Cursor MCP not working checklist
Start with JSON, config location, command, env, startup, and Cursor reload checks.
Validation is intended to run locally in your browser. Do not paste real credentials, cookies, production values, or service-role values. Generated configs use placeholders and should be reviewed manually before use.
This checklist narrows common causes. It does not guarantee a fix for every MCP server, local environment, package, or Cursor version.
JSON invalid
Validate syntax first. Check missing commas, quotes, braces, and trailing commas.
Open related pageConfig location wrong
Confirm whether Cursor expects global config or project-level .cursor/mcp.json on your system.
Open related pageCommand not found
Review command path, package manager availability, and shell differences across operating systems.
Open related pageargs invalid
Confirm args is an array and each argument matches the server docs.
Open related pageenv missing
Use placeholder names in templates, then replace values locally outside this site.
Open related pagePermission or credential issue
Review scopes and never paste real credentials into this site.
Open related pageServer not started
Run manual checks locally and review server logs if your environment provides them.
Open related pageCursor not reloaded
Restart or reload Cursor after changing config. No checklist can guarantee every version behaves the same.
Open related pageWhat this page helps with
- Check common Cursor MCP setup issues without connecting accounts.
- Use placeholder-only examples and review every command manually.
- This page does not guarantee that a config or MCP server works in every environment.
Next steps for Cursor MCP setup
Validate MCP JSON
Check JSON syntax and common Cursor MCP structure issues locally.
Generate a config template
Create placeholder-based configs for common MCP server types.
Set up Cursor MCP
Follow a practical setup flow for config, reload, and verification.
Troubleshoot MCP issues
Work through invalid JSON, path, command, env, startup, and reload checks.
This site is an independent third-party setup helper and is not affiliated with, endorsed by, or sponsored by Cursor, Figma, GitHub, Slack, Supabase, or their owners. Brand names are used only to describe compatibility and setup context.
FAQ
Does this page upload my config?
No backend upload is required for the V0 tool flow. Pasted config should be processed in the browser.
Can it guarantee a fix?
No. It narrows common syntax, structure, setup, and permission issues only.
Should I paste real credentials?
No. Use placeholders only and replace values locally.