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Lob MCP — US address verification & standardization: single + bulk verification with USPS deliverability coding, plus address autocomplete. BYO Lob API key.

3 tools
0ms auth
free tier 50 calls/day

Tools

lob_verify_address

Verify a single US address for deliverability and return USPS-standardized/corrected components (ZIP+4, DPV codes, county, lat/lon).

No parameters required.

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lob_verify_bulk

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).

No parameters required.

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lob_autocomplete

Autocomplete a partial US address. Given a primary-line prefix (and optional city/state/zip), returns up to 10 full address suggestions.

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash 
curl -X POST https://gateway.pipeworx.io/lob/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash 
curl -X POST https://gateway.pipeworx.io/lob/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"lob_verify_address","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript 
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("lob_verify_address", {});
ask_pipeworx 
// Or ask in plain English:
const answer = await px.ask("lob mcp — us address verification & standardization: single + bulk verification with usps deliverability coding, plus address autocomplete");