How do I run Create a Medux Asset with Codex MCP?

Codex can use medux_create_asset through Medux MCP to create an asset record from a file uploaded through a direct upload URL. The workflow identifies the exact inputs, reviews the tool arguments, monitors processing, and verifies the returned result.

Codex MCP tutorial · infra

How to create a Medux asset with Codex MCP and Medux

Q: Which MCP tool does this tutorial use?

This workflow uses medux_create_asset . Review its arguments before approval and consult the API reference for the current contract.

Use Codex and Medux through MCP to create an asset record from a file uploaded through a direct upload URL. This guide covers input preparation, the approval gate, task monitoring, and a concrete output check.

POST/api/app/v1/assets

Create an asset record from a file that was uploaded through a direct upload URL.

Open the Create Asset API reference →

Codex-specific workflow

Run Create a Medux Asset as a Codex MCP task

Use the active workspace as the source of truth. Ask Codex to identify the uploaded file reference, asset type, and asset metadata, select medux_create_asset, and keep the Medux task ID and returned output with the rest of the project. Naming the input roles and the expected result prevents an agent from guessing which file should be used where.

Codex prompt pattern

In this workspace, use medux_create_asset through Medux MCP to create a Medux asset.
First inspect and identify the uploaded file reference, asset type, and asset metadata.
Show me the exact tool arguments before execution.
After the task completes, return the new Medux asset record and verify that the asset points to the intended uploaded file and has the correct type and metadata.

Approval gate

Before approving the call, compare the selected tool, file or asset IDs, ordering, timing, and output settings with the request. If a local filename was mapped to an uploaded Medux file ID, keep that mapping visible so it can be audited later.

Result verification

Let Codex monitor an asynchronous task until it reaches a terminal state, then save or report the new Medux asset record. The final check is explicit: confirm that the asset points to the intended uploaded file and has the correct type and metadata.

What this tutorial does

Medux operation

Create an asset record from a file that was uploaded through a direct upload URL.

Agent workflow

Codex selects medux_create_asset, presents the arguments for review, calls Medux, and reports the response.

Before you start

Authentication

Authentication is required via Authorization header.

Preconditions

Requires reusable asset metadata.
Uploaded MEDIA files use file id directly and do not need this endpoint.

Prompt Codex

Start with a clear instruction that names the Medux operation and the intended inputs.

Use Medux to run Create Asset. Review the required inputs, call medux_create_asset, wait for the result if a task is returned, and report the output clearly.

Request fields to review

Confirm these values before approving the MCP tool call. The linked API page remains the source of truth for current limits and response semantics.

Field	Type	Requirement	Purpose
`category`	string	Optional	Asset category, used for validation and later rendering. Allowed values: - CATEGORY UNDEFINED - Not specified. - MEDIA - Uploaded source media. - AVATAR - Reusable avatar asset. - VOICE - Reusable voice asset.
`file_size_bytes`	int64	Optional	Original file size, in bytes.
`name`	string	Optional	Display name provided by the user. This value may be empty.
`storage_object.key`	string	Optional	Provide the value described in the API reference.
`storage_object.url`	string	Optional	Provide the value described in the API reference.

Step-by-step workflow

Connect Medux MCP to Codex

Add the Medux remote MCP endpoint to Codex, provide an authorized credential, and confirm that the medux_create_asset tool is available.

Prepare the required inputs

Prepare the source files, asset IDs, text, or settings required by the operation. Upload local media first when the tool requests file IDs.

Ask Codex to run Create Asset

Use one direct instruction with the intended values. Codex should select the Medux tool and show the proposed arguments before execution.

Review and approve the tool call

Check that the tool is medux_create_asset and that each file ID, task ID, option, and output setting matches your request before approving it.

Check the Medux response

If Medux returns an asynchronous task, let the agent monitor it until completion; otherwise review the immediate response and save any result identifiers or output URLs.

Workflow recap

User goal
  ↓
Codex selects medux_create_asset
  ↓
Review inputs and approve the tool call
  ↓
Medux runs Create Asset
  ↓
Codex reports the response and output

Frequently asked questions

Can Codex use the Medux Create Asset API through MCP?

Codex can call the medux_create_asset Medux MCP tool to create an asset record from a file that was uploaded through a direct upload URL. This guide covers the required inputs, approval flow, result handling, and the matching API reference.

Which MCP tool does this tutorial use?

This workflow uses medux_create_asset. Review its arguments before approval and consult the API reference for the current contract.