Unable to connect to the mcp with the docker

[kaafivikrant]

Here are the logs:

2025-04-13T18:51:56.018Z [mongodb-lens] [info] Initializing server...
2025-04-13T18:51:56.043Z [mongodb-lens] [info] Server started and connected successfully
2025-04-13T18:51:56.044Z [mongodb-lens] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
Unable to find image 'furey/mongodb-lens:latest' locally
latest: Pulling from furey/mongodb-lens
6e771e15690e: Already exists
6943333fe3c9: Already exists
19f059763ac0: Already exists
422fec2897b5: Already exists
cb12c568c31a: Pulling fs layer
af2b6d934555: Pulling fs layer
fb39dce3b776: Pulling fs layer
649ba88cb6b5: Pulling fs layer
649ba88cb6b5: Waiting
af2b6d934555: Verifying Checksum
af2b6d934555: Download complete
cb12c568c31a: Download complete
cb12c568c31a: Pull complete
af2b6d934555: Pull complete
fb39dce3b776: Verifying Checksum
fb39dce3b776: Download complete
fb39dce3b776: Pull complete
649ba88cb6b5: Download complete
649ba88cb6b5: Pull complete
Digest: sha256:e80b69cd0d56fe84379064a7b28f1357210902f41f182c1e947d70658db70a0b
Status: Downloaded newer image for furey/mongodb-lens:latest
MongoDB Lens v9.1.0 starting…
2025-04-13T18:52:56.046Z [mongodb-lens] [info] Message from client: {"jsonrpc":"2.0","method":"notifications/cancelled","params":{"requestId":0,"reason":"Error: MCP error -32001: Request timed out"}}
2025-04-13T18:52:56.047Z [mongodb-lens] [info] Client transport closed
2025-04-13T18:52:56.051Z [mongodb-lens] [info] Server transport closed
2025-04-13T18:52:56.051Z [mongodb-lens] [info] Client transport closed
2025-04-13T18:52:56.051Z [mongodb-lens] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. console.error('...') in JavaScript, print('...', file=sys.stderr) in python) and it will appear in this log.
2025-04-13T18:52:56.052Z [mongodb-lens] [error] Server disconnected. For troubleshooting guidance, please visit our debugging documentation {"context":"connection"}
Exiting…
2025-04-13T18:52:56.329Z [mongodb-lens] [info] Server transport closed
2025-04-13T18:52:56.329Z [mongodb-lens] [info] Client transport closed
2025-04-13T19:01:22.163Z [mongodb-lens] [info] Initializing server...
2025-04-13T19:01:22.213Z [mongodb-lens] [info] Server started and connected successfully
2025-04-13T19:01:22.214Z [mongodb-lens] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
latest: Pulling from furey/mongodb-lens
6e771e15690e: Already exists
6943333fe3c9: Already exists
19f059763ac0: Already exists
422fec2897b5: Already exists
cb12c568c31a: Pulling fs layer
af2b6d934555: Pulling fs layer
fb39dce3b776: Pulling fs layer
649ba88cb6b5: Pulling fs layer
649ba88cb6b5: Waiting
af2b6d934555: Verifying Checksum
af2b6d934555: Download complete
cb12c568c31a: Verifying Checksum
cb12c568c31a: Download complete
cb12c568c31a: Pull complete
af2b6d934555: Pull complete
fb39dce3b776: Verifying Checksum
fb39dce3b776: Download complete
fb39dce3b776: Pull complete
649ba88cb6b5: Verifying Checksum
649ba88cb6b5: Download complete
649ba88cb6b5: Pull complete
Digest: sha256:e80b69cd0d56fe84379064a7b28f1357210902f41f182c1e947d70658db70a0b
Status: Downloaded newer image for furey/mongodb-lens:latest
Error parsing environment variable for config [logLevel]: Config [logLevel] is invalid: 'verbose'. Using default: info
MongoDB Lens v9.1.0 starting…
2025-04-13T19:01:59.762Z [mongodb-lens] [info] Initializing server...
2025-04-13T19:01:59.809Z [mongodb-lens] [info] Server started and connected successfully
2025-04-13T19:01:59.810Z [mongodb-lens] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
latest: Pulling from furey/mongodb-lens
Digest: sha256:e80b69cd0d56fe84379064a7b28f1357210902f41f182c1e947d70658db70a0b
Status: Image is up to date for furey/mongodb-lens:latest
Error parsing environment variable for config [logLevel]: Config [logLevel] is invalid: 'verbose'. Using default: info
MongoDB Lens v9.1.0 starting…
2025-04-13T19:02:59.813Z [mongodb-lens] [info] Message from client: {"jsonrpc":"2.0","method":"notifications/cancelled","params":{"requestId":0,"reason":"Error: MCP error -32001: Request timed out"}}
2025-04-13T19:02:59.814Z [mongodb-lens] [info] Client transport closed
2025-04-13T19:02:59.815Z [mongodb-lens] [info] Server transport closed
2025-04-13T19:02:59.815Z [mongodb-lens] [info] Client transport closed
2025-04-13T19:02:59.815Z [mongodb-lens] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. console.error('...') in JavaScript, print('...', file=sys.stderr) in python) and it will appear in this log.
2025-04-13T19:02:59.815Z [mongodb-lens] [error] Server disconnected. For troubleshooting guidance, please visit our debugging documentation {"context":"connection"}
Exiting…
2025-04-13T19:03:00.031Z [mongodb-lens] [info] Server transport closed
2025-04-13T19:03:00.031Z [mongodb-lens] [info] Client transport closed

