llm_memory_validation/patches/letta_openrouter_embedding_auth.patch

diff --git a/letta/llm_api/openai_client.py b/letta/llm_api/openai_client.py
--- a/letta/llm_api/openai_client.py
+++ b/letta/llm_api/openai_client.py
@@
     def _prepare_client_kwargs_embedding(self, embedding_config: EmbeddingConfig) -> dict:
         api_key = model_settings.openai_api_key or os.environ.get("OPENAI_API_KEY")
+        is_openrouter = embedding_config.embedding_endpoint and "openrouter.ai" in embedding_config.embedding_endpoint
+        if is_openrouter:
+            api_key = model_settings.openrouter_api_key or os.environ.get("OPENROUTER_API_KEY") or api_key
         # supposedly the openai python client requires a dummy API key
         api_key = api_key or "DUMMY_API_KEY"
         kwargs = {"api_key": api_key, "base_url": embedding_config.embedding_endpoint}
+        if is_openrouter:
+            headers = {}
+            if model_settings.openrouter_referer:
+                headers["HTTP-Referer"] = model_settings.openrouter_referer
+            if model_settings.openrouter_title:
+                headers["X-Title"] = model_settings.openrouter_title
+            if headers:
+                kwargs["default_headers"] = headers
         return kwargs