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chatgpt-apps

chatgpt-apps is a skill for Claude Code, Codex from dinglebear-ai/dendrite. It costs 96 tokens per session (4,183 once invoked), scanned A, original, AGPL-3.0.

A guide for building ChatGPT Apps SDK applications that combine an MCP server with an interactive widget. MCP is a standard way for an AI application to call tools and exchange structured data.

In plain words
What is it for?
Use it to design, scaffold, refactor, or troubleshoot ChatGPT apps, including their tools, widgets, UI resources, metadata, security settings, and domain configuration.
Why use it?
It helps when an app needs its server-side tools and ChatGPT user interface to work together correctly. It covers the integration details that connect those parts.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the upstream-skills plugin — 11 skills shipped together

not rated 1repo 1mo ago A scan 96 tokens AGPL-3.0

Good fit Use it to design, scaffold, refactor, or troubleshoot ChatGPT apps, including their tools, widgets, UI resources, metadata, security settings, and domain configuration.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dinglebear-ai/dendrite/chatgpt-apps
View source ↗ dinglebear-ai/dendrite
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add dinglebear-ai/dendrite --skill chatgpt-apps
Clone the repo
git clone --depth 1 https://github.com/dinglebear-ai/dendrite

Made for: Claude Code, Codex.

Or install upstream-skills, the plugin that ships this one along with the rest of its 11 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for chatgpt-apps

README.md
[![agentmods](https://agentmods.dev/badge/skills/dinglebear-ai/dendrite/chatgpt-apps/github.svg)](https://agentmods.dev/skills/dinglebear-ai/dendrite/chatgpt-apps)
Your own site
<a href="https://agentmods.dev/skills/dinglebear-ai/dendrite/chatgpt-apps"><img src="https://agentmods.dev/badge/skills/dinglebear-ai/dendrite/chatgpt-apps/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for chatgpt-apps

Your own site · 80×15
<a href="https://agentmods.dev/skills/dinglebear-ai/dendrite/chatgpt-apps"><img src="https://agentmods.dev/badge/skills/dinglebear-ai/dendrite/chatgpt-apps.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,183 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00096 $0.04183
Opus 5.5 $0.00038 $0.01673
Sonnet 5.5 $0.00019 $0.00837
Haiku 4.5 $0.00010 $0.00418

Measured 2mo ago against content hash c3a13a659ce2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

chatgpt-apps scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/scaffold_node_ext_apps.mjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/upstream-skills/skills/chatgpt-apps/SKILL.md · 321 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 321 lines · 96 tokens per session scan A c3a13a659ce2

Subscribe to this mod's changes

chatgpt-apps is a skill published in the GitHub repository dinglebear-ai/dendrite (1 stars, last pushed 1mo ago), licensed AGPL-3.0. It adds 96 tokens to every session and 4,183 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Backend and APIsBuilding agentsClaude Codeagent-skillsai-agentsclaudecodexgemini-cli
Related

chatgpt-apps compared with skills from other repositories

chatgpt-apps next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
chatgpt-appsdinglebear-ai/dendriteSkill11mo agoAGPL-3.0A96Claude Code, Codex
agents-sdkfcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A19Claude Code
supabase-clifcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A60Claude Code
supabase-jsfcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A64Claude Code
durable-objectsfcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A22Claude Code
spec-kitty-orchestrator-api-operatorPriivacy-ai/spec-kittySkill1.7k19d agoMITA125Claude Code, Codex
app-authfcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A83Claude Code