Skip to main content

Covalent is a hosted blockchain data solution providing access to historical and current onchain data for 200+ supported blockchains, including Arbitrum One, Nova and Orbit chains.

Covalent maintains a full replica of every supported blockchain, meaning you have access to:

  • Current and historical account balances
  • Full transaction histories
  • Every contract log event
  • All NFTs including assets and metadata

Use Covalent if you need:

  • Wallet, Transactions, NFT, DEX, Staking or core blockchain data (log events, blocks)
  • Normalized, aggregated and enhanced multichain data, well beyond what you get from RPC providers
  • Enterprise-grade performance

Sign up to start building on Arbitrum

APIs

The Covalent APIs enables developers to quickly and easily access structured onchain data. This means consistent response schemas regardless of the blockchain. Available APIs and corresponding use cases include:

Wallet API​

  • Features: All token balances (ERC20, 721, 1155, native), token transfers and prices (spot & historical) for a wallet.
  • Use cases: Wallets, portfolio trackers, token gating, airdrop snapshots.

NFT API​

  • Features: Media assets, metadata, sales, owners, trait & attribute filters, thumbnails & previews.
  • Use cases: NFT galleries & marketplaces, real world asset (RWA) tracking, token gating.

DEX API​

  • Features: Positions, rewards, pool and token details for major DEX protocols.
  • Use cases: Analytics dashboards, leaderboards, reward calculators.

Cross-Chain Activity API​

  • Features: Single API call to fetch a list of active chains and the latest transaction date on each for an address.
  • Use cases: App onboarding.

Transactions API​

Security API​

  • Features: NFT and ERC20 token allowances, including value-at-risk.
  • Use cases: Revoke features in wallets, security applications.

Blockchain API​

  • Features: Block details, log events by contract address or topic hash, gas prices.
  • Use cases: Custom block explorers.

Developer Tools​

There are 3 primary developer tools for using the APIs:

  1. Unified API - enterprise-grade endpoints to use with any programming language. Switch blockchains with one path parameter.

    curl -X GET https://api.covalenthq.com/v1/arbitrum-mainnet/address/0xf977814e90da44bfa03b6295a0616a897441acec/balances_v2/ \
        -H 'Content-Type: application/json' \
        -u YOUR_API_KEY:

  2. Client SDKs - official client libraries including TypeScript, Go and Python.

    TypeScript example:

    npm install @covalenthq/client-sdk

    or:

    yarn add @covalenthq/client-sdk
    import { CovalentClient } from "@covalenthq/client-sdk";

    (async () => {
    try {
        const client = new CovalentClient("YOUR_API_KEY");
        const transactions = client.TransactionService.getAllTransactionsForAddress("arbitrum-mainnet", "0xf977814e90da44bfa03b6295a0616a897441acec");

        for await (const tx of transactions) {
        console.log("tx", tx);
        }
    } catch (error) {
        console.log(error.message);
    }
    })();

  3. GoldRush Kit - beautifully designed React components for your dApp frontend GoldRush Component Example

Get started​

  • API Key - sign up for free
  • Docs - comprehensive knowledge base for all things Covalent
  • Guides - learn how to build for various use cases and expand your onchain knowledge