Mail & print · 2 tools

Lob

Send real postcards and letters through the mail with an API call.

ListedSource checked November 1

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Notes. Prices are 'starting at' and vary by format and volume. US-focused.

Mail a postcard

lob.send_postcard

From $0.905 per postcardListed

Print and mail a real postcard through Lob's Print & Mail API, with tracking events. Uses your own Lob API key.

Inputs

Name	Type	Description
`to`required	object
`from`	object
`front`required	string	HTML or URL of the front artwork
`back`required	string	HTML or URL of the back
`size`	string	one of: 4x6, 6x9, 6x11; default: "4x6"

Example output

Provider returns a postcard object (id psc_..., expected_delivery_date, tracking events).

Try it

Not connected yet: use Lob directly at lob.com . Calling it through our MCP returns this same message.

Call it

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "lob.send_postcard",
    "arguments": {
      "to": {
        "name": "Recipient",
        "address_line1": "123 Example St",
        "address_city": "Springfield",
        "address_state": "IL",
        "address_zip": "62701"
      },
      "front": "<html>Hello</html>",
      "back": "<html>From your agent</html>",
      "size": "4x6"
    }
  }
}

curl -sS -X POST https://www.realworldmcp.com/api/call/lob.send_postcard \
  -H 'content-type: application/json' \
  -d '{"to": {"name": "Recipient", "address_line1": "123 Example St", "address_city": "Springfield", "address_state": "IL", "address_zip": "62701"}, "front": "<html>Hello</html>", "back": "<html>From your agent</html>", "size": "4x6"}'

const res = await fetch("https://www.realworldmcp.com/api/call/lob.send_postcard", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"to": {"name": "Recipient", "address_line1": "123 Example St", "address_city": "Springfield", "address_state": "IL", "address_zip": "62701"}, "front": "<html>Hello</html>", "back": "<html>From your agent</html>", "size": "4x6"})
});
console.log(await res.json());

Mail a letter

lob.send_letter

From $0.828 per letterListed

Print and mail a real letter through Lob's Print & Mail API, with tracking events. Uses your own Lob API key.

Inputs

Name	Type	Description
`to`required	object
`from`required	object
`file`required	string	HTML, or URL of a PDF
`color`	boolean	default: false

Example output

Provider returns a letter object (id ltr_..., expected_delivery_date, tracking events).

Try it

Not connected yet: use Lob directly at lob.com . Calling it through our MCP returns this same message.

Call it

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "lob.send_letter",
    "arguments": {
      "to": {
        "name": "Recipient",
        "address_line1": "123 Example St",
        "address_city": "Springfield",
        "address_state": "IL",
        "address_zip": "62701"
      },
      "from": {
        "name": "Sender",
        "address_line1": "1 Sender Rd",
        "address_city": "Austin",
        "address_state": "TX",
        "address_zip": "78701"
      },
      "file": "<html>Letter body</html>",
      "color": false
    }
  }
}

curl -sS -X POST https://www.realworldmcp.com/api/call/lob.send_letter \
  -H 'content-type: application/json' \
  -d '{"to": {"name": "Recipient", "address_line1": "123 Example St", "address_city": "Springfield", "address_state": "IL", "address_zip": "62701"}, "from": {"name": "Sender", "address_line1": "1 Sender Rd", "address_city": "Austin", "address_state": "TX", "address_zip": "78701"}, "file": "<html>Letter body</html>", "color": false}'

const res = await fetch("https://www.realworldmcp.com/api/call/lob.send_letter", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"to": {"name": "Recipient", "address_line1": "123 Example St", "address_city": "Springfield", "address_state": "IL", "address_zip": "62701"}, "from": {"name": "Sender", "address_line1": "1 Sender Rd", "address_city": "Austin", "address_state": "TX", "address_zip": "78701"}, "file": "<html>Letter body</html>", "color": false})
});
console.log(await res.json());