Deny-by-default MCP Streamable HTTP projection for Hedron (Beta)
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# hedron-mcp [](https://pypi.org/project/hedron-mcp/) [](https://pypi.org/project/hedron-mcp/) [](https://github.com/eddiethedean/hedron/actions/workflows/ci.yml) [](https://github.com/eddiethedean/hedron/blob/main/LICENSE) Deny-by-default MCP Streamable HTTP projection for Hedron. Disabled and empty until resources and tools are explicitly registered. MCP never grants authority beyond the authenticated principal. Installing the package without registrations remains a no-op empty server. Also available as the flagship extra `hedron[mcp]`. **Package maturity:** Beta (`0.2.x`) · pin `>=0.2.0,<0.3` Production-grade for the declared Supported inventory (phase 0.32 / RFC-0065). Mutating tools remain Experimental (`allow_mutations=True`). ## Install ```bash pip install "hedron-mcp>=0.2.5,<0.3" # or uv add "hedron-mcp>=0.2.5,<0.3" # via flagship extra: pip install "hedron[mcp]>=1.0.0" ``` Requires Python 3.11–3.14. ## Quick start ```python from hedron import Hedron from hedron_mcp import McpProjection, McpResource, McpTool, mount_mcp app = Hedron( title="MCP demo", security="standard", session_secret="dev-only", ) # Prefer session / host auth after SessionMiddleware is installed. # Do not read request.session without that middleware. projection = McpProjection( enabled=True, principal_resolver=lambda request: getattr(request, "user", None), ) projection.register_resource(McpResource(uri="hedron://page/home", name="home")) projection.register_tool( McpTool( name="status", schema={"type": "object", "properties": {}}, mutate=False, handler=lambda: {"ok": True}, ) ) mount_mcp(app, projection) ``` ## License MIT
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