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Connector plugin · listing tai42/connector-slack

Install

tai plugins install tai42/connector-slack --env CONNECTORS_SLACK_CLIENT_ID=... --env CONNECTORS_SLACK_CLIENT_SECRET=... --secret CONNECTORS_SLACK_CLIENT_SECRET

Permissions

Capability	Declared
Network	no
Subprocess	no
Filesystem	no

Provides

slack

Connector — OAuth connector for Slack over Slack’s hosted MCP server. Registers the slack connector: one OAuth connection per alias against Slack’s hosted MCP server at https://mcp.slack.com/mcp. The plugin is pure descriptor data and ships no package; the runtime’s connector engine runs the OAuth flow, seals the tokens, and reaches the MCP server over Streamable HTTP.

Install

Install the descriptor into the running server with the CLI:

tai plugins install tai42/connector-slack \
  --env CONNECTORS_SLACK_CLIENT_ID=... \
  --secret CONNECTORS_SLACK_CLIENT_SECRET

Or add the provider by hand as a manifest connectors: entry:

manifest.yml

connectors:
  - id: slack
    display_name: Slack
    description: Connect a Slack workspace over Slack's hosted MCP server.
    icon_url: https://raw.githubusercontent.com/tai42ai/tai42/main/plugins/connector-slack/icon.png
    kind: oauth
    origin: system
    category: communication
    oauth:
      authorize: https://slack.com/oauth/v2_user/authorize
      token: https://slack.com/api/oauth.v2.user.access
      revoke: null
    client_id_env: CONNECTORS_SLACK_CLIENT_ID
    client_secret_env: CONNECTORS_SLACK_CLIENT_SECRET
    sub_services:
      slack:
        id: slack
        display_name: Slack
        description: Read and post across channels, DMs, and search.
        scopes:
          - search:read
          - channels:read
          - channels:history
          - groups:read
          - groups:history
          - im:read
          - im:history
          - mpim:read
          - mpim:history
          - users:read
          - reactions:read
          - chat:write
        mcp_server:
          type: http
          url: https://mcp.slack.com/mcp

Create the Slack app

Create a Slack app and configure OAuth. The app must be directory-published or internal to your workspace — Slack refuses an unlisted app on this flow, and there is no dynamic client registration. These are USER-token endpoints:

authorize: https://slack.com/oauth/v2_user/authorize
token: https://slack.com/api/oauth.v2.user.access

Add this exact redirect URI, where {origin} is your deployment’s public origin (or CONNECTORS_OAUTH_BRIDGE_URL when you run a shared bridge):

{origin}/oauth-bridge.html

Then set the client credentials on the API process:

CONNECTORS_SLACK_CLIENT_ID=...
CONNECTORS_SLACK_CLIENT_SECRET=...

The engine-wide CONNECTORS_* settings — the key-encryption key (CONNECTORS_KEK), the state HMAC key (CONNECTORS_STATE_HMAC_KEY), and the redirect-URI allowlist (or CONNECTORS_OAUTH_BRIDGE_URL) — are shared by every connector and are described in Connectors. The origin you registered with Slack must appear in the redirect-URI allowlist, and it must be https for anything but a local host.

Verify the rotating-token response (before release)

Slack’s official documentation confirms this descriptor’s flow: the oauth.v2.user.access endpoint returns the user token at the top level (access_token, token_type: "user") — not nested under authed_user like the bot oauth.v2.access response — and /oauth/v2_user/authorize is the user-token authorize endpoint. The one detail Slack’s docs do not show in an explicit example is the rotation-enabled response body, so before release run one manual Connect against a rotation-enabled Slack dev app and confirm a top-level refresh_token and expires_in are present, as the OAuth 2.0 spec requires.

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Slack

Install

Permissions

Provides

slack

Install

Create the Slack app

Verify the rotating-token response (before release)

See also

​Install

​Permissions

​Provides

​slack

​Install

​Create the Slack app

​Verify the rotating-token response (before release)

​See also

Install

Permissions

Provides

slack

Install

Create the Slack app

Verify the rotating-token response (before release)

See also