# Finalise a media upload with the PostEverywhere API

**Source:** https://posteverywhere.ai/docs/api/complete-media-upload

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[🤖Connect ChatGPT, Claude or any AI agent to manage your social media end to endConnect your AI agent to manage your social media](https://posteverywhere.ai/agents)POST/media/{id}/complete

# Finalise a media upload with the PostEverywhere API

Call after uploading the file to the presigned `upload_url`. Verifies
the file actually exists (`400 file_not_uploaded` when it does not)
and that its magic bytes match the declared content type
(`400 file_type_mismatch` — the media is then marked failed). Videos
get a thumbnail generated in the background. Idempotent: calling on
already-ready media returns 200. `400 upload_failed` when the media
was previously marked failed. No request body is required.

Guide: [Media requirements by platform](https://posteverywhere.ai/docs/media-requirements)

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## Parameters

idstringrequiredMedia UUID

## Responses

- 200Media finalized (or already ready)
- 400
- 401
- 402
- 403
- 404
- 429
- 500

## More in Media

- [List media](https://posteverywhere.ai/docs/api/list-media)
- [Upload media](https://posteverywhere.ai/docs/api/init-media-upload)
- [Import from URL](https://posteverywhere.ai/docs/api/upload-media-from-url)
- [Get media](https://posteverywhere.ai/docs/api/get-media)
- [Delete media](https://posteverywhere.ai/docs/api/delete-media)
[← Delete media](https://posteverywhere.ai/docs/api/delete-media)[← All endpoints](https://posteverywhere.ai/docs/api/reference)