diff --git a/eng/common/testproxy/install-test-proxy.ps1 b/eng/common/testproxy/install-test-proxy.ps1
new file mode 100644
index 0000000000..402e5ddc8c
--- /dev/null
+++ b/eng/common/testproxy/install-test-proxy.ps1
@@ -0,0 +1,33 @@
+<#
+.SYNOPSIS
+Installs a standalone version of the test-proxy for use in tests. This function is intended to be used in CI/CD pipelines, and leaves behind
+the pipeline variable PROXY_EXE which contains the path to the test-proxy executable.
+
+.PARAMETER Version
+The version of the proxy to install. Requires a full version to be provided. EG "1.0.0-dev.20240617.1"
+
+.PARAMETER Directory
+The directory within which the test-proxy exe will exist after this function invokes. Defaults to CWD.
+#>
+param(
+    [Parameter(Mandatory = $true)]
+    $Version,
+    [Parameter(Mandatory = $true)]
+    $InstallDirectory
+)
+
+. (Join-Path $PSScriptRoot test-proxy.ps1)
+
+Write-Host "Attempting to download and install version `"$Version`" into `"$InstallDirectory`""
+
+Install-Standalone-TestProxy -Version $Version -Directory $InstallDirectory
+
+$PROXY_EXE = ""
+
+if ($IsWindows) {
+    $PROXY_EXE = Join-Path $InstallDirectory "Azure.Sdk.Tools.TestProxy.exe"
+} else {
+    $PROXY_EXE = Join-Path $InstallDirectory "Azure.Sdk.Tools.TestProxy"
+}
+Write-Host "Downloaded test-proxy available at $PROXY_EXE."
+Write-Host "##vso[task.setvariable variable=PROXY_EXE]$PROXY_EXE"
diff --git a/eng/common/testproxy/test-proxy-standalone-tool.yml b/eng/common/testproxy/test-proxy-standalone-tool.yml
new file mode 100644
index 0000000000..a836427ad7
--- /dev/null
+++ b/eng/common/testproxy/test-proxy-standalone-tool.yml
@@ -0,0 +1,83 @@
+# This template sets variable PROXY_PID to be used for shutdown later.
+parameters:
+  rootFolder: '$(Build.SourcesDirectory)'
+  runProxy: true
+  targetVersion: ''
+  templateRoot: '$(Build.SourcesDirectory)'
+  condition: true
+
+steps:
+  - pwsh: |
+        ${{ parameters.templateRoot }}/eng/common/scripts/trust-proxy-certificate.ps1
+    displayName: 'Language Specific Certificate Trust'
+    condition: and(succeeded(), ${{ parameters.condition }})
+
+  - task: PowerShell@2
+    displayName: 'Override proxy version if necessary'
+    condition: and(succeeded(), ${{ parameters.condition }}, ne('${{ parameters.targetVersion }}', ''))
+    inputs:
+      targetType: filePath
+      filePath: '${{ parameters.templateRoot }}/eng/common/testproxy/scripts/override-proxy-version.ps1'
+      arguments: '-TargetVersion "${{ parameters.targetVersion }}"'
+      pwsh: true
+
+  - pwsh: |
+      $standardVersion = "${{ parameters.templateRoot }}/eng/common/testproxy/target_version.txt"
+      $overrideVersion = "${{ parameters.templateRoot }}/eng/target_proxy_version.txt"
+
+      $version = $(Get-Content $standardVersion -Raw).Trim()
+
+      if (Test-Path $overrideVersion) {
+        $version = $(Get-Content $overrideVersion -Raw).Trim()
+      }
+
+      Write-Host "Installing test-proxy version $version"
+      ${{ parameters.templateRoot }}/eng/common/testproxy/install-test-proxy.ps1 -Version $version -InstallDirectory $(Build.BinariesDirectory)/test-proxy
+    displayName: "Install test-proxy"
+    condition: and(succeeded(), ${{ parameters.condition }})
+
+  - pwsh: |
+      Write-Host "##vso[task.prependpath]$(Build.BinariesDirectory)/test-proxy"
+    displayName: "Prepend path with test-proxy tool install location"
+
+  - ${{ if eq(parameters.runProxy, 'true') }}:
+    - pwsh: |
+        Write-Host "##vso[task.setvariable variable=ASPNETCORE_Kestrel__Certificates__Default__Path]${{ parameters.templateRoot }}/eng/common/testproxy/dotnet-devcert.pfx"
+        Write-Host "##vso[task.setvariable variable=ASPNETCORE_Kestrel__Certificates__Default__Password]password"
+        Write-Host "##vso[task.setvariable variable=PROXY_MANUAL_START]true"
+      displayName: 'Configure Kestrel and PROXY_MANUAL_START Variables'
+      condition: and(succeeded(), ${{ parameters.condition }})
+
+    - pwsh: |
+        $Process = Start-Process $(PROXY_EXE) `
+          -ArgumentList "start -u --storage-location ${{ parameters.rootFolder }}" `
+          -NoNewWindow -PassThru -RedirectStandardOutput ${{ parameters.rootFolder }}/test-proxy.log
+
+        Write-Host "##vso[task.setvariable variable=PROXY_PID]$($Process.Id)"
+      displayName: 'Run the testproxy - windows'
+      condition: and(succeeded(), eq(variables['Agent.OS'],'Windows_NT'), ${{ parameters.condition }})
+
+    # nohup does NOT continue beyond the current session if you use it within powershell
+    - bash: |
+        nohup $(PROXY_EXE) &>${{ parameters.rootFolder }}/test-proxy.log &
+
+        echo $! > $(Build.SourcesDirectory)/test-proxy.pid
+        echo "##vso[task.setvariable variable=PROXY_PID]$(cat $(Build.SourcesDirectory)/test-proxy.pid)"
+      displayName: "Run the testproxy - linux/mac"
+      condition: and(succeeded(), ne(variables['Agent.OS'],'Windows_NT'), ${{ parameters.condition }})
+      workingDirectory: "${{ parameters.rootFolder }}"
+
+    - pwsh: |
+        for ($i = 0; $i -lt 10; $i++) {
+            try {
+                Invoke-WebRequest -Uri "http://localhost:5000/Admin/IsAlive" | Out-Null
+                exit 0
+            } catch {
+                Write-Warning "Failed to successfully connect to test proxy. Retrying..."
+                Start-Sleep 6
+            }
+        }
+        Write-Error "Could not connect to test proxy."
+        exit 1
+      displayName: Test Proxy IsAlive
+      condition: and(succeeded(), ${{ parameters.condition }})
diff --git a/eng/common/testproxy/test-proxy.ps1 b/eng/common/testproxy/test-proxy.ps1
new file mode 100644
index 0000000000..f1bf1eca8f
--- /dev/null
+++ b/eng/common/testproxy/test-proxy.ps1
@@ -0,0 +1,162 @@
+Set-StrictMode -Version 4
+$AVAILABLE_TEST_PROXY_BINARIES = @{
+    "Windows" = @{
+        "AMD64" = @{
+            "system" = "Windows"
+            "machine" = "AMD64"
+            "file_name" = "test-proxy-standalone-win-x64.zip"
+            "executable" = "Azure.Sdk.Tools.TestProxy.exe"
+        }
+    }
+    "Linux" = @{
+        "X86_64" = @{
+            "system" = "Linux"
+            "machine" = "X86_64"
+            "file_name" = "test-proxy-standalone-linux-x64.tar.gz"
+            "executable" = "Azure.Sdk.Tools.TestProxy"
+        }
+        "ARM64" = @{
+            "system" = "Linux"
+            "machine" = "ARM64"
+            "file_name" = "test-proxy-standalone-linux-arm64.tar.gz"
+            "executable" = "Azure.Sdk.Tools.TestProxy"
+        }
+    }
+    "Darwin" = @{
+        "X86_64" = @{
+            "system" = "Darwin"
+            "machine" = "X86_64"
+            "file_name" = "test-proxy-standalone-osx-x64.zip"
+            "executable" = "Azure.Sdk.Tools.TestProxy"
+        }
+        "ARM64" = @{
+            "system" = "Darwin"
+            "machine" = "ARM64"
+            "file_name" = "test-proxy-standalone-osx-arm64.zip"
+            "executable" = "Azure.Sdk.Tools.TestProxy"
+        }
+    }
+}
+
+function Get-SystemArchitecture {
+    $unameOutput = uname -m
+    switch ($unameOutput) {
+        "x86_64" { return "X86_64" }
+        "aarch64" { return "ARM64" }
+        "arm64" { return "ARM64" }
