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Unknown coding plan provider - Claude Code

Quick fix

Upgrade to v3.20.0 so the Agent Plan /api/plan endpoint is recognized correctly.

Symptom

Section titled “Symptom”
Error output
测试失败: Unknown coding plan provider
English translation

Test failed: Unknown coding plan provider

Cause

Section titled “Cause”

When Claude Code's `ANTHROPIC_BASE_URL` uses the Volcengine Ark Agent Plan `/api/plan` path, older `detect_provider` versions match only `/api/coding`. It therefore returns `None`, causing the usage query to fail and display this error.

Maintainers confirmed this was fixed in v3.20.0: `detect_provider` now matches both `volces.com/api/plan` and `volces.com/api/coding`. If the same account has both Coding Plan and Agent Plan, the quota may still return Agent Plan data. That is a separate detection-order issue and outside this fix.

Fix

Section titled “Fix”

  1. After upgrading CC Switch to v3.20.0, recheck the usage query using the Agent Plan `/api/plan` Base URL.

  2. Before upgrading, temporarily avoid the error by disabling “Enable usage query” on the card using `/api/plan`.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code
Versionv3.17.0（已在 v3.20.0 修复）
PlatformsWindowsLinux

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”

(No FAQ yet)

Section titled “Related problems”
exceeded retry limit, last status: 429 Too Many RequestsAn incorrect GLM preset URL can cause 429: delete the old GLM provider, create the official preset in cc-switch, confirm it uses a Coding Plan link, and check…3 issues mergedOnly under the OpenCode agentUpdate to v3.16.4 or later to use OpenCode Go presets with API Key-only configuration in Claude Code, Claude Desktop, Codex, and OpenCode.1 issues mergedAuth conflictLog out of the official Claude login, clear conflicting ANTHROPIC_* variables, set hasCompletedOnboarding to true in ~/.claude.json, and restart the terminal.6 issues merged

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