How can I get the Langchainplus API Key

Following the video “Question and Answer”, we need to pass the LCP_API_KEY, but I could not find where I can get this API. Anyone have this information, please share with me. Thank you.

I believe LangSmith is still in closed beta, but you can find some documentation and link to request access from here:

LangSmith | :parrot::hammer_and_wrench: LangSmith (

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Thank you for your information.