Anthropic CLI), OpenCode displays:

  > "This credential is only authorized for use with Claude Code and cannot be used for other API requests."

  This warning appear…

(Plus 11 more anchors in evidence-pack.md / evidence-pack.json.)

## Repo scale (stars)

- **anomalyco/opencode** — 76649 stars
  - URL: https://github.com/anomalyco/opencode
- **anthropics/claude-code** — 57904 stars
  - URL: https://github.com/anthropics/claude-code
- **RooCodeInc/Roo-Code** — 21801 stars
  - URL: https://github.com/RooCodeInc/Roo-Code
- **Kilo-Org/kilocode** — 14193 stars
  - URL: https://github.com/Kilo-Org/kilocode
- **frankbria/ralph-claude-code** — 3743 stars
  - URL: https://github.com/frankbria/ralph-claude-code

## Allowed claims (strict)
- GitHub search shows this error string appearing across multiple issue threads (sampled 10; total_count=47).
- In 2025-09-23 → 2026-01-18, multiple GitHub issues were opened reporting a breakage of “Claude subscription / Claude Max” usage in third-party tools.
- The Roo Code issue text includes the exact error string: “This credential is only authorized for use with Claude Code and cannot be used for other API requests.”
- Some users describe using “Claude Code as an API Provider” and being on a Max plan (per the issue body).
- Some tools explicitly offered “Log in with Anthropic to use your Claude Pro or Max account” (as described in issue threads).
- Some developers reported OAuth returning Claude Code–restricted credentials (per the clawdbot/clawdbot issue).
- Some projects fell back to alternative billing backends after the breakage (per the oh-my-opencode issue).
- Repo metadata (stars, createdAt) is included for major tools involved (OpenCode, Roo Code, KiloCode, anthropics/claude-code).
- The Ralph repo describes an “autonomous AI development loop” with “rate limiting” and notes it is named after Ralph Wiggum via Geoffrey Huntley technique.
- Any competitor/xAI/Cursor angle must be treated as “reports say” and attributed to the paddo.dev post unless we obtain a primary receipt.

## Forbidden claims (auto-fail)
- Do not claim pricing/plan costs.
- Do not claim internal implementation details (cookies, whitelists, internal APIs, auth headers) unless a receipt explicitly states it.
- Do not claim “unlimited” usage unless a receipt explicitly states it.
- Do not assert timelines like “for months/weeks” unless a receipt provides it; otherwise mark [UNVERIFIED].