diff --git a/.changeset/cuddly-hotels-tell.md b/.changeset/cuddly-hotels-tell.md
new file mode 100644
index 0000000000000..f70fd44eea03c
--- /dev/null
+++ b/.changeset/cuddly-hotels-tell.md
@@ -0,0 +1,5 @@
+---
+'@eth-optimism/data-transport-layer': patch
+---
+
+Removes the unused L1DataTransportClient and its dependencies
diff --git a/packages/data-transport-layer/package.json b/packages/data-transport-layer/package.json
index 2a3c7b98305d1..389271f8b2677 100644
--- a/packages/data-transport-layer/package.json
+++ b/packages/data-transport-layer/package.json
@@ -47,24 +47,20 @@
     "axios": "^0.21.1",
     "bcfg": "^0.1.6",
     "bfj": "^7.0.2",
-    "browser-or-node": "^1.3.0",
     "cors": "^2.8.5",
     "dotenv": "^10.0.0",
     "ethers": "^5.5.4",
     "express": "^4.17.1",
     "express-prom-bundle": "^6.3.6",
     "level": "^6.0.1",
-    "levelup": "^4.4.0",
-    "node-fetch": "^2.6.1"
+    "levelup": "^4.4.0"
   },
   "devDependencies": {
-    "@types/browser-or-node": "^1.3.0",
     "@types/chai": "^4.2.18",
     "@types/chai-as-promised": "^7.1.4",
     "@types/cors": "^2.8.9",
     "@types/levelup": "^4.3.0",
     "@types/mocha": "^8.2.2",
-    "@types/node-fetch": "^2.5.10",
     "@typescript-eslint/eslint-plugin": "^4.26.0",
     "@typescript-eslint/parser": "^4.26.0",
     "babel-eslint": "^10.1.0",
diff --git a/packages/data-transport-layer/src/client/client.ts b/packages/data-transport-layer/src/client/client.ts
deleted file mode 100644
index 724c72c30295a..0000000000000
--- a/packages/data-transport-layer/src/client/client.ts
+++ /dev/null
@@ -1,74 +0,0 @@
-// Only load if not in browser.
-import { isNode } from 'browser-or-node'
-
-// eslint-disable-next-line no-var
-declare var window: any
-
-const fetch = isNode ? require('node-fetch') : window.fetch
-
-import {
-  EnqueueResponse,
-  StateRootBatchResponse,
-  StateRootResponse,
-  SyncingResponse,
-  TransactionBatchResponse,
-  TransactionResponse,
-} from '../types'
-
-export class L1DataTransportClient {
-  constructor(private url: string) {}
-
-  public async syncing(): Promise<SyncingResponse> {
-    return this._get(`/eth/syncing`)
-  }
-
-  public async getEnqueueByIndex(index: number): Promise<EnqueueResponse> {
-    return this._get(`/enqueue/index/${index}`)
-  }
-
-  public async getLatestEnqueue(): Promise<EnqueueResponse> {
-    return this._get(`/enqueue/latest`)
-  }
-
-  public async getTransactionByIndex(
-    index: number
-  ): Promise<TransactionResponse> {
-    return this._get(`/transaction/index/${index}`)
-  }
-
-  public async getLatestTransacton(): Promise<TransactionResponse> {
-    return this._get(`/transaction/latest`)
-  }
-
-  public async getTransactionBatchByIndex(
-    index: number
-  ): Promise<TransactionBatchResponse> {
-    return this._get(`/batch/transaction/index/${index}`)
-  }
-
-  public async getLatestTransactionBatch(): Promise<TransactionBatchResponse> {
-    return this._get(`/batch/transaction/latest`)
-  }
-
-  public async getStateRootByIndex(index: number): Promise<StateRootResponse> {
-    return this._get(`/stateroot/index/${index}`)
-  }
-
-  public async getLatestStateRoot(): Promise<StateRootResponse> {
-    return this._get(`/stateroot/latest`)
-  }
-
-  public async getStateRootBatchByIndex(
-    index: number
-  ): Promise<StateRootBatchResponse> {
-    return this._get(`/batch/stateroot/index/${index}`)
-  }
-
-  public async getLatestStateRootBatch(): Promise<StateRootBatchResponse> {
-    return this._get(`/batch/stateroot/latest`)
-  }
-
-  private async _get<TResponse>(endpoint: string): Promise<TResponse> {
-    return (await fetch(`${this.url}${endpoint}`)).json()
-  }
-}
diff --git a/packages/data-transport-layer/src/index.ts b/packages/data-transport-layer/src/index.ts
index 4dfc5895941fb..c9f6f047dc007 100644
--- a/packages/data-transport-layer/src/index.ts
+++ b/packages/data-transport-layer/src/index.ts
@@ -1,2 +1 @@
-export * from './client/client'
 export * from './types'
diff --git a/yarn.lock b/yarn.lock
index bbbb207a7d7f1..d181bb2d06c74 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3035,11 +3035,6 @@
     "@types/connect" "*"
     "@types/node" "*"
 
-"@types/browser-or-node@^1.3.0":
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/@types/browser-or-node/-/browser-or-node-1.3.0.tgz#896ec59bcb8109fc858d8e68d3c056c176a19622"
-  integrity sha512-MVetr65IR7RdJbUxVHsaPFaXAO8fi89zv1g8L/mHygh1Q7xnnK02XZLwfMh57FOpTO6gtnagoPMQ/UOFfctXRQ==
-
 "@types/chai-as-promised@^7.1.4":
   version "7.1.4"
   resolved "https://registry.yarnpkg.com/@types/chai-as-promised/-/chai-as-promised-7.1.4.tgz#caf64e76fb056b8c8ced4b761ed499272b737601"
@@ -3168,14 +3163,6 @@
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-8.2.3.tgz#bbeb55fbc73f28ea6de601fbfa4613f58d785323"
   integrity sha512-ekGvFhFgrc2zYQoX4JeZPmVzZxw6Dtllga7iGHzfbYIYkAMUx/sAFP2GdFpLff+vdHXu5fl7WX9AT+TtqYcsyw==
 
-"@types/node-fetch@^2.5.10":
-  version "2.5.12"
-  resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.5.12.tgz#8a6f779b1d4e60b7a57fb6fd48d84fb545b9cc66"
-  integrity sha512-MKgC4dlq4kKNa/mYrwpKfzQMB5X3ee5U6fSprkKpToBqBmX4nFZL9cW5jl6sWn+xpRJ7ypWh2yyqqr8UUCstSw==
-  dependencies:
-    "@types/node" "*"
-    form-data "^3.0.0"
-
 "@types/node-fetch@^2.5.5":
   version "2.5.10"
   resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.5.10.tgz#9b4d4a0425562f9fcea70b12cb3fcdd946ca8132"
@@ -4825,11 +4812,6 @@ brorand@^1.0.1, brorand@^1.1.0:
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
 
-browser-or-node@^1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/browser-or-node/-/browser-or-node-1.3.0.tgz#f2a4e8568f60263050a6714b2cc236bb976647a7"
-  integrity sha512-0F2z/VSnLbmEeBcUrSuDH5l0HxTXdQQzLjkmBR4cYfvg1zJrKSlmIZFqyFR8oX0NrwPhy3c3HQ6i3OxMbew4Tg==
-
 browser-stdout@1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"