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 JackVitick/socialync-mcp --skill schedule-social-postgit clone --depth 1 https://github.com/JackVitick/socialync-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/jackvitick/socialync-mcp/schedule-social-post)<a href="https://agentmods.dev/skills/jackvitick/socialync-mcp/schedule-social-post"><img src="https://agentmods.dev/badge/skills/jackvitick/socialync-mcp/schedule-social-post/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/jackvitick/socialync-mcp/schedule-social-post"><img src="https://agentmods.dev/badge/skills/jackvitick/socialync-mcp/schedule-social-post.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 | $0.00058 | $0.01024 |
| Opus 5 | $0.00029 | $0.00512 |
| Sonnet 5 | $0.00012 | $0.00205 |
| Haiku 4.5 | $0.00006 | $0.00102 |
Grade A, and why
schedule-social-post 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.
How it starts
The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Schedule or publish a Socialync post
Use the Socialync MCP server. Do not scrape social sites or open platform web apps to post.
Auth and first calls
The server is hosted at https://mcp.socialync.io/mcp. Auth is OAuth in the browser (Cursor, Claude, ChatGPT) or a Bearer API key from https://www.socialync.io/api-keys for clients that cannot open a browser (Grok Bot). If tools fail with auth errors, tell the user to reconnect Socialync in their client's MCP settings.
Before drafting:
list_profiles: every write takesprofileId. Never assume the default.list_connectionson that profile: skip disconnected platforms and tell the user to reconnect in Socialync settings.check_quota: plan, remaining posts, per-platform daily caps,maxScheduleMonths. Call this before every batch.validate_postwith the exact arguments you are about to submit. It cannot post anything; it tells you what the platform would reject.
Limits
- Free plan: 5 posts per calendar month, no credit card, MCP included. Paid plans start at $20/mo for unlimited posts and 5 connected accounts.
- One publish counts as one post no matter how many platforms it targets.
- 10 AI-created posts per day per brand on paid plans, 5 on free.
- Read live numbers from
check_quota. Do not hardcode.
Platform text limits (reject before submit):
| Platform | Limit | Notes |
|---|---|---|
| X | 280 | Each post must stand alone |
| Bluesky | 300 | Hard reject above this |
| Threads | 500 | Max 5 links, enforced |
| 3,000 | First 210 characters show | |
| 2,200 | First 125 shown | |
| TikTok | 2,200 | Video only. Caption is secondary to the hook |
| YouTube | 5,000 description | Video only. Title required; keep titles under 60 |
| effectively unlimited | Engagement drops after ~80 characters in feed |
Text and image posts publish immediately to Instagram, Facebook, X, LinkedIn, Threads, and Bluesky. Video (including TikTok and YouTube) goes out as a scheduled post using media already in the Socialync library (mediaId from list_media) or a public video URL. YouTube needs a title. You cannot receive a video file in chat: tell the user to upload it in Socialync, then attach by mediaId.
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 · 67 lines · 58 tokens per session scan A d0dd29b9f51f
schedule-social-post is a skill published in the GitHub repository JackVitick/socialync-mcp (0 stars, last pushed 12d ago), licensed MIT. It adds 58 tokens to every session and 1,024 once invoked, about $0.0003 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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