Postal Code Lookup

Look up a postal or ZIP code in 60+ countries: city, region and approximate coordinates.

Pay by wallet (x402) postal-code-lookup

Example

Input

{
  "postal_code": "10001",
  "country_code": "US"
}

Answer

{
  "valid": true,
  "places": [
    {
      "name": "New York City",
      "state": "New York",
      "latitude": 40.7484,
      "longitude": -73.9967,
      "state_abbreviation": "NY"
    }
  ],
  "postal_code": "10001",
  "country_code": "US",
  "country_name": "United States"
}

Inputs

Field	Type	Required	What it is
`postal_code`	string	Yes	Postal/ZIP code to look up
`country_code`	string	No	ISO 2-letter country code (default US)

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`valid`	boolean	Always (present in every successful answer)
`places`	array	Always (present in every successful answer)
`postal_code`	string	Always (present in every successful answer)
`country_code`	string	Always (present in every successful answer)
`country_name`	string	Usually (present for most inputs)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "postal-code-lookup",
    "inputs": {
      "postal_code": "10001",
      "country_code": "US"
    },
    "max_price_cents": 2
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "postal-code-lookup",
    "inputs": {
      "postal_code": "10001",
      "country_code": "US"
    },
    "max_price_cents": 2
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "postal-code-lookup",
  inputs: {
    "postal_code": "10001",
    "country_code": "US"
  },
  max_price_cents: 2,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="postal-code-lookup",
    inputs={
        "postal_code": "10001",
        "country_code": "US",
    },
    max_price_cents=2,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i 'https://api.strale.io/x402/v2/postal-code-lookup?postal_code=10001&country_code=US'

Limitations

Country coverage
Covers ~60 countries — some smaller nations may not have postal code data available
Reference data freshness
Postal code data is periodically updated — newly created codes may not be available immediately