---
updatedAt: 2026-09-15T08:03:45.000Z
agentTools:
  projectIndex: https://docs.blockdaemon.com/llms.txt
---

# Polkadot

Access Polkadot with Blockdaemon RPC API

> 🚧 Substrate API Sidecar has been deprecated
>
> Sidecar has been replaced by the [Polkadot REST API](https://paritytech.github.io/polkadot-rest-api/). The new API is not a drop-in replacement, endpoints now include a `/v1/` prefix and some argument names have changed. See the [migration guide](https://paritytech.github.io/polkadot-rest-api/#guide-migration) to update your integration.

You can access Blockdaemon Polkadot infrastructure via:

* [Substrate RPC API](https://docs.blockdaemon.com/docs/access-polkadot-rpc-via-substrate-rpc-api)
* [Substrate Sidecar API](https://docs.blockdaemon.com/docs/access-polkadot-rpc-via-substrate-sidecar-api)
* [Polkadot REST API](https://docs.blockdaemon.com/docs/polkadot-via-polkadot-rest-api)