Open Topo Data

Overview

Open Topo Data is a free public API in the Geocoding category. Elevation and ocean depth for a latitude and longitude.

Geocoding APIs turn addresses into coordinates and back — essential for maps, logistics, and location-aware features.

You can use this API in prototypes, side projects, and production applications — just keep the provider’s usage policy in mind.

Authentication

Open Topo Data requires no authentication — you can start calling it directly, which makes it great for quick experiments and client-side demos.

HTTPS & CORS

• HTTPS: supported — traffic to Open Topo Data is encrypted, so it is safe to use from production apps.
• CORS: not enabled — call Open Topo Data from a server-side environment (Node, Python, Go, etc.) or through your own proxy.

Getting Started

1. Read the official documentation: https://www.opentopodata.org
2. Make a test request with curl or your favourite HTTP client.

Rate Limits & Notes

• Rate limits, quotas, and free-tier terms are defined by the provider — always check the official documentation for Open Topo Data before scaling up.
• The upstream listing is community-maintained; fields like auth, HTTPS and CORS reflect the state at listing time and may change.

FAQ

Does Open Topo Data require an API key?

No — Open Topo Data is listed as a no-auth API, so you can call it directly.