PromptLayer is a platform for prompt engineering.It also helps with the LLM observability to visualize requests, version prompts, and track usage.

WhilePromptLayer does have LLMs that integrate directly with LangChain (e.g.PromptLayerOpenAI),using a callback is the recommended way to integratePromptLayer with LangChain.

Installation and Setup​

To work withPromptLayer, we have to:

• Create aPromptLayer account
• Create an api token and set it as an environment variable (PROMPTLAYER_API_KEY)

Install a Python package:

pip install promptlayer

Callback​

See ausage example.

import promptlayer# Don't forget this import!
from langchain.callbacksimport PromptLayerCallbackHandler

LLM​

See ausage example.

from langchain_community.llmsimport PromptLayerOpenAI

Chat Models​

See ausage example.

from langchain_community.chat_modelsimport PromptLayerChatOpenAI