Borrowing it
Nothing to install: this file belongs to OlliMakarova/mcp-metro. 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/OlliMakarova/mcp-metro/master/.claude/skills/gen-jwt/SKILL.mdgit clone --depth 1 https://github.com/OlliMakarova/mcp-metroWrote 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/ollimakarova/mcp-metro/gen-jwt)<a href="https://agentmods.dev/skills/ollimakarova/mcp-metro/gen-jwt"><img src="https://agentmods.dev/badge/skills/ollimakarova/mcp-metro/gen-jwt/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/ollimakarova/mcp-metro/gen-jwt"><img src="https://agentmods.dev/badge/skills/ollimakarova/mcp-metro/gen-jwt.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 | $0.00045 | $0.01405 |
| Opus 5 | $0.00023 | $0.00702 |
| Sonnet 5 | $0.00009 | $0.00281 |
| Haiku 4.5 | $0.00005 | $0.00140 |
Grade A, and why
gen-jwt 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 10d 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.
This is a copy
92% identical to gen-jwt — 17 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
JWT Token Generator
Generate a JWT token by running node scripts/generate-jwt.js with the appropriate parameters.
Parameter Extraction
Parse $ARGUMENTS and the user's request to extract:
- username (REQUIRED) — the user the token is issued to
- ttl (REQUIRED) — token lifetime in format
<N>s | <N>m | <N>d | <N>y(seconds, minutes, days, years) - request (optional) — ticket/issue ID if user mentions "ticket", "request", "issue", "REQ-", "JIRA-" etc. The param key is always
request - ip (optional) — allowed IP addresses/CIDR masks, comma-separated
- service (optional) — service name, passed via
-s - extra params (optional) — any other key=value pairs
Interactive Flow
Step 1: Validate required params
If username is missing or empty:
- Tell the user: "Username is required. Please specify the user the token should be issued to."
- Wait for response. Do not proceed without it.
If ttl is missing, not provided, or doesn't match <N>s | <N>m | <N>d | <N>y:
- Tell the user: "Token lifetime (TTL) is required in format:
<N>s(seconds),<N>m(minutes),<N>d(days), or<N>y(years). For example:30d,1y,8d. Please specify." - Wait for response. Do not proceed without a valid TTL.
Step 2: Ask about optional params (only if not already provided)
If the user did NOT mention a request/ticket:
- Ask: "Bind to a ticket? (enter the ticket ID, or press Enter to skip)"
- If user says "no", "skip", "-", or presses Enter — omit the
requestparam.
If the user did NOT mention IP restrictions:
- Ask: "Restrict by IP? (enter IP/CIDR values comma-separated, or press Enter to skip)"
- If user says "no", "skip", "-", or presses Enter — omit the
ipparam.
Step 3: Build and run the command
Construct the CLI command:
node scripts/generate-jwt.js -u <username> -ttl <ttl> [-s <service>] [-p "<params>"]
The -p value is a semicolon-separated string of key=value pairs built from:
request=<ticket>(if provided)ip=<addresses>(if provided)- Any extra key=value pairs from the user's message
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.
- 10d ago First seen · 112 lines · 45 tokens per session scan A 23a70b4caf70
gen-jwt is a skill published in the GitHub repository OlliMakarova/mcp-metro (0 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 1,405 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to gen-jwt, differing in 17 lines, and is treated as a copy.
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