{"slug":"langsmith","name":"LangSmith","owner":null,"repo":null,"category":"observability-eval","lang":"","blurb":"LangChain's managed tracing, evaluation and prompt-engineering platform for LLM and agent apps.","use_cases":"[]","alternatives":[],"stars":0,"pushed_at":null,"synced_at":null,"kind":"api","one_liner":"LangChain's managed tracing, evaluation and prompt-engineering platform for LLM and agent apps.","website":"https://www.langchain.com/langsmith","docs_url":"https://docs.langchain.com/langsmith/observability","signup_url":"https://smith.langchain.com/","pricing_model":"freemium","pricing_note":"Free Developer: 5k traces/mo, 14-day retention, 1 seat; Plus $39/seat/mo (10k traces incl., $2.50/1k overage); Enterprise custom.","auth_type":"api-key","agent_signup":"self-serve-instant-key","agent_signup_note":"Free signup via Google/GitHub/email, no credit card; create an API key in Settings instantly. No public account-provisioning API for autonomous agents.","mcp_server":"https://github.com/langchain-ai/langsmith-mcp-server","sdks":["Python","TypeScript","REST"],"code_sample":"{\"lang\":\"python\",\"code\":\"import openai\\nfrom langsmith import wrappers, traceable\\n\\n# set LANGSMITH_TRACING=true and LANGSMITH_API_KEY=lsv2_...\\nclient = wrappers.wrap_openai(openai.OpenAI())\\n\\n@traceable\\ndef answer(question: str):\\n    return client.chat.completions.create(\\n        model=\\\"gpt-4o-mini\\\",\\n        messages=[{\\\"role\\\": \\\"user\\\", \\\"content\\\": question}],\\n    )\\n\\nanswer(\\\"What is LLM observability?\\\")\"}","tags":["tracing","evals","agents","prompt-management","langchain","mcp"],"useCases":[],"codeSample":{"lang":"python","code":"import openai\nfrom langsmith import wrappers, traceable\n\n# set LANGSMITH_TRACING=true and LANGSMITH_API_KEY=lsv2_...\nclient = wrappers.wrap_openai(openai.OpenAI())\n\n@traceable\ndef answer(question: str):\n    return client.chat.completions.create(\n        model=\"gpt-4o-mini\",\n        messages=[{\"role\": \"user\", \"content\": question}],\n    )\n\nanswer(\"What is LLM observability?\")"},"oneLiner":"LangChain's managed tracing, evaluation and prompt-engineering platform for LLM and agent apps.","docsUrl":"https://docs.langchain.com/langsmith/observability","signupUrl":"https://smith.langchain.com/","pricingModel":"freemium","pricingNote":"Free Developer: 5k traces/mo, 14-day retention, 1 seat; Plus $39/seat/mo (10k traces incl., $2.50/1k overage); Enterprise custom.","authType":"api-key","agentSignup":"self-serve-instant-key","agentSignupNote":"Free signup via Google/GitHub/email, no credit card; create an API key in Settings instantly. No public account-provisioning API for autonomous agents.","mcpServer":"https://github.com/langchain-ai/langsmith-mcp-server"}