Mimo Free

中文文档

OpenCode plugin that adds the MiMo Auto free provider. Zero API key required -- the plugin bootstraps anonymous JWT credentials at runtime.

Install

npm package install

The package is published on npm as opencode-mimo-free-plugin. Add it to your OpenCode config (opencode.json or opencode.jsonc):

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-mimo-free-plugin"],
  "model": "mimo/mimo-auto"
}

OpenCode will install the npm package automatically on next launch.

Local file install

For local development or testing unpublished changes, build the plugin and copy the built file into OpenCode's global plugin directory:

bun install
bun run build
mkdir -p ~/.config/opencode/plugins
cp dist/index.js ~/.config/opencode/plugins/opencode-mimo-free-plugin.js

OpenCode automatically loads JavaScript files from ~/.config/opencode/plugins/ on startup.

What it does

• Registers provider mimo with model mimo-auto via the config hook.
• Uses @ai-sdk/openai-compatible as the AI SDK adapter.
• Bootstraps an anonymous JWT from https://api.xiaomimimo.com/api/free-ai/bootstrap.
• Routes chat requests through https://api.xiaomimimo.com/api/free-ai/openai.
• Stores a stable anonymous client fingerprint under ${XDG_DATA_HOME}/opencode-mimo-free-plugin/client-fingerprint (defaults to ~/.local/share/opencode-mimo-free-plugin/client-fingerprint).

The plugin does not disable or modify any built-in OpenCode providers. It only adds mimo/mimo-auto alongside your existing providers.

Environment variables

Variable	Description
MIMO_FREE_BASE_URL	Override the MiMo service base URL. Default: https://api.xiaomimimo.com/
OPENCODE_MIMO_FREE_DATA_DIR	Override the directory for storing the anonymous fingerprint file.

Local development

bun install
bun run build
bun test

Provenance

Adapted from MiMoCode's MimoFreeAuthPlugin (source). Both MiMoCode and OpenCode are MIT-licensed. MiMo-hosted services and trademarks are governed by their respective upstream terms.

See LICENSE and NOTICE for attribution.

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For AI agents (machine-readable deployment instructions)

If you are an AI coding agent and the user asks you to install this plugin, follow these steps exactly:

1. Open the user's OpenCode config file. It is at one of these paths:

   • Project-level: opencode.json or opencode.jsonc in the project root.
   • Global: ~/.config/opencode/opencode.jsonc.

2. Add "opencode-mimo-free-plugin" to the "plugin" array. Create the array if it does not exist. OpenCode will install the published npm package automatically.

3. Optionally set "model": "mimo/mimo-auto" to use MiMo Auto as the default model.

Example minimal config:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-mimo-free-plugin"],
  "model": "mimo/mimo-auto"
}

Example adding to an existing config:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["existing-plugin", "opencode-mimo-free-plugin"],
  "model": "mimo/mimo-auto"
}

1. No API key or environment variable is required. The plugin handles authentication automatically.

2. Restart OpenCode (or start a new session). The model mimo/mimo-auto will appear in the model list.

3. To verify: run opencode models and confirm mimo/mimo-auto is listed.