Chat API returns 404 using bundled OAuth credentials

[rschnitz]

Problem

Google Chat tools (list_spaces, get_messages, search_messages) return a 404 error:

HttpError 404 when requesting https://chat.googleapis.com/v1/spaces?pageSize=10&alt=json
returned "Google Chat app not found. To create a Chat app, you must turn on the Chat API
and configure the app in the Google Cloud console."

Context

• Using the bundled OAuth client credentials (project 215373412892)
• Upgraded to latest version after PRs feat(chat): People API sender resolution, rich links, threads, and reactions #482, Add chat.spaces.readonly scope for listing spaces #484, enh: Refresh flow when scopes change since last authorization #486, Add chat attachment support: surface metadata and download files #488 merged (Feb 18-19)
• Deleted cached credentials and re-authenticated to pick up new scopes
• Gmail, Drive, Docs, Calendar, Sheets, Tasks all work fine
• Only Chat tools fail

Root cause (likely)

The Chat API needs to be enabled on the GCP project that hosts the bundled OAuth client ID. PRs #484 and #486 added the correct OAuth scopes (chat.spaces.readonly, etc.), but the underlying GCP project may not have the Google Chat API enabled yet.

Steps to reproduce

1. Install latest workspace-mcp
2. Authenticate with any Google Workspace account
3. Call list_spaces
4. Get 404 error

Expected behavior

list_spaces should return the user's accessible Chat spaces.

Environment

• workspace-mcp latest (post v1.11.2, includes PRs Add chat.spaces.readonly scope for listing spaces #484, enh: Refresh flow when scopes change since last authorization #486, Add chat attachment support: surface metadata and download files #488)
• macOS, Claude Code MCP client
• Google Workspace account (business domain)

[taylorwilsdon]

Hey there, your root cause is correct - it's nothing to do with workspace mcp, you just need to enable the chat spaces API in your GCP console and then create a chat app for the workspace mcp under the second link it gives you.

The links appear to be:

• https://console.cloud.google.com/marketplace/product/google/chat.googleapis.com < to enable the chat apis in general
• https://console.cloud.google.com/apis/api/chat.googleapis.com/hangouts-chat < to configure the google chat app (needs a logo, name etc)

  ⎿  Error: Error calling tool 'list_spaces': API error in list_spaces: <HttpError
     404 when requesting
     https://chat.googleapis.com/v1/spaces?pageSize=100&alt=json returned "Google
     Chat app not found. To create a Chat app, you must turn on the Chat API and
     configure the app in the Google Cloud console.". Details: "[{'@type':
     'type.googleapis.com/google.rpc.Help', 'links': [{'description': 'To turn on
     the Google Chat API, go to the Google Chat API page in the Google Cloud
     console and click Enable.', 'url': 'https://console.cloud.google.com/marketpla
     ce/product/google/chat.googleapis.com'}]}, {'@type':
     'type.googleapis.com/google.rpc.Help', 'links': [{'description': 'To configure
      your Chat app, go to the Google Chat API Configuration tab in the Google
     Cloud console.', 'url': 'https://console.cloud.google.com/apis/api/chat.google
     apis.com/hangouts-chat'}]}, {'@type': 'type.googleapis.com/google.rpc.Help',
     'links': [{'description': 'To learn about creating Google Chat apps, visit the
      documentation.', 'url': 'https://developers.google.com/chat'}]}]">