MCP (Model Context Protocol) server for [PostalDataPI](https://postaldatapi.com) — lets AI agents look up, validate, and search postal codes across
Most developer tooling work still happens through a UI a human drives. Postaldatapi MCP MCP server moves it into the conversation instead. MCP (Model Context Protocol) server for PostalDataPI — lets AI agents look up, validate, and search postal codes across 240+ countries and territories with rich metadata: timezone, administrative regions.
The server publishes 4 tools. What each one is for:
lookup_postal_code — Get city, state/region, and abbreviation for a postal code (US ZIP, UK postcode, German PLZ, etc.)validate_postal_code — Check if a postal code exists in a countrysearch_by_city — Find all postal codes for a cityget_postal_code_metadata — Full metadata: coordinates, admin hierarchy, timezone, elevation, and moreConfiguration is passed through the environment: POSTALDATAPI_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
postaldatapi-mcp on PyPI is all you need. Most clients run it directly, so configuration is a few lines and a restart.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Postaldatapi MCP's toolset — lookup_postal_code, validate_postal_code, search_by_city and 1 more — is a fair guide to whether it matches your workflow. It is maintained by postaldatapi; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| lookup_postal_code | Get city, state/region, and abbreviation for a postal code (US ZIP, UK postcode, German PLZ, etc.) |
| validate_postal_code | Check if a postal code exists in a country |
| search_by_city | Find all postal codes for a city |
| get_postal_code_metadata | Full metadata: coordinates, admin hierarchy, timezone, elevation, and more |
{
"mcpServers": {
"postaldatapi": {
"command": "postaldatapi-mcp",
"env": {
"POSTALDATAPI_KEY": "your_api_key_here"
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| POSTALDATAPI_KEY | Credential the server authenticates with. | Yes |
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