published

Covalent API

The Covalent API offers developers free access to aggregate blockchain data from over 100 networks, facilitating the building of multi-chain applications.

Developed by Covalent

View Source
99.96%Uptime
180msLatency
2.6kStars
API KeyAuth
NoCredit Card
RESTStyle
v1Version
API Endpoints

Reference for available routes, request structures, and live examples.

Retrieve token balances for an Ethereum address

Full Endpoint URL
https://api.covalenthq.com/v1/1/address/0x.../balances_v2/
Implementation Example
curl -X GET 'https://api.covalenthq.com/v1/1/address/0x.../balances_v2/' \
  -H 'Authorization: Bearer YOUR_API_KEY'
Request Payload
{
  "nft": false
}
Expected Response
{
  "data": {
    "items": [
      {
        "balance": "1000000000000000000",
        "contract_name": "Ethereum"
      }
    ],
    "address": "0x..."
  }
}
Version:v1
Limit:5,000 requests/month (free tier)
Real-World Applications
  • Building multi-chain crypto wallet appsOptimized Capability
  • Powering DeFi analytics dashboardsOptimized Capability
  • Aggregating NFT metadata for marketplacesOptimized Capability
  • Generating tax reporting tools for crypto portfoliosOptimized Capability
  • Integrating blockchain data into data science and analytics pipelinesOptimized Capability
Advantages
  • ✓ Supports 100+ blockchains out-of-the-box
  • ✓ Unified, normalized data schema across chains
  • ✓ Comprehensive, granular transaction and asset data
  • ✓ Well-maintained SDKs and detailed documentation
Limitations
  • ✗ Some features require enterprise subscription
  • ✗ Rate limits may restrict high-frequency apps on free tier
  • ✗ Occasional delays with new chain integrations
  • ✗ No real-time websocket streaming (REST only)

FAQs

API Specifications

v1
Pricing Model
Freemium (free tier, paid plans for higher usage/API limits)
Credit Card
Not Required
Response Formats
JSON
Supported Languages
7 Languages
SDK Support
JavaScript, Python, Go
Time to Hello World

Under 10 minutes

Rate Limit

35 requests/sec (standard), up to 300 requests/sec (enterprise)

Free Tier Usage

1,000 API calls/day, 3 requests/second (standard keys); no credit card required.

Use Case: Best For

Web3 startups, multi-chain DeFi/NFT apps, portfolio trackers, fintech integrations

Not Recommended For

On-chain gaming with real-time data needs, high-frequency trading bots

Resources

Documentation Official Website Source Code Pricing Details Postman Collection
#cryptocurrency#multi-blockchain#wallet-tracking#covalent

Explore Related APIs

Discover similar APIs to Covalent API

View All APIs
FREEMIUM

Etherscan API

The Etherscan API offers developers free access to comprehensive Ethereum blockchain data, suitable for applications such as crypto wallets and analytics tools.

BlockchainView Details
FREEMIUM

The Graph API

The Graph API allows developers to efficiently query blockchain data using GraphQL, organizing data from Ethereum and Polygon networks into subgraphs for real-time access.

BlockchainView Details
OPEN SOURCE

Web3.js Ethereum API

Web3.js is a free and open-source library for JavaScript and TypeScript, facilitating interaction with Ethereum and EVM-compatible networks, ideal for blockchain applications.

BlockchainView Details