fix(bourse): register provider and enable tool calling

Addresses the Greptile review on #43675.

- Add BOURSE to LlmProviders so code paths that build
  LlmProviders(custom_llm_provider) resolve instead of raising.
- Add "bourse" to openai_compatible_providers, like the other
  JSON-configured providers.
- Set provider_info.supports_function_calling so requests with tools
  are not dropped for models missing from the cost map.
- Use distinct names in test_bourse_dynamic_config instead of
  reassigning locals, and add tests for the registration and tools.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

litellm/constants.py

@@ -1165,6 +1165,7 @@ openai_compatible_providers: Final[list[str]] = [
     "sail",
     "reka",
     "streamlake",
+    "bourse",
 ]
 
 OPENAI_AUDIO_TRANSCRIPTION_PROVIDERS: Final = frozenset({"openai"} | frozenset(openai_compatible_providers))

litellm/llms/openai_like/providers.json

@@ -299,6 +299,9 @@
     "api_base_env": "BOURSE_API_BASE",
     "param_mappings": {
       "max_completion_tokens": "max_tokens"
+    },
+    "provider_info": {
+      "supports_function_calling": true
     }
   }
 }

litellm/types/utils.py

@@ -4638,6 +4638,7 @@ class LlmProviders(str, Enum):
     OPENINFER = "openinfer"
     INFERENCEAPIS = "inferenceapis"
     ZEROGPU = "zerogpu"
+    BOURSE = "bourse"
     DARKBLOOM = "darkbloom"
     META = "meta"
     SAIL = "sail"

tests/unit/llms/openai_like/test_json_providers.py

@@ -344,14 +344,14 @@ class TestBourse:
         config_class = create_config_class(provider)
         config = config_class()
 
-        api_base, api_key = config._get_openai_compatible_provider_info(None, None)
-        assert api_base == "https://api.bourse.run/v1"
+        default_base, _ = config._get_openai_compatible_provider_info(None, None)
+        assert default_base == "https://api.bourse.run/v1"
 
-        api_base, api_key = config._get_openai_compatible_provider_info(
+        custom_base, custom_key = config._get_openai_compatible_provider_info(
             "https://custom.bourse.run/v1", "test-key"
         )
-        assert api_base == "https://custom.bourse.run/v1"
-        assert api_key == "test-key"
+        assert custom_base == "https://custom.bourse.run/v1"
+        assert custom_key == "test-key"
 
     def test_bourse_complete_url_appends_endpoint(self):
         from litellm.llms.openai_like.dynamic_config import create_config_class
@@ -390,3 +390,20 @@ class TestBourse:
         assert result["max_tokens"] == 100
         assert "max_completion_tokens" not in result
         assert result["temperature"] == 0.7
+
+    def test_bourse_registered_as_openai_compatible(self):
+        import litellm
+        from litellm.types.utils import LlmProviders
+
+        assert LlmProviders("bourse") == LlmProviders.BOURSE
+        assert "bourse" in litellm.openai_compatible_providers
+
+    def test_bourse_accepts_tools(self):
+        from litellm.utils import get_optional_params
+
+        tools = [{"type": "function", "function": {"name": "lookup", "parameters": {}}}]
+        params = get_optional_params(
+            model="claude-opus-5", custom_llm_provider="bourse", tools=tools
+        )
+
+        assert params["tools"] == tools