This is a proof-of-concept (POC) of a customer support automation service built based on the Retrieval Augmented Generation (RAG) approach. It uses OpenAI Embeddings and Chat Completion API + Pinecone vector DB.

• Install Dependencies
• Configuration
• Run the App
• Call the Completion API

npm ci

1. In order to use this application, you need to populate Pinecone vector DB with documents which will be used as context for your bot when answering users' questions. Directory scripts contains some Python scripts which may be used for this purpose. Please see scripts/README.md for more information.

2. Copy the contents of .env.example file to .env file and update the variables:

• CUSTOMER_CONFIGS is an array of objects like { "x-customer-id": "test-customer", "x-api-key": "secret", "OPENAI_API_KEY": "secret", "OPENAI_ORG": "secret" }:
  • x-customer-id is a random UUID which you need to generate once and which will serve as the ID of your customer. This value must be sent as the header key x-customer-id in the requests to [POST] /api/v1/complete endpoint
  • x-api-key - some password to protect the endpoint for this customer (header x-api-key)
  • OPENAI_API_KEY and OPENAI_ORG - please find those at https://platform.openai.com/api-keys
• POSTGRESQL_CONNECTION_STRING - a string to connect to your Postgresql DB, e.g. postgres://postgres.bwghlfwqsbwaxnafsysc:[email protected]:6543/postgres (example from https://supabase.com/)
• PINECONE_ENVIRONMENT, PINECONE_API_KEY, PINECONE_INDEX_NAME - please find this values in your account on Pinecone
• SIMILARITY_SEARCH_LIMIT, TOP_K - these parameters are used during similarity search. Default values can be used (0.8 and 5, correspondingly)

Note that several customers can be added to CUSTOMER_CONFIGS, each with their own OpenAI credentials and assistant.

npm run start:local

curl --location 'localhost:3000/api/v1/complete' \
--header 'x-api-key: secret' \
--header 'x-customer-id: 74a2aeb0-6963-4eb2-b458-e62877fcc152' \
--header 'Content-Type: application/json' \
--data '{
    "userId": "44e2ef2c-89a3-4428-9373-2d18d2e2113f",
    "query": "Is it possible to return something I bought on clearance in the store?""
}'

Notes:

• x-customer-id and x-api-key must coincide with the values stored in .env
• userId must be a UUID. Each user gets their own thread with the bot, in which all the messages are processed (so consider the possible effect of the previous conversation turns on the current question). Pass a new userId to start conversation from scratch.

Please also see https://github.com/IuriiD/ai24support-openai-assistants-api for comparison how the same task can be solved using OpenAI Assistants API.