Home / Servers / Slack API / users_lookup_by_email

Find a user with an email address.

An MCP tool from the Slack API server, hosted on mcp.hjlabs.in.

Find a user with an email address. [GET /users.lookupByEmail]

Name on the gateway: slack_api__users_lookup_by_email · read-only.

Parameters

Name	Type	Description
`token` required	`string`	Authentication token. Requires scope: users:read.email
`email` required	`string`	An email address belonging to a user in the workspace

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments

{
  "name": "slack_api__users_lookup_by_email",
  "arguments": {
    "token": "…",
    "email": "…"
  }
}

Or connect the Slack API server directly, which lists 174 tools including this one:

Run in your terminal

claude mcp add --transport http hj-slack-api https://mcp.hjlabs.in/mcp/slack-api \
  --header "Authorization: Bearer YOUR_API_KEY"

Use the find a user with an email address. tool with token set to ….