diff --git a/python/.env.example b/python/.env.example
index a1bed2549..74e161700 100644
--- a/python/.env.example
+++ b/python/.env.example
@@ -9,6 +9,7 @@ BEEAI_LOG_LEVEL=INFO
 ########################
 
 # OPENAI_API_KEY=your-openai-api-key
+# OPENAI_API_HEADERS="secret-header=1234"
 
 ########################
 ### watsonx specific configuration
@@ -47,17 +48,21 @@ BEEAI_LOG_LEVEL=INFO
 ########################
 
 # GOOGLE_VERTEX_CHAT_MODEL=gemini-2.0-flash-lite-001
-# GOOGLE_VERTEX_PROJECT=""
-# GOOGLE_VERTEX_LOCATION=""
+# GOOGLE_VERTEX_PROJECT=your-vertexai-project
+# GOOGLE_VERTEX_LOCATION=your-vertexai-location
+# GOOGLE_VERTEX_API_HEADERS="secret-header=1234"
+
 
 ########################
 ### Amazon Bedrock specific configuration
 ########################
 
-# AWS_ACCESS_KEY_ID=
-# AWS_SECRET_ACCESS_KEY=
-# AWS_REGION=
-# AWS_CHAT_MODEL=
+# AWS_ACCESS_KEY_ID=your-aws-access-key
+# AWS_SECRET_ACCESS_KEY=your-secret-access-key
+# AWS_REGION=your-aws-region
+# AWS_CHAT_MODEL=llama-3.1-8b-instant
+# AWS_API_HEADERS="secret-header=1234"
+
 
 ########################
 ### Anthropic specific configuration
@@ -65,12 +70,16 @@ BEEAI_LOG_LEVEL=INFO
 
 # ANTHROPIC_API_KEY=your-anthropic-api-key
 # ANTHROPIC_CHAT_MODEL=claude-3-haiku-20240307"
+# ANTHROPIC_API_HEADERS="secret-header=1234"
+
 
 ########################
 ### Azure OpenAI specific configuration
 ########################
 
-# AZURE_OPENAI_API_KEY=
-# AZURE_OPENAI_API_BASE=
-# AZURE_OPENAI_API_VERSION=
-# AZURE_OPENAI_CHAT_MODEL=
+# AZURE_OPENAI_API_KEY=your-azure-api-key
+# AZURE_OPENAI_API_BASE=your-base-url
+# AZURE_OPENAI_API_VERSION=2024-10-21
+# AZURE_OPENAI_CHAT_MODEL=gpt-4o-mini
+# AZURE_OPENAI_API_HEADERS="secret-header=1234"
+
diff --git a/python/beeai_framework/adapters/amazon_bedrock/backend/chat.py b/python/beeai_framework/adapters/amazon_bedrock/backend/chat.py
index f99d5ac90..88feb09c8 100644
--- a/python/beeai_framework/adapters/amazon_bedrock/backend/chat.py
+++ b/python/beeai_framework/adapters/amazon_bedrock/backend/chat.py
@@ -16,6 +16,7 @@
 import os
 from typing import Any
 
+from beeai_framework.adapters.litellm import utils
 from beeai_framework.adapters.litellm.chat import LiteLLMChatModel
 from beeai_framework.backend.constants import ProviderName
 from beeai_framework.logger import Logger
@@ -68,3 +69,6 @@ def __init__(self, model_id: str | None = None, settings: dict[str, Any] | None
                 "aws_region_name": aws_region_name,
             },
         )
+        self._settings["extra_headers"] = utils.parse_extra_headers(
+            self._settings.get("extra_headers"), os.getenv("AWS_API_HEADERS")
+        )
diff --git a/python/beeai_framework/adapters/anthropic/backend/chat.py b/python/beeai_framework/adapters/anthropic/backend/chat.py
index bf557d7ab..ec36d31ee 100644
--- a/python/beeai_framework/adapters/anthropic/backend/chat.py
+++ b/python/beeai_framework/adapters/anthropic/backend/chat.py
@@ -17,6 +17,7 @@
 
 from dotenv import load_dotenv
 
+from beeai_framework.adapters.litellm import utils
 from beeai_framework.adapters.litellm.chat import LiteLLMChatModel
 from beeai_framework.backend.constants import ProviderName
 from beeai_framework.logger import Logger
@@ -45,3 +46,6 @@ def __init__(self, model_id: str | None = None, settings: dict[str, Any] | None
             provider_id="anthropic",
             settings=_settings | {"api_key": api_key},
         )
+        self._settings["extra_headers"] = utils.parse_extra_headers(
+            self._settings.get("extra_headers"), os.getenv("ANTHROPIC_API_HEADERS")
+        )
diff --git a/python/beeai_framework/adapters/azure_openai/backend/chat.py b/python/beeai_framework/adapters/azure_openai/backend/chat.py
index 8babed8fb..ac63faac7 100644
--- a/python/beeai_framework/adapters/azure_openai/backend/chat.py
+++ b/python/beeai_framework/adapters/azure_openai/backend/chat.py
@@ -17,6 +17,7 @@
 
 from dotenv import load_dotenv
 
+from beeai_framework.adapters.litellm import utils
 from beeai_framework.adapters.litellm.chat import LiteLLMChatModel
 from beeai_framework.backend.constants import ProviderName
 from beeai_framework.logger import Logger
@@ -123,3 +124,6 @@ def __init__(self, model_id: str | None = None, settings: dict[str, Any] | None
             provider_id="azure",  # LiteLLM uses 'azure' for Azure OpenAI
             settings=config,
         )
+        self._settings["extra_headers"] = utils.parse_extra_headers(
+            self._settings.get("extra_headers"), os.getenv("AZURE_OPENAI_API_HEADERS")
+        )
diff --git a/python/beeai_framework/adapters/vertexai/backend/chat.py b/python/beeai_framework/adapters/vertexai/backend/chat.py
index f75deea1c..721685b49 100644
--- a/python/beeai_framework/adapters/vertexai/backend/chat.py
+++ b/python/beeai_framework/adapters/vertexai/backend/chat.py
@@ -16,6 +16,7 @@
 import os
 from typing import Any
 