+        default { throw "Unable to determine system architecture. uname -m returned $unameOutput." }
+    }
+}
+
+function Get-Proxy-Meta () {
+    $ErrorActionPreferenceDefault = $ErrorActionPreference
+    $ErrorActionPreference = "Stop"
+
+    $os = "unknown"
+    $machine = Get-SystemArchitecture
+
+    if ($IsWindows) {
+        $os = "Windows"
+        # we only support x64 on windows, if that doesn't work the platform is unsupported
+        $machine = "AMD64"
+    } elseif ($IsLinux) {
+        $os = "Linux"
+    } elseif ($IsMacOS) {
+        $os = "Darwin"
+    }
+
+    $ErrorActionPreference = $ErrorActionPreferenceDefault
+
+    return $AVAILABLE_TEST_PROXY_BINARIES[$os][$machine]
+}
+
+function Get-Proxy-Url (
+    [Parameter(mandatory=$true)]$Version
+) {
+    $systemDetails = Get-Proxy-Meta
+
+    $file = $systemDetails.file_name
+    $url = "https://github.com/Azure/azure-sdk-tools/releases/download/Azure.Sdk.Tools.TestProxy_$Version/$file"
+
+    return $url
+}
+
+function Cleanup-Directory ($path) {
+    if (Test-Path -Path $path) {
+        Remove-Item -Path $path -Recurse -Force
+    }
+    New-Item -ItemType Directory -Path $path -Force
+}
+
+function Is-Work-Necessary (
+    [Parameter(mandatory=$true)]
+    $Version,
+    [Parameter(mandatory=$true)]
+    $Directory
+) {
+    $savedVersionTxt = Join-Path $Directory "downloaded_version.txt"
+    if (Test-Path $savedVersionTxt) {
+        $result = (Get-Content -Raw $savedVersionTxt).Trim()
+
+        if ($result -eq $Version) {
+            return $false
+        }
+    }
+
+    return $true
+}
+
+<#
+.SYNOPSIS
+Installs a standalone version of the test-proxy.
+.PARAMETER Version
+The version of the proxy to install. Requires a full version to be provided. EG "1.0.0-dev.20240617.1"
+.PARAMETER Directory
+The directory within which the test-proxy exe will exist after this function invokes. Defaults to "."
+#>
+function Install-Standalone-TestProxy (
+    [Parameter(mandatory=$true)]
+    $Version,
+    $Directory="."
+) {
+    $ErrorActionPreference = "Stop"
+    $systemDetails = Get-Proxy-Meta
+
+    if (!(Test-Path $Directory) -and $Directory -ne ".") {
+        New-Item -ItemType Directory -Path $Directory -Force
+    }
+
+    $downloadFolder = Resolve-Path $Directory
+    $downloadUrl = Get-Proxy-Url $Version
+    $downloadFile = $downloadUrl.Split('/')[-1]
+    $downloadLocation = Join-Path $downloadFolder $downloadFile
+    $savedVersionTxt = Join-Path $downloadFolder "downloaded_version.txt"
+
+    if (Is-Work-Necessary $version $downloadFolder) {
+        Write-Host "Commencing installation of `"$Version`" to `"$downloadFolder`" from $downloadUrl."
+        Invoke-WebRequest -Uri $downloadUrl -OutFile $downloadLocation
+
+        if ($downloadFile -like "*.zip") {
+            Expand-Archive -Path $downloadLocation -DestinationPath $downloadFolder -Force
+        } elseif ($downloadFile -like "*.tar.gz") {
+            tar -xzf $downloadLocation -C $downloadFolder
+        } else {
+            throw "Unsupported file format"
+        }
+
+        # Remove the downloaded file after extraction
+        Remove-Item -Path $downloadLocation -Force
+
+        # Record downloaded version
+        Set-Content -Path $savedVersionTxt -Value $Version
+
+        # Set executable permissions if on macOS (Darwin)
+        $executable_path = Join-Path $downloadFolder $systemDetails.executable
+        if ($IsMacOS) {
+            chmod 755 $executable_path
+        }
+    }
+    else {
+        Write-Host "Target version `"$Version`" already present in target directory `"$downloadFolder.`""
+    }
+}