# OpenTopoData Terrain Elevation Lookup

> OpenTopoData Terrain Elevation Lookup is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns terrain elevation in metres for one or more geographic coordinates using OpenTopoData

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/elevation
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/opentopodata-terrain-elevation-lookup-123437b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8L04ye-1l2bcoVZcwt-uF

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 opentopodata-terrain-elevation-lookup-123437b0 -d '<json body>'
```

Example prompt: What's the terrain elevation in metres for these two locations: 40.7128,-74.0060 and 51.5074,-0.1278?

## When to prefer this

Use this endpoint when you need terrain elevation data (metres above sea level) for one or more specific lat/lon coordinates, especially for geospatial enrichment, route elevation profiling, or topographic analysis. Prefer this over general mapping APIs when you specifically need raw elevation values from OpenTopoData's DEM dataset.

## Known failure modes

- Invalid or out-of-range coordinates return an error or null elevation
- Malformed locations parameter format causes a 400 bad request
- Too many coordinates in a single request may exceed limits
- Network or upstream OpenTopoData service unavailability causes 5xx errors
- Missing locations parameter returns an error response

## How this service works

GEO: terrain elevation (metres) for one or more coordinates (?locations=lat,lon|lat,lon) via OpenTopoData. Returns JSON.

## Output

A JSON object containing elevation values in metres for each submitted coordinate pair, sourced from OpenTopoData's digital elevation model

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/opentopodata-terrain-elevation-lookup-123437b0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)