Caption-Pack MCP Server

by jeshuadomingo-byte Your server? Claim it

not responding

Caption-Pack is listed as active in the registry but did not answer our last check. It exposes 3 tools.

Deterministic social-caption API: hooks, bodies, CTAs + hashtags as JSON. No LLM in the loop.

Uptime history 21 days of history · worst day 0%

21 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

232 ms

Response time

average over 24h

open, no key

Access

streamable-http

Caption-Pack does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add caption-pack --transport http https://caption-pack-mcp.onrender.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://caption-pack-mcp.onrender.com/mcp

~/.codex/config.toml

[mcp_servers.caption-pack]
url = "https://caption-pack-mcp.onrender.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "caption-pack": {
      "url": "https://caption-pack-mcp.onrender.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "caption-pack": {
      "type": "http",
      "url": "https://caption-pack-mcp.onrender.com/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

balance

check_balance

Use before generating when you're unsure the key still has credits, or when the user asks about their plan, tier, or expiry. Shows remaining API credits, key tier, and expiry.

generate

generate_captions

Use when the user wants ready-to-post social captions — hooks, post bodies, CTAs, and hashtags as JSON for LinkedIn, Instagram, TikTok, or X. Deterministic template engine (no LLM): best for on-brand, repeatable captions, not open-ended creative writing. tone: warm | bold | professional | playful platform: linkedin | instagram | tiktok | x count: 1-10 captions. Costs 1 API credit per call.

mint

mint_free_trial

Use when no API key is configured and the user wants to try Caption-Pack free. Only call after the user agrees to the free tier — never mint silently. Mints a 25-call trial API key (no card, no account). Abuse guards: one key per IP per day, 7-day expiry, free keys can never convert to paid. The key is shown ONCE — save it as CAPTIONPACK_API_KEY immediately.

Endpoints

URL	Transport	State	Latency	Checked
https://caption-pack-mcp.onrender.com/mcp	streamable-http	answering	232 ms	11 min ago

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Caption-Pack — questions

Answers built from our own checks of this server.

What can Caption-Pack do?

It exposes 3 tools, read directly from the server on our last check. Among them: check_balance, generate_captions, mint_free_trial. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Caption-Pack working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 232 ms. The bar chart above shows every period we have measured.

The registry lists Caption-Pack as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Caption-Pack?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Caption-Pack need an API key?

No. Caption-Pack completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.