Blockchain — entry 004 of 11
Covalent
Covalent's blockchain-data platform rebranded to GoldRush, unifying wallet balances, transaction history, NFT ownership, and token/DEX pricing across 100+ EVM and non-EVM chains behind one API, plus JSON-RPC endpoints for 30+ EVM networks. New accounts get a 14-day trial (25,000 credits) before moving to a paid plan or per-request (x402) billing with no monthly minimum. All data comes back as JSON.
GreatAPIs Score
Embed this badge
<a href="https://greatapis.com/api/covalent/"><img src="https://greatapis.com/badge/covalent.svg" alt="Scored 75 on greatapis.com"></a>Auth quickstart
- Get a key at the provider
- 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
Free 14-day trial: 25,000 API credits/month, 4 requests/second; Vibe Coding tier ($10/mo): 10,000 credits/month, 4 requests/second; Professional ($250/mo): 300,000 credits/month, 50 requests/second; x402 pay-per-request: 100 requests/minute per wallet