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Mailjet MCP Integration for LangGraph

Connect Mailjet to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

9 functions 7 read 2 write API key auth
Submit Mailjet feedback View package source

Connect Mailjet to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

Mailjet MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "mcpServers": {
    "kosmokrator-mailjet": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=mailjet",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=mailjet --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Mailjet instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Mailjet Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the Mailjet integration catalog.

MCP toolSource functionTypeDescription
integration__mailjet__mailjet_send_email mailjet.mailjet_send_email Write Send an email via Mailjet. Specify sender, one or more recipients, subject, and HTML body.
integration__mailjet__mailjet_list_contacts mailjet.mailjet_list_contacts Read List contacts in the Mailjet account. Returns paginated contact data including email addresses and metadata.
integration__mailjet__mailjet_get_contact mailjet.mailjet_get_contact Read Get details for a single Mailjet contact by ID or email address.
integration__mailjet__mailjet_create_contact mailjet.mailjet_create_contact Write Create a new contact in Mailjet. Provide the email address to add.
integration__mailjet__mailjet_list_campaigns mailjet.mailjet_list_campaigns Read List email campaigns in the Mailjet account. Returns campaign IDs, subjects, and status.
integration__mailjet__mailjet_get_campaign mailjet.mailjet_get_campaign Read Get details for a single Mailjet email campaign by ID.
integration__mailjet__mailjet_list_templates mailjet.mailjet_list_templates Read List email templates available in the Mailjet account.
integration__mailjet__mailjet_get_stats mailjet.mailjet_get_stats Read Get email statistics from the Mailjet statcounters endpoint. Returns send, delivery, open, click, and bounce counts.
integration__mailjet__mailjet_get_current_user mailjet.mailjet_get_current_user Read Get the authenticated Mailjet user profile information.

Related Mailjet Pages

Mailjet CLIUse direct JSON commands instead of MCP discovery. Mailjet MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.