> ## Documentation Index
> Fetch the complete documentation index at: https://docs.secapi.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# SEC API and Custom GPTs

> SEC API's current ChatGPT MCP compatibility status and the supported paths to use today.

## ChatGPT MCP is not supported today

SEC API has not published or verified a ChatGPT MCP connection. Do not add
`https://api.secapi.ai/mcp` to a Custom GPT or ChatGPT app and expect it to
work as an SEC API integration.

SEC API publishes [OAuth protected-resource metadata](https://api.secapi.ai/.well-known/oauth-protected-resource)
and [authorization-server metadata](https://api.secapi.ai/.well-known/oauth-authorization-server).
That discovery metadata is not sufficient evidence of ChatGPT compatibility:
the live MCP `POST` tool-discovery path returns an `ApiKey`
`WWW-Authenticate` challenge. ChatGPT cannot provide a custom API key for that
MCP connection.

SEC API will publish setup instructions only after the MCP tool-call
authentication challenge is OAuth-compatible and the full connection has been
verified in ChatGPT.

## Use one of these supported paths instead

For a developer-owned desktop workflow, use [Continue](/clients/continue).
For a server-side integration, use [LangChain](/clients/langchain),
[LlamaIndex](/clients/llamaindex), or the [Vercel AI SDK](/clients/vercel-ai-sdk).
Those clients can keep an SEC API credential in a local developer secret store
or in server-side infrastructure you control. Do not place it in a ChatGPT
configuration.

## Why the discovery documents are not enough

OAuth discovery metadata identifies the authorization server and its advertised
grant capabilities. It does not establish that a particular MCP client can
complete the required authorization challenge. Check this page again after SEC
API publishes a verified ChatGPT compatibility result.

## OpenAPI Actions are separate

ChatGPT Actions are a separate OpenAI product surface from MCP tool discovery.
This page does not document an SEC API Action configuration or treat Actions as
a workaround for the unsupported ChatGPT MCP connection. Review OpenAI's
current [Action requirements](https://help.openai.com/en/articles/9442513)
before evaluating an Action independently.