Here is the config
"mongodb-lens": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"--network=host",
"--pull=always",
"-e",
"CONFIG_LOG_LEVEL='verbose'",
"furey/mongodb-lens",
"mongodb://localhost:27017/finnhub_test"
]
}

[kaafivikrant]

Additional information needed:

OS and version : macos and 15.4
How MongoDB was installed (native, Docker, etc.) : native, mongo compass
MongoDB version : MongoDB shell version v5.0.4
Is any MongoDB authentication configured : no its localhost, no auth
Firewall settings, if any : no
Are you running Cursor in the same network context as MongoDB? : I am doing this on the claude desktop

[furey]

Hi @kaafivikrant

Thanks for trying MongoDB Lens

Congratulations—you discovered a bug in the documentation 🙈 😅

- "-e", "CONFIG_LOG_LEVEL='verbose'",
+ "-e", "CONFIG_LOG_LEVEL=verbose",

I've just patched the README and also updated MongoDB Lens to handle single-quoted Docker -e env vars (i.e. you don't need to change your Claude Desktop config)

The next time you start Claude Desktop the latest version of furey/mongodb-lens should pull down and you should see verbose log statements which will help us debug why it's not working for you

I've replicated your Claude setup, configured it to connect to a MongoDB v5 instance, and its working for me…

mongodb-lens_discussions_8.mp4

…so it'll be interesting to see what your verbose logs say

Cheers

[kaafivikrant]

Hey @furey ,

Sorry for the late reply,

Here are the logs,

2025-04-26T07:45:27.671Z [mongodb-lens] [info] Initializing server...
2025-04-26T07:45:27.694Z [mongodb-lens] [info] Server started and connected successfully
2025-04-26T07:45:27.695Z [mongodb-lens] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
latest: Pulling from furey/mongodb-lens
Digest: sha256:9367d1152a91b41fab52f384cbf99756300cb1ff754b5dc75fe8e5f95f3bb256
Status: Image is up to date for furey/mongodb-lens:latest
MongoDB Lens v9.1.4 starting…
Connecting to MongoDB at: mongodb://localhost:27017/finnhub_test
Connection attempt 1 failed, retrying in 2 seconds…
2025-04-26T07:46:28.246Z [mongodb-lens] [info] Message from client: {"jsonrpc":"2.0","method":"notifications/cancelled","params":{"requestId":0,"reason":"Error: MCP error -32001: Request timed out"}}
2025-04-26T07:46:28.247Z [mongodb-lens] [info] Client transport closed
2025-04-26T07:46:28.248Z [mongodb-lens] [info] Server transport closed
2025-04-26T07:46:28.248Z [mongodb-lens] [info] Client transport closed
2025-04-26T07:46:28.249Z [mongodb-lens] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. console.error('...') in JavaScript, print('...', file=sys.stderr) in python) and it will appear in this log.
2025-04-26T07:46:28.249Z [mongodb-lens] [error] Server disconnected. For troubleshooting guidance, please visit our debugging documentation {"context":"connection"}
Received SIGTERM, shutting down…
Closing MongoDB client…
MongoDB client closed.
Clearing stats cache
Clearing fields cache
Clearing schemas cache
Clearing indexes cache
Clearing collections cache
Clearing serverStatus cache
Exiting…
2025-04-26T07:46:28.418Z [mongodb-lens] [info] Server transport closed
2025-04-26T07:46:28.418Z [mongodb-lens] [info] Client transport closed

