Rast Creator Tools

Rast Creator Tools — remote MCP server

Free, no-auth remote MCP server with deterministic tools for short-form video creators: Reels / TikTok / Shorts safe zones, caption placement checks, video bitrate & file-size math, SRT subtitle validation and platform export settings. It exposes the free creator tools of rastcreative.com/en/tools/ to AI assistants (Claude, ChatGPT, Gemini, Cursor, VS Code, …).

Endpoint (Streamable HTTP):

https://rast-creator-tools-mcp.studio-c25.workers.dev/v1/mcp

Health: https://rast-creator-tools-mcp.studio-c25.workers.dev/health · Privacy: https://rastcreative.com/en/tools/creator-tools-mcp-privacy/ · Terms: https://rastcreative.com/en/tools/creator-tools-mcp-terms/

• No API key, no sign-up, no user data stored, no logging, no outbound requests.
• Stateless and deterministic; all tools are read-only (readOnlyHint: true, idempotentHint: true, openWorldHint: false).
• Every result includes a source link to the matching rastcreative.com tool page.

Tools

Connect

Claude (claude.ai / Desktop) → Settings → Connectors → *Add custom connector* → paste the endpoint URL.

ChatGPT (developer mode) → Settings → Connectors → *Create* → endpoint URL, authentication *None*.

Gemini Apps Developer Mode → https://gemini.google.com/devmode → *Create new* → endpoint URL, authentication *none*.

Cursor / VS Code / any client with remote MCP support:

{

"mcpServers": { "rast-creator-tools": { "url": "https://rast-creator-tools-mcp.studio-c25.workers.dev/v1/mcp" } } }

stdio-only clients (via mcp-remote):

{

"mcpServers": { "rast-creator-tools": { "command": "npx", "args": ["-y", "mcp-remote", "https://rast-creator-tools-mcp.studio-c25.workers.dev/v1/mcp"] } } }

Run locally over stdio (no network needed):

npm install && npm run build:stdio

node dist/stdio.mjs # or: docker build -t rast-creator-tools . && docker run -i --rm rast-creator-tools

Example prompts

• What is the safe zone for a 1080x1920 TikTok video?
• Is a caption box at y = 1550 px on a 1080x1920 frame covered by the Reels interface?
• How big will a 3-minute 4K 30 fps YouTube export at 45 Mbps be?
• What bitrate do I need to keep a 90-second 1080p video under 100 MB?
• Check this SRT for overlaps, reading speed and broken characters: *(paste subtitles)*
• What export settings should I use for an HDR YouTube upload?

Raw request

curl -s -X POST https://rast-creator-tools-mcp.studio-c25.workers.dev/v1/mcp \

-H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream' \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"get_safe_zone","arguments":{"platform":"reels"}}}'

Endpoints

Develop & self-host

TypeScript, MCP TypeScript SDK, Cloudflare Workers (free plan is enough).

npm install

npm test # vitest (tools + HTTP/MCP round trips) npm run typecheck npm run dev # wrangler dev → http://127.0.0.1:8787 npm run smoke # health + initialize + tools/list + tools/call over real HTTP npx wrangler deploy # → https://rast-creator-tools-mcp. .workers.dev

src/index.ts Worker router (/v1/mcp, /health, /, /.well-known) src/server.ts McpServer, instructions, tool schemas + annotations src/tools/*.ts pure, deterministic tool logic src/data/ safe-zone and export-spec data (from rastcreative.com) test/ vitest docs/ Google Connected Apps registration notes

More free tools

Browser versions of these tools and more: [rastcreative.com/en/tools/](https://rastcreative.com/en/tools/) — by Rast Creative Studio.

License

MIT © Rast Creative Studio