MCP server

Lob MCP by usefulapi

io.usefulapi/lob

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.

Website Source

At a glance

Type

MCP server

Publisher

usefulapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

18

Token cost

About 4,081 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http lob https://lob.usefulapi.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.lob]
url = "https://lob.usefulapi.io/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"lob":{"type":"http","url":"https://lob.usefulapi.io/mcp"}}}

Antigravity

agy mcp add lob https://lob.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"lob","server_url":"https://lob.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"lob","server_url":"https://lob.usefulapi.io/mcp"}

Tools

• lob_cancel_postcard ~112 tokens
  Cancel a postcard before its send_date so it is never mailed (and not billed). Fails if the send window has passed. Lob API: DELETE /v1/postcards/{id}.
• lob_create_address ~274 tokens
  Create a reusable saved address record (does NOT send any mail). Returns an address id (adr_…) usable as `to`/`from` in mail tools. Lob API: POST /v1/addresses.
• lob_create_letter ~822 tokens
  ⚠️ SENDS A REAL LETTER and charges your Lob account (use a test_ key to avoid real mail/charges). `to`/`from` accept an address id (adr_…) or inline object. `file` accepts an HTML string, a hosted PDF/URL, or a template id (tmpl_…). `color` is required. Cancelable only before `send_date`. Lob API: P
• lob_create_postcard ~807 tokens
  ⚠️ SENDS A REAL POSTCARD and charges your Lob account (use a test_ key to avoid real mail/charges). `to` and `from` accept an existing address id (adr_…) or an inline address object. `front`/`back` accept an HTML string, a hosted asset URL, or a template id (tmpl_…). Cancelable only before `send_dat
• lob_get_address ~87 tokens
  Retrieve a single saved address record by id. Lob API: GET /v1/addresses/{id}.
• lob_get_check ~93 tokens
  Retrieve a single check by id, including amount, status, and check number. Lob API: GET /v1/checks/{id}.
• lob_get_letter ~94 tokens
  Retrieve a single letter by id, including status, PDF url, and tracking. Lob API: GET /v1/letters/{id}.
• lob_get_postcard ~98 tokens
  Retrieve a single postcard by id, including status, PDF url, and expected delivery. Lob API: GET /v1/postcards/{id}.
• lob_list_addresses ~158 tokens
  List saved address records, newest first. Lob API: GET /v1/addresses.
• lob_list_checks ~156 tokens
  List sent/scheduled checks, newest first. Lob API: GET /v1/checks.
• lob_list_letters ~157 tokens
  List sent/scheduled letters, newest first. Lob API: GET /v1/letters.
• lob_list_postcards ~159 tokens
  List sent/scheduled postcards, newest first. Lob API: GET /v1/postcards.
• lob_list_self_mailers ~162 tokens
  List sent/scheduled self-mailers, newest first. Lob API: GET /v1/self_mailers.
• lob_list_templates ~164 tokens
  List saved HTML templates usable as postcard/letter artwork. Lob API: GET /v1/templates.
• lob_us_autocomplete ~188 tokens
  Suggest complete US addresses from a partial primary line — useful for address entry. Non-mutating. Lob API: POST /v1/us_autocompletions.
• lob_us_zip_lookup ~104 tokens
  Return the cities and state associated with a US ZIP code. Non-mutating. Lob API: POST /v1/us_zip_lookups.
• lob_verify_intl_address ~192 tokens
  Validate & standardize a non-US address. `country` (2-letter ISO code) is required. Non-mutating (no mail sent). Lob API: POST /v1/intl_verifications.
• lob_verify_us_address ~254 tokens
  Validate & standardize a US address, returning deliverability, corrected components, and a confidence score. Pass either a single freeform `address` string OR structured `primary_line`/`city`/`state`/`zip_code`. Non-mutating (no mail sent). Lob API: POST /v1/us_verifications.

Browse

• PDF tools

Related MCP servers

• Post Agent
  Print & mail PDF/HTML/Markdown/text/DOCX/images to US addresses; pay per call in x402 USDC on Base.
• Theaslangroupllc Pulsenetwork
  914 paid market-data & token-safety endpoints — keyless x402 USDC: Base, Solana, XRPL, +8 chains
• Spur
  Real estate leads, skip tracing, direct mail, SMS & email outreach, and marketing automations
• DirectMailAmerica
  Send one or many U.S. letters, Certified Mail and postcards; manage both email-to-mail services.
• Sendpaper
  Your agent sends real postcards and letters. You approve; we print and mail.
• Print and Mail Company
  Print and mail real letters worldwide from the EU, incl. registered mail. Quote, compose, send.
• EasyPost MCP by usefulapi
  MCP server for EasyPost — rate shipments, buy & refund labels, track packages, verify addresses.
• PaperAgent — Send Physical Mail
  Mail one-off USPS letters from ChatGPT or Claude after you approve the preview and price. US only.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/io.usefulapi/lob.svg)](https://aptlynx.net/servers/io.usefulapi/lob)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents