Add SearchApi integration (#1369)

* Add SearchApi integration

* Add SearchApi Tool

* Update SearchApi_Tool JSON example and update description

src/backend/langflow/components/tools/SearchApi.py

@@ -0,0 +1,51 @@
+from langflow import CustomComponent
+from langchain.schema import Document
+from langflow.services.database.models.base import orjson_dumps
+from langchain_community.utilities.searchapi import SearchApiAPIWrapper
+from typing import Optional
+
+
+class SearchApi(CustomComponent):
+    display_name: str = "SearchApi"
+    description: str = "Real-time search engine results API."
+    output_types: list[str] = ["Document"]
+    documentation: str = "https://www.searchapi.io/docs/google"
+    field_config = {
+        "engine": {
+            "display_name": "Engine",
+            "field_type": "str",
+            "info": "The search engine to use.",
+        },
+        "params": {
+            "display_name": "Parameters",
+            "info": "The parameters to send with the request.",
+        },
+        "code": {"show": False},
+        "api_key": {
+            "display_name": "API Key",
+            "field_type": "str",
+            "required": True,
+            "password": True,
+            "info": "The API key to use SearchApi.",
+        },
+    }
+
+    def build(
+        self,
+        engine: str,
+        api_key: str,
+        params: Optional[dict] = None,
+    ) -> Document:
+        if params is None:
+            params = {}
+
+        search_api_wrapper = SearchApiAPIWrapper(engine=engine, searchapi_api_key=api_key)
+
+        q = params.pop("q", "SearchApi Langflow")
+        results = search_api_wrapper.results(q, **params)
+
+        result = orjson_dumps(results, indent_2=False)
+
+        document = Document(page_content=result)
+
+        return document