Houdini MCP Server
Enables AI assistants to control SideFX Houdini 3D software, providing tools for scene management, node operations, rendering, and more through the Model Context Protocol.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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bamboovfx
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
LOG_LEVELLogging levelHOUDINI_HOSTHoudini machine IP/hostnameHOUDINI_PORThrpyc server portMCP_PORTMCP server HTTP portMCP_TRANSPORTTransport type (http, stdio, sse)HOUDINI_MCP_SEMAPHORE_LIMITCLAUDE_PROXY_URLSUMMARIZATION_MODELSUMMARIZATION_ENABLEDAUTO_SUMMARIZE_THRESHOLDTARGET_SUMMARY_TOKENSTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
52/52 tools missing one or more hints — get_scene_info (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_node (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); execute_code (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +49 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — execute_code deletes at line 87 (- Dangerous operation detection: Scans for patterns like hou.exit(), os.remove(), subprocess, etc.)
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — get_node_info (line 104: params[parm.name()] = parm.eval())
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tool test coverage
39/52 tools referenced in tests (75%)
Write tests that reference each tool by name so every tool has at least one test.
Tool description accuracy
get_node_info: description implies read-only but handler writes/deletes/executes
Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.
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