Documentation

📚 For detailed guides, examples, and API reference, check out our comprehensive documentation.

Quick Start

1. Install Hayhooks

# Install Hayhooks
pip install hayhooks

2. Start Hayhooks

hayhooks run

3. Create a simple agent

Create a minimal agent wrapper with streaming chat support and a simple HTTP POST API:

from typing import AsyncGenerator
from haystack.components.agents import Agent
from haystack.dataclasses import ChatMessage
from haystack.tools import Tool
from haystack.components.generators.chat import OpenAIChatGenerator
from hayhooks import BasePipelineWrapper, async_streaming_generator


# Define a Haystack Tool that provides weather information for a given location.
def weather_function(location):
    return f"The weather in {location} is sunny."

weather_tool = Tool(
    name="weather_tool",
    description="Provides weather information for a given location.",
    parameters={
        "type": "object",
        "properties": {"location": {"type": "string"}},
        "required": ["location"],
    },
    function=weather_function,
)

class PipelineWrapper(BasePipelineWrapper):
    def setup(self) -> None:
        self.agent = Agent(
            chat_generator=OpenAIChatGenerator(model="gpt-4o-mini"),
            system_prompt="You're a helpful agent",
            tools=[weather_tool],
        )

    # This will create a POST /my_agent/run endpoint
    # `question` will be the input argument and will be auto-validated by a Pydantic model
    async def run_api_async(self, question: str) -> str:
        result = await self.agent.run_async(messages=[ChatMessage.from_user(question)])
        return result["last_message"].text

    # This will create an OpenAI-compatible /chat/completions endpoint
    async def run_chat_completion_async(
        self, model: str, messages: list[dict], body: dict
    ) -> AsyncGenerator[str, None]:
        chat_messages = [
            ChatMessage.from_openai_dict_format(message) for message in messages
        ]

        return async_streaming_generator(
            pipeline=self.agent,
            pipeline_run_args={
                "messages": chat_messages,
            },
        )

Save as my_agent_dir/pipeline_wrapper.py.

4. Deploy it

hayhooks pipeline deploy-files -n my_agent ./my_agent_dir

5. Run it

Call the HTTP POST API (/my_agent/run):

curl -X POST http://localhost:1416/my_agent/run \
  -H 'Content-Type: application/json' \
  -d '{"question": "What can you do?"}'

Call the OpenAI-compatible chat completion API (streaming enabled):

curl -X POST http://localhost:1416/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "my_agent",
    "messages": [{"role": "user", "content": "What can you do?"}]
  }'

Or chat with it in the embedded Chainlit UI (hayhooks run --with-chainlit) or integrate it with Open WebUI!

Key Features

🚀 Easy Deployment

• Deploy Haystack pipelines and agents as REST APIs with minimal setup
• Support for both YAML-based and wrapper-based pipeline deployment
• Automatic OpenAI-compatible endpoint generation

🌐 Multiple Integration Options

• MCP Protocol: Expose pipelines as MCP tools for use in AI development environments
• Chainlit UI: Embedded chat frontend with streaming, pipeline selection, and custom UI widgets
• Open WebUI Integration: Use Hayhooks as a backend for Open WebUI with streaming support
• OpenAI Compatibility: Seamless integration with OpenAI-compatible tools and frameworks

🔧 Developer Friendly

• CLI for easy pipeline management
• Flexible configuration options
• Comprehensive logging and debugging support
• Custom route and middleware support

📁 File Upload Support

• Built-in support for handling file uploads in pipelines
• Perfect for RAG systems and document processing

Next Steps

• Quick Start Guide - Get started with Hayhooks
• Installation - Install Hayhooks and dependencies
• Configuration - Configure Hayhooks for your needs
• Examples - Explore example implementations

Community & Support

• GitHub: deepset-ai/hayhooks
• Issues: GitHub Issues
• Documentation: Full Documentation

Hayhooks is actively maintained by the deepset team.