MCP servers for Claude Code · Automation / agent builders

Best automation / agent builders MCP server for Claude Code, tested

In ToolPassed's hands-on tests in Claude Code, n8n-mcp is our provisional candidate for automation / agent builders: it passed install, connect, tools and an agent task on 2026-10-21. We ran 3 automation / agent builders MCP servers in Claude Code; 3 passed every step.

Last tested 2026-10-21 · runs from 2026-10-16 to 2026-10-21 · one run per server · How we test

Results in Claude Code

Server	Claude Code
n8n-mcp Automation / agent builders	Passed 2026-10-21 · install, connect, tools, agent task
n8n instance-level MCP Automation / agent builders	Passed 2026-10-16 · install, connect, tools, agent task
Langflow MCP server Automation / agent builders	Passed 2026-10-16 · install, connect, tools, agent task

Dated results

n8n-mcp passed in Claude Code on 2026-10-21 (Claude Code 2.1.296, n8n-mcp 2.94.3, connected in 6.2s). Full result
n8n instance-level MCP passed in Claude Code on 2026-10-16 (Claude Code 2.1.296, server reported v1.2.0, connect time not recorded). Full result
Langflow MCP server passed in Claude Code on 2026-10-16 (Claude Code 2.1.296, server reported v1.30.0, connect time not recorded). Full result

Why n8n-mcp is the candidate

n8n-mcp passed every step in Claude Code. It is the group’s site-wide candidate (judged 2026-10-21): Searched n8n's node library for 'slack' and returned the Slack node in both Claude Code and Cursor (2 calls in total), with nothing but the published snippet: no n8n instance, account or key. It also passed in ChatGPT (Codex) on Oct 15. Runner-up Langflow ran our fixture flow and returned the fresh code in both clients in 2 calls in total, but it needs a running Langflow server and an API key. n8n's own instance-level MCP passed both tasks (node search and running a fixture workflow) in both clients too, but needs a running n8n instance with an access token and took 8 calls on the workflow task (4 per client) against Langflow's 2. Confirmed Oct 21, 2026: a second run in Claude Code and Cursor passed again (n8n-mcp 2.94.3).

Provisional: based on one dated run per app (no repeat runs yet), so treat it as a candidate, not a final pick. How we test.

Same servers in all 4 apps

Server	Claude Code	Cursor	Claude Desktop	ChatGPT (Codex)
n8n-mcp Automation / agent builders	Passed 2026-10-21 · install, connect, tools, agent task	Passed 2026-10-21 · install, connect, tools, agent task	Passed 2026-10-19 · install, connect, tools, agent task	Passed 2026-10-15 · install, connect, tools, agent task
n8n instance-level MCP Automation / agent builders	Passed 2026-10-16 · install, connect, tools, agent task	Passed 2026-10-16 · install, connect, tools, agent task	Not tested yet	Not tested yet
Langflow MCP server Automation / agent builders	Passed 2026-10-16 · install, connect, tools, agent task	Passed 2026-10-16 · install, connect, tools, agent task	Not tested yet	Not tested yet

What failed or is partial in Claude Code

None of these servers failed in Claude Code.

Install in Claude Code

The exact snippet we tested is on the n8n-mcp page (pick the Claude Code tab). Not connecting? Claude Code MCP troubleshooting.

Not tested in Claude Code yet

ARTEMIS (Google), Home Assistant MCP (ha-mcp), agent-device (Callstack), Open Computer Use, Aident Loadout, API.market MCP Gateway. Listed from their source; no result in Claude Code yet.

Questions

What is the best automation / agent builders MCP server for Claude Code?

Does n8n-mcp work with Claude Code?

n8n-mcp passed in Claude Code on 2026-10-21 (Claude Code 2.1.296, n8n-mcp 2.94.3, connected in 6.2s).

More: all MCP servers tested in Claude Code · Automation / agent builders in every app · How we test