# ZIP/Postal Code Lookup

> ZIP/Postal Code Lookup is a paid API for AI agents from mcpfax-utility.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-21).

Resolves a ZIP or postal code to its corresponding place names and geographic coordinates.

## Facts

- Endpoint: GET https://mcpfax-utility.bowling-anthony.workers.dev/v1/zip?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zip-postal-code-lookup-0839ec9d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K6ocuaYx-3sZvNjsSStnS

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability zip-postal-code-lookup-0839ec9d
```

Example prompt: What city and coordinates does ZIP code 10001 belong to?

## When to prefer this

Use this endpoint when you have a ZIP or postal code and need to resolve it to a human-readable place name and/or coordinates. Ideal for enriching address data, geocoding user-entered postal codes, or validating delivery zones. Prefer this over a full geocoding API when you only have a postal code (not a full street address).

## Known failure modes

- Invalid or nonexistent ZIP/postal code returns an error or empty result
- Postal codes with multiple matching places may return multiple entries
- Non-US postal codes may have incomplete or missing data depending on coverage
- Malformed input (e.g. wrong format for the country) returns a validation error

## How this service works

Postal code lookup — ZIP/postal code → place(s) & coordinates.

## Output

Returns the place or places associated with the given ZIP/postal code, including city/locality name, administrative region (state/province), country, and geographic coordinates (latitude and longitude).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zip-postal-code-lookup-0839ec9d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-utility.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-utility.bowling-anthony.workers.dev/llms.txt)