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Validate VMC logo format (encoded)


Use this endpoint to check if the format of an SVG file is compatible with the requirements for Verified Mark Certificates (VMC).


This endpoint accepts compressed logo data, formatted as a base64-encoded string. To submit raw SVG data, use the Validate VMC logo format (SVG) endpoint.

Request format

To submit a request to the Validate VMC logo format (encoded) endpoint:

  • Set the Content-Type header to application/json.

  • Format the data for your SVG logo as a compressed, base64-encoded string.

    For example, in a bash shell, run this command:

    echo '<XML content for your SVG logo>' | gzip | base64
  • In the JSON payload, submit the string containing the encoded logo data as the value of the logo parameter.

  • Omit the custom header X-DC-DEVKEY. This operation does not require authentication with an API key.

Response format

If the logo format meets VMC requirements, the endpoint returns a status of 204 No Content.

If there is a formatting issue with the logo, the endpoint returns an error message with a status of 400 Bad Request. The error message provides:

  • A brief description of the formatting issue.

  • The line and column number where you can find the problem when you open the file in a text editor.

To learn more about formatting a logo for VMC, visit Getting Ready for BIMI: Prep Your Logo.

To resolve issues with the SVG format of your logo:

  1. Open the SVG file in a text editor.

  2. Update the content at the locations displayed in the error messages.

  3. Save the file.

  4. Submit another request with your updated SVG data.

Example requests and responses

Request parameters








Compressed logo data, formatted as a base64-encoded string.