glm-mcp 0.8.1

MCP server for ZhipuAI GLM — chat, text embeddings, translation, vision, and OCR

glm-mcp

MCP server for ZhipuAI GLM — exposes chat, text embeddings, translation, vision, and OCR to Claude Code (and any MCP-compatible client) via the OpenAI-compatible API.

Tools

Tool	Description
glm_chat	Text completion — default model glm-4-flash, pass model= to use any GLM chat model (e.g. glm-5). Supports single-turn and multi-turn (messages= parameter). Sampling: temperature=0.7, top_p=0.95 (pass top_p=None to omit). Auto-fallback on transient errors (429/503/timeout/connection) via auto_fallback=True (default). Use avoid_peak_hours=True to pre-emptively switch during peak hours (UTC+8 14:00–18:00).
glm_embed	Text embeddings — default model embedding-3, pass model= to override
glm_usage_summary	Query token usage from ~/.glm-mcp/usage.jsonl. Parameters: days (default 7), model (optional filter). Returns period, total tokens, by_tool, by_model.
glm_translate	Pure single-language translation — default model glm-4.7. Parameters: text, target_lang ("ja", "zh", "en"), source_lang (default "auto"), style ("formal" or "casual", default "formal"). Sampling: temperature=1.0, top_p=0.8 (GLM-4.7 Plan B: top_p as primary control; pass top_p=None to omit). Outputs ONLY the target language, solving the mixed Chinese–Japanese output problem common with general LLMs.
glm_vision	Multimodal image analysis — default model glm-4.6v. Parameters: image_url (HTTP/HTTPS URL or Base64 string), prompt, detail ("auto", "low", "high"), max_tokens (default 2048). Sampling: temperature=0.2, top_p=0.9 (focused stable analysis; pass top_p=None to omit). Auto-fallback to glm-4.6v-flash on 429/503/timeout. Bare Base64 strings are automatically prefixed with data:image/png;base64,.
glm_ocr	Document and image OCR — default model glm-ocr. Parameters: file (HTTP/HTTPS URL, Base64 string, data: URI, or local file path), model, start_page_id, end_page_id. Returns extracted text as Markdown. Local files are auto-encoded as Base64; bare Base64 strings are prefixed with data:application/pdf;base64,.

Quick Start

Install via uvx (recommended)

uvx glm-mcp

Add to Claude Code

Add to ~/.claude.json:

{
  "mcpServers": {
    "glm-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": ["glm-mcp"],
      "env": {
        "GLM_API_KEY": "your_api_key_here"
      }
    }
  }
}

Get your API key at https://open.bigmodel.cn/.

Run from source

git clone https://github.com/sky-zhang01/glm-mcp
cd glm-mcp
uv sync
GLM_API_KEY=your_key uv run glm-mcp

Environment Variables

Variable	Required	Default	Description
GLM_API_KEY	Yes	—	ZhipuAI API key
GLM_BASE_URL	No	https://open.bigmodel.cn/api/paas/v4/	API endpoint override
GLM_MCP_LOG_DIR	No	~/.glm-mcp/	Directory for usage.jsonl token log

Token Usage Logging

Each tool call appends a JSON line to ~/.glm-mcp/usage.jsonl:

{"timestamp": "...", "tool": "glm_chat", "model": "glm-4-flash", "input_tokens": 13, "output_tokens": 15, "fallback_used": false, "original_model": null, "fallback_reason": null}

When fallback is triggered:

{"timestamp": "...", "tool": "glm_chat", "model": "glm-4.7", "input_tokens": 13, "output_tokens": 15, "fallback_used": true, "original_model": "GLM-5", "fallback_reason": "429"}

Development

uv sync --dev
uv run pytest --cov=glm_mcp --cov-report=term-missing

License

MIT