# Crypto open interest data providers, compared on the facts

Open interest is the total number of outstanding derivatives contracts that have not been settled. These providers state on an official page that they offer open interest data. The table is alphabetical with no ranking; it is information only, not investment advice.

| Provider | Pricing | Free tier | REST | WebSocket | MCP | Source | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- |
| [CoinGlass API](https://tokvane.app/tools/coinglass-api) | from $29/month | No | Yes | unknown | unknown | https://docs.coinglass.com/ | 2026-10-29 |
| [Kaiko](https://tokvane.app/tools/kaiko) | from $1000/month | No | Yes | unknown | unknown | https://www.kaiko.com/products/market-data | 2026-10-29 |
| [Laevitas](https://tokvane.app/tools/laevitas) | from $50/month | Yes | Yes | Yes | Yes | https://www.laevitas.ch/ | 2026-10-29 |
| [Tardis.dev](https://tokvane.app/tools/tardis-dev) | from $1200/month | unknown | Yes | unknown | unknown | https://docs.tardis.dev/faq/data | 2026-10-29 |

**Which providers offer open interest data?**
Listed in our directory, alphabetically: CoinGlass API, Kaiko, Laevitas, Tardis.dev. Each names the dataset on an official page.

**Is there free open interest data?**
Free tier confirmed: Laevitas. Check the limits on the vendor page.

**Is this investment advice?**
No. Tokvane lists data providers. It gives no trading signals, price predictions or recommendations.

Information only, not financial or investment advice.