Integration Guide

How to use Attestix with LangChain, OpenAI Agents SDK, CrewAI, plain Python, and other MCP clients.

Attestix integrates with three agent frameworks as production-ready shipments in v0.3.0, and with any MCP-compatible client through the generic MCP server.

Production integrations

LangChain

First-party BaseCallbackHandler. Every tool call, LLM call, and chain step is attested.

OpenAI Agents SDK

Native MCP server via MCPServerStdio. All 47 Attestix tools discovered automatically.

CrewAI

MCPServerAdapter per agent. Crew-wide compliance profile and UCAN hand-offs.

Example integrations via MCP

Any MCP client can consume Attestix. The following ship with reference configs as example integrations, not production-certified:

Dify / mcp_servers in the workflow config
Google ADK / McpClient tool registration
Microsoft Semantic Kernel / MCP plugin layer
Strands / MCP runtime binding
Claude Desktop, Cursor, Continue, Windsurf, VS Code

As a plain Python library

You can import Attestix services directly without running the MCP server.

from services.identity_service import IdentityService
from services.credential_service import CredentialService
from services.compliance_service import ComplianceService
from services.provenance_service import ProvenanceService

identity_svc = IdentityService()
credential_svc = CredentialService()
compliance_svc = ComplianceService()
provenance_svc = ProvenanceService()

agent = identity_svc.create_identity(
    display_name="quarterly-analyst-v2",
    source_protocol="manual",
    capabilities=["data_analysis", "reporting"],
    issuer_name="VibeTensor",
    expiry_days=365,
)

All services share the same Ed25519 signing key (auto-generated on first use) and the same JSON storage files.

As an MCP server (stdio)

{
  "mcpServers": {
    "attestix": {
      "command": "attestix",
      "args": ["mcp"]
    }
  }
}

As an MCP server (HTTP)

attestix mcp --transport http --port 8501

Then connect any MCP client to http://localhost:8501/mcp.

MCP tool reference / full 47-tool catalogue
Offline verify walkthrough / how regulators verify a VC
Base L2 testnet anchor walkthrough / put artefact hashes on chain