# NexusAPI Geo Isoline

> NexusAPI Geo Isoline is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.122395/call, status unknown (last checked 2026-09-13).

Generates geographic isoline (isochrone/isodistance) contours around a point based on travel time or distance

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/geo/isoline
- Price: $0.122395/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-geo-isoline-87ad1f20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HNI8TtI59z5Q2n2CSn9Fh

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 nexusapi-geo-isoline-87ad1f20 -d '<json body>'
```

Example prompt: Can you generate an isoline showing everything reachable within a 20-minute drive from 123 Main Street, Austin TX — I need the polygon boundary as GeoJSON so I can display it on a map?

## When to prefer this

Use this endpoint when you need to compute reachable-area contours (isolines, isochrones, isodistance rings) programmatically without managing your own routing infrastructure. It's ideal for logistics coverage analysis, real estate catchment mapping, or any scenario where you need a geographic polygon representing travel-time or distance boundaries around a point, payable per-call with no API key setup.

## Known failure modes

- Invalid or unrecognizable location input returns an error or empty result
- Unsupported transportation mode may return a generic error
- Extremely large isoline requests (very long distances/times) may time out or return coarse polygons
- Ambiguous query string without explicit coordinates may produce incorrect origin point
- Network connectivity issues with underlying routing engine return 5xx errors

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns a geographic polygon or GeoJSON geometry representing the boundary of the area reachable from the input location within the specified time or distance threshold, along with metadata about the isoline such as mode of transport and contour value.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexusapi-geo-isoline-87ad1f20/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-virid.vercel.app](https://www.zero.xyz/host/nexus-api-virid.vercel.app/llms.txt)