"Open Collective" matching MCP connectors:

TCGdex MCP — multi-language open trading card game database (Pokémon TCG and more).

Publish browser games to Playfrog and get a shareable play link. Static HTML5, files sent inline.

OnlyWorldsA

com.onlyworlds

Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.

REG-VaultA

org.regvault.api

Open retro-gaming metadata catalog — 91,000 games, 99 systems. Box art, manuals, screenshots, gameplay previews. Free MCP + REST API.

OpenDota MCP — Dota 2 open stats.

Enter ScoreIA Open Labyrinth. Auth none. Sealed cards include failures. Not the Chamber.