Aser is a lightweight, self-assembling AI Agent frame.
aser is an established Python project in the AI payments / x402 ecosystem, focused on a2a-protocol, agent, agents, ai. It currently has 470 GitHub stars and 33 forks, and sits alongside related tools like nano-currency-mcp-server, daydreams, x402-deploy, image-analysis-mcp, x402, agentic-rag-a2a-mcp.
Aser is a lightweight, self-assembling AI agent framework in Python, with a topic footprint that spans the agent-payment stack: a2a-protocol, mcp, erc8004 on-chain identity, RAG and multi-agent coordination.
"Self-assembling" is the interesting bet: agents that compose their own capabilities (and, via MCP + A2A, hire other agents’ capabilities) rather than following a fixed graph. Combined with on-chain identity, that points toward an agent economy where participants discover and pay each other without prior integration. Lightweight enough to read in an afternoon — a good framework to learn from.
Best for: Python developers experimenting with self-organizing multi-agent systems.
Aser is a minimalist, modular, and versatile AI agent framework. You can assemble an agent with just a few lines of code.

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Install from pypi:
pip install aser
Or clone the repository:
git clone https://github.com/AmeNetwork/aser.git
cd aser
pip install -r requirements.txt
Please refer to .env.example file, and create a .env file with your own settings. You don't need to configure all environment variables, just select the ones you use.
.env file example:
#MODEL
MODEL_BASE_URL=<your model base url>
MODEL_KEY=<your model key>
#Basic
from aser.agent import Agent
agent=Agent(name="aser agent",model="gpt-4.1-mini")
response=agent.chat("what's bitcoin?")
print(response)
# Full configuration
aser = Agent(
name="aser",
model="gpt-4o-mini",
tools=[web3bio, exa],
knowledge=knowledge,
memory=memory,
chat2web3=[connector],
mcp=[price],
trace=trace
)
If you clone the project source code, before running the examples, please run pip install -e . in the root directory, which allows Python to find and import the aser module from the local source code. If you install it via pip install aser , you can run the examples directly.
Aser is open-source and licensed under the MIT License.

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