Easiest Way to Build and Scale Your App on Arbitrum

Access the entire back-end stack you need to build on Arbitrum. RPC nodes, SDK, and the rest of the developer tools all in one platform.

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Status

Test a Simple Call on Arbitrum One

Try out our code - get yourAPI key for FREEand test how Tatum can simplify development.

Open this chain’s Postman collection:

Run and modify ready‑made RPC requests for this chain using the official Postman collection.

RPC Gateway

Connect to Arbitrum One Gateway

Make your first RPC call on Arbitrum One's Blockchain Gateway.

Smart Contract Tools on Arbitrum One

Deploy, create, and interact with smart contracts on Arbitrum One.

Estimate Gas on Arbitrum One

Calculate the optimal gas fee for any transaction on Arbitrum One.

Testnet Faucets for Arbitrum One

Get free testnet tokens for development on Arbitrum One.

Data API

Get Wallet Portfolio

Fetch all token balances for a wallet on Arbitrum One.

Get Wallet Transactions

Retrieve all Arbitrum One transactions for a wallet, including internal transfers.

Get Token Exchange Rates

Check exchange rates for tokens and fiat on Arbitrum One.

Check Malicious Address

Verify if an address on Arbitrum One is flagged as malicious.

Notifications

Real-time Alerts for Arbitrum One

Receive instant webhooks for any event on Arbitrum One.

Notification Types on Arbitrum One

Discover incoming and outgoing transaction events for Arbitrum One addresses.

Frequently Asked Questions

How to connect to the Arbitrum One gateway?

Connect to Tatum's Arbitrum One RPC Gateway using the endpoint format: arb-one-mainnet.gateway.tatum.io or arb-one-testnet.gateway.tatum.io.

Tatum's RPC Gateway provides discovery endpoints to help you explore available functionality:

/llms.txt: Access AI context and documentation for the network
/_methods: Discover all supported interfaces and RPC methods for the network

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How are the RPC calls priced?

Credits are consumed based on the complexity and resource requirements of each RPC method:

2 credits are consumed for Standard RPC methods (most common operations)
5 credits are consumed for the eth_call method
50 credits are consumed for Debug and Trace methods

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How do you authenticate your API key?

When using the Tatum REST API or SDK, you need to authenticate yourself with an API key. Access Tatum services by authenticating with your API key using one of the following methods:

X-API-Key in header (Recommended): Pass your API key in the x-api-key header
Authorization Header (Bearer): Use authorization: bearer {YOUR_API_KEY}
Authorization Header (Basic): Use HTTP Basic Authentication

For detailed authentication instructions and best practices, see the Authentication & Security documentation.

Get your API key by signing up at the Tatum Dashboard. Each free account includes two API keys – one for Mainnet and one for Testnet.

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Building Something Big on Arbitrum One? Let's Talk.

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Access the Tatum Platform

Tatum gives you a powerful Dashboard to track and manage your app.

Preview of the Tatum Dashboard - usage section.