MCP server

Lob

io.github.pipeworx-io/lob

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Lob MCP — US address verification, bulk verification, and autocompletion

Working at last checkOfficial: pipeworx.io's GitHub account (pipeworx-io)About 27,409 tokens per request once connected45 tools

https://gateway.pipeworx.io/lob/mcp

At a glance

Type: MCP server
Publisher: pipeworx.io (verified by the MCP Registry)
Status: Working at last check
Tools: 45
Token cost: About 27,409 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

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://gateway.pipeworx.io/lob/mcp

Claude Desktop

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

Codex (config.toml)

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

Gemini CLI

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

Cursor

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

VS Code

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

Antigravity

agy mcp add lob https://gateway.pipeworx.io/lob/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://gateway.pipeworx.io/lob/mcp","require_approval":"always"}

Grok (xAI API tools)

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

lob_autocomplete ~285 tokens
Autocomplete a partial US address. Given a primary-line prefix (and optional city/state/zip), returns up to 10 full address suggestions. Suggestions are candidates, not guaranteed deliverable — verify with lob_verify_address. Example: lob_autocomplete({ address_prefix: "185 B", city: "San Francisco"
lob_verify_address ~449 tokens
Verify a single US address for deliverability and return USPS-standardized/corrected components (ZIP+4, DPV codes, county, lat/lon). Pass structured components (primary_line, city, state, zip_code) OR a single freeform `address` string — not both. Example: lob_verify_address({ primary_line: "185 Ber
lob_verify_bulk ~372 tokens
Verify a list of US addresses in one request. Each address is an object with primary_line, city, state, zip_code (secondary_line/recipient optional). Returns per-address deliverability + corrected components. Example: lob_verify_bulk({ addresses: [{ primary_line: "210 King St", city: "San Francisco"

Lob MCP by usefulapi
Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.
Qualisend Email Verification
Verify email addresses and clean lists to improve deliverability and sender reputation.
Verifai — Email Verification & Domain Intelligence
Email verification and domain intelligence for AI agents. MX, RDAP, SSL checks. 25 free credits.
Getlead
Find B2B leads with verified work emails, find and verify emails, and run cold email outreach.
MailTester Email Verification
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.
Dannet
DanNet - Danish WordNet with rich lexical relationships and SPARQL access.
UK company & compliance data
Companies House, Gazette notices, sanctions screening, LEIs and UK legislation.
BillionVerify
Email verification for AI agents: verify single or bulk emails, check credits and history.

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