Borrowing it
Nothing to install: this file belongs to Vollkorn-Games/godot-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Vollkorn-Games/godot-mcp/main/.agents/skills/mcp-server/SKILL.mdgit clone --depth 1 https://github.com/Vollkorn-Games/godot-mcpWrote 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/vollkorn-games/godot-mcp/mcp-server)<a href="https://agentmods.dev/skills/vollkorn-games/godot-mcp/mcp-server"><img src="https://agentmods.dev/badge/skills/vollkorn-games/godot-mcp/mcp-server/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/vollkorn-games/godot-mcp/mcp-server"><img src="https://agentmods.dev/badge/skills/vollkorn-games/godot-mcp/mcp-server.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 | $0.00184 | $0.02264 |
| Opus 5 | $0.00092 | $0.01132 |
| Sonnet 5 | $0.00037 | $0.00453 |
| Haiku 4.5 | $0.00018 | $0.00226 |
Grade A, and why
mcp-server 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 11d 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 — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Build and maintain an MCP server
Scaffolding an MCP server is the easy 10%. The heavy lifting is everything after init: writing tool definitions the agent reads correctly, extending the surface without breaking agents that already depend on it, defending against tool poisoning and prompt injection, and operating the thing once it is remote. This skill covers the whole lifecycle. The deep reference for each phase is the vendored OKF bundle in references/; SKILL.md is the procedure.
Target the current protocol
MCP uses date-string protocol revisions. As of 2026-06-21 the current stable revision is 2025-11-25 (it superseded 2025-06-18); a stateless-core revision 2026-07-28 is the imminent next release. Build against 2025-11-25 and let the SDK negotiate older clients. The production SDK is @modelcontextprotocol/sdk (v1.x, TypeScript). The split @modelcontextprotocol/server + /client packages are the unreleased V2 line, not current. Full protocol surface, lifecycle, and result shapes in protocol.md.
Step 1: Pick the transport
| Use | Transport | Why |
|---|---|---|
| Local, client spawns the server as a subprocess, one user | stdio | No auth, no sessions, no scaling. Default for local tools. Log to stderr only. |
| Remote, hosted, multiple clients | Streamable HTTP | Single endpoint (POST + optional SSE upgrade), Mcp-Session-Id, OAuth, you own scaling and ops. |
Prefer stdio until you genuinely need remote multi-client access. The old HTTP+SSE transport is deprecated (replaced by Streamable HTTP in 2025-03-26). Transport mechanics, the stdio-vs-HTTP operational cliff, and sessions are in protocol.md and maintenance.md.
Step 2: The five layers
Every server, regardless of target, has the same skeleton:
- Server & transport (
src/index.ts) — entry point, lifecycle, cleanup, chosen transport. - Tool definitions (
src/tool-definitions.ts) — the contract the agent reads to decide what to call. The single most important file. - Router & handlers (
src/tool-router.ts,src/handlers/*.ts) — dispatch, validation, response shaping. - The bridge (
src/executor.ts,scripts/*) — how you actually talk to the target. 80% of the work. - Security & validation (
src/utils.ts) — input validation,execFileoverexec, path checks, tool filtering.
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 105 lines · 184 tokens per session scan A 2f79819de0ef
mcp-server is a skill published in the GitHub repository Vollkorn-Games/godot-mcp (3 stars, last pushed 1mo ago), licensed MIT. It adds 184 tokens to every session and 2,264 once invoked, about $0.0009 per session on Opus 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 2026-08-31.
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