# Citiview Isochrone API

> Citiview Isochrone API is a paid API for AI agents from agents.citiviewgroup.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-14).

Returns GeoJSON polygons showing the reachable area from a location within specified time (minutes) or distance (km) ranges by car, truck, bike, walking, or transit — up to 3 ranges at once.

## Facts

- Endpoint: GET https://agents.citiviewgroup.com/v1/isochrone?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citiview-isochrone-api-9c43ea01
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XVusHOXAfin0UErQQDvW-

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 citiview-isochrone-api-9c43ea01
```

Example prompt: Show me the reachable area from 40.7128, -74.0060 within 10 and 20 minutes by car — I need the GeoJSON polygons with area in km² for delivery zone planning.

## When to prefer this

Choose this endpoint when you need precise GeoJSON isochrone polygons (reachable-area boundaries) for routing-based travel modes including driving, walking, cycling, and transit. Ideal for delivery zone visualization, store catchment analysis, and commute radius mapping where you need up to 3 concentric range rings in a single API call at a very low per-call cost.

## Known failure modes

- Invalid or out-of-range coordinates return an error
- Unsupported travel mode string returns a bad request
- Minutes value exceeding 60 or invalid pipe-separated format returns an error
- Missing required lat/lon or near parameter causes a 400 error
- Network timeout for complex routing in dense urban areas
- Location not found when using a place name string that is ambiguous

## How this service works

Reachable area from a place within N minutes (or km) by car, truck, bike, walking or transit, up to 3 ranges at once: GeoJSON polygons with area in km². For delivery zones, catchment areas and commute searches.

## Output

Returns GeoJSON polygon features representing the reachable area for each requested time or distance range, along with the area of each polygon in km². Up to 3 isochrone boundaries can be returned in a single call.

## 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",
     "properties": {
      "km": {
       "type": "string",
       "description": "For type=distance"
      },
      "lat": {
       "type": "number"
      },
      "lon": {
       "type": "number"
      },
      "mode": {
       "type": "string",
       "description": "drive (default), walk, bicycle, transit, ..."
      },
      "near": {
       "type": "string"
      },
      "type": {
       "type": "string",
       "description": "time (default) or distance"
      },
      "minutes": {
       "type": "string",
       "description": "1-60, up to 3 separated by |"
      }
     }
    }
   },
   "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/citiview-isochrone-api-9c43ea01/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.citiviewgroup.com](https://www.zero.xyz/host/agents.citiviewgroup.com/llms.txt)