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+# 2026-03-03 Session Notes
+
+## OpenRouter API Integration Testing
+
+Quick demo session to validate OpenRouter API access via Signet secrets. Claude attempted to make an API call using the stored OPENROUTER_API_KEY via the secret_exec MCP tool. The first attempt with model ID `anthropic/claude-haiku` failed with a 400 error indicating the model ID format is no longer valid. Claude corrected to `anthropic/claude-3.5-haiku` for the second attempt, suggesting the OpenRouter API naming convention has changed. The secret_exec tool successfully injected the API key and redacted sensitive values in output.
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