# MCP servers won't initialize **URL:** \ **Category:** Help\ **Created:** [March 22, 2025, 10:39pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469 "2025-03-22T22:39:14Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Stoxophone](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/stoxophone/32/38948_2.png) [@Stoxophone](https://forum.cursor.com/u/Stoxophone)\ **Post date:** [March 22, 2025, 10:39pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/1 "2025-03-22T22:39:15Z")
MacOS sequoia 15.3.1 Cursor v0.47.8 When adding servers to mcp.json, all servers in the MCP server list in cursor settings show an error when try to initialize: “failed to create client” or “client closed” Heres my server list (edited to remove API keys): ![image](https://us1.discourse-cdn.com/cursor1/original/3X/a/f/af1719cc57461caf9d2d6317a89a887c57909552.png) And my mcp.json: ```auto { "mcpServers": { "firecrawl-mcp-server": { "command": "npx", "args": ["-y", "firecrawl-mcp"], "env": { "FIRECRAWL_API_KEY": ... } } } } ``` Any other MCP server I try I get the same response. ---
**Author:** ![angushhz](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/angushhz/32/9291_2.png) [@angushhz](https://forum.cursor.com/u/angushhz)\ **Post date:** [March 23, 2025, 9:14am UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/2 "2025-03-23T09:14:44Z")
I have same issue with you. Everthing set up like example { “mcpServers”: { “firecrawl-mcp”: { “command”: “npx”, “args”: [ “-y”, “firecrawl-mcp” ], “env”: { “FIRECRAWL\_API\_KEY”: “■■■” } } } } ```auto Version: 0.47.8 VSCode Version: 1.96.2 Node.js: 20.18.1 V8: 12.8.374.38-electron.0 OS: Darwin arm64 24.1.0 ``` ![CleanShot 2025-03-23 at 16.14.05@2x](https://us1.discourse-cdn.com/cursor1/original/3X/d/b/db438dc3f020d92d39448ad6288301bf8f318df0.png) @ SSE error: TypeError: fetch failed: connect ECONNREFUSED 127.0.0.1:3000, connect ECONNREFUSED ::1:300C ---
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [March 23, 2025, 11:12am UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/4 "2025-03-23T11:12:09Z")
Hey, it’s working as expected for me. Also, make sure you have Node.js installed on your system. ![image](https://us1.discourse-cdn.com/cursor1/original/3X/2/c/2cefac349e0b48a738f4138fa4bc268090d2a6d7.png) ---
**Author:** ![Stoxophone](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/stoxophone/32/38948_2.png) [@Stoxophone](https://forum.cursor.com/u/Stoxophone)\ **Post date:** [March 23, 2025, 4:31pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/5 "2025-03-23T16:31:48Z")
Is this cursor v0.47.8? Actually you make a good point about Node.js. I’m using devbox for this project so all of my dependancies are handled through it, including node. Switching to `devbox run npx` as the command remedies the issue of no node installed, but the mcp server is still not able to initialize. ---
**Author:** ![angushhz](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/angushhz/32/9291_2.png) [@angushhz](https://forum.cursor.com/u/angushhz)\ **Post date:** [March 23, 2025, 4:43pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/6 "2025-03-23T16:43:42Z")
Absolutely. It’s so weird. I have using debug tool of MCP > **[Debugging - Model Context Protocol](https://modelcontextprotocol.io/docs/tools/debugging)** > > A comprehensive guide to debugging Model Context Protocol (MCP) integrations I can init it local when using this tool. I am try multiple node version \> 18 → 22. But i can’t start any MCP tools in cursor setting. idk Im run in mac os 15.3.2 apple m1 ![CleanShot 2025-03-23 at 23.42.22](https://us1.discourse-cdn.com/cursor1/original/3X/a/6/a611655db71298b7ab5ed6e49c339405e8adc3d0.png) ╰─ nvm list v10.16.0 → v14.18.0 v16.20.0 v18.20.4 v20.18.2 v22.13.1 system default → 14 (-\> v14.18.0) use → 14 (-\> v14.18.0) iojs → N/A (default) unstable → N/A (default) node → stable (-\> v22.13.1) (default) stable → 22.13 (-\> v22.13.1) (default) I have a question about your setting mcp server. If i setup it is not global setting mcp Which node version cursor will using for execute mcp ? ---
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [March 23, 2025, 4:50pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/7 "2025-03-23T16:50:56Z")
Hey, my version is 0.47.8. Maybe it doesn’t work with devbox. In this case, try configuring MCP for the project instead of using a global setup. ![image](https://us1.discourse-cdn.com/cursor1/original/3X/2/0/20709e3a44f867206786c3040a77bea49da62286.png) ---
**Author:** ![angushhz](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/angushhz/32/9291_2.png) [@angushhz](https://forum.cursor.com/u/angushhz)\ **Post date:** [March 23, 2025, 5:10pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/8 "2025-03-23T17:10:00Z")
Thank you for your reply. It make me doubt about version default of node in my enviroment. My default dev version in nvm is always 14.6 . Therefore i have change default to \> 20. Now MCP Servers work correctly . ![CleanShot 2025-03-24 at 00.09.49@2x](https://us1.discourse-cdn.com/cursor1/original/3X/6/a/6a68c782e9ccd860948fe09d86fd10234827fe42.png) ---
**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\ **Post date:** [April 22, 2025, 5:10pm UTC](https://forum.cursor.com/t/mcp-servers-wont-initialize/68469/9 "2025-04-22T17:10:18Z")
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