Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Difz25x/roblox-mcp-difz --skill roblox-mcpgit clone --depth 1 https://github.com/Difz25x/roblox-mcp-difzWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/difz25x/roblox-mcp-difz/roblox-mcp)<a href="https://agentmods.dev/skills/difz25x/roblox-mcp-difz/roblox-mcp"><img src="https://agentmods.dev/badge/skills/difz25x/roblox-mcp-difz/roblox-mcp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/difz25x/roblox-mcp-difz/roblox-mcp"><img src="https://agentmods.dev/badge/skills/difz25x/roblox-mcp-difz/roblox-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00076 | $0.04220 |
| Opus 5.5 | $0.00030 | $0.01688 |
| Sonnet 5.5 | $0.00015 | $0.00844 |
| Haiku 4.5 | $0.00008 | $0.00422 |
Grade A, and why
roblox-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Roblox MCP — Agent Engineering & Mastery Skill
This skill guides AI agents (Claude Code, Cursor, Windsurf, Copilot, etc.) on how, when, and why to use the roblox-mcp tool suite to automate, reverse-engineer, inspect, and test Roblox games across single or multiple Windows processes.
1. System Architecture & Session Routing
Roblox MCP operates as a bidirectional bridge connecting AI agents to in-game Roblox executor clients over WebSocket (ws://localhost:28429) with automatic long-polling HTTP Stream fallback. A background Discovery Router (http://127.0.0.1:58295) automatically resolves custom server ports.
Universal Session Targeting (workerId & pid)
Every tool accepts two universal, optional session routing arguments as its first properties:
workerId?: string: Target a specific client session by ID, username, or session name (e.g."Worker_14388","Player1").pid?: number: Target a specific Roblox client window by operating system Process ID (e.g.14388).- If omitted: The tool automatically executes across ALL active connected sessions or defaults to the primary active session.
2. Universal Argument Normalization (AI Error Tolerance)
The server features automatic bidirectional argument normalization. You do not need to worry about rigid schema mismatches:
- Path & Instance Aliases:
target_path,script_path,instance_path,target_part,part_path,path,target, andinstanceare completely interchangeable. - Casing: Both
camelCase(e.g.targetPath,placeId,jobId) andsnake_case(e.g.target_path,place_id,job_id) are accepted everywhere. - Code & Content:
code,script,source,content, andluaare interchangeable. - Property Maps:
property_mapandpropertiesaccept either a stringified JSON string ('{"Transparency":0.5}') or a direct JSON object ({ "Transparency": 0.5 }). - Player Targets:
player,player_name,username, andtarget_playerare interchangeable. - Coordinates & Teleport: Accepts
coordinates: { x, y, z }, flatx, y, z,player: "Name", ortarget_part: "workspace.Part".
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 207 lines · 76 tokens per session scan A e63f5eb0dc77
roblox-mcp is a skill published in the GitHub repository Difz25x/roblox-mcp-difz (12 stars, last pushed 5d ago), licensed MIT. It adds 76 tokens to every session and 4,220 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-02.
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