TrustChain Agent OS

Trust-native protocol layer for AI agents.

Every agent protocol (MCP, A2A, ACP, ANP) handles communication. None handle trust. TrustChain Agent OS is the missing layer underneath all of them — a gateway and a set of framework adapters that bring bilateral signed interaction records, NetFlow Sybil resistance, and automatic trust scoring to 12 major agent frameworks. 205 tests.

Read the full TrustChain overview → — what it is, how it works, and why it matters.

Built on trustchain-py and the trustchain Rust node.

Key Features

• Framework adapters — drop-in trust layer for 12 frameworks: LangGraph, CrewAI, AutoGen, OpenAI Agents, Google ADK, ElizaOS, Claude (Anthropic), Smolagents, PydanticAI, Semantic Kernel, Agno, and LlamaIndex; no agent code changes required beyond initialization
• MCP gateway — FastAPI server that exposes downstream MCP tool servers behind a trust middleware; every tool call is recorded as a bilateral interaction
• Trust-gated services — @service decorator enforces min_trust thresholds before any call reaches agent business logic
• TrustAgent primitive — lightweight agent abstraction with built-in identity, trust tracking, and service registry
• Automatic trust accumulation — interaction history builds over time; trust scores improve as parties transact honestly
• Fraud resistance — double-spend detection and hard-zero scoring propagate across the interaction graph

Installation

pip install trustchain-agent-os

Optional extras

pip install trustchain-agent-os[gateway]   # FastAPI + uvicorn for the MCP gateway
pip install trustchain-agent-os[viz]       # Streamlit + Plotly trust graph visualizations
pip install trustchain-agent-os[dev]       # pytest + pytest-asyncio

Requires Python 3.11+. Depends on trustchain-py>=2.0 and fastmcp>=3.0.

Quick Start

TrustAgent (minimal)

import asyncio
from agent_os import TrustAgent, TrustContext

buyer = TrustAgent(name="buyer")
seller = TrustAgent(name="seller")

@seller.service("compute", min_trust=0.0)
async def compute(data: dict, ctx: TrustContext) -> dict:
    return {"result": data["x"] ** 2}

async def main():
    for i in range(1, 11):
        ok, reason, result = await buyer.call_service(seller, "compute", {"x": i})
        print(
            f"Round {i}: {i}^2 = {result['result']}"
            f"  buyer={buyer.trust_score:.3f}  seller={seller.trust_score:.3f}"
        )

asyncio.run(main())

Trust scores grow with every completed interaction. After a few rounds the seller can raise min_trust to gate access to higher-value services.

Trust-gated service

@seller.service("premium_analysis", min_trust=0.7)
async def premium_analysis(data: dict, ctx: TrustContext) -> dict:
    # Only reachable after the buyer has established sufficient trust history
    return {"analysis": "..."}

MCP gateway

# gateway/server.py — run with: uvicorn gateway.server:app
from gateway import create_gateway

app = create_gateway(
    upstream_servers=[
        {"name": "tools", "url": "http://localhost:3000/mcp"},
    ],
    trust_threshold=0.5,   # minimum trust score to call any tool
)

pip install trustchain-agent-os[gateway]
uvicorn gateway.server:app --port 8080

Every tool call arriving at the gateway is checked against the caller's trust score. The result is recorded as a bilateral interaction block, building the caller's trust history over time.

Framework Adapters

Each adapter wraps a framework's native agent/crew/graph abstraction to add TrustChain identity and bilateral interaction recording. Adapters share a common interface through tc_frameworks.base.TrustChainAdapter.

LangGraph

from tc_frameworks.adapters.langgraph_adapter import LangGraphTrustAdapter

adapter = LangGraphTrustAdapter(agent_name="my-langgraph-agent")
result = await adapter.invoke({"messages": [{"role": "user", "content": "hello"}]})

CrewAI

from tc_frameworks.adapters.crewai_adapter import CrewAITrustAdapter

adapter = CrewAITrustAdapter(agent_name="my-crew")
result = await adapter.invoke({"task": "summarize recent news"})

AutoGen

from tc_frameworks.adapters.autogen_adapter import AutoGenTrustAdapter

adapter = AutoGenTrustAdapter(agent_name="my-autogen-agent")
result = await adapter.invoke({"message": "analyze this dataset"})

OpenAI Agents SDK

from tc_frameworks.adapters.openai_agents_adapter import OpenAIAgentsTrustAdapter

adapter = OpenAIAgentsTrustAdapter(agent_name="my-openai-agent")
result = await adapter.invoke({"input": "draft an email"})

Google ADK

from tc_frameworks.adapters.google_adk_adapter import GoogleADKTrustAdapter

adapter = GoogleADKTrustAdapter(agent_name="my-adk-agent")
result = await adapter.invoke({"query": "search for recent papers"})

ElizaOS

from tc_frameworks.adapters.elizaos_adapter import ElizaOSTrustAdapter

adapter = ElizaOSTrustAdapter(agent_name="my-eliza-agent")
result = await adapter.invoke({"message": "hello"})

All adapters are cached — the underlying agent/crew/graph is built once on first invocation and reused across calls.

