Figviz MCP server

Generate clear, labeled science & math diagrams (biology, chemistry, physics, K-12 math, lab setups, graphic organizers) straight from your AI assistant, via the Figviz API.

Works with any Model Context Protocol client — Claude Desktop, Cursor, Cline, Windsurf, and more.

What it does

Exposes one tool:

• generate_diagram — describe a diagram in plain text and get back a hosted image URL. Options: quality (1k / 2k / 4k) and aspectRatio (e.g. 16:9, 1:1).

Example prompts:

• "labeled plant cell cross-section for 8th grade"
• "convex lens ray diagram, object between F and 2F"
• "acid–base titration setup for high school chemistry"
• "KWL chart graphic organizer, blank"

Get an API key

Create a free key (includes 3 credits) at https://figviz.com/settings/api. Figviz is pay-as-you-go — no subscription, credits never expire.

Install

Run it with npx (no install needed):

FIGVIZ_API_KEY=fvk_xxx npx -y figviz-mcp

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "figviz": {
      "command": "npx",
      "args": ["-y", "figviz-mcp"],
      "env": { "FIGVIZ_API_KEY": "fvk_xxx" }
    }
  }
}

Cursor / Cline / Windsurf

Add the same server entry to your client's MCP config (mcp.json or the MCP settings UI):

{
  "mcpServers": {
    "figviz": {
      "command": "npx",
      "args": ["-y", "figviz-mcp"],
      "env": { "FIGVIZ_API_KEY": "fvk_xxx" }
    }
  }
}

Then ask your assistant: "Use figviz to generate a labeled animal cell diagram for 7th grade."

Environment variables

| Variable | Required | Default | Description | | ----------------- | -------- | -------------------- | --------------------------------- | | FIGVIZ_API_KEY | yes | — | Your fvk_… key from figviz.com | | FIGVIZ_API_BASE | no | https://figviz.com | Override the API host (advanced) |

Credits & pricing

Each diagram costs 1 credit (4k costs 1.5). Buy credit packs at https://figviz.com/pricing. The MCP shares the same balance as your Figviz account.

License

MIT