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>log in to commentHi, I'm Angelo, the maker. AI-labelling laws now ask apps to mark what they generate. In the EU, AI systems already on the market have until 2 December; California, South Korea and India have their own rules. Kennmarq.com marks a file in one call (an invisible watermark plus signed, time-stamped C2PA Content Credentials) and reads the marks back before returning it. Try it without an account: drop any picture on kennmarq.com/check, or look up your country on the map. A free key gives 1,000 marks a month. Not yet: text and 3D, and C2PA readers show our signature as from an unknown signer until our C2PA conformance application (we applied on 5 November) is accepted. What would you need to trust a service like this with your outputs?
More API tools →74 free dev tools →
- One API call marks AI content for every market you serve
- Invisible TrustMark watermark survives resizing and compression
- Signed C2PA Content Credentials with time‑stamp
- Plain AI label added to XMP metadata
- Free API key, no credit card required
Kennmarq provides an API that adds invisible watermarks, signed C2PA credentials, and AI labels to images, video, and audio to meet global AI-labelling laws.
- for
- Developers building AI-generated media platforms that need compliance labeling.
- pricing
- freemium
Key features
- Invisible watermark — Adds TrustMark, Video Seal or AudioSeal hidden in the file that survives compression and resizing.
- Signed Content Credentials — Creates a C2PA manifest with company, model and app info, signed and time-stamped.
- Plain AI label — Adds IPTC DigitalSourceType metadata that major platforms read for AI labeling.
- Safety check — Screens images for sexual content or realistic faces before marking, with allow/flag/block options.
- Public checker — Anyone can verify marks in the browser without uploading files.
- SDKs & integrations — REST API plus JavaScript, Python SDKs, ComfyUI nodes and Vercel middleware.
Use cases
- Mark every AI-generated image before publishing to comply with EU AI Act.
- Add provenance to AI-created videos for platforms that require watermarks and C2PA credentials.
- Provide a public verification page for users to confirm AI labeling of uploaded media.
Kennmarq.com pricing
- Free$01,000 marks/month · 1 GB data returned · 10 API calls/minute
- Indie$9/month20,000 marks/month · 20 GB data · 60 API calls/minute
- Startup$39/month150,000 marks/month · 150 GB data · 300 API calls/minute
- Scale$149/month1,000,000 marks/month · 500 GB data · 1,000 API calls/minute
- Enterprisefrom USD 990/monthCustom volume · Single sign-on & SCIM · Private deployment
Kennmarq.com vs alternatives
 Kennmarq.com |  Replicate |  Postman |  Vonage |  Algolia | |
|---|---|---|---|---|---|
| Best for | One-call AI content provenance | AI model inference API | API testing tool | SMS/voice/video communications | Search and discovery |
| Pricing | Freemium | Subscription | Subscription | Subscription | Subscription |
| DevHunt upvotes | 1 | 0 | 0 | 0 | 0 |
| Launched | Nov 2026 | — | — | — | — |
- Kennmarq.com vs Replicate: Replicate runs AI models; Kennmarq adds provenance marks to media files.
- Kennmarq.com vs Postman: Postman is an API client; Kennmarq is a production API for content labeling.
- Kennmarq.com vs Vonage: Vonage provides communications APIs, not media provenance labeling.
- Kennmarq.com vs Algolia: Algolia offers search APIs, unrelated to AI content labeling.
Kennmarq.com FAQ
What is included in the free tier?+
All features are available up to 1,000 marks a month, 1 GB data returned and 10 API calls per minute, with no credit card required.
How does the API handle exceeding the quota?+
On free and annual plans the API returns a 402 error until the next month; paid plans can use extra marks at $0.0003 each.
Do I need my own C2PA certificate?+
No, Kennmarq signs with its own certificate chain; Enterprise customers can use their own signing identity.
Can I run the watermarking locally?+
Yes, the Python SDK can generate the watermark and manifest locally, sending only the small manifest for signing.
Where is my data stored?+
Customer data is processed in memory and stored in AWS Zurich; logs and signing keys stay in AWS KMS in Switzerland/EU.
Summarized by DevHunt from kennmarq.com · Nov 6, 2026. Details may change; check the official site.
