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 New1Direction/korgex --skill building-an-mcp-servergit clone --depth 1 https://github.com/New1Direction/korgexWrote 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/new1direction/korgex/building-an-mcp-server)<a href="https://agentmods.dev/skills/new1direction/korgex/building-an-mcp-server"><img src="https://agentmods.dev/badge/skills/new1direction/korgex/building-an-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/new1direction/korgex/building-an-mcp-server"><img src="https://agentmods.dev/badge/skills/new1direction/korgex/building-an-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 | $0.00020 | $0.00385 |
| Opus 5 | $0.00010 | $0.00192 |
| Sonnet 5 | $0.00004 | $0.00077 |
| Haiku 4.5 | $0.00002 | $0.00038 |
Grade A, and why
building-an-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 9d 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.
What it actually says
MCP is how an agent gains capabilities it doesn't have natively (a service, a database, an internal API). korgex is MCP-native — it can both consume servers and act as one.
Connecting an existing server (most common)
korgex mcp catalogto see curated presets;korgex mcp add <alias> [--global]to add one. For a custom server:--command <cmd> --args "…"(stdio) or--url <url> --header "Authorization: Bearer ${TOKEN}"(remote).- Put secrets in env and reference them as
${VAR}in the config — never inline a token. - korgex auto-connects configured servers at startup; tools appear namespaced as
server__tool.
Authoring a server
- Decide the tools: each gets a name, a one-line description (this is what the
model sees), and a JSON-Schema
inputSchema. Keep each tool single-purpose. - Implement the protocol: handle
initialize→tools/list→tools/callover JSON-RPC (stdio or HTTP). Return results as content blocks; surface tool faults as an error result, not a crash. - Validate inputs at the boundary and treat all args as untrusted (see security-review). Don't expose destructive operations without a guard.
- Test the handler purely (feed it requests, assert responses) before wiring a host.
- Register it with
korgex mcp addand confirm tools list + a sample call work.
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.
- 9d ago First seen · 30 lines · 20 tokens per session scan A 9565305f4eae
building-an-mcp-server is a skill published in the GitHub repository New1Direction/korgex (5 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 385 once invoked, about $0.0001 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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