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API 400 error when using the xiaomimimo token plan with Claude Code

Quick fix

Upgrade to cc-switch v4.0 and retry. If the error persists, provide the version and reproduction steps when reporting it again.

Symptom

Section titled “Symptom”
Error output
设置 https://token-plan-cn.xiaomimimo.com/anthropic 接口 400错误
English translation

Set the https://token-plan-cn.xiaomimimo.com/anthropic endpoint; API 400 error

Cause

Section titled “Cause”

The issue asks how to use token plan subscriptions such as xiaomimimo with the Claude Code desktop app and reports a 400 error when configuring this Anthropic endpoint. The maintainer did not confirm the specific cause or provide setup steps for the plan. The issue was closed because the interface and configuration-writing behavior changed significantly in v4.0.

Fix

Section titled “Fix”

  1. Upgrade to cc-switch v4.0 and retry the configuration. The maintainer noted that the new version changed the interface, aggregation mode, and configuration switching behavior.

  2. If the problem persists after upgrading, provide the cc-switch version and reproduction steps when reporting it again.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code
VersionUnknown
PlatformsUnknown

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”
What should I do if the problem persists after upgrading to v4.0?
Provide the cc-switch version and reproduction steps when reporting it again.
Section titled “Related problems”
HTTP 401 Unauthorized - CC Switch AnthropicUpgrade cc-switch to a fixed build so it sends the x-api-key and anthropic-version headers Anthropic requires.2 issues mergedAPI Error: 404 - Claude Code path assembly or unregistered routeCheck whether the API address was assembled wrongly, or upgrade cc-switch for the 404 from OpenAI-compatible mode and the missing local route.4 issues mergedmessages[1]: missing field `content` (HTTP 400)Upgrade CC Switch to v3.20.4; the converter skips additional_tools carriers without content, preventing strict upstream services from returning 400.1 issues merged

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