> ## 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.

# GET /v1/filings/diff

> Filing comparison endpoint (currently unavailable)

Filing comparison endpoint (currently unavailable)

<Info>
  Audience: application and coding agent.
</Info>

## Coverage and source scope

This endpoint is currently unavailable and returns `404 filings_intelligence_not_available`. When available, it will compare a selected issuer filing with a prior-period or explicitly chosen counterpart and return section-level change information. Any comparison is a review aid based on rendered filing text, not a determination of materiality or legal significance.

## Current availability

This endpoint currently returns `404 filings_intelligence_not_available`. It is documented here so clients can prepare for the contract, but it is not available for active filing comparison. When it becomes available, treat its rendered-text comparison as a review aid and open the cited filings before relying on a change.

## Canonical metadata

* `requestId`
* `traceparent`
* `code`
* `message`
* `details`

## Example request

<RequestExample>
  ```bash theme={null}
  curl -X GET \
    -H "x-api-key: $SECAPI_API_KEY" \
    -H "secapi-version: 2026-03-19" \
    "https://api.secapi.ai/v1/filings/diff?ticker=AAPL&form=10-K"
  ```
</RequestExample>

## 404 response

<ResponseExample>
  ```json theme={null}
  {
    "object": "error",
    "id": "err_example",
    "code": "filings_intelligence_not_available",
    "type": "invalid_request_error",
    "message": "The filings-intelligence plane is not enabled.",
    "requestId": "req_2ZK8Q1W9F4M6P7R3",
    "details": {}
  }
  ```
</ResponseExample>

## Give this prompt to your agent

<Prompt>
  GET /v1/filings/diff is currently unavailable and returns `404 filings_intelligence_not_available`. Do not use it as an active comparison dependency. When it becomes available, provide a ticker and form, preserve the selected filing citations, and treat its rendered-text comparison as a review aid rather than a materiality conclusion.
</Prompt>

## Failure posture

* treat `404 filings_intelligence_not_available` as the current endpoint state, not an empty result
* do not retry this endpoint as an active dependency until filings intelligence is enabled
* preserve `requestId` and `traceparent` in logs and downstream reports