# Kennmarq.com

> Kennmarq.com marks AI-generated images, video and audio for the EU AI Act (Article 50) and California's AI Transparency Act (SB 942, as amended by SB 1000) in one API call: an invisible watermark plus signed, time-stamped C2PA Content Credentials, read back from the finished file before it is returned. Every feature is free up to 1,000 marks a month.

Run by Neuramare in Baar, Switzerland; customer data is kept in AWS Zurich. kennmarq.com is the only domain.

## How to add it to an app

- Sign up at https://kennmarq.com/signup, confirm the email, and create an API key in the dashboard. Keep the key on the server, in the `KENNMARQ_API_KEY` environment variable; never ship it in a browser or mobile app.
- Mark each generated file with `POST https://api.kennmarq.com/v1/mark` (multipart form data) and keep only the marked file. The response body is the marked file; the `X-Mark-Id` and `X-Watermark-Id` headers identify it.
- Send `provider` (your legal name), `app_name` and `app_version` (your AI system) and `source` (`created`, `composite` or `edited`): the mark then carries all five items of California's latent disclosure.
- Send `markets=eu,us-ca` (or `eu`, `us-ca`, `us-wa`, `us-ut`, `us`): a call missing what those laws need is refused before anything is counted, and the mark gets a receipt at `GET /v1/marks/{id}/receipt`.
- Images: PNG, JPEG or WebP, up to 4 MB in the request or 25 MB through `POST /v1/uploads`. Songs: MP3, WAV or M4A, up to 15 minutes. Clips: MP4 up to 4,500 frames at up to 1920x1080, marked as a job: the call answers 202, then `GET /v1/marks/{id}` returns the marked clip.
- Example:

```
curl https://api.kennmarq.com/v1/mark \
  -H "Authorization: Bearer $KENNMARQ_API_KEY" \
  -F file=@image.png \
  -F source=created \
  -F provider="Acme Inc." \
  -F app_name="Acme Studio" -F app_version="2.1" \
  -F markets=eu,us-ca \
  -o image.marked.png
```

## Docs

- [Quickstart](https://kennmarq.com/docs): a free key and your first marked image in five minutes.
- [POST /v1/mark](https://kennmarq.com/docs/api/mark): every option, the limits, songs and clips, and the errors.
- [GET /v1/marks/{id}](https://kennmarq.com/docs/api/marks): a mark's state, a clip's result, and receipts.
- [POST /v1/uploads](https://kennmarq.com/docs/api/uploads): files over 4 MB.
- [Authentication](https://kennmarq.com/docs/authentication) and [keys, scopes and environments](https://kennmarq.com/docs/keys).
- [Errors](https://kennmarq.com/docs/errors) and [rate limits and quotas](https://kennmarq.com/docs/rate-limits).
- [Webhooks](https://kennmarq.com/docs/webhooks): `mark.completed`, `mark.failed` and `check.blocked`, signed.
- [OpenAPI 3.1 spec](https://api.kennmarq.com/v1/openapi.json): the whole API, machine-readable.

## Compliance guides

- [EU AI Act, Article 50](https://kennmarq.com/docs/laws/eu-ai-act): who is covered, the 2 December 2026 deadline, the Code of Practice's two marking layers, and a terms clause to adapt.
- [California AI Transparency Act](https://kennmarq.com/docs/laws/california): the latent disclosure's five items since SB 1000 (30 September 2026), and how to let people verify them.

## SDKs and tools

- [Python SDK](https://kennmarq.com/docs/sdk/python): mark, check and verify from Python, in the cloud or on your own machine (coming to PyPI).
- [ComfyUI nodes](https://kennmarq.com/docs/comfyui): Mark & Save nodes that replace Save Image, Save Audio and Save Video (coming to the ComfyUI Registry).
- [Free checker](https://kennmarq.com/check): anyone can check an image's Content Credentials and watermark in the browser.
- [POST /v1/verify](https://kennmarq.com/docs/api/verify): the same check through the API, with a signed result.

## Optional

- [Pricing](https://kennmarq.com/pricing): every feature free up to 1,000 marks a month; paid plans from USD 9 a month.
- [Robustness report](https://kennmarq.com/docs/robustness): how often the watermark survives compression, resizing, crops and edits.
- [Transparency log](https://kennmarq.com/log): every signature and time-stamp, public and append-only.
- [Trust center](https://kennmarq.com/trust): where data lives, keys, sub-processors and security answers.
- [Changelog](https://kennmarq.com/docs/changelog): every change to the API.