# Saylor Innovations Plant Hardiness Zone Lookup

> Saylor Innovations Plant Hardiness Zone Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns the USDA plant hardiness zone, minimum temperature range, and coordinates for a given U.S. ZIP code

## Facts

- Endpoint: GET https://saylorinnovations.com/api/plants/hardiness-zone/:zip?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-plant-hardiness-zone-lookup-a7d6953f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m5zGX6Qb6sXx-QDIhgVmb

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 saylor-innovations-plant-hardiness-zone-lookup-a7d6953f
```

Example prompt: What USDA plant hardiness zone is ZIP code 80203 in, and what's the minimum temperature range there?

## When to prefer this

Use this endpoint when you need a quick, low-cost lookup of the USDA plant hardiness zone for a specific U.S. ZIP code, especially when building gardening apps, plant recommendation engines, or agricultural tools that need zone and minimum temperature data keyed to a postal code.

## Known failure modes

- ZIP code not found in USDA dataset — returns found: false with null zone and temperature fields
- Invalid or non-U.S. ZIP code format — may return not found or an error
- Non-existent ZIP code returns found: false
- Network or upstream data source unavailability may cause errors

## How this service works

USDA plant hardiness zone for a U.S. ZIP code - zone, minimum temperature range and coordinates

## Output

A JSON object indicating whether the ZIP code was found, the USDA hardiness zone label (e.g. '7b'), the minimum temperature range in degrees Fahrenheit, the latitude and longitude of the ZIP code centroid, and the data source used for the lookup.

## 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",
    "pathParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "zip"
     ],
     "properties": {
      "zip": {
       "type": "string",
       "description": "U.S. ZIP code (path)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "found"
     ],
     "properties": {
      "zip": {
       "type": [
        "string",
        "null"
       ]
      },
      "zone": {
       "type": [
        "string",
        "null"
       ]
      },
      "found": {
       "type": "boolean",
       "description": "True when the lookup matched a record"
      },
      "source": {
       "type": [
        "string",
        "null"
       ],
       "description": "Data source the values come from"
      },
      "latitude": {
       "type": [
        "number",
        "null"
       ],
       "description": "Latitude in decimal degrees"
      },
      "longitude": {
       "type": [
        "number",
        "null"
       ],
       "description": "Longitude in decimal degrees"
      },
      "temperature_range_f": {
       "type": [
        "string",
        "null"
       ],
       "description": "Temperature range, in degrees Fahrenheit"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-plant-hardiness-zone-lookup-a7d6953f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)