MCP Server: io.usefulapi/lob

This MCP server verifies U.S. and international addresses and enables sending physical mail. It supports postcard and letter sending, as well as mailing checks, via Lob. The server is identified as io.usefulapi/lob and is focused on address verification and physical mail delivery workflows.

🛠️ Key Features

Verify U.S. and international addresses
Send physical mail through Lob
Support postcards, letters, and checks

🚀 Use Cases

Validate addresses before mailing postcards or letters
Send international mail requiring address verification
Mail checks using verified address details

⚡ Developer Benefits

Provides address verification for U.S. and international destinations
Supports physical mail actions (postcards, letters, checks) via Lob

⚠️ Limitations

Description does not specify additional methods, authentication details, or other capabilities beyond address verification and physical mail sending via Lob

Lob MCP by usefulapi

Verify addresses and send physical mail via Lob, from Claude, Cursor, or any MCP client. Hosted, no local install — connect with your Lob API key.

Live endpoint: https://lob.usefulapi.io/mcp · Homepage: https://usefulapi.io/lob

Add to Claude

json

{
  "mcpServers": {
    "lob": {
      "url": "https://lob.usefulapi.io/mcp"
    }
  }
}

On first connect you'll paste your Lob API key. It's validated, stored per-user, and scoped to you.

Tools

Tool	Type	What it does
`lob_verify_us_address`	read	Verify a US address
`lob_verify_intl_address`	read	Verify an international address
`lob_us_zip_lookup`	read	Look up a US ZIP code
`lob_us_autocomplete`	read	Autocomplete a US address
`lob_list_postcards`	read	List postcards
`lob_get_postcard`	read	Get a postcard
`lob_list_letters`	read	List letters
`lob_get_letter`	read	Get a letter
`lob_list_checks`	read	List checks
`lob_get_check`	read	Get a check
`lob_list_self_mailers`	read	List self-mailers
`lob_list_addresses`	read	List saved addresses
`lob_get_address`	read	Get a saved address
`lob_list_templates`	read	List templates
`lob_create_address`	write	Save an address record
`lob_create_postcard`	write	Send a postcard (COSTS MONEY)
`lob_create_letter`	write	Send a letter (COSTS MONEY)
`lob_cancel_postcard`	write	Cancel a scheduled postcard
`lob_usage_status`	meta	Usage status (free-tier meter)
`lob_upgrade`	meta	Upgrade to Pro (unlimited)

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage or manage your subscription.

Pricing

Plan	Price	Limit
Free	$0	100 tool calls / month
Pro	$9/mo or $90/yr (2 months free)	Unlimited

License

MIT — see LICENSE. Documentation only; the server is hosted.

Lob