diff --git a/README.md b/README.md
index 38544e84..1a4b3d00 100755
--- a/README.md
+++ b/README.md
@@ -335,3 +335,10 @@ and they all have their own open source licenses.
 
 Please use the `bin/spc dump-license` command to export the open source licenses used in the project after compilation,
 and comply with the corresponding project's LICENSE.
+
+## Troubleshooting
+
+When downloading extensions, you may eventually see errors like `curl: (56) The requested URL returned error: 403` which are often caused by github rate limiting.
+You can verify this by adding `--debug` to the command and will see something like `[DEBU] Running command (no output) : curl -sfSL   "https://api.github.com/repos/openssl/openssl/releases"`.
+
+To fix this, [create](https://github.com/settings/tokens) a personal access token on GitHub and set it as an environment variable `GITHUB_TOKEN=<XXX>`.
\ No newline at end of file
diff --git a/config/ext.json b/config/ext.json
index 08ed6777..c6054abf 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -432,6 +432,21 @@
         "type": "builtin",
         "arg-type-unix": "custom"
     },
+    "opentelemetry": {
+        "notes": true,
+        "support": {
+            "Windows": "wip"
+        },
+        "arg-type": "enable",
+        "source": "opentelemetry",
+        "unix-only": true,
+        "ext-suggests": [
+            "grpc",
+            "protobuf",
+            "ffi"
+        ],
+        "type": "external"
+    },
     "openssl": {
         "notes": true,
         "type": "builtin",
diff --git a/config/source.json b/config/source.json
index a3ecd8df..ac1570f0 100644
--- a/config/source.json
+++ b/config/source.json
@@ -667,6 +667,16 @@
             "path": "COPYING"
         }
     },
+    "opentelemetry": {
+        "type": "url",
+        "url": "https://pecl.php.net/get/opentelemetry",
+        "path": "php-src/ext/opentelemetry",
+        "filename": "opentelemetry.tgz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "openssl": {
         "type": "ghrel",
         "repo": "openssl/openssl",
diff --git a/src/SPC/builder/extension/opentelemetry.php b/src/SPC/builder/extension/opentelemetry.php
new file mode 100644
index 00000000..d86037af
--- /dev/null
+++ b/src/SPC/builder/extension/opentelemetry.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\extension;
+
+use SPC\builder\Extension;
+use SPC\builder\windows\WindowsBuilder;
+use SPC\util\CustomExt;
+use SPC\util\GlobalEnvManager;
+
+#[CustomExt('opentelemetry')]
+class opentelemetry extends Extension
+{
+    public function validate(): void
+    {
+        if ($this->builder->getPHPVersionID() < 80000 && getenv('SPC_SKIP_PHP_VERSION_CHECK') !== 'yes') {
+            throw new \RuntimeException('The opentelemetry extension requires PHP 8.0 or later');
+        }
+    }
+
+    public function patchBeforeBuildconf(): bool
+    {
+        // soft link to the grpc source code
+        if ($this->builder instanceof WindowsBuilder) {
+            // not support windows yet
+            throw new \RuntimeException('opentelemetry extension does not support windows yet');
+        }
+        return false;
+    }
+
+    public function patchBeforeMake(): bool
+    {
+        // add -Wno-strict-prototypes
+        GlobalEnvManager::putenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS=' . getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS') . ' -Wno-strict-prototypes');
+        return true;
+    }
+
+    public function getUnixConfigureArg(): string
+    {
+        return '--enable-opentelemetry=' . BUILD_ROOT_PATH . '/opentelemetry GRPC_LIB_SUBDIR=' . BUILD_LIB_PATH;
+    }
+}
diff --git a/src/globals/ext-tests/opentelemetry.php b/src/globals/ext-tests/opentelemetry.php
new file mode 100644
index 00000000..746068b3
--- /dev/null
+++ b/src/globals/ext-tests/opentelemetry.php
@@ -0,0 +1,5 @@
+<?php
+
+declare(strict_types=1);
+
+assert(function_exists('OpenTelemetry\Instrumentation\hook'));