Agentic RAG with PgVector

This example implements Agentic RAG using PgVector (PostgreSQL with vector extensions) to store and search embeddings with hybrid search.

Code

agentic_rag_pgvector.py

"""
1. Run: `./cookbook/scripts/run_pgvector.sh` to start a postgres container with pgvector
2. Run: `pip install openai sqlalchemy 'psycopg[binary]' pgvector pypdf agno` to install the dependencies
3. Run: `python agentic_rag_pgvector.py` to run the agent
"""

from agno.agent import Agent
from agno.knowledge.embedder.openai import OpenAIEmbedder
from agno.knowledge.knowledge import Knowledge
from agno.models.openai import OpenAIResponses
from agno.vectordb.pgvector import PgVector, SearchType

db_url = "postgresql+psycopg://ai:ai@localhost:5532/ai"
knowledge = Knowledge(
    # Use PgVector as the vector database and store embeddings in the `ai.recipes` table
    vector_db=PgVector(
        table_name="recipes",
        db_url=db_url,
        search_type=SearchType.hybrid,
        embedder=OpenAIEmbedder(id="text-embedding-3-small"),
    ),
)

knowledge.insert(
    url="https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf"
)

agent = Agent(
    model=OpenAIResponses(id="gpt-5.2"),
    knowledge=knowledge,
    # Add a tool to search the knowledge base which enables agentic RAG.
    # This is enabled by default when `knowledge` is provided to the Agent.
    search_knowledge=True,
    markdown=True,
)
agent.print_response(
    "How do I make chicken and galangal in coconut milk soup", stream=True
)
# agent.print_response(
#     "Hi, i want to make a 3 course meal. Can you recommend some recipes. "
#     "I'd like to start with a soup, then im thinking a thai curry for the main course and finish with a dessert",
#     stream=True,
# )

Usage

1. Set up your virtual environment

   Mac

   uv venv --python 3.12
   source .venv/bin/activate
   

   uv venv --python 3.12
   .venv\Scripts\activate
   
2. Install dependencies

   uv pip install -U agno openai sqlalchemy psycopg pgvector pypdf
   
3. Setup PgVector

   Start PostgreSQL with pgvector extension and update the connection string in the code as needed.

4. Export your OpenAI API key

   export OPENAI_API_KEY=your_openai_api_key_here
   
5. Run Agent

   python agentic_rag_pgvector.py