MCP server

SendFlit runs an MCP (Model Context Protocol) server at https://mcp.sendflit.com/mcp. AI agents connect to it with a SendFlit API key and can call tools to send email, manage contacts and lists, and work with broadcasts and automations.

Connect an agent

The server speaks JSON-RPC 2.0 over HTTP. Send every request as a POST. A GET returns a 405 error, not the tool list. Authenticate with your API key as a bearer token:

curl -X POST https://mcp.sendflit.com/mcp \
  -H "Authorization: Bearer $SENDFLIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "id": 1, "method": "tools/list"}'

tools/list returns the tools that the calling key may use. A key with a narrow scope sees fewer tools.

Permissions

Every tool call is a real request to the matching REST endpoint, with the same key. A tool gets exactly what the endpoint allows: scope checks, validation, quotas, and the content check on broadcasts. An agent can’t do more through MCP than its key can do over HTTP. Agent keys can also have limits and require approval for certain actions. Configure these in the dashboard.

Tools

Area	Tools
Account and metrics	`get_account`, `get_metrics`
Sending	`send_email`, `schedule_email`, `list_emails`
Contacts and lists	`add_contact`, `track_event`, `list_lists`, `create_list`, `add_to_list`, `list_segments`, `preview_audience`, `create_segment`
Templates	`list_templates`, `create_template`, `render_design`
Broadcasts	`list_broadcasts`, `get_broadcast`, `create_broadcast`, `update_broadcast`, `send_broadcast`
Automations	`list_automations`, `get_automation`, `create_automation`, `update_automation`, `start_automation`, `pause_automation`
Forms and requests	`list_forms`, `create_form`, `get_request`
Domains	`add_domain`
AI assistance	`ai_compose`, `ai_subjects`, `ai_insights`, `ai_segment`, `ai_automation`

Errors

A call that fails on its input returns a result with isError set and the reason in the text, so an agent can correct its input and try again. A call the key isn’t allowed to make returns a JSON-RPC error.

Get started

Core concepts

Tutorials

Guides

DNS guides

Connect an agent

Permissions

Tools

Errors

​Connect an agent

​Permissions

​Tools

​Errors

Connect an agent

Permissions

Tools

Errors