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Polkadot Update: New /v1 REST API Endpoints Available

June 4th, 2026

Polkadot REST API /v1 is available on Tatum for teams using Polkadot, Kusama, Westend, and Asset Hub REST endpoints through Tatum Gateway. The new /v1 paths are based on Parity’s Rust-based Polkadot REST API, which replaces the deprecated Node.js substrate-api-sidecar. The legacy /substrateapi paths remain available in parallel for the time being, but we recommend migrating existing integrations to /v1 as soon as possible.

View migration guide

Polkadot REST API endpoints

Polkadot REST API

🚀 Get Started
↳ Polkadot Mainnet
https://polkadot-mainnet.gateway.tatum.io/v1
🔍 Status 🕵️ Explorer
↳ Polkadot Asset Hub
https://polkadot-assethub.gateway.tatum.io/v1
🔍 Status 🕵️ Explorer
↳ Polkadot Westend
https://polkadot-westend.gateway.tatum.io/v1
🔍 Status 🕵️ Explorer
↳ Kusama Mainnet
https://kusama-mainnet.gateway.tatum.io/v1
🔍 Status 🕵️ Explorer
↳ Kusama Asset Hub
https://kusama-assethub.gateway.tatum.io/v1
🔍 Status 🕵️ Explorer

What you get

  • New /v1 REST paths: Use the new Polkadot REST API paths directly through Tatum Gateway.
  • Coverage across Polkadot-based networks: Available for Polkadot, Kusama, Westend, and Asset Hub networks.
  • Parallel migration window: Legacy /substrateapi paths remain available for the time being while you migrate.
  • Upstream-aligned infrastructure: The new paths follow Parity’s polkadot-rest-api, which replaces the deprecated substrate-api-sidecar.
  • Clear migration path: Existing REST calls generally move from /substrateapi/... to /v1/....