"author:j-river" matching MCP servers:

Enables encoding Mermaid diagram source into reversible share tokens and links for an explicit destination, and decoding tokens, fragments, or share URLs back to their original source and optional config data. Runs as a local stdio tool that only serializes text, without rendering diagrams, validating syntax, or fetching URLs.

Enables local MCP clients to inspect decoded alpha samples from trusted local videos and analyze supplied alpha-channel pixel bytes, reporting transparency and visibility statistics. It only checks transparency — it does not remove backgrounds or convert media.

Enables MCP clients to inspect subtitle timing, convert SRT and WebVTT, shift timestamps, and extract transcripts from supplied subtitle text locally without API keys or network requests.

Builds structured diagram scenes from ordered nodes, edges and text, then validates their geometry, styles and connector references. Exports the result as native editable Draw.io XML nodes with attached connectors instead of a flattened screenshot.