+from beeai_framework.adapters.litellm import utils
 from beeai_framework.adapters.litellm.chat import LiteLLMChatModel
 from beeai_framework.backend.constants import ProviderName
 from beeai_framework.logger import Logger
@@ -44,7 +45,7 @@ def __init__(self, model_id: str | None = None, settings: dict[str, Any] | None
         # Set GOOGLE_APPLICATION_CREDENTIALS / GOOGLE_CREDENTIALS / GOOGLE_APPLICATION_CREDENTIALS_JSON
 
         super().__init__(
-            model_id if model_id else os.getenv("VERTEXAI_CHAT_MODEL", "geminid-2.0-flash-lite-001"),
+            model_id if model_id else os.getenv("GOOGLE_VERTEX_CHAT_MODEL", "gemini-2.0-flash-lite-001"),
             provider_id="vertex_ai",
             settings=_settings
             | {
@@ -52,3 +53,6 @@ def __init__(self, model_id: str | None = None, settings: dict[str, Any] | None
                 "vertex_location": vertexai_location,
             },
         )
+        self._settings["extra_headers"] = utils.parse_extra_headers(
+            self._settings.get("extra_headers"), os.getenv("GOOGLE_VERTEX_API_HEADERS")
+        )
diff --git a/python/docs/backend.md b/python/docs/backend.md
index 80bbc8b44..9bacb0585 100644
--- a/python/docs/backend.md
+++ b/python/docs/backend.md
@@ -47,10 +47,10 @@ The following table depicts supported providers. Each provider requires specific
 | `OpenAI`         |  ✅  |          | `openai`     | OPENAI_CHAT_MODEL<br/>OPENAI_API_BASE<br/>OPENAI_API_KEY<br/>OPENAI_ORGANIZATION<br>OPENAI_API_HEADERS                                                                                                       |
 | `Watsonx`        |  ✅  |          | `@ibm-cloud/watsonx-ai`  | WATSONX_CHAT_MODEL<br>WATSONX_API_KEY<br>WATSONX_PROJECT_ID<br>WATSONX_SPACE_ID<br>WATSONX_TOKEN<br>WATSONX_ZENAPIKEY<br>WATSONX_URL<br>WATSONX_REGION |
 | `Groq`           |  ✅  |         | | GROQ_CHAT_MODEL<br>GROQ_API_KEY |
-| `Amazon Bedrock` |  ✅  |         |  `boto3`| AWS_CHAT_MODEL<br>AWS_ACCESS_KEY_ID<br>AWS_SECRET_ACCESS_KEY<br>AWS_REGION |
-| `Google Vertex`  |  ✅  |         |  | VERTEXAI_CHAT_MODEL<br>GOOGLE_VERTEX_PROJECT<br>GOOGLE_APPLICATION_CREDENTIALS<br>GOOGLE_APPLICATION_CREDENTIALS_JSON<br>GOOGLE_CREDENTIALS |
-| `Azure OpenAI`   |  ✅  |         |  | AZURE_OPENAI_CHAT_MODEL<br>AZURE_OPENAI_API_KEY<br>AZURE_OPENAI_API_BASE<br>AZURE_OPENAI_API_VERSION<br>AZURE_AD_TOKEN<br>AZURE_API_TYPE |
-| `Anthropic`      |  ✅  |         |  | ANTHROPIC_CHAT_MODEL<br>ANTHROPIC_API_KEY |
+| `Amazon Bedrock` |  ✅  |         |  `boto3`| AWS_CHAT_MODEL<br>AWS_ACCESS_KEY_ID<br>AWS_SECRET_ACCESS_KEY<br>AWS_REGION<br>AWS_API_HEADERS |
+| `Google Vertex`  |  ✅  |         |  | GOOGLE_VERTEX_CHAT_MODEL<br>GOOGLE_VERTEX_PROJECT<br>GOOGLE_APPLICATION_CREDENTIALS<br>GOOGLE_APPLICATION_CREDENTIALS_JSON<br>GOOGLE_CREDENTIALS<br>GOOGLE_VERTEX_API_HEADERS |
+| `Azure OpenAI`   |  ✅  |         |  | AZURE_OPENAI_CHAT_MODEL<br>AZURE_OPENAI_API_KEY<br>AZURE_OPENAI_API_BASE<br>AZURE_OPENAI_API_VERSION<br>AZURE_AD_TOKEN<br>AZURE_API_TYPE<br>AZURE_API_HEADERS |
+| `Anthropic`      |  ✅  |         |  | ANTHROPIC_CHAT_MODEL<br>ANTHROPIC_API_KEY<br>ANTHROPIC_API_HEADERS |
 | `xAI`           |  ✅  |         | | XAI_CHAT_MODEL<br>XAI_API_KEY |
 
 > [!TIP]