browserbase · stainless-app · May 7, 2026 · May 6, 2026 · May 6, 2026 · May 6, 2026
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.19.3"
+  ".": "3.20.0"
 }
diff --git a/.stats.yml b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 8
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase/stagehand-dbbff1a35360850898f7d60588e257faeac145a73cfcae634cfeb1b70109b6af.yml
-openapi_spec_hash: 28c4b734a5309067c39bb4c4b709b9ab
-config_hash: a962ae71493deb11a1c903256fb25386
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase/stagehand-6f6bfb81d092f30a5e2005328c97d61b9ea36132bb19e9e79e55294b9534ce20.yml
+openapi_spec_hash: f3fc1e3688a38dc2c28f7178f7d534e5
+config_hash: 1fb12ae9b478488bc1e56bfbdc210b01
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 3.20.0 (2026-05-06)
+
+Full Changelog: [v3.19.3...v3.20.0](https://github.com/browserbase/stagehand-net/compare/v3.19.3...v3.20.0)
+
+### Features
+
+* [feat]: add `ignoreSelectors` to `extract()` ([a9b327f](https://github.com/browserbase/stagehand-net/commit/a9b327f17942b28a16800c3dd93b569bb1bac6dc))
+* [STG-1808] Deprecate Browserbase project ID ([1571286](https://github.com/browserbase/stagehand-net/commit/15712866df03d50e920ab9f71e24e30d7b17e455))
+* remove experimental requirement on agent variables ([#2079](https://github.com/browserbase/stagehand-net/issues/2079)) ([1c3a03c](https://github.com/browserbase/stagehand-net/commit/1c3a03c6961d3c4fab99e2852ce0ea4dc4778444))
+
 ## 3.19.3 (2026-05-05)
 
 Full Changelog: [v3.18.0...v3.19.3](https://github.com/browserbase/stagehand-net/compare/v3.18.0...v3.19.3)

diff --git a/README.md b/README.md
@@ -96,7 +96,7 @@ namespace Stagehand.Examples
         static async Task Main(string[] args)
         {
             Env.Load();
-            // Uses environment variables: STAGEHAND_API_URL, BROWSERBASE_API_KEY, BROWSERBASE_PROJECT_ID, MODEL_API_KEY
+            // Uses environment variables: BROWSERBASE_API_KEY and MODEL_API_KEY
             StagehandClient client = new();
 
             // Start a new remote Browserbase session (Playwright-backed)
@@ -325,10 +325,8 @@ namespace Stagehand.Examples
 
 Set your environment variables (from `examples/.env.example`):
 
-- `STAGEHAND_API_URL`
 - `MODEL_API_KEY`
 - `BROWSERBASE_API_KEY`
-- `BROWSERBASE_PROJECT_ID`
 
 ```bash
 cp examples/.env.example examples/.env
@@ -373,7 +371,7 @@ Configure the client using environment variables:
 ```csharp
 using Stagehand;
 
-// Configured using the BROWSERBASE_API_KEY, BROWSERBASE_PROJECT_ID, MODEL_API_KEY and STAGEHAND_API_URL environment variables
+// Configured using BROWSERBASE_API_KEY, MODEL_API_KEY, and STAGEHAND_API_URL, with STAGEHAND_BASE_URL as a fallback
 StagehandClient client = new();
 ```
 
@@ -385,7 +383,6 @@ using Stagehand;
 StagehandClient client = new()
 {
     BrowserbaseApiKey = "My Browserbase API Key",
-    BrowserbaseProjectID = "My Browserbase Project ID",
     ModelApiKey = "My Model API Key",
 };
 ```
@@ -397,9 +394,11 @@ See this table for the available options:
 | Property               | Environment variable     | Required | Default value                             |
 | ---------------------- | ------------------------ | -------- | ----------------------------------------- |
 | `BrowserbaseApiKey`    | `BROWSERBASE_API_KEY`    | true     | -                                         |
-| `BrowserbaseProjectID` | `BROWSERBASE_PROJECT_ID` | true     | -                                         |
+| `BrowserbaseProjectID` | -                        | false    | -                                         |
 | `ModelApiKey`          | `MODEL_API_KEY`          | true     | -                                         |
-| `BaseUrl`              | `STAGEHAND_API_URL`     | true     | `"https://api.stagehand.browserbase.com"` |
+| `BaseUrl`              | `STAGEHAND_API_URL`      | false    | `"https://api.stagehand.browserbase.com"` |
+
+`BrowserbaseProjectID` is deprecated, accepted for backwards compatibility, and ignored. `STAGEHAND_BASE_URL` remains supported as a deprecated fallback when `STAGEHAND_API_URL` is unset.
 
 ### Modifying configuration
 

diff --git a/examples/.env.example b/examples/.env.example
@@ -1,4 +1,2 @@
-STAGEHAND_API_URL=https://api.stagehand.browserbase.com
 MODEL_API_KEY=sk-proj-your-llm-api-key-here
 BROWSERBASE_API_KEY=bb_live_your_api_key_here
-BROWSERBASE_PROJECT_ID=your-bb-project-uuid-here
diff --git a/examples/Env.cs b/examples/Env.cs
@@ -6,13 +6,7 @@ namespace Stagehand.Examples
 {
     internal static class Env
     {
-        private static readonly string[] RequiredKeys =
-        [
-            "STAGEHAND_API_URL",
-            "MODEL_API_KEY",
-            "BROWSERBASE_API_KEY",
-            "BROWSERBASE_PROJECT_ID",
-        ];
+        private static readonly string[] RequiredKeys = ["MODEL_API_KEY", "BROWSERBASE_API_KEY"];
 
         public static void Load()
         {

diff --git a/examples/local_browser_playwright_example.cs b/examples/local_browser_playwright_example.cs
@@ -17,7 +17,7 @@ public static async Task RunAsync()
         {
             Env.Load();
             // Uses environment variables: MODEL_API_KEY
-            // In local mode, BROWSERBASE_API_KEY and BROWSERBASE_PROJECT_ID can be any value.
+            // In local mode, BROWSERBASE_API_KEY can be any value.
             StagehandClient client = new();
 
             // Start a new local session

diff --git a/examples/local_server_multiregion_browser_example.cs b/examples/local_server_multiregion_browser_example.cs
@@ -16,8 +16,8 @@ internal static class LocalServerMultiregionBrowserExample
         public static async Task RunAsync()
         {
             Env.Load();
-            // Uses environment variables: BROWSERBASE_API_KEY, BROWSERBASE_PROJECT_ID, MODEL_API_KEY
-            // STAGEHAND_API_URL should point to the local Stagehand server.
+            // Uses environment variables: BROWSERBASE_API_KEY and MODEL_API_KEY
+            // STAGEHAND_API_URL should point to the local Stagehand server; STAGEHAND_BASE_URL is a fallback.
             StagehandClient client = new();
 
             var startResponse = await client.Sessions.Start(

diff --git a/examples/remote_browser_playwright_example.cs b/examples/remote_browser_playwright_example.cs
@@ -16,7 +16,7 @@ internal static class RemoteBrowserPlaywrightExample
         public static async Task RunAsync()
         {
             Env.Load();
-            // Uses environment variables: BROWSERBASE_API_KEY, BROWSERBASE_PROJECT_ID, MODEL_API_KEY
+            // Uses environment variables: BROWSERBASE_API_KEY and MODEL_API_KEY
             StagehandClient client = new();
 
             // Start a new remote Browserbase session (Playwright-backed)