PrismPoster Creator Tools

Install

Works with Claude Code, VS Code, Codex, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/prismposter-com-creator-tools

About

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools

7 read · 0 write · 0 deleteRead-only

Secrets

None asked for

Install scripts

None found

Runs as

Node.js package

Tools (7)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• calculate_aspect_ratioCalculate aspect ratio and crop/pad planread-only

  Reduce any pixel size to its simplest aspect ratio (1920x1080 is 16:9) and the nearest even size an H.264 encoder accepts, and, given a target ratio, solve the missing width or height and return the centre-crop and letterbox/pillarbox plans with the px trimmed or added per edge. Use this for arbitrary sizes and ratios (cinema 2.39:1, a client's 4:5); when the target is a named platform placement, use get_social_media_placement with sourceWidth/sourceHeight instead, which picks the right ratio for you. Errors on a non-integer or out-of-range size, or on only one of targetRatioW/targetRatioH.

• check_safe_areaCheck an element against a placement safe arearead-only

  Check whether a rectangle (a caption, logo or button, in px on the placement's own frame, origin top-left) stays inside the placement's safe area, and by how many px it intrudes past each edge if not. Use this to validate a layout before export; use get_social_media_placement for the raw insets. Returns verdict "inside", "intrudes" or "unknown"; "unknown" means the platform publishes no fixed safe area (TikTok) and comes with the reason instead of a guess. Errors on an unknown placement id or a box with non-positive size.

• convert_subtitlesConvert subtitles between SRT and WebVTTread-only

  Convert subtitle text between SubRip (srt) and WebVTT (vtt), optionally shifting every cue by shiftMs, and return the converted text with the detected source format, cue count, parse warnings (with line numbers) and timing issues (overlapping, zero-length or out-of-order cues). Pass the file contents, not a path. Malformed blocks are skipped with a warning instead of failing the whole file. ASS/SSA input is not supported here; the @prismposter/creator-tools package converts it. Errors when no cue could be parsed, the input is over 2 MB, or the shift is beyond one hour.

• estimate_tempoEstimate tempo, delay times and bar lengthsread-only

  Tempo arithmetic for editing to music: pass tap timestamps (ms) to estimate BPM with a stability and confidence rating, or pass a known bpm. Either way it returns the beat length, a delay table (straight, dotted and triplet ms for each note value) and how many seconds a number of bars lasts in a time signature. It works on numbers you supply and does not analyse audio. Errors when neither input is given, the taps do not yield a tempo, bpm is outside 30-300, or the time signature is not one listed.

• estimate_video_bitrateEstimate video file size and bitrateread-only

  Video size and bitrate arithmetic for a clip of durationSec. Pass videoKbps to get the encoded file size (MB, GB, MiB, GiB); pass targetCapMb to get the highest video bitrate that fits that file size. Audio is added at audioKbps (default 192). Every answer also gives the highest video bitrate that fits Discord's 20 MB free upload limit. Kbps is decimal (1 kbps = 1000 bit/s) and MB is 1,000,000 bytes. Use it to plan an export or hit an upload cap; it does not inspect or encode files. Errors when neither videoKbps nor targetCapMb is given.

• get_social_media_placementGet one social media placement specread-only

  Look up one social media placement by id and return its frame size, aspect ratio, first-party safe-area insets in px, usable box, and the official page the figures came from. Pass sourceWidth and sourceHeight together to also get the centre-crop and letterbox plan that fits your footage to this placement. Use this when you know the target placement; use list_social_media_placements to browse or compare, check_safe_area to test whether an element is clear of the platform UI, and calculate_aspect_ratio for a ratio that is not a platform placement. For TikTok the insets are null with a reason, be…

• list_social_media_placementsList social media placement specsread-only

  List every supported social media placement (or one platform's) with frame size, aspect ratio, safe-area insets in px, usable box and first-party source URL, plus links to the same dataset as CSV, JSON and its DOI. Use this to browse, compare platforms, or find a placement id; use get_social_media_placement when you already know the id and also need a crop/letterbox plan for your footage. The list is a fixed dataset returned whole, with no paging.

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Last commit

Oct 23, 2026 (8 days ago)

Last release

Oct 23, 2026 (8 days ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name

com.prismposter/creator-tools

Version

0.5.0

Auth

Auth not stated

Packages

npm @prismposter/creator-tools

License

MIT

Repository

github.com/PrismPoster/creator-tools

Website

www.prismposter.com/tools

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registrygithub-graphql