Lumail MCP

The API-token endpoint is intended for trusted clients that need the wider catalog. Every request remains scoped to the organization that owns the token.

Create a token fromSettings → API Tokens, then add the Streamable HTTP endpoint to your client:

{ "mcpServers": { "lumail": { "url": "https://lumail.io/api/mcp/sse", "headers": { "Authorization": "Bearer lum_your_api_token_here" } } } }

For a stdio-only client, use an HTTP bridge:

{ "mcpServers": { "lumail": { "command": "pnpm", "args": [ "dlx", "mcp-remote", "https://lumail.io/api/mcp/sse", "--header", "Authorization: Bearer lum_your_api_token_here" ] } } }

Restart the MCP client after changing its configuration.

MCP clients receive the current tool names, descriptions, input schemas, and safety annotations during discovery. The same catalog is available over REST:

curl https://lumail.io/api/v2/tools \ -H "Authorization: Bearer lum_your_api_token_here"

Thev2in/api/v2/toolsis the Tools API version. Workflow tool names are canonical and unversioned.

There are no version-suffixed Workflow tools and no step-by-step mutation tools. A Workflow draft is configured as one complete{ steps, edges }graph.
- Callget_skillwith{ "type": "workflow" }.
- Uselist_workflowsorcreate_workflowto identify the target.
- Callget_workflowimmediately before editing and keep its exactupdatedAt.
- Resolve referenced tags, senders, snippets, campaigns, fields, goals, and groups with read tools.
- Callconfigure_workflow_draftonce with the complete steps and edges plusexpectedUpdatedAt.
- Read the Workflow back, inspect every configured internal email withget_campaign, and verify each render withrender_campaign.

configure_workflow_draftcreates or updates the internalWORKFLOWcampaign owned by each EMAIL step. Do not callcreate_campaignfor Workflow emails and do not attach broadcast campaigns directly.

Draft configuration never publishes or sends. Publishing and activation are separate, confirmation-gated actions.

The full catalog also includes tools for:

Useget_skillbefore specialized operations such as Workflow graph configuration or email copywriting. Pass{ "type": "docs" }to list every product docs page, then{ "type": "docs", "page": "<slug>" }to read one. Use the schema returned by discovery rather than guessing parameter names.

High-impact tools use a two-call confirmation flow. The first call returnsCONFIRMATION_REQUIREDwith a five-digitconfirmationCode. Show the proposed action to the user, then repeat the exact same tool call with that code within five minutes.

Codes are single-use, expire after five minutes, and are bound to the organization, tool, and exact input.

Create a welcome Workflow draft with three emails over seven days. Keep it unpublished, then show me the rendered text and links for every email.

List my paused Workflows and explain which published version each one uses. Do not activate anything.

Tools do not appear:restart the MCP client, verify the endpoint, and confirm that the token belongs to the intended organization.

Unauthorized:create a new organization API token or reconnect the OAuth integration.

Workflow changed since it was read:callget_workflowagain, merge intentionally, and retry with the newupdatedAt.

Confirmation required:repeat the same call with the returned code. Changing another input creates a different confirmation challenge.

- Workflow guide
- Tools API
- Tools API reference
- Claude MCP setup
- Cursor MCP setup
- API tokens

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