MCP server

ZeroWidth Official

ai.zerowidth/zerowidth

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Search, write and run work across Compass, Workbench, Caliper, Ledger, Prism and Napkin.

Working at last checkVerified publisher: zerowidth.aiAbout 122,516 tokens per request once connected299 tools

https://api.zerowidth.ai/mcp

At a glance

Type: MCP server
Publisher: zerowidth.ai (verified by the MCP Registry)
Status: Working at last check
Tools: 299
Token cost: About 122,516 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http zerowidth https://api.zerowidth.ai/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.zerowidth]
url = "https://api.zerowidth.ai/mcp"

Gemini CLI

{"mcpServers":{"zerowidth":{"httpUrl":"https://api.zerowidth.ai/mcp"}}}

Cursor

{"mcpServers":{"zerowidth":{"url":"https://api.zerowidth.ai/mcp"}}}

VS Code

{"servers":{"zerowidth":{"type":"http","url":"https://api.zerowidth.ai/mcp"}}}

Antigravity

agy mcp add zerowidth https://api.zerowidth.ai/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"zerowidth","server_url":"https://api.zerowidth.ai/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"zerowidth","server_url":"https://api.zerowidth.ai/mcp"}

get_post ~119 tokens
Fetch the full Markdown body of one Distributed Cognition essay by slug (from `list_posts`). Link the public URL when citing it to the user. No authentication required.
list_posts ~190 tokens
Lists ZeroWidth's published Distributed Cognition essays (newest first): title, slug, excerpt, byline, public URL. Use this when the user asks what's been published, or when a workspace question might already have an essay behind it — then fetch the full text with `get_post`. No authentication requi

ZeroWidth Caliper
Build datasets and rubrics, then run evals that score your AI in Caliper.
ZeroWidth Compass
Read and update your Compass map: pages, changes, opportunities and interviews.
ZeroWidth Workbench
Build, run and publish Workbench flows, tasks, shims and knowledge bases.

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