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 agentmods add skills/mnlt/teleport/slacknpx skills add mnlt/teleport --skill slackgit clone --depth 1 https://github.com/mnlt/teleportWrote 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/mnlt/teleport/slack)<a href="https://agentmods.dev/skills/mnlt/teleport/slack"><img src="https://agentmods.dev/badge/skills/mnlt/teleport/slack.svg" alt="Measured on agentmods" 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 | $0.00048 | $0.01661 |
| Opus 5 | $0.00024 | $0.00830 |
| Sonnet 5 | $0.00010 | $0.00332 |
| Haiku 4.5 | $0.00005 | $0.00166 |
Grade B, and why
slack scanned grade B with 2 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
**Do NOT suggest editing `~/.claude/settings.local.json` manually.** The `teleport-setup add-key` command handles it with backup, validation, and masked input. Stop execution until the user has run the command and restar Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -sL -X POST -H "Authorization: Bearer $SLACK_BOT_TOKEN" \ How it starts
The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Slack
Operates Slack via its public Web API (https://slack.com/api/METHOD). Covers messaging, channels/DMs, users, files, search, reactions, and pins — no MCP server required.
Usage
- Use for: Posting to channels, reading recent history, listing channels/members, searching messages, managing reactions/pins.
- Skip for: Interactive back-and-forth (needs Events API / RTM), human approval flows, Enterprise Grid admin ops (SCIM / Admin API).
Credentials check
[ -n "${SLACK_BOT_TOKEN:-$SLACK_USER_TOKEN}" ] && echo "SLACK_TOKEN: PRESENT" || echo "SLACK_TOKEN: MISSING"
Never echo the variable directly — the value would appear in the conversation transcript. Use only the boolean pattern above.
If MISSING, respond to the user with EXACTLY this message (do NOT paraphrase, do NOT suggest manual JSON edits):
I need your slack credential. Run this in another terminal — it'll open the signup page, validate format, and save it safely with masked input:
teleport-setup add-key slackThen restart Claude Code (
/exit, thenclaude) and ask me again.
Do NOT suggest editing ~/.claude/settings.local.json manually. The teleport-setup add-key command handles it with backup, validation, and masked input. Stop execution until the user has run the command and restarted.
API
- Base URL:
https://slack.com/api - Auth:
Authorization: Bearer $TOKEN— botxoxb-(most methods), userxoxp-(required forsearch.*). Header only, never query param. - HTTP 200 on errors. Status alone means nothing — every response is JSON
{"ok": true|false, ...}; on false, read.error(channel_not_found,missing_scope,invalid_auth,ratelimited,not_in_channel,no_text). Always branch on.ok. - Content-Type:
application/json; charset=utf-8for writes; reads also accept form-encoded / GET query strings. - Rate limits: per-method tiers (Tier 1 ~1/min admin → Tier 4 100+/min; Special for
chat.postMessage~1/sec/channel + workspace cap). On 429, honorRetry-After: <seconds>header.
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 · 105 lines · 48 tokens per session scan B cac7cbd1ee23
slack is a skill published in the GitHub repository mnlt/teleport (8 stars, last pushed 4mo ago), licensed MIT. It adds 48 tokens to every session and 1,661 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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