Quadratic MCP server

Quadratic is an MCP server with 5 tools an agent can call, among them auth, files_read, files_write. It answers at https://mcp.quadratichq.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 23 October 2026, succeeded.

Status

Answering

Tools

Reliability

6 of 6 checks

Response time

558 ms

Transport

streamable HTTP

Last checked

23 October 2026

AI access to Quadratic spreadsheets: open files, run Python/SQL, query connected databases.

Description as the publisher wrote it.

The 5 tools Quadratic offers

Tool	What it does
`auth`	Authenticate the MCP session with Quadratic. Actions: • login() — Start an OAuth device authorization flow. Returns a URL the user must open in a browser to authorize. The flow is completed by confirm_login. • confirm_login(device_code) — C Inputs: action, params
`files_read`	Read-only file metadata operations on Quadratic files the user has access to. No data is modified. Requires authentication. Actions: • list_files() — List all accessible files. • get_file_info(file_id) — Get metadata for a single file. Inputs: action, params
`files_write`	File management operations that create or modify state: create a new file, open an existing file to start an editing session, or close a session. Requires authentication. Actions: • open_file(file_id?, file_name?) — Open a file by UUID or n Inputs: action, params
`read_data`	Read-only queries on the open spreadsheet. No data is modified. Safe to auto-approve. Call as {"action": "<name>", "params": {...}} — per-action params are listed in the Action Reference below. Special actions (not shown in the action enum) Inputs: action, params
`write_data`	Write operations on the open spreadsheet. Call as {"action": "<name>", "params": {...}} — per-action params are listed in the Action Reference below. Numbers, booleans, and nulls in cell values are coerced to strings. Special actions (not s Inputs: action, params

Add Quadratic to your AI client

Every block below points at https://mcp.quadratichq.com/mcp. Pick your client and copy.

Claude Code: one command in your terminal

claude mcp add --transport http quadratic https://mcp.quadratichq.com/mcp

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "quadratic": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.quadratichq.com/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

{
  "mcpServers": {
    "quadratic": {
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "quadratic": {
      "type": "http",
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Zed: Zed settings.json

{
  "context_servers": {
    "quadratic": {
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Windsurf: ~/.codeium/mcp_config.json

{
  "mcpServers": {
    "quadratic": {
      "serverUrl": "https://mcp.quadratichq.com/mcp"
    }
  }
}

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

{
  "mcpServers": {
    "quadratic": {
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Continue: .continue/mcpServers/neuronto.yaml

name: Quadratic
version: 0.0.1
schema: v1
mcpServers:
  - name: Quadratic
    type: streamable-http
    url: https://mcp.quadratichq.com/mcp

Gemini CLI: ~/.gemini/settings.json

{
  "mcpServers": {
    "quadratic": {
      "httpUrl": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Codex CLI: MCP server config

{
  "mcpServers": {
    "quadratic": {
      "type": "http",
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Warp: MCP servers, + Add, paste JSON

{
  "mcpServers": {
    "quadratic": {
      "url": "https://mcp.quadratichq.com/mcp"
    }
  }
}

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Fmcp.quadratichq.com%2Fmcp&type=streamable_http&id=quadratic&name=Quadratic

Is Quadratic up right now?

It answered our last check on 23 October 2026 in 558 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about Quadratic

How many tools does Quadratic have?

5, as returned by the server's own tools/list on 20 September 2026: auth, files_read, files_write, read_data, write_data.

Is Quadratic down?

It answered our last check on 23 October 2026 in 558 ms. Over 6 checks since 11 September 2026 it answered 6.

How do I add Quadratic to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.quadratichq.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Quadratic need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: io.github.quadratichq. Endpoint host: mcp.quadratichq.com. ARD identifier: urn:air:io.github.quadratichq:mcp:quadratic-mcp. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.