diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c3d4e9343..63d58a728 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,11 +10,9 @@ Before developing locally, you'll need install the project's dependencies and cr
 
 The `.env` file specifies third-party APIs for use in e2e testing and the cosmos viewer:
 - `JSON_RPC_PROVIDER` must be specified for e2e tests to work.
-- `INFURA_KEY` must be specified to use a network provider in the cosmos viewer.
 
 ```
 JSON_RPC_PROVIDER='<JSON_RPC_PROVIDER>`
-INFURA_KEY='<INFURA_KEY>'
 ```
 
 ## Running widgets locally
diff --git a/src/cosmos/ControlledSwap.fixture.tsx b/src/cosmos/ControlledSwap.fixture.tsx
index 2a6660437..c1fdfe3b2 100644
--- a/src/cosmos/ControlledSwap.fixture.tsx
+++ b/src/cosmos/ControlledSwap.fixture.tsx
@@ -7,7 +7,7 @@ import { useCallback, useMemo, useState } from 'react'
 import { DAI, nativeOnChain, USDC } from '../constants/tokens'
 import EventFeed, { Event, HANDLERS } from './EventFeed'
 import useOption from './useOption'
-import useProvider, { INFURA_NETWORK_URLS } from './useProvider'
+import useProvider from './useProvider'
 
 function Fixture() {
   const [events, setEvents] = useState<Event[]>([])
@@ -64,7 +64,6 @@ function Fixture() {
           [Field.INPUT]: inputToken,
           [Field.OUTPUT]: outputToken,
         }}
-        jsonRpcUrlMap={INFURA_NETWORK_URLS}
         provider={connector}
         tokenList={tokens}
         {...eventHandlers}
diff --git a/src/cosmos/Swap.fixture.tsx b/src/cosmos/Swap.fixture.tsx
index fed2b1f85..37b5e0a40 100644
--- a/src/cosmos/Swap.fixture.tsx
+++ b/src/cosmos/Swap.fixture.tsx
@@ -17,7 +17,7 @@ import { useValue } from 'react-cosmos/fixture'
 import { DAI, USDC_MAINNET } from '../constants/tokens'
 import EventFeed, { Event, HANDLERS } from './EventFeed'
 import useOption from './useOption'
-import useProvider, { INFURA_NETWORK_URLS } from './useProvider'
+import useProvider from './useProvider'
 
 const TOKEN_WITH_NO_LOGO = {
   chainId: 1,
@@ -103,7 +103,6 @@ function Fixture() {
       defaultOutputAmount={defaultOutputAmount}
       hideConnectionUI={hideConnectionUI}
       locale={locale}
-      jsonRpcUrlMap={INFURA_NETWORK_URLS}
       defaultChainId={defaultChainId}
       provider={connector}
       theme={theme}
diff --git a/src/cosmos/useProvider.ts b/src/cosmos/useProvider.ts
index 2e7b09a01..b4c86ffa1 100644
--- a/src/cosmos/useProvider.ts
+++ b/src/cosmos/useProvider.ts
@@ -2,32 +2,11 @@ import { initializeConnector } from '@web3-react/core'
 import { MetaMask } from '@web3-react/metamask'
 import { Connector } from '@web3-react/types'
 import { WalletConnect } from '@web3-react/walletconnect'
-import { SupportedChainId } from 'constants/chains'
+import { JSON_RPC_FALLBACK_ENDPOINTS } from 'constants/jsonRpcEndpoints'
 import { useEffect, useState } from 'react'
 
 import useOption from './useOption'
 
-const INFURA_KEY = process.env.INFURA_KEY
-if (INFURA_KEY === undefined) {
-  console.error(`INFURA_KEY must be a defined environment variable to use jsonRpcUrlMap in the cosmos viewer`)
-}
-
-export const INFURA_NETWORK_URLS: { [chainId: number]: string[] } = INFURA_KEY
-  ? {
-      [SupportedChainId.MAINNET]: [`https://mainnet.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.RINKEBY]: [`https://rinkeby.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.ROPSTEN]: [`https://ropsten.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.GOERLI]: [`https://goerli.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.KOVAN]: [`https://kovan.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.OPTIMISM]: [`https://optimism-mainnet.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.OPTIMISTIC_KOVAN]: [`https://optimism-kovan.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.ARBITRUM_ONE]: [`https://arbitrum-mainnet.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.ARBITRUM_RINKEBY]: [`https://arbitrum-rinkeby.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.POLYGON]: [`https://polygon-mainnet.infura.io/v3/${INFURA_KEY}`],
-      [SupportedChainId.POLYGON_MUMBAI]: [`https://polygon-mumbai.infura.io/v3/${INFURA_KEY}`],
-    }
-  : {}
-
 enum Wallet {
   MetaMask = 'MetaMask',
   WalletConnect = 'WalletConnect',
@@ -38,7 +17,10 @@ const [walletConnect] = initializeConnector<WalletConnect>(
     new WalletConnect({
       actions,
       options: {
-        rpc: INFURA_NETWORK_URLS as { [chainId: number]: string[] },
+        rpc: Object.entries(JSON_RPC_FALLBACK_ENDPOINTS).reduce((rpcMap, [chainId, rpcUrls]) => ({
+          ...rpcMap,
+          [chainId]: rpcUrls.slice(0, 1),
+        })),
       },
     })
 )
diff --git a/webpack.cosmos.js b/webpack.cosmos.js
index 49b6dfccb..c62fefb5b 100644
--- a/webpack.cosmos.js
+++ b/webpack.cosmos.js
@@ -1,5 +1,4 @@
 /* eslint-disable @typescript-eslint/no-var-requires */
-const { DefinePlugin } = require('webpack')
 const EventEmitter = require('events')
 const HtmlWebpackPlugin = require('html-webpack-plugin')
 const rollup = require('rollup')
@@ -78,7 +77,6 @@ module.exports = (webpackConfig) => {
     },
     plugins: [
       new RollupPlugin({ config: rollupConfig, assetConfigs, watch: mode !== 'production' }),
-      new DefinePlugin({ 'process.env.INFURA_KEY': JSON.stringify(process.env.INFURA_KEY) }),
       new HtmlWebpackPlugin(),
     ],
     stats: 'errors-warnings',