DAgent Client Demo

Multi-framework examples showcasing dagent-tool integration

This repository demonstrates how to integrate the DAgent decentralized network with popular AI agent frameworks. Each example shows how your agents can discover and route requests to specialized AI agents on-demand.

Frameworks Covered

Framework	Directory	Description
Google ADK	examples/adk/	Native ADK agent with dagent-tool
LangChain	examples/langchain/	LangChain agent with custom tool
CrewAI	examples/crewai/	CrewAI agent with dagent integration

What This Demo Does

Each example agent uses dagent-tool as a tool, allowing it to:

• Dynamically discover the best-suited agent from the DAgent network based on natural language requirements
• Route complex queries to specialized agents (code reviewers, data analysts, creative writers, etc.)
• Maintain session context across multiple interactions with the same remote agent

Prerequisites

• Python 3.10+
• A DAgent API Key — for network authentication
• Framework-specific API keys (see each example)

Quick Start

1. Clone & Setup

git clone <your-repo-url>cd dagent_client
# Create virtual environment
python -m venv .venv
source .venv/bin/activate # On Windows: .venv\Scripts\activate

2. Install for Your Framework

# For Google ADK
pip install dagent-tool[adk]
# For LangChain
pip install dagent-tool[langchain]
# For CrewAI
pip install dagent-tool[crewai]
# Install all frameworks
pip install dagent-tool[all]

3. Configure Environment

Create a .env file in the project root:

# Required for all examplesDAGENT_API_KEY=your-dagent-api-key# For Google ADK exampleGOOGLE_API_KEY=your-google-ai-api-key# For LangChain exampleOPENAI_API_KEY=your-openai-api-key# For CrewAI exampleOPENAI_API_KEY=your-openai-api-key

Project Structure

dagent_client/
├── examples/
│ ├── adk/
│ │ ├── __init__.py
│ │ └── agent.py # Google ADK example
│ ├── langchain/
│ │ ├── __init__.py
│ │ └── agent.py # LangChain example
│ └── crewai/
│ ├── __init__.py
│ └── agent.py # CrewAI example
├── .env # API keys (create this)
└── README.md

---

Google ADK Example

Run

adk run examples/adk
# Or use the web interface
adk web

Code

fromgoogle.adk.agents.llm_agentimportAgentfromdagent_toolimportadk_toolroot_agent=Agent(
model='gemini-2.5-flash',
name='root_agent',
description='A helpful assistant for user questions.',
instruction='Answer user questions and use adk_tool to connect with specialized agents when needed',
tools=[adk_tool]
)

---

LangChain Example

Run

python examples/langchain/agent.py

Code

importasynciofromlangchain_openaiimportChatOpenAIfromlangchain.agentsimportAgentExecutor, create_openai_functions_agentfromlangchain_core.promptsimportChatPromptTemplate, MessagesPlaceholderfromdagent_toolimportlangchain_toolllm=ChatOpenAI(model="gpt-4o", temperature=0)
prompt=ChatPromptTemplate.from_messages([
("system", "You are a helpful assistant. Use the dagent tool to connect with specialized agents when needed."),
("human", "{input}"),
MessagesPlaceholder(variable_name="agent_scratchpad"),
])
agent=create_openai_functions_agent(llm, [langchain_tool], prompt)
agent_executor=AgentExecutor(agent=agent, tools=[langchain_tool], verbose=True)
# Runresponse=agent_executor.invoke({"input": "Review this Python code for bugs..."})
print(response["output"])

---

CrewAI Example

Run

python examples/crewai/agent.py

Code

fromcrewaiimportAgent, Task, Crewfromdagent_toolimportcrewai_tool# Create the dagent tool instancedagent=crewai_tool()
# Define agent with dagent toolresearcher=Agent(
role='Research Assistant',
goal='Help users by connecting to specialized agents when needed',
backstory='An intelligent assistant that can leverage the DAgent network for specialized tasks',
tools=[dagent],
verbose=True
)
# Create tasktask=Task(
description='Review this Python function for potential bugs: def add(a, b): return a - b',
agent=researcher,
expected_output='A detailed code review with identified issues and fixes'
)
# Run crewcrew=Crew(agents=[researcher], tasks=[task])
result=crew.kickoff()
print(result)

---

Configuration Options

Customize agent matching through the Requirement model:

fromdagent_tool.modelsimportRequirementrequirements=Requirement(
description="A Python code review assistant",
skills=["python", "code-review", "best-practices"],
preferred_llm_provider="OpenAI", # OpenAI, Anthropic, Google, Llama, Custommax_agent_cost=0.01, # Per-request cost limitmax_total_agent_cost=1.0, # Session cost limitstreaming=False,
is_multi_agent_system=False
)

Example Interactions

Once running, try prompts like:

Prompt	What Happens
"Review this Python function for bugs: def add(a,b): return a-b"	Routes to a code review specialist
"Write a haiku about distributed systems"	Routes to a creative writing agent
"Explain the CAP theorem in simple terms"	May answer directly or route to a technical explainer

Troubleshooting

Issue	Solution
AuthenticationError	Check your DAGENT_API_KEY is valid
InsufficientCreditsError	Top up credits at dagent.network
NoAgentFoundError	Broaden your requirements or remove skill constraints
ModuleNotFoundError: google.adk	Run pip install dagent-tool[adk]
ModuleNotFoundError: langchain	Run pip install dagent-tool[langchain]
ModuleNotFoundError: crewai	Run pip install dagent-tool[crewai]

Learn More

• dagent-tool on PyPI — Full SDK documentation
• Google ADK Docs — Agent Development Kit reference
• LangChain Docs — LangChain framework reference
• CrewAI Docs — CrewAI framework reference
• DAgent Network — Get API keys and explore available agents

License

MIT