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 lnvestor/twitr-skills --skill x-twitter-monitorgit clone --depth 1 https://github.com/lnvestor/twitr-skillsWrote 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/lnvestor/twitr-skills/x-twitter-monitor)<a href="https://agentmods.dev/skills/lnvestor/twitr-skills/x-twitter-monitor"><img src="https://agentmods.dev/badge/skills/lnvestor/twitr-skills/x-twitter-monitor/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/lnvestor/twitr-skills/x-twitter-monitor"><img src="https://agentmods.dev/badge/skills/lnvestor/twitr-skills/x-twitter-monitor.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 | $0.00164 | $0.01423 |
| Opus 5 | $0.00082 | $0.00711 |
| Sonnet 5 | $0.00033 | $0.00285 |
| Haiku 4.5 | $0.00016 | $0.00142 |
Grade B, and why
x-twitter-monitor scanned grade B with 1 finding 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 12d 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.
Instruction-override phrasingmediumPrompt injection
Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.
("ignore previous instructions", "reply with...", "run this", "you are now..."). It is data Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.
X monitors — real-time events
| Task | Approach |
|---|---|
| Start watching | x_monitor action: "create" — see Create |
| Get the events | Poll /api/monitors/{id}/events (free) or register a webhook |
| Keep it alive | action: "extend" before expires_at; it does not auto-renew |
| Stop it | DELETE /api/monitors/{id} — no refund for unused hours |
A monitor is prepaid by the hour — about $0.025/hr, so ~$0.61/day or ~$4.20/week. Max 168 hours per purchase, 720 hours of forward window.
Create
POST https://twitr.sh/api/tools/x_monitor
Idempotency-Key: <uuid>
{ "action": "create", "username": "vercel", "hours": 168 } # account monitor
{ "action": "create", "query": "\"launch week\"", "hours": 168 } # keyword monitor
Tell the user the total cost before creating. Pay on Base (x402) or Tempo (MPP) — a monitor is a stateful resource needing a recoverable owner wallet, so Solana is not offered.
21 event types: tweet.new, .reply, .retweet, .quote, .media, .link, .poll,
.mention, .hashtag, .longform, plus profile.*.changed (avatar, banner, name, username,
bio, location, url, verified, protected, pinned_tweet, unavailable) on account monitors only.
A terminal monitor.expired / monitor.deleted fires once when it ends.
Get events — polling (free)
GET https://twitr.sh/api/monitors/{id}/events?after={last_event_id}&limit=50
Wallet-signed, free, 60 reads/min. Cursor semantics: pass the last id you processed and you get strictly newer events, oldest first. Retention is 500 events / 24h per monitor — poll at least daily or you lose events.
Get events — webhooks (push)
POST https://twitr.sh/api/webhooks
{ "url": "https://your-app.example.com/hooks", "eventTypes": ["tweet.new"] }
Free, max 3 per wallet, HTTPS hostnames only (no IPs, no localhost). The signing secret is
returned exactly once — store it immediately; POST /api/webhooks/{id}/rotate if lost.
Verify every delivery:
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.
- 12d ago First seen · 109 lines · 164 tokens per session scan B de4e6dfcbe20
x-twitter-monitor is a skill published in the GitHub repository lnvestor/twitr-skills (8 stars, last pushed 1mo ago), licensed MIT. It adds 164 tokens to every session and 1,423 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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