Logs from direct terminal

Here is the config:
"mongodb-lens": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"--network=host",
"--pull=always",
"-e",
"CONFIG_LOG_LEVEL=verbose",
"furey/mongodb-lens",
"mongodb://localhost:27017/finnhub_test"
]
},

[kaafivikrant]

mongo --version
MongoDB shell version v5.0.4
Build Info: {
"version": "5.0.4",
"gitVersion": "62a84ede3cc9a334e8bc82160714df71e7d3a29e",
"modules": [],
"allocator": "system",
"environment": {
"distarch": "x86_64",
"target_arch": "x86_64"
}
}

[kaafivikrant]

Ok so I am getting this error only in the
mcp logs of claude desktop

2025-05-04T10:25:31.605Z [mongodb-lens] [info] Initializing server...
2025-05-04T10:25:31.659Z [mongodb-lens] [info] Server started and connected successfully
2025-05-04T10:25:31.669Z [mongodb-lens] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
latest: Pulling from furey/mongodb-lens
Digest: sha256:9367d1152a91b41fab52f384cbf99756300cb1ff754b5dc75fe8e5f95f3bb256
Status: Image is up to date for furey/mongodb-lens:latest
MongoDB Lens v9.1.4 starting…
Connecting to MongoDB at: mongodb://localhost:27017/small_finhub
Connection attempt 1 failed, retrying in 2 seconds…
2025-05-04T10:26:31.662Z [mongodb-lens] [info] Message from client: {"jsonrpc":"2.0","method":"notifications/cancelled","params":{"requestId":0,"reason":"Error: MCP error -32001: Request timed out"}}
2025-05-04T10:26:31.663Z [mongodb-lens] [info] Client transport closed
2025-05-04T10:26:31.664Z [mongodb-lens] [info] Server transport closed
2025-05-04T10:26:31.664Z [mongodb-lens] [info] Client transport closed
2025-05-04T10:26:31.664Z [mongodb-lens] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. console.error('...') in JavaScript, print('...', file=sys.stderr) in python) and it will appear in this log.
2025-05-04T10:26:31.664Z [mongodb-lens] [error] Server disconnected. For troubleshooting guidance, please visit our debugging documentation {"context":"connection"}
Received SIGTERM, shutting down…
Closing MongoDB client…
MongoDB client closed.
Clearing stats cache
Clearing fields cache
Clearing schemas cache
Clearing indexes cache
Clearing collections cache
Clearing serverStatus cache
Exiting…
2025-05-04T10:26:31.898Z [mongodb-lens] [info] Server transport closed
2025-05-04T10:26:31.898Z [mongodb-lens] [info] Client transport closed

but when I run the docker command directly in the terminal, it is working fine,
docker run --rm -i --network=host --pull=always -e CONFIG_LOG_LEVEL=verbose furey/mongodb-lens mongodb://host.docker.internal:27017/small_finhub

latest: Pulling from furey/mongodb-lens
6e771e15690e: Already exists
6943333fe3c9: Pull complete
19f059763ac0: Pull complete
422fec2897b5: Pull complete
d7c7f990074b: Pull complete
92f1294988fa: Pull complete
88ba55f1f86c: Pull complete
354b24598e1d: Pull complete
Digest: sha256:9367d1152a91b41fab52f384cbf99756300cb1ff754b5dc75fe8e5f95f3bb256
Status: Downloaded newer image for furey/mongodb-lens:latest
MongoDB Lens v9.1.4 starting…
Connecting to MongoDB at: mongodb://host.docker.internal:27017/small_finhub
Connected to MongoDB server version: 5.0.4
Connected to MongoDB successfully, using database: small_finhub
Starting watchdog…
DB Operation: Set slow query threshold to 100ms
Initializing MCP server…
Registering MCP resources…
Total MCP resources: 12
Registering MCP prompts…
Total MCP prompts: 14
Registering MCP tools…
Total MCP tools: 42
Creating stdio transport…
Connecting MCP server transport…
MongoDB Lens server running.