GPT Market · Help Center

Help Center

Find answers to common questions about schema validation, API key management, OAuth configuration, and getting started with GPT Market.

Getting Started

New to GPT Market? Start here.

5 articles

Schema Validation

Fix OpenAPI schema errors before importing into OpenAI.

9 articles

API Key Management

Store, rotate, and secure your API credentials.

8 articles

OAuth & Authentication

Configure OAuth flows for your Custom GPT Actions.

5 articles

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Help Center

Getting Started

What is GPT Market and what can I do with it?

How do I sign in?

Which browsers are supported?

How do I add my first Custom GPT Action?

Is GPT Market affiliated with OpenAI?

Schema Validation

"In components section, schemas subsection is not an object" — how do I fix this?

What does "operationId contains invalid characters" mean?

Why does OpenAI say my schema is not valid OpenAPI 3.1.0?

The schema imports without errors but the action doesn't work — why?

Can I have multiple operations (paths) in one schema?

What is the maximum size for a schema?

Why does the validator reject an empty string for info.title?

How do I validate a schema I wrote manually?

"Action sets cannot have duplicate domains" — I have multiple Hugging Face models, what do I do?

API Key Management

How does GPT Market store my API keys?

Should I store my production API key in GPT Market?

How do I rotate or update an API key?

What authentication types are supported?

Can I delete a stored API key?

What happens if my API key is compromised?

Does GPT Market support Hugging Face API tokens?

How do I use OAuth instead of a static API key?

OAuth & Authentication

What is the difference between API Key auth and OAuth in a GPT Action?

Which OAuth grant type does OpenAI support?

What redirect URI should I register with my OAuth provider?

Why does the OAuth flow fail with "invalid_client"?

Can I test my OAuth flow before publishing my GPT?

Still need help?