ChatGPT Plugin

MijnSpel

Build and playtest games

Brand: MijnSpel

Category: Consumer & Lifestyle
Primary Subcategory: Hobby Reference & Maker Tools

Integration details

Description

MijnSpel helps board game designers create and refine playable prototypes in Creator or Studio, validate project files, preview gameplay, run balance simulations, compare results, and publish a confirmed project to the web.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Consumer & Lifestyle
Primary Subcategory: Hobby Reference & Maker Tools
Secondary Subcategories: None listed
Brand: MijnSpel
Access: Account required
First tracked: 2026-09-13
Tool count: 25
Geography: US

Agent DiscoverabilityChatGPT Plugin Discovery Score

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ChatGPT now suggests Plugins on its own when they match a user's request.Your Plugin Discovery Score measures how often yours appears, and it will show here as soon as it’s ready.

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Primary Subcategory

Competing in ChatGPT Hobby Reference & Maker Tools

View Category

Listed in alphabetical order

Primary Subcategory

3D Printer on DemandComing soonGet notified

A-Z Dog BreedsComing soonGet notified

AI MuseumComing soonGet notified

Angler Adventures: Lure GuideComing soonGet notified

ApexLogComing soonGet notified

MijnSpelComing soonGet notified

Tools

25 tools agents can invoke

Submit the user's answer from the Codex or ChatGPT conversation. Stable option ids are authoritative; the first accepted answer wins.
Stable compatibility entry point for current MijnSpel operations. First call operation=discover_operations to obtain the live operation names and argument schemas, then invoke any returned non-UI operation without depending on a refreshed static tool snapshot. Prefer the direct present_question tool when showing its interactive UI.
Release an active external work lease without applying files or advancing a Creator phase. Always call this after post-apply inspection, simulation, or result reading, and whenever an opened project will not be finished with finish_work.
Read and compare two or more stored simulation runs in request order so rule-change effects can be assessed.
Create a new project in Creator or Studio.
Delete one approved project file when its expected content hash still matches.
Finish the current Creator phase or apply the validated Studio proposal, then release the lease.
Read a durable project question and its accepted answer after reconnecting or after the user answers in MijnSpel.
Read one stored simulation run's complete Markdown report and structured result by run id.
List Creator design revisions, oldest first, with stable labels and the current revision marked. Creator only.
List the Creator design-system catalog: each system's name, description, and when to use or avoid it. Creator only.
List the MCP-visible text files for an opened project.
List projects owned by the signed-in user in one MijnSpel product.
List every stored simulation run for an opened project, newest first, including version and summary metadata.
Open an owned project, return product-specific context (including Creator's self-contained current phase contract), and acquire a short external work lease. Set replace_existing_lease only to recover a lease lost by another agent session for the same account; this invalidates that session's lease.
Validate publish preconditions and mint a short-lived single-use publish confirmation token.
Present one durable project-level question in MijnSpel before asking the same question in the Codex or ChatGPT conversation. Use this for every project question. Visual choices require a self-contained HTML preview on every substantive option.
Prepare and return the real authenticated product preview URL.
Consume a publish confirmation token and publish the current project revision to the public web.
Read one approved UTF-8 project file and return its content hash.
Restore a Creator design revision by stable label. This permanently removes every newer design revision and therefore requires explicit destructive confirmation. Creator only.
Validate the current simulation contract and, when ready, prepare a version-pinned real browser simulation run. Returns actionable structured detail when not ready; otherwise returns a URL and run id for the configured run.
Adopt one catalog design system in the Creator design_pick phase. The server copies the bundle to .context/design-system/, its tokens, fonts, icons, and styles into .context/design-pick/approved-mock/, and its fonts and icons into build/assets/. Existing files at those paths are replaced. Creator only.
Run the fixed validation workflow for the current Creator build or Studio proposal.
Atomically replace one approved UTF-8 project file when its expected content hash still matches.

FAQs

MijnSpel ChatGPT Plugin FAQ

How the directory, categories and Discoverability Score work.

Read the methodology

How do I improve MijnSpel's ChatGPT Plugin discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are MijnSpel alternatives on ChatGPT?

As of 2026-10-26, MijnSpel competes with 3D Printer on Demand, A-Z Dog Breeds, AI Museum, Angler Adventures: Lure Guide, ApexLog, Archivist AI, Atlarium Habitat Database MCP, Bardkeeper and 31 more in ChatGPT Hobby Reference & Maker Tools, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.