Cryptocurrency — entry 010 of 53
SoChain
Block.io's original wallet API has been fully folded into SoChain, the company's current product — both docs.block.io and block.io/api now redirect straight to chain.so, whose site footer still credits "Block.io, Inc." SoChain's v3 API serves Bitcoin, Dogecoin, and Litecoin (plus their testnets) with fast JSON responses for balances, transactions, and address data, and requires an API-KEY header on every call. There's no free tier: plans start at $149/month for 5,000 requests/day and scale to $1,999/month for 500,000/day.
GreatAPIs Score
Embed this badge
<a href="https://greatapis.com/api/block/"><img src="https://greatapis.com/badge/block.svg" alt="Scored 67 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Developer reference
5,000 requests/day (Starter plan, $149/mo); 50,000/day (Professional, $499/mo); 500,000/day (Behemoth, $1,999/mo), per chain.so/api/.