One MCP Server

Connect your AI agents to 700+ apps through a single MCP server. Search for actions, read documentation, and execute API calls across platforms, without having to manage OAuth tokens or API keys.

People who work with apps, one and gemini cli extension and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-16 · ★ 10 · #24 OF 278 MAINTAINED API INTEGRATION · VERIFIED 2026-09-18

MIT · TypeScript servers · how we verify → /methodology

01 · Install One

before you install - you'll need

Set ONE_SECRET, ONE_IDENTITY, ONE_IDENTITY_TYPE, ONE_PERMISSIONS, ONE_CONNECTION_KEYS, ONE_ACTION_IDS, ONE_KNOWLEDGE_AGENT before connecting.

Claude Code

claude mcp add withoneai-mcp --transport http https://mcp.withone.ai/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "withoneai-mcp": {
      "url": "https://mcp.withone.ai/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://mcp.withone.ai/mcp

transport: streamable-http

endpoint alive - authentication required · probed 2026-09-18

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to mcp.withone.ai

endpoint auth requires authentication - rejected our unauthenticated MCP initialize

license MIT - declared in the repository

npm package @withone/mcp - the @withone scope differs from the repo owner (withoneai); confirm it's the project's official package

registry vendor namespace ai.withone - domain-verified with the official MCP registry

03 · What One can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

1.3.1 · 2026-09-16

keep One's own headers authoritative on passthrough and redact error logs

1.3.0 · 2026-09-15

add llms-install.md and 400x400 logo for agentic installers · correct list_one_integrations response shape in llms-install.md · document both response shapes in llms-install.md verification · add Windsurf one-click…

1.2.4 · 2026-08-20

update app count to 700+ in the registry listing description and README. No functional changes.

04 · Who maintains One

One is maintained by withoneai. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/withoneai/mcp
website: https://withone.ai/
category: API integration - ranked #24 of 278 actively-maintained API integration servers as of 2026-09-18.
release cadence: 9 releases in the last 90 days (latest 2026-09-16)
registry: ai.withone/mcp (active, first published 2026-08-12 · 4 versions)
packages: npm:@withone/mcp

06 · One FAQ

What is One?

Connect your AI agents to 700+ apps through a single MCP server. Search for actions, read documentation, and execute API calls across platforms, without having to manage OAuth tokens or API keys.

Is One still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-16 and it shipped 9 releases in the last 90 days. We re-verify nightly.

How do I install One?

Run `npx -y @withone/mcp`. The README documents 7 environment variables (ONE_SECRET, ONE_IDENTITY, ONE_IDENTITY_TYPE…) to set first. Set ONE_SECRET, ONE_IDENTITY, ONE_IDENTITY_TYPE, ONE_PERMISSIONS, ONE_CONNECTION_KEYS, ONE_ACTION_IDS, ONE_KNOWLEDGE_AGENT before connecting. You can also paste the ready-made client config above.

Does One require authentication?

Yes - when we probed the endpoint on 2026-09-18, it rejected an unauthenticated MCP initialize; you'll need credentials to connect.

07 · Alternatives to One

Alternatives to One

Maintained API integration servers if One isn't the fit.

More API integration MCP servers · Fast News MCP · Matplotlibnet · Caddy MCP Server · Fetch MCP Server · Jobverify

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