What is Apps SDK?
Build apps that run inside ChatGPT, on MCP.
Who is Apps SDK best for?
Apps SDK is best for companies and developers who want their service to work inside ChatGPT and Codex through an MCP server.
Services that want a place in ChatGPT
An MCP server exposes your service's tools, handles user sign-in and returns results that ChatGPT can act on in a conversation.
Interactive results in chat
Optional UI built on the open MCP Apps standard shows things people need to compare, edit or confirm, such as a product comparison, a schedule or a map.
Shops selling physical goods
A plugin can take orders for physical goods through your own checkout, and select marketplace partners can use a payment sheet inside ChatGPT, which is in beta.
Reaching ChatGPT and Codex at once
ChatGPT and Codex share one plugin directory, so a public plugin is published once and can be found from both.
How much does Apps SDK cost?
Apps SDK has no published price: OpenAI's developer docs, which now cover it under the name Plugins, list no fee to build, test or publish, and a public listing needs a verified developer or business identity.
OpenAI shows no pricing page and no fees for building plugins: you test one in ChatGPT's developer mode, which depends on account and workspace policy, and submit it for review through the OpenAI Platform. Plugins may not sell subscriptions, credits or other digital goods inside ChatGPT, or add fees that apply only in ChatGPT. Plans and current prices are on developers.openai.com.
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What are the best Apps SDK alternatives?
One tool on Recaply does Apps SDK's job. It is open source, so you can run it on your own server.
Questions about Apps SDK
What is Apps SDK?
Build apps that run inside ChatGPT, on MCP.
Who is Apps SDK for?
Apps SDK is best for companies and developers who want their service to work inside ChatGPT and Codex through an MCP server.
Is Apps SDK free?
Yes. Apps SDK has a free plan.
Is there an open source alternative to Apps SDK?
Yes. MCP Apps is an open source tool that does the same job, so you can run your own.
What are the best Apps SDK alternatives?
The closest alternatives on Recaply are MCP Apps.
Where can I try Apps SDK?
On its official website, openai.com.
Is Apps SDK the same as ChatGPT plugins?
In OpenAI's current docs, yes. The Apps SDK docs address now leads to the Plugins docs, and OpenAI says approved Apps SDK integrations can be shipped as plugins that work in ChatGPT and Codex. The interface layer lives on as Plugin UI, built on the MCP Apps standard.
Can I sell subscriptions through an Apps SDK app?
No. Apps built with Apps SDK, now called plugins, may sell only physical goods. Users can sign in to a paid account they already have, but a plugin cannot show plans, start a subscription or push upgrades, and it must not add fees that apply only in ChatGPT.
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