Home/Tools/Apps SDK Manifest Validator

Apps SDK Manifest Validator
ChatGPT Apps manifest checker

Validate ChatGPT Apps and MCP app metadata for OAuth, widget, CSP, and tool result mistakes.

Input / 输入

Output / 输出

Paste input and run the checker.

Apps SDK Manifest Validator use cases

Use this local checker before debugging ChatGPT Developer Mode, OAuth flows, output templates, or widget bridge calls.

Scope and privacy

The checker runs locally in this browser and does not upload the pasted input. Remove secrets before pasting. Results are static evidence from the supplied text, not proof of live server behavior, security, compatibility, or approval.

Verification workflow

  1. Use a redacted, minimal failing example.
  2. Fix definite syntax or metadata errors first.
  3. Test the real endpoint with official inspectors and representative tasks.
  4. Add a regression test before publishing.

Related wiki

Primary references