Notion MCP Error
# 🖥│support-forumj
JoelCodes
12/01/2025, 2:57 PM Copy code
{
"error": "Error: Error retrieving tool list from MCP server: 'Notion'. Http status code: 424 (Failed Dependency)"
}u
Uday
12/01/2025, 3:02 PMHey @JoelCodes, this is a common issue reported for OpenAI sdks. If you are using OpenAI, you'll find this information useful: https://community.openai.com/t/error-when-attempting-to-connect-my-remote-mcp-in-new-agent-builder/1361613/20
j
JoelCodes
12/01/2025, 3:16 PMThis is for their Agent builders UI, we use the AgentSDK programmatically
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Uday
12/01/2025, 3:20 PM@JoelCodes, you can check this: https://community.openai.com/t/424-error-code-on-mcp-server-connection/1271520
— Yes, as mentioned above, it is an issue with the OpenAI builder as well as the SDKs. Lmk if this is useful.
j
JoelCodes
12/01/2025, 3:26 PMWhy would it work with some MCP servers and not others tho ?
If OpenAI SDK is the same, what’s the difference between composio Slack and Notion MCP ?
u
Uday
12/01/2025, 3:36 PMUsers have occasionally reported this issue. Is it occurring everytime for Notion, while Slack MCP works fine?
j
JoelCodes
12/01/2025, 5:30 PMYup
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Uday
12/01/2025, 7:42 PMI see, we'll investigate the issue.
j
JoelCodes
12/02/2025, 8:56 PMSounds good
JoelCodes
12/05/2025, 7:50 PMAny update on this ?
b
Brendan O'Leary
12/05/2025, 10:59 PMHi there! We are still investigating and we should have an update next week for you. Thank you for your patience!
j
JoelCodes
12/06/2025, 7:01 PMThanks this was working a few weeks ago with no issues
JoelCodes
12/09/2025, 3:32 PMAny update on notion MCP ?
JoelCodes
12/10/2025, 6:52 PM@Uday Any updates on notion ?