OptimistFi Perps
Funding, open interest, prices and leverage caps for perps on 40+ venues, in one schema

Bitcoin, Litecoin, Dogecoin and Zcash addresses, transactions, blocks and fees.
SoChain API is a free Cryptocurrency API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Online · 1442 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
The SoChain API v3: balances, transactions, blocks, the mempool and prices for Bitcoin, Litecoin, Dogecoin and Zcash, from REST or your AI agent.
Details from sochain.com.

Crypto rates from one simple API
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Funding, open interest, prices and leverage caps for perps on 40+ venues, in one schema
On-chain and market metrics for Bitcoin, Ethereum and more, computed from self-hosted nodes
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The SoChain API is provided by SoChain (sochain.com). The SoChain API v3: balances, transactions, blocks, the mempool and prices for Bitcoin, Litecoin, Dogecoin and Zcash, from REST or your AI agent.
Yes. The SoChain API is listed in the Cryptocurrency category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The SoChain API requires no authentication, so you can start making requests without signing up.
Yes. The SoChain API supports CORS, so front-end JavaScript can call it directly.
Yes. The SoChain API is served over HTTPS, so it's safe to use in production.
Show that SoChain is listed on Public APIs. The badge displays its developer rating once it has one.
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