diff --git a/haystack_experimental/components/tools/openapi/_schema_conversion.py b/haystack_experimental/components/tools/openapi/_schema_conversion.py
index 30595656..1d0766a5 100644
--- a/haystack_experimental/components/tools/openapi/_schema_conversion.py
+++ b/haystack_experimental/components/tools/openapi/_schema_conversion.py
@@ -27,6 +27,7 @@ def openai_converter(schema: OpenAPISpecification) -> List[Dict[str, Any]]:
     :param schema: The OpenAPI specification to convert.
     :returns: A list of dictionaries, each dictionary representing an OpenAI function definition.
     """
+    jsonref_import.check()
     resolved_schema = jsonref.replace_refs(schema.spec_dict)
     fn_definitions = _openapi_to_functions(
         resolved_schema, "parameters", _parse_endpoint_spec_openai
@@ -43,6 +44,7 @@ def anthropic_converter(schema: OpenAPISpecification) -> List[Dict[str, Any]]:
     :param schema: The OpenAPI specification to convert.
     :returns: A list of dictionaries, each dictionary representing Anthropic function definition.
     """
+    jsonref_import.check()
     resolved_schema = jsonref.replace_refs(schema.spec_dict)
     return _openapi_to_functions(
         resolved_schema, "input_schema", _parse_endpoint_spec_openai
@@ -58,6 +60,7 @@ def cohere_converter(schema: OpenAPISpecification) -> List[Dict[str, Any]]:
     :param schema: The OpenAPI specification to convert.
     :returns: A list of dictionaries, each representing a Cohere style function definition.
     """
+    jsonref_import.check()
     resolved_schema = jsonref.replace_refs(schema.spec_dict)
     return _openapi_to_functions(
         resolved_schema, "not important for cohere", _parse_endpoint_spec_cohere
diff --git a/haystack_experimental/components/tools/openapi/openapi_tool.py b/haystack_experimental/components/tools/openapi/openapi_tool.py
index 33c64d4a..bddaf65d 100644
--- a/haystack_experimental/components/tools/openapi/openapi_tool.py
+++ b/haystack_experimental/components/tools/openapi/openapi_tool.py
@@ -47,7 +47,7 @@ class OpenAPITool:
     tool = OpenAPITool(generator_api=LLMProvider.OPENAI,
                        generator_api_params={"model":"gpt-3.5-turbo"},
                        spec="https://raw.githubusercontent.com/mendableai/firecrawl/main/apps/api/openapi.json",
-                       credentials=Secret.from_token("<your-tool-token>"))
+                       credentials=Secret.from_env_var("FIRECRAWL_API_KEY"))
 
     results = tool.run(messages=[ChatMessage.from_user("Scrape URL: https://news.ycombinator.com/")])
     print(results)