feat(providers): add BoldRouter provider

litellm/constants.py

@@ -950,6 +950,7 @@ openai_compatible_endpoints: Final[list] = [
     "https://api.cognition.ai/v1",
     "https://api.scx.ai/v1",
     "https://api.prisminference.com/v1",
+    "https://boldrouter.com/v1",
     "https://gigachat.devices.sberbank.ru/api/v1",
 ]
 
@@ -1025,6 +1026,7 @@ openai_compatible_providers: Final[list] = [
     "scx-ai",
     "prism",
     "sail",
+    "boldrouter",  # BoldRouter - JSON-configured provider
 ]
 
 OPENAI_AUDIO_TRANSCRIPTION_PROVIDERS: Final = frozenset({"openai"} | frozenset(openai_compatible_providers))

litellm/llms/openai_like/providers.json

@@ -212,5 +212,11 @@
     "api_key_env": "SAIL_API_KEY",
     "api_base_env": "SAIL_API_BASE",
     "supported_endpoints": ["/v1/chat/completions", "/v1/responses", "/v1/messages"]
+  },
+  "boldrouter": {
+    "base_url": "https://boldrouter.com/v1",
+    "api_key_env": "BOLDROUTER_API_KEY",
+    "api_base_env": "BOLDROUTER_API_BASE",
+    "supported_endpoints": ["/v1/chat/completions"]
   }
 }

litellm/provider_endpoints_support_backup.json

@@ -1960,6 +1960,23 @@
         "a2a": false
       }
     },
+    "boldrouter": {
+      "display_name": "BoldRouter (`boldrouter`)",
+      "url": "https://boldrouter.com/docs",
+      "endpoints": {
+        "chat_completions": true,
+        "messages": false,
+        "responses": false,
+        "embeddings": false,
+        "image_generations": false,
+        "audio_transcriptions": false,
+        "audio_speech": false,
+        "moderations": false,
+        "batches": false,
+        "rerank": false,
+        "a2a": false
+      }
+    },
     "recraft": {
       "display_name": "Recraft (`recraft`)",
       "url": "https://docs.litellm.ai/docs/providers/recraft",

litellm/proxy/public_endpoints/provider_create_fields.json

@@ -2883,6 +2883,34 @@
     ],
     "default_model_placeholder": "prism/deepseek-v4.1-flash"
   },
+  {
+    "provider": "BOLDROUTER",
+    "provider_display_name": "BoldRouter",
+    "litellm_provider": "boldrouter",
+    "credential_fields": [
+      {
+        "key": "api_base",
+        "label": "API Base",
+        "placeholder": "https://boldrouter.com/v1",
+        "tooltip": null,
+        "required": false,
+        "field_type": "text",
+        "options": null,
+        "default_value": null
+      },
+      {
+        "key": "api_key",
+        "label": "API Key",
+        "placeholder": "sk-bold-...",
+        "tooltip": null,
+        "required": true,
+        "field_type": "password",
+        "options": null,
+        "default_value": null
+      }
+    ],
+    "default_model_placeholder": "boldrouter/bold/auto"
+  },
   {
     "provider": "RECRAFT",
     "provider_display_name": "Recraft",

litellm/types/utils.py

@@ -4147,6 +4147,7 @@ class LlmProviders(str, Enum):
     DARKBLOOM = "darkbloom"
     META = "meta"
     SAIL = "sail"
+    BOLDROUTER = "boldrouter"
     LITELLM_AGENT = "litellm_agent"
     CURSOR = "cursor"
     BEDROCK_MANTLE = "bedrock_mantle"

provider_endpoints_support.json

@@ -2212,6 +2212,23 @@
         "a2a": false
       }
     },
+    "boldrouter": {
+      "display_name": "BoldRouter (`boldrouter`)",
+      "url": "https://boldrouter.com/docs",
+      "endpoints": {
+        "chat_completions": true,
+        "messages": false,
+        "responses": false,
+        "embeddings": false,
+        "image_generations": false,
+        "audio_transcriptions": false,
+        "audio_speech": false,
+        "moderations": false,
+        "batches": false,
+        "rerank": false,
+        "a2a": false
+      }
+    },
     "recraft": {
       "display_name": "Recraft (`recraft`)",
       "url": "https://docs.litellm.ai/docs/providers/recraft",

