The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →If an MCP server is not working in Cursor, start with View → Output → MCP Logs and use the error to identify whether the problem is startup, configuration, authentication, tool discovery, or networking. Then check the affected server’s settings rather than resetting every integration: Cursor says one MCP server’s crash or timeout does not necessarily affect the others.
1. Read MCP Logs to find the failing layer
Open Cursor’s Output panel and select MCP Logs. The logs can show server initialization, connection attempts, tool calls, and errors. Look for whether the failure happens before the server starts, during authentication, while connecting, or only when a tool is called. That distinction helps avoid changing settings unrelated to the error. See Cursor’s MCP reference and MCP integrations guide.
If you use a keyboard shortcut to open Output, check Cursor’s current shortcut reference for your operating system; the menu or panel route is the dependable alternative.
2. Make sure the server is enabled
In the editor, open Customize > MCPs and check that the server’s toggle is on. A disabled server will not load or appear in chat. Cursor’s CLI can also show and enable servers:
Free tools Windows power users keep installed
One-click scans. No signup required.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
agent mcp listshows configured servers and their status.agent mcp enable <identifier>enables a server by its identifier.
Use the identifier shown by the CLI rather than assuming it matches the server’s display name. See Cursor’s CLI MCP documentation.
3. Check which MCP configuration Cursor is using
Cursor supports project-level and global MCP configuration. If you edited an mcp.json file but nothing changed, confirm that it belongs to the workspace you have open or to the intended user-level configuration. The CLI follows the editor’s configuration precedence, so its reported configuration source can help identify which file is active.
This check is especially useful when a setup works in one project but not another. Cursor documents configuration and precedence in its MCP reference and CLI MCP documentation.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
4. Verify the command, endpoint, and transport
Local and remote MCP servers fail in different ways. A local server is launched with a command and arguments; a remote server connects to a URL and may require headers. Compare the values in the active configuration with the server provider’s instructions.
Recommended Free Tools
| Server type | Check |
|---|---|
| Local, typically stdio | Confirm the executable exists, the command and arguments are correct, and the process can start in Cursor’s environment. |
| Remote HTTP or SSE | Confirm the endpoint URL, required headers, and network reachability. Check that the configured transport matches what the server supports. |
Cursor’s MCP reference describes stdio, HTTP, and SSE transports. A server’s connection instructions should determine the correct values; do not substitute a transport or endpoint based on guesswork.
5. Check environment variables and authentication
A server may start from a terminal but fail inside Cursor if required environment variables are not available to the app. Cursor advises making shell-profile variables available to the application and restarting Cursor after changing the shell profile. Check that required credentials are present and complete any required OAuth sign-in.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
- Keep secrets in environment variables rather than putting them in screenshots or shared configuration.
- Use keys with only the permissions the server needs.
- Review the server’s code and security implications before connecting it to sensitive systems.
Cursor’s setup and security guidance is in its MCP integrations guide and MCP reference.
6. Check tool discovery separately from server connection
A server showing as connected does not prove that the particular tool you need is available. Inspect the tool inventory in chat, or use the CLI command below to list tools for a server:
agent mcp list-tools <identifier>
Check the listed names and any requirements shown. If the chat interface offers per-tool controls, confirm the needed tool is enabled for that interaction. Cursor documents status and tool-list commands in its CLI MCP documentation.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
7. Apply network fixes only when symptoms point to networking
If logs or connection behavior suggest a network problem, open Cursor Settings > Network > Run Diagnostics to check Cursor connectivity. For a corporate proxy that blocks HTTP/2 streaming, Cursor recommends setting HTTP Compatibility Mode to HTTP/1.1 and then restarting Cursor. For VPN-related DNS errors, fully restart Cursor; if the errors persist, check the operating system’s DNS resolver.
These steps address specific proxy, VPN, DNS, or connectivity symptoms. They are not general fixes for a malformed configuration, disabled server, or missing tool. See Cursor’s network, proxy, and remote connections guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.8. For Remote SSH, check the local and remote sides
With Remote SSH, the local machine makes AI requests while the remote host provides file access. A problem can therefore come from local internet access, pressure on remote CPU or memory, or an unstable SSH connection. Cursor recommends restarting Cursor after reconnecting because a dropped session can leave stale processes. Follow the Remote SSH and network guidance when the failure coincides with a remote-session issue.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
9. Re-add or update only the affected server
If the preceding checks point to a server-specific configuration or installation problem, record the current error and preserve any needed settings before changing it. Cursor recommends removing and re-adding a server as a troubleshooting step. For an npm-based server, its MCP reference describes removing the server, clearing npm’s cache, and adding it again. For custom server files, update the files locally and restart Cursor.
Because this step can discard or replace configuration, use it only when the diagnosis supports it. Cursor’s instructions are in the MCP integrations guide and MCP reference.
Quick Recap
Match the fix to the symptom
- Server fails to start: inspect MCP Logs, then verify the active configuration, command, arguments, and environment.
- Authentication or connection error: check credentials, OAuth completion, endpoint details, and—if indicated—network access.
- Connected, but no expected tool: inspect the tool list and any per-tool enablement rather than treating connection status as proof of tool availability.
- Failure only over a proxy, VPN, or Remote SSH: use the corresponding network or remote-session checks, not a blanket MCP reset.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
