Tatum supports the entire Polkadot Ecosystem (Polkadot, Polkadot Asset Hub, Kusama, and Kusama Asset Hub), enabling developers to build scalable, interoperable, and production-ready Web3 applications.

The Polkadot ecosystem is a scalable, interoperable blockchain network designed to connect multiple specialized blockchains called parachains under one unified protocol. Built with Substrate and secured by a shared relay chain, Polkadot enables seamless cross-chain communication, flexible governance, and high throughput for decentralized applications. Its ecosystem includes the main Polkadot network for production-grade deployments, Kusama as a fast-moving experimental network, and Asset Hubs for efficient issuance and management of fungible and non-fungible tokens across chains, empowering developers to build next-generation Web3 applications with security, speed, and interoperability at scale.

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Supported Polkadot (para)chains

We’re excited to announce that both Arbitrum and Optimism, two leading Ethereum Layer 2 networks, are now live on Tatum’s Data API! These integrations empower developers to seamlessly access on-chain data from Arbitrum and Optimism through Tatum’s unified, scalable infrastructure.

Whether you’re building analytics dashboards, DeFi protocols, NFT apps, or user portfolio trackers, Tatum simplifies your development by eliminating the need to manage nodes or indexers — just plug into our API and start shipping.

Why Arbitrum & Optimism?

• Arbitrum: High throughput, EVM compatibility, and rapidly growing DeFi ecosystem.
• Optimism: Minimal fees, fast finality, and a thriving on-chain community.

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Available Data API endpoints for Arbitrum & Optimism

• 🔍 Get Wallet Portfolio
• 📜 Get Transaction History
• 🖼️ Get NFT Balances
• 🪙 Get Multi-Token Balances
• 🧱 Get DeFi Events

With full support for ARB and OP, Tatum gives you the power to build fast, data-rich applications on Ethereum’s most adopted L2s — without worrying about the backend complexity.

We’re expanding our Bitcoin support with the addition of Bitcoin Signet – the latest Bitcoin test network designed for stability and control. Unlike traditional testnets, Signet uses a custom signature-based validation, allowing block production to be centrally coordinated. This ensures more reliable block times, reduced spam, and easier faucet funding, making it ideal for testing wallets, applications, and integrations without mainnet risk.

https://en.bitcoin.it/wiki/Signet

Available Bitcoin networks in Tatum RPC Gateway

We’re excited to share that Solana , the high-performance blockchain known for its lightning-fast transactions and ultra-low fees, is now supported in Tatum’s Data API.

With Solana’s integration, developers can unlock real-time, scalable access to Solana’s vibrant ecosystem—without the hassle of running or maintaining nodes. Whether you’re building DeFi dashboards, NFT marketplaces, or wallet apps, Tatum provides a simple and unified way to query on-chain data directly from Solana.

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Available Data API endpoints for Solana:

• 💰 Get Wallet Portfolio
• 🖼️ Get NFT Balances
• 🪙 Get Token Information

We’re excited to announce a powerful update to our Get Token Information endpoint in Tatum’s Data API — you can now fetch native token details for Ethereum (ETH), Celo (CELO), Polygon (MATIC), and Solana (SOL) directly via a single unified interface!

We’re thrilled to announce that Base, the Ethereum Layer 2 chain incubated by Coinbase, is now supported in Tatum’s Data API! Base offers fast, low-cost, and secure transactions, making it an ideal environment for scalable dApps and seamless on-chain experiences.

With this integration, developers can now query on-chain data from Base using Tatum’s unified Data API endpoints. From wallet portfolios and NFT balances to DeFi blocks and transaction histories, Tatum makes it easy to build data-driven blockchain applications on Base – without managing complex infrastructure.

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Available Data API endpoints for Base

• 🔍 Get Wallet Portfolio
• 📜 Get Transaction History
• 🖼️ Get NFT Balances
• 🪙 Get Multi-Token Balances
• 🧱 Get DeFi Blocks

We’ve made significant improvements to our Data API infrastructure
– and we’re excited to roll out new, faster endpoints that deliver better performance and richer data.

• Up to 2.5× faster API responses across key endpoints
• Smarter asset detection: now capturing more token types and balances
• Increased backend scalability for improved stability and uptime

📚 Migration Guide & Important changes in API

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Deprecated Legacy Data API endpoints will be removed on June 30, 2025

To ensure continued access and performance, all users must migrate to the new endpoints by this date.
The legacy endpoints will no longer be maintained or guaranteed to function. To take full advantage of these improvements, we encourage you to start using the new endpoints listed below.

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Some endpoints now include usage-based pricing to maintain high performance and prevent abuse.
Pricing info is shown at the top of each endpoint page.

Action required

• Review your current integration
• Migrate to the listed endpoints
• Update your codebase accordingly to handle the updated responses

We’re thrilled to introduce SUI to the Tatum Blockchain Gateway!

SUI is a high-performance, permissionless Layer 1 blockchain developed by Mysten Labs, engineered to support ultra-fast, secure, and scalable decentralized applications.

Built with the Move programming language, SUI features a unique object-centric data model and supports parallel transaction execution, enabling low latency and high throughput — ideal for next-generation Web3 use cases like games, finance, and asset-rich dApps.

Developers can access all SUI networks - mainnet, testnet and devnet via Tatum’s RPC Gateway:

We’ve expanded our TRON support as part of the Tatum Blockchain Gateway upgrade. You can now connect to TRON using: HTTP API, Solidity HTTP API, JSON-RPC or Tatum API. All interfaces now benefit from improved infrastructure and lower latency via our global RPC gateway.

We’ve expanded our Blockchain RPC Gateway to Asia with a new balancer in 🌏 Singapore
– delivering significantly lower latency for users in the region, especially for “follow the tip” scenarios.

🚀 5× performance boost: Chains like Tron, Kaia (Klaytn), Ethereum, BSC, Polygon, Base and others now benefit from response times reduced from ~250ms → ~50ms.

Try it now by switching to https://{network}.gateway.tatum.ioand enjoy 99% uptime.

🌐 Try Blockchain Gateway