01
Connect Medux MCP to Codex
Add the Medux remote MCP endpoint to Codex, provide an authorized credential, and confirm that the medux_animate_head_swap tool is available.
Codex MCP tutorial · edit
How to create a video head swap with Codex MCP and Medux
Use Codex and Medux through MCP to animate a prepared swapped-head image with a driving video. This guide covers input preparation, the approval gate, task monitoring, and a concrete output check.
POST/api/app/v1/process/video/animate_head_swap
Animate a swapped face image with a driving video to produce a head swap video.
Open the Video Head Swap API reference →Codex-specific workflow
Run AI Video Head Swap as a Codex MCP task
Use the active workspace as the source of truth. Ask Codex to identify the prepared swapped-head image and driving video, with each role clearly assigned, select medux_animate_head_swap, 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_animate_head_swap through Medux MCP to create a video head swap.
First inspect and identify the prepared swapped-head image and driving video, with each role clearly assigned.
Show me the exact tool arguments before execution.
After the task completes, return the animated head-swap video and verify that the output follows the driving motion and retains the intended full-head replacement.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 animated head-swap video. The final check is explicit: confirm that the output follows the driving motion and retains the intended full-head replacement.
Capability boundary: This page targets video head swap: it animates a prepared swapped-head image with a driving video. It is distinct from still-image head swap and from image face swap, so those keywords and workflows are documented separately.
What this tutorial does
Medux operation
Animate a swapped face image with a driving video to produce a head swap video.
Agent workflow
Codex selects medux_animate_head_swap, presents the arguments for review, calls Medux, and reports the response.
Before you start
Authentication
- Authentication is required via Authorization header.
Preconditions
- Upload the source file and create a file reference before calling this endpoint.
- Successful requests return a Medux task record immediately. Use the task query or sync endpoints to track completion.
- All file inputs must be uploaded and persisted as file references before submission.
Prompt Codex
Start with a clear instruction that names the Medux operation and the intended inputs.
Animate a swapped face image with a driving video to produce a head swap video.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 |
|---|---|---|---|
face_image_file_id | string | Required | Face reference image file id used for the head swap target. |
input_video_file_id | string | Required | Driving video file id. |
width | integer | Optional | Target output width. Default: 480. |
height | integer | Optional | Target output height. Default: 832. |
positive_prompt | string | Optional | Positive prompt text for the animation workflow. Default: 一个角色在说话. |
negative_prompt | string | Optional | Negative prompt text. |
edit_prompt | string | Optional | Edit instruction for preserving the swapped face identity. Default: 人脸保持不变. |
model_id | string | Optional | Animate head swap model id. Default: animate-head-swap-default. |
title | string | Optional | Optional task title. |
Step-by-step workflow
02
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.
03
Ask Codex to run Video Head Swap
Use one direct instruction with the intended values. Codex should select the Medux tool and show the proposed arguments before execution.
04
Review and approve the tool call
Check that the tool is medux_animate_head_swap and that each file ID, task ID, option, and output setting matches your request before approving it.
05
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_animate_head_swap
↓
Review inputs and approve the tool call
↓
Medux runs Video Head Swap
↓
Codex reports the response and outputFrequently asked questions
Can Codex use the Medux Video Head Swap API through MCP?
Codex can call the medux_animate_head_swap Medux MCP tool to animate a swapped face image with a driving video to produce a head swap video. 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_animate_head_swap. Review its arguments before approval and consult the API reference for the current contract.