functualize-mcp

Status: Published — Independently installable from PyPI.

MCP delivery adapter plugin for functualize — exposes jobs as MCP tools via FastMCP. External AI agents (Goose, Claude, Cursor) can discover and invoke functualize jobs through the standardized Model Context Protocol interface without any manual wiring.

Installation

pip install functualize-mcp

Quick Start

from functualize_mcp import JobToolTranslator, MCPToolDef, SchemaExporter

# Translate a job descriptor into an MCP tool definition
translator = JobToolTranslator()
tool_def = translator.translate(my_job_descriptor)
print(tool_def.name, tool_def.description)

# Export all job schemas as OpenAI function calling JSON
exporter = SchemaExporter(translator)
openai_json = exporter.export_openai(descriptors)

Features

• Automatic job-to-tool translation with JSON Schema input generation from config models
• Dual transport support: stdio (default) and HTTP+SSE for networked agents
• Job visibility filtering via include/exclude tags and job name exclusion lists
• Multi-format schema export: JSON (MCP), Markdown, OpenAI function calling, TypeScript
• Multi-server management: start, list, and stop background HTTP servers
• Workflow inspection and advancement tools for paused workflow steps
• Async job execution with polling via run_job_async / get_execution_status
• AI outbound gate strategy for workflow checkpoint serialization

API Reference

Public classes and functions exported by this plugin:

• MCPAdapterPlugin — Plugin entry point implementing the AdapterPlugin protocol; registers MCP tools at boot
• MCPConfig — Pydantic configuration model controlling transport, port, host, tag filters, and management features
• MCPServer — FastMCP wrapper that discovers jobs, registers tools, and serves via stdio or HTTP+SSE
• JobToolTranslator — Translates JobDescriptors into MCPToolDef instances using docstrings and config schemas
• MCPToolDef — Frozen dataclass representing an MCP tool (name, description, input_schema, annotations)
• SchemaExporter — Exports job schemas in JSON, Markdown, OpenAI, and TypeScript formats
• MCPToolRegistry — Registers core MCP tools (discover_jobs, get_job_schema, run_job, run_job_async, get_execution_status)
• MCPHistoryToolRegistry — Registers execution history inspection tools
• MCPManagementToolRegistry — Registers multi-server management meta-tools
• MCPTaskToolRegistry — Registers task-domain MCP tools
• WorkflowToolProvider — Registers workflow state inspection and resume tools
• ServerManager — Manages background MCP HTTP server processes (start, list, stop)
• ServerInfo — Dataclass describing a managed server (name, directory, port, pid, status)
• AIOutboundGateResolver — Gate strategy resolver for AI outbound workflow checkpoints
• register_ai_outbound_gate_strategy() — Registers the ai_outbound gate strategy and preset with an app

Development

Run plugin tests:

uv run pytest plugins/adapters/functualize-mcp/tests/ -v