coco-research/coco · skills/openai-apps-mcp/SKILL.md

OpenAI Apps MCP skillB

OpenAI Apps MCP is agent-read markdown (skill) from coco-research/coco: Build ChatGPT apps with MCP servers on Cloudflare Workers. Extend ChatGPT with custom tools and interactive widgets (HTML/JS UI). Use when: developing ChatGPT extensions, implementing MCP servers, or troubleshooting CORS, widget 404s, MIME types, ASSETS binding errors, Next.js integration issues, or edge platform limitations..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add coco-research/coco/OpenAI Apps MCP@git:20260802.1479e32
Exact content
mdr add coco-research/coco/OpenAI Apps MCP@sha256:5d83efa87c6472c8

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_7dophjelcpwvdqie.svg)](https://markdownregistry.com/a/art_7dophjelcpwvdqie)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260802.1479e32 latest2026-08-02 1479e32 18,053 BB view · diff
git:20260426.d53cc6c2026-04-26 d53cc6c 18,033 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (18053 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address

Source

GitHub

coco-research/coco · 280 stars · license NOASSERTION · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_7dophjelcpwvdqie
GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/OpenAI Apps MCP
GET https://markdownregistry.com/api/v1/blob/5d83efa87c6472c877d2e14b5fbe9a6eee8dc242fb2db7a63f8a4b86a5c8c58b

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.