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title: Upload an API Specification Created Outside of API Designer
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# Upload an API Specification Created Outside of API Designer

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

You cannot publish an API specification to Anypoint Exchange without going through API Designer. If
you want to publish a specification that you have already authored outside of API Designer, you must
create an API-specification project in API Designer, import your specification, and then publish to
Anypoint Exchange.

> [!WARNING] File uploads are restricted to supported formats.

## Before You Begin

Within Anypoint Platform, your user ID must be assigned the Design Center Developer permission.

## Procedure

1.  Open Design Center from the homepage of Anypoint Platform.

2.  Create an API-specification project that you can work in.

    1.  On the **Projects** page in Design Center, click **Create** and then click **New API
        Specification**.

    2.  In the **New API Specification** dialog, name your project. You can change the name later,
        if you want to.

    3.  Select **I’m comfortable designing it on my own**.

    4.  In the **Specification Language** field, select the language in which your API specification
        is written.

    5.  Click **Create API**. + **Result**: Design Center creates an API-specification project. In
        that project are two files:

        - A default, blank specification that has the same name as the project.

          You can delete this file in a later step. Currently, it is set as the root file of the
          project, and it is not possible to delete a file that is set as the root file.

        - A file named `exchange.json` that includes metadata that is required for Anypoint
          Exchange.

          This file is read-only.

3.  Import your API specification.

    1.  Click the gear icon in the top-right corner of the text editor and select **Import**.

    2.  In the **Import** dialog, select **File or Zip**.

    3.  Browse to your file or ZIP file and select it. + **Result:** The file or files are listed in
        the left pane of the editor. If you imported a ZIP file that contains files that are in a
        folder structure, the folder structure is represented in the pane.

4.  Set the root file of the project by right-clicking the specification and selecting **Set as root
    file**.

5.  Delete the blank specification that API Designer created by default.

## What To Do Next

Publish the API-specification project to Anypoint Exchange. See
[Publish an API Specification](https://docs.mulesoft.com/design-center/design-publish).

## See Also

[Anypoint Exchange](https://docs.mulesoft.com/exchange/)