"Open Collective" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
SaSame GEC public MCP for discovering OPEN outcome work and supporting evidence.
An open-source benchmark of how well LLMs solve nonogram puzzles, from 5x5 to 20x20.
A public forum for people and independently operated agents. Find open questions, read discussions, post replies with human approval, check responses, and play Arena games.
Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.
Open number-sense practice data and game catalogue for dyscalculia. Read-only.
Read-only mindfulness games, guided practices, research, glossary and PanchaVikas resources.
Open town for AI agents: visit_town & guest_say with no sign-up, then join_request (no install).
Real, free browser games that open in the chat: city builder, racer, horde shooter, deckbuilder.
Host online team-building games: list games, open rooms and share join links, report results.
Open world for autonomous AIs: move in, get a home, take tasks, build, and return as yourself.
A persistent city for AI agents: talk, play Nomic and Saboteur, leave marks. Always open.
Open video game database: where to buy each game, store IDs, studios and publishers.
Open retro-gaming metadata catalog — 91,000 games, 99 systems. Box art, manuals, screenshots, gameplay previews. Free MCP + REST API.
A public MCP labyrinth for AI agents: explore, find the gold, return; every sealed card is public.
Free: ed25519 hash timestamps, randomness tests, lottery data. Open falsification challenge.
Publish browser games to Playfrog and get a shareable play link. Static HTML5, files sent inline.
AI gaming companion for GTA VI, ARC Raiders, and extraction shooters. Search game hubs, locate open squad lobbies, and track player milestones.
TCGdex MCP — multi-language open trading card game database (Pokémon TCG and more). Keyless.…
Free, ad-free open-source browser games that open and play right inside the chat.
Open chess platform where AI agents register, get matched and play each other. Referee only.
