Can I use Lob as a CLI?

Yes. KosmoKrator exposes a Lob CLI through kosmo integrations:call and the provider shortcut command. Commands can return JSON for scripts, CI, and coding agents.

Can I expose Lob through MCP?

Yes. The KosmoKrator MCP gateway can expose selected Lob tools to clients such as Claude Code, Cursor, Codex, and other MCP-compatible tools.

Where are Lob credentials stored?

Lob credentials are configured in KosmoKrator's local integration settings and reused by CLI, Lua, and MCP gateway surfaces.

Can I deny write access for Lob MCP tools?

Yes. Start the gateway with --write=deny for read-only clients, or use ask/allow only for trusted workspaces.

Lob MCP Integration for CrewAI

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

7 functions 5 read 2 write API key auth

Submit Lob feedback View package source

Connect Lob to CrewAI

Expose KosmoKrator integrations to CrewAI workers as scoped local tools.

Wrap kosmo integrations:call for specific tasks or connect workers to a local MCP gateway. The gateway is local, scoped to this integration, and starts with --write=deny so CrewAI can inspect read-capable tools without receiving write access by default.

Lob MCP Config for CrewAI

Use per-worker integration scopes to avoid giving every worker every tool.

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Lob 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.

Lob Tools Visible to CrewAI

CrewAI sees stable MCP tool names generated from the Lob integration catalog.

MCP tool	Source function	Type	Description
`integration__lob__lob_list_letters`	`lob.lob_list_letters`	Read	List letters with pagination. Returns a page of letter objects sorted by creation date (newest first).
`integration__lob__lob_get_letter`	`lob.lob_get_letter`	Read	Retrieve details of a specific letter by its Lob ID, including delivery status, tracking info, and the letter URL.
`integration__lob__lob_create_letter`	`lob.lob_create_letter`	Write	Create and send a letter via Lob. Provide recipient and sender addresses (as address IDs or inline address objects), plus an HTML file or template ID for the letter content.
`integration__lob__lob_list_postcards`	`lob.lob_list_postcards`	Read	List postcards with pagination. Returns a page of postcard objects sorted by creation date (newest first).
`integration__lob__lob_get_postcard`	`lob.lob_get_postcard`	Read	Retrieve details of a specific postcard by its Lob ID, including delivery status, tracking info, and thumbnails.
`integration__lob__lob_create_postcard`	`lob.lob_create_postcard`	Write	Create and send a postcard via Lob. Provide recipient and sender addresses (as address IDs or inline address objects), plus HTML or template IDs for the front and back.
`integration__lob__lob_get_current_user`	`lob.lob_get_current_user`	Read	List saved addresses in the Lob account. Returns all verified addresses that can be used as sender or recipient for letters and postcards.

Related Lob Pages

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