Houdini MCP Server
An MCP server for controlling SideFX Houdini via hrpyc, enabling AI assistants to interact with Houdini sessions.
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.
How we verified
Verified is a snapshot. Live keeps it current, and builds your track record.
⚡ Connect GitHub → continuous verification on every pushwhy connect →Who stands behind it
oculairmedia
Source: Glama
Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →
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_LIMITHOUDINI_MCP_ALLOW_BYPASSCLAUDE_PROXY_URLSUMMARIZATION_MODELSUMMARIZATION_ENABLEDAUTO_SUMMARIZE_THRESHOLDTARGET_SUMMARY_TOKENSRUN_LIVE_REMOTE_CHECKHOUDINI_RPC_TOKENor . See [docs/remote-listener.md](docs/remote-listener.md).HOUDINI_RPC_BIND_HOSTand opt in with HOUDINI_RPC_TRUSTED_NETWORK=1HOUDINI_RPC_BIND_PORTTool 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 94 (- Dangerous operation detection: hou.exit(), os.remove(), subprocess,)
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
41/52 tools referenced in tests (79%)
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.
Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.
[](https://m8ven.ai/mcp/oculairmedia/houdini-mcp)?variant=verified from the URL.Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.
https://m8ven.ai/api/mcp/tool-check