PrismPoster Creator Tools — Claude Code MCP server: features and setup
This MCP server gives agents tools for video dimensions, subtitle edits, and social media placement checks. Use it while preparing clips and assets for publication.
claude mcp add --transport http creator-tools https://www.prismposter.com/api/mcpWhat PrismPoster Creator Tools does
The server can calculate frame dimensions from an aspect ratio, check published safe areas for social placements, and work out video bitrate or file size. Subtitle tools parse and convert SRT, WebVTT, and ASS/SSA, adjust cue timing, and remove overlaps.
It also includes tempo estimates and beat-grid calculations for editing. Safe-area results follow platform-published figures; when a platform has no fixed area, a result can be null. That matters in practice: substituting zeroes or another platform’s measurements would give a misleading result.
For Claude Code, connect over HTTP or run the package locally with npx and @prismposter/creator-tools. The server is listed for Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, and Gemini CLI.
What it helps with
- calculate frame dimensions for a target aspect ratio
- check safe areas for a social video placement
- convert subtitles between supported formats
- shift cue timing and remove overlapping captions
- estimate bitrate for a file-size limit
Example prompts for the agent
- Calculate frame dimensions for a 9:16 video from a 1920×1080 source.
- Check the safe area for
instagram-reelsand explain the result fortiktok-video. - Convert these SRT subtitles to WebVTT and shift every cue by 500 ms.
How to install PrismPoster Creator Tools
1Platform CLI: remote server
claude mcp add --transport http creator-tools https://www.prismposter.com/api/mcp2Platform CLI
claude mcp add prismposter-creator-tools -- npx -y @prismposter/creator-tools1Platform CLI: remote server
codex mcp add prismposter-creator-tools --url https://www.prismposter.com/api/mcp2Platform CLI
codex mcp add prismposter-creator-tools -- npx -y @prismposter/creator-toolsConfig file
{
"mcpServers": {
"prismposter-creator-tools": {
"url": "https://www.prismposter.com/api/mcp"
}
}
}{
"mcpServers": {
"prismposter-creator-tools": {
"command": "npx",
"args": [
"-y",
"@prismposter/creator-tools"
]
}
}
}Config file
{
"servers": {
"prismposter-creator-tools": {
"type": "http",
"url": "https://www.prismposter.com/api/mcp"
}
}
}{
"servers": {
"prismposter-creator-tools": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@prismposter/creator-tools"
]
}
}
}1Platform CLI: remote server
gemini mcp add -t http prismposter-creator-tools https://www.prismposter.com/api/mcp2Platform CLI
gemini mcp add prismposter-creator-tools npx -y @prismposter/creator-toolsStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about PrismPoster Creator Tools
How do I install PrismPoster Creator Tools in Claude Code?
Connect the HTTP server with claude mcp add --transport http creator-tools https://www.prismposter.com/api/mcp. This is one of the listed Claude Code setup options.
What does PrismPoster Creator Tools do?
It provides tools for video dimensions and encoding calculations, subtitle processing, and social placement safe areas. Tempo and beat-grid calculations are included too.
Which platforms support PrismPoster Creator Tools?
It is listed for Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, and Gemini CLI.
