# United States Postal Service (zip-codes.com)

Serves U.S. and Canadian postal code data, address validation and radius search through an API or downloadable databases.

- Atlas card: https://inite.ai/en/atlas/zip-codes.com
- Site: https://zip-codes.com
- For: Developers and teams adding US and Canadian postal code lookups, address validation, or radius search to their applications.
- Categories: dev
- Use not measured/100 · alive 100/100

## Used for

- validate and standardize US street addresses
- find zip codes within a radius of a location
- look up city, county and timezone from a postal code

## Price

- from 49 USD/month, free plan (read 2026-10-30 on https://zip-codes.com/api/Pricing)

## For developers

- API docs: https://zip-codes.com/api
- MCP server: com.zip-codes/api (namespace; open on 2026-10-20, 11 tools)
- Read 2026-10-20

## MCP server, measured daily

Server: https://mcp.zip-codes.com/mcp, checked every day since 2026-10-20 (13 checks).

- Answered: 100% of daily checks
- Median first answer: 182 ms
- Sign-in: none
- Context its tool definitions take: about 4876 tokens (11 tools)
- Tool definitions: A, 100/100
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-20

---

Source: INITE Atlas, https://inite.ai/en/atlas/zip-codes.com. JSON: https://inite.ai/api/atlas/zip-codes.com. MCP: https://inite.ai/api/mcp (atlas_lookup).