Architecture

┌─────────────────────────────────────────────────────────────────┐
│  Your Agent (LangGraph / CrewAI / AutoGen / OpenAI / ADK / ...) │
├──────────────────────────┬──────────────────────────────────────┤
│  tc_frameworks adapters  │  agent_os.TrustAgent + decorators    │
│  (per-framework wrappers)│  (lightweight agent primitive)       │
├──────────────────────────┴──────────────────────────────────────┤
│  gateway/                                                        │
│  FastAPI MCP gateway · trust middleware · interaction recorder  │
│  peer registry · trust_tools (MCP tool wrappers)               │
├─────────────────────────────────────────────────────────────────┤
│  trustchain-py  (Python)                                        │
│  Identity · HalfBlock · BlockStore · TrustEngine · NetFlow      │
├─────────────────────────────────────────────────────────────────┤
│  trustchain-node  (Rust sidecar, optional)                       │
│  QUIC P2P · SQLite WAL · transparent proxy :8203                │
└─────────────────────────────────────────────────────────────────┘

Project Structure

trustchain-agent-os/
├── agent_os/
│   ├── agent.py          TrustAgent: identity, service registry, call_service
│   ├── context.py        TrustContext: per-call trust metadata
│   └── decorators.py     @service decorator with min_trust enforcement
│
├── gateway/
│   ├── server.py         FastAPI application factory (create_gateway)
│   ├── middleware.py     Trust enforcement middleware
│   ├── recorder.py       Bilateral interaction recording
│   ├── registry.py       Peer and upstream server registry
│   ├── node.py           TrustChain node lifecycle management
│   ├── config.py         Gateway configuration (UpstreamServer, GatewayConfig)
│   └── trust_tools.py    MCP tool wrappers with trust metadata
│
├── tc_frameworks/
│   ├── base.py           TrustChainAdapter base class
│   ├── adapters/         Real framework adapters (12)
│   │   ├── langgraph_adapter.py
│   │   ├── crewai_adapter.py
│   │   ├── autogen_adapter.py
│   │   ├── openai_agents_adapter.py
│   │   ├── google_adk_adapter.py
│   │   ├── elizaos_adapter.py
│   │   ├── claude_agent_adapter.py
│   │   ├── smolagents_adapter.py
│   │   ├── pydantic_ai_adapter.py
│   │   ├── semantic_kernel_adapter.py
│   │   ├── agno_adapter.py
│   │   └── llamaindex_adapter.py
│   └── mock/             Mock adapters for testing (6)
│
├── examples/             Runnable examples
│   ├── hello_trust.py        Minimal TrustAgent demo
│   ├── trust_gate.py         Trust-gated service demo
│   ├── framework_interop.py  11 frameworks, one trust ledger (USB-C of trust)
│   ├── multi_provider_team.py  Collaborative pipeline with trust gates
│   ├── agent_marketplace.py  Competitive agents with Sybil detection
│   ├── marketplace.py        Multi-agent marketplace simulation
│   ├── network.py            P2P network simulation
│   ├── llm_agents.py         LLM-backed agents with trust
│   └── demo_gateway.py       MCP gateway demo
│
├── docs/
│   ├── TRUSTCHAIN-OVERVIEW.md  Comprehensive project overview and use cases
│   └── results/                Demo run outputs with analysis
│
└── tests/
    ├── integration/      126 integration tests
    └── smoke/            45 smoke, e2e, and stress tests

Why TrustChain vs. API Keys

Development

git clone https://github.com/viftode4/trustchain-agent-os.git
cd trustchain-agent-os
pip install -e ".[dev]"
pytest tests/ -v

The CI pipeline checks out trustchain-py from its sibling repository before install.

Related Projects

• trustchain — Rust node: production sidecar binary, 4 crates, QUIC P2P, MCP server, 214 tests
• trustchain-py — Python SDK: zero-config trustchain.init(), full protocol bindings, 174 tests

License

MIT