Caido

Runtime ​

Match & Replace Rule Not Working ​

If your Match & Replace rule is not working, ensure you're looking at the un-prettified version of the request/response body by pressing the {} Prettify button within the request/response panes to ensure your spacing is correct. While the prettified format provides easier readability, it is not an accurate representation of JSON body data.

Can't Preview Responses ​

If you're unable to preview responses, you may encounter a rendering error, accompanied by a log error message entry similar to the following:

Rendering error: LaunchIo(Custom { kind: UnexpectedEof, error: "unexpected end of stream" }, BrowserStderr("[0101/110718.156035:ERROR:zygote_host_impl_linux.cc(90)] Running as root without --no-sandbox is not supported. See https://crbug.com/638180.\n"))

This error happens when Caido is running as root.

To fix it, you can either:

  1. Not run Caido as the root user.
  2. Remove the following flag when launching Caido:
  • --no-renderer-sandbox

Unable to Access 'Individual' Subscription Features ​

Caido caches the state of your account. Any changes to your account can take some time to update.

Refresh your account state by logging out/logging into your Caido instance.

The GraphQL Playground Doesn't Work ​

This might happen because you haven't added your Authorization header.

In GraphQL Playground, you can add an Authorization header as follows:

  1. Open GraphQL Playground in your browser.
  2. Locate the "HTTP HEADERS" pane on the bottom left side of the interface.
  3. Enter your Authorization header in the following format:
{
  "Authorization": "Bearer ACCESS_TOKEN_HERE"
}

To acquire your token:

  1. Right-click inside the Caido application.
  2. Select Inspect.
  3. Select the Application tab.
  4. Under Storage - Local storage within the left-hand side menu, select the listening address/port of Caido.
  5. Copy the value of the accessToken (within the value of the CAIDO_AUTHENTICATION key).

A Section of the UI is Missing ​

Caido allows you to resize parts of the UI. You might have accidentally minimized one of the sections.