tests/unit/llms/openai_like/test_boldrouter_provider.py

@@ -0,0 +1,150 @@
+import json
+from pathlib import Path
+from typing import Final
+
+import pytest
+import respx
+
+import litellm
+from litellm.caching.llm_caching_handler import LLMClientCache
+
+BOLDROUTER_CHAT_URL: Final = "https://boldrouter.com/v1/chat/completions"
+
+
+def _chat_completion(content: str) -> dict:
+    return {
+        "id": "chatcmpl-boldrouter",
+        "object": "chat.completion",
+        "created": 1_790_000_000,
+        "model": "bold/auto",
+        "choices": [{"index": 0, "message": {"role": "assistant", "content": content}, "finish_reason": "stop"}],
+        "usage": {
+            "prompt_tokens": 5,
+            "completion_tokens": 44,
+            "total_tokens": 49,
+            "completion_tokens_details": {"reasoning_tokens": 40},
+        },
+    }
+
+
+def test_boldrouter_provider_resolution(monkeypatch: pytest.MonkeyPatch):
+    from litellm.litellm_core_utils.get_llm_provider_logic import get_llm_provider
+
+    monkeypatch.setenv("BOLDROUTER_API_KEY", "sk-bold-test")
+    monkeypatch.delenv("BOLDROUTER_API_BASE", raising=False)
+
+    model, provider, api_key, api_base = get_llm_provider(
+        model="boldrouter/anthropic/claude-sonnet-4.6",
+        custom_llm_provider=None,
+        api_base=None,
+        api_key=None,
+    )
+
+    # BoldRouter model IDs are themselves provider-prefixed; only the litellm prefix is stripped.
+    assert model == "anthropic/claude-sonnet-4.6"
+    assert provider == "boldrouter"
+    assert api_key == "sk-bold-test"
+    assert api_base == "https://boldrouter.com/v1"
+
+
+def test_boldrouter_provider_reads_api_base_from_env(monkeypatch: pytest.MonkeyPatch):
+    from litellm.litellm_core_utils.get_llm_provider_logic import get_llm_provider
+
+    monkeypatch.setenv("BOLDROUTER_API_KEY", "sk-bold-test")
+    monkeypatch.setenv("BOLDROUTER_API_BASE", "https://gateway.internal.example/v1")
+
+    _, provider, _, api_base = get_llm_provider(
+        model="boldrouter/bold/auto",
+        custom_llm_provider=None,
+        api_base=None,
+        api_key=None,
+    )
+
+    assert provider == "boldrouter"
+    assert api_base == "https://gateway.internal.example/v1"
+
+
+def test_boldrouter_provider_keeps_explicit_credentials(monkeypatch: pytest.MonkeyPatch):
+    from litellm.litellm_core_utils.get_llm_provider_logic import get_llm_provider
+
+    monkeypatch.setenv("BOLDROUTER_API_KEY", "sk-bold-env")
+
+    _, provider, api_key, api_base = get_llm_provider(
+        model="boldrouter/bold/auto",
+        custom_llm_provider=None,
+        api_base="https://proxy.internal.example/v1",
+        api_key="sk-bold-explicit",
+    )
+
+    assert provider == "boldrouter"
+    assert api_key == "sk-bold-explicit"
+    assert api_base == "https://proxy.internal.example/v1"
+
+
+def test_boldrouter_is_available_in_add_model_form():
+    fields_path = Path(litellm.__file__).parent / "proxy" / "public_endpoints" / "provider_create_fields.json"
+    providers = json.loads(fields_path.read_text())
+    boldrouter = next(provider for provider in providers if provider["litellm_provider"] == "boldrouter")
+
+    assert boldrouter["provider"] == "BOLDROUTER"
+    assert boldrouter["provider_display_name"] == "BoldRouter"
+    assert boldrouter["default_model_placeholder"] == "boldrouter/bold/auto"
+    assert {field["key"]: field["required"] for field in boldrouter["credential_fields"]} == {
+        "api_base": False,
+        "api_key": True,
+    }
+
+
+def test_boldrouter_supported_endpoints():
+    package_root = Path(litellm.__file__).parent
+    for matrix_path in (
+        package_root / "provider_endpoints_support_backup.json",
+        package_root.parent / "provider_endpoints_support.json",
+    ):
+        endpoints = json.loads(matrix_path.read_text())["providers"]["boldrouter"]["endpoints"]
+        assert endpoints["chat_completions"] is True
+        assert [name for name, supported in endpoints.items() if supported] == ["chat_completions"]
+
+
+def test_boldrouter_chat_request_passes_routing_options_through(monkeypatch: pytest.MonkeyPatch):
+    monkeypatch.setattr(litellm, "in_memory_llm_clients_cache", LLMClientCache())
+    with respx.mock() as upstream:
+        route: Final = upstream.post(BOLDROUTER_CHAT_URL).respond(200, json=_chat_completion("Hello from BoldRouter"))
+        response: Final = litellm.completion(
+            model="boldrouter/bold/auto",
+            messages=[{"role": "user", "content": "Say hello"}],
+            api_key="sk-bold-test",
+            extra_headers={"x-bold-routing": "price"},
+            extra_body={"models": ["bold/auto", "openai/gpt-5.5"], "reasoning": {"effort": "high"}},
+        )
+
+    request: Final = route.calls.last.request
+    body: Final = json.loads(request.content)
+    assert route.call_count == 1
+    assert str(request.url) == BOLDROUTER_CHAT_URL
+    assert request.headers["authorization"] == "Bearer sk-bold-test"
+    assert request.headers["x-bold-routing"] == "price"
+    assert body["model"] == "bold/auto"
+    assert body["messages"] == [{"role": "user", "content": "Say hello"}]
+    assert body["models"] == ["bold/auto", "openai/gpt-5.5"]
+    assert body["reasoning"] == {"effort": "high"}
+    assert response.choices[0].message.content == "Hello from BoldRouter"
+    assert response.usage.completion_tokens_details.reasoning_tokens == 40
+
+
+@pytest.mark.asyncio
+async def test_boldrouter_async_chat_request(monkeypatch: pytest.MonkeyPatch):
+    monkeypatch.setattr(litellm, "disable_aiohttp_transport", True)
+    monkeypatch.setattr(litellm, "in_memory_llm_clients_cache", LLMClientCache())
+    with respx.mock() as upstream:
+        route: Final = upstream.post(BOLDROUTER_CHAT_URL).respond(200, json=_chat_completion("Hi"))
+        response: Final = await litellm.acompletion(
+            model="boldrouter/deepseek/deepseek-v4-flash",
+            messages=[{"role": "user", "content": "Say hi"}],
+            api_key="sk-bold-test",
+        )
+
+    body: Final = json.loads(route.calls.last.request.content)
+    assert route.call_count == 1
+    assert body["model"] == "deepseek/deepseek-v4-flash"
+    assert response.choices[0].message.content == "Hi"