Updating Subgraph Section (#713)

Co-authored-by: Dayitva Goel <dayitvagoel@gmail.com>
Co-authored-by: 0xPotatoofdoom <singledivorceddad@gmail.com>

Author: 3 people

docs/api/subgraph/overview.md

@@ -7,14 +7,19 @@ title: Overview
 ## The Uniswap Subgraph
 
 Uniswap uses multiple [subgraphs](https://thegraph.com/docs/about/introduction#what-the-graph-is) for indexing and organizing data from the Uniswap smart contracts.
-These subgraphs are hosted on The Graph hosted service and can be used to query Uniswap data.
+These subgraphs are hosted on The Graph and can be used to query Uniswap data.
 
 ### Versions and Production Endpoints
 
-Each version of Uniswap has its own dedicated subgraph, and governance contracts have a dedicated subgraph as well.
+Each version of Uniswap for each chain has its own dedicated subgraph. As hosted subgraphs have been depreciated, you will now need to call through their decentralized subgraphs.
 
 Each subgraph has a dedicated endpoint for querying data, as well as a page on [The Graph explorer](https://thegraph.com/explorer) that exposes the schema and available fields to query.
 
+## Creating an API Key
+
+API Keys can be created by users inside the [Studio](https://thegraph.com/studio/apikeys/). This key will be included into the endpoint to associate a consumers usage to their billing.  
+
+
 ##### v4 (Mainnet)
 
 - [Subgraph](https://thegraph.com/explorer/subgraphs/DiYPVdygkfjDWhbxGSqAQxwBKmfKnkWQojqeM2rkLb3G?view=About&chain=arbitrum-one)
@@ -32,3 +37,22 @@ Each subgraph has a dedicated endpoint for querying data, as well as a page on [
 - [Subgraph](https://thegraph.com/explorer/subgraphs/A3Np3RQbaBA6oKJgiwDJeo5T3zrYfGHPWFYayMwtNDum?view=Query&chain=arbitrum-one)
 - Graphql Endpoint: `https://gateway.thegraph.com/api/<YOUR_API_KEY_HERE>/subgraphs/id/A3Np3RQbaBA6oKJgiwDJeo5T3zrYfGHPWFYayMwtNDum`
 - Code: https://github.com/Uniswap/v2-subgraph
+
+##### v1 (Mainnet)
+
+- [Explorer Page](https://thegraph.com/explorer/subgraphs/ESnjgAG9NjfmHypk4Huu4PVvz55fUwpyrRqHF21thoLJ?view=Query&chain=arbitrum-one)
+- Graphql Endpoint: `https://gateway.thegraph.com/api/<YOUR_API_KEY_HERE>/subgraphs/id/ESnjgAG9NjfmHypk4Huu4PVvz55fUwpyrRqHF21thoLJ`
+- Code: https://github.com/graphprotocol/uniswap-subgraph
+
+## v3 Subgraphs for other chains
+
+| Chain | V3 |
+|--|--|
+| Arbitrum | [Subgraph](https://thegraph.com/explorer/subgraphs/FbCGRftH4a3yZugY7TnbYgPJVEv2LvMT6oF1fxPe9aJM?view=Query&chain=arbitrum-one) |
+| Base | [Subgraph](https://thegraph.com/explorer/subgraphs/43Hwfi3dJSoGpyas9VwNoDAv55yjgGrPpNSmbQZArzMG?view=Query&chain=arbitrum-one) |
+| Optimism | [Subgraph](https://thegraph.com/explorer/subgraphs/Cghf4LfVqPiFw6fp6Y5X5Ubc8UpmUhSfJL82zwiBFLaj?view=Query&chain=arbitrum-one) |
+| Polygon | [Subgraph](https://thegraph.com/explorer/subgraphs/3hCPRGf4z88VC5rsBKU5AA9FBBq5nF3jbKJG7VZCbhjm?view=Query&chain=arbitrum-one) |
+| BSC | [Subgraph](https://thegraph.com/explorer/subgraphs/F85MNzUGYqgSHSHRGgeVMNsdnW1KtZSVgFULumXRZTw2?view=Query&chain=arbitrum-one) |
+| Avalanche | [Subgraph](https://thegraph.com/explorer/subgraphs/GVH9h9KZ9CqheUEL93qMbq7QwgoBu32QXQDPR6bev4Eo?view=Query&chain=arbitrum-one) |
+| Celo | [Subgraph](https://thegraph.com/explorer/subgraphs/ESdrTJ3twMwWVoQ1hUE2u7PugEHX3QkenudD6aXCkDQ4?view=Query&chain=arbitrum-one) |
+| Blast | [Subgraph](https://thegraph.com/explorer/subgraphs/2LHovKznvo8YmKC9ZprPjsYAZDCc4K5q4AYz8s3cnQn1?view=Query&chain=arbitrum-one) |