Add Subsquid to tooling

apps/base-docs/docs/tools/data-indexers.md

@@ -14,6 +14,7 @@ keywords:
     blockchain data,
     Covalent,
     Moralis,
+    Subsquid,
     SubQuery,
     The Graph,
     GraphQL,
@@ -120,6 +121,22 @@ To get started with Moralis, you can [sign up for an account](https://moralis.io
 
 Find out more in the [Shovel Docs](https://indexsupply.com/shovel/docs/)
 
+#### Supported Networks
+
+- Base Mainnet
+- Base Sepolia (Testnet)
+
+---
+
+## Subsquid
+
+[Subsquid](https://subsquid.io/) is a decentralized hyper-scalable data platform optimized for providing efficient, permissionless access to large volumes of data.
+It currently serves historical on-chain data, including event logs, transaction receipts, traces, and per-transaction state diffs.
+Subsquid offers a powerful toolkit for creating custom data extraction and processing pipelines, achieving an indexing speed of up to 150k blocks per second.
+
+To get started, visit the [documentation](https://docs.subsquid.io/) or see this [quickstart with examples](https://docs.subsquid.io/sdk/examples/) on how to easily create subgraphs via Subsquid.
+
+
 #### Supported Networks
 
 - Base Mainnet