AI Likeness Consent API: What It Is and How It Works

What an AI likeness consent API does, what a consent record contains, how an allow/deny check and signed grant work, and when manual is enough.

Royall publishes this guide. Descriptions of other companies come from their own public pages, accessed October 4, 2026.

Quick answer

An AI likeness consent API lets software ask, at the moment of use, whether a real person has authorized a specific use of their face or voice, and get back a yes or no plus evidence of the answer. It replaces a one-time checkbox or an old release with a check against the person's current rules. Low-volume products can do the same job manually with signed agreements; an API earns its place when checks are frequent or automated.

What is a likeness consent API, in plain terms?

It is a permission lookup. Your product sends three things: who (an identifier for the person or their recorded likeness), what (the intended use, such as a podcast ad or a game character), and sometimes how deep (inference only, generating new media, or training). The service checks the person's rules and returns allow or deny. On allow, many designs return a signed token you can store or embed as evidence.

What should a good consent record contain?

Whether you build it or buy it, a consent record should hold:

Field	Why
Person or authorized representative, and how identity was checked	Consent from the wrong person is worthless
The exact consent text they saw, with signature and date	So you can show what they agreed to
Allowed uses, by type	An audiobook is not an ad
Prohibited uses	Including uses refused for everyone
Training permission, separately	Training and output are different rights
Term, territory, exclusivity	Permissions expire and have borders
Version and revocation status	Rules change; the latest version wins for new uses
Evidence of each check	What was asked, what came back, when

If you're building in-house, this table is your schema. Our platform integration guide covers where checks sit in a generation pipeline.

How does a consent check work, step by step?

Identify the person or asset.
Describe the intended use and depth.
Ask the consent service.
Receive allow or deny. Treat deny as a valid answer, not an error.
On allow, store or embed the evidence.
Ask again at generation time and whenever the use changes, because permissions can be withdrawn.

Is a consent API the same as deepfake detection?

No. Consent asks: may this happen? It runs before generation. Detection asks: did this happen? It runs on content that already exists. Provenance asks: where did this file come from? It travels with the file, for example as C2PA Content Credentials. A responsible platform usually needs all three. Detection vendors are listed in our alternatives guide.

Why are developers adding consent checks now?

Some laws now reach tools, not just the people who post fakes. Status as of October 4, 2026:

Tennessee ELVIS Act (in effect July 1, 2024) creates liability for distributing technology whose primary purpose is producing a particular person's voice or likeness, if the distributor knows that use isn't authorized. General-purpose tools aren't the target. Pub. Ch. 588 · Tracker
NO FAKES Act (proposed, not law) would make it unlawful to distribute a product primarily designed to produce unauthorized replicas of specific people, and would require licenses to be written, signed and reasonably specific. S. 4591 awaits a Senate floor vote; H.R. 8915 is in committee. S. 4591 · Tracker
California SB 1111, effective January 1, 2027, confirms that commercial uses of a living person's digital replica need consent under Civil Code §3344. Tracker

Can I manage consent without an API?

Yes. Verify the person or representative, get specific written permission covering the fields in the table above, store the signed document, and re-check when the use changes. The weakness is scale: people have to read documents and confirm they're current each time. Our six-check permission guide is the manual version.

Where Royall Herald fits

Royall Herald is one implementation. Your app sends a Royall Asset ID and an intended use to POST /v1/authorize and gets back ALLOW or BLOCK. Both return HTTP 200. Royall describes no AI in the decision: it reads the person's choices and Royall's rules, including five categories refused for everyone (illegal uses, non-consensual intimate imagery, fraud and impersonation, defamation and harassment, political manipulation). Herald is live; Royall Connect, for consent onboarding, is in early access.

# Sandbox example from Royall's developer docs
curl -sX POST https://vault.royall.ai/v1/authorize \
  -H "Authorization: Bearer $ROYALL_HERALD_KEY" \
  -H "Content-Type: application/json" \
  -d '{"asset_code":"RYL-V-2026-SANDB0X0-N","use_case":"ads","depth":"synthesis"}'

What the grant does and doesn't prove, per the docs:

On ALLOW, Herald returns an Ed25519-signed grant binding the asset, tier, use, your company and a short expiry (about 15 minutes, at most 1 hour). You can embed it in output, for example as a C2PA assertion.
A passing verify() proves Royall issued the grant. Your verifier still needs to compare the asset, tier and use, and re-authorize at generation time.
BLOCK responses carry no grant.
AI training is never a blanket setting: the docs say training is approved per deal, and a creator can't self-offer it.

Pricing: Developer plan from $499 a month plus $0.08 to $0.15 per call; qualifying early-stage startups can apply to the Builders Program for 12 months free. Developer docs · Royall Herald

Key takeaways

A consent API answers "may this happen?" before generation.
The record matters more than the API: identity, exact text, scope, training, term, revocation, evidence.
Detection and provenance are separate layers.
Re-check at generation time; permissions change.
Manual clearance is still valid at low volume.

FAQ

Do I need a consent API? Not necessarily. A manual workflow may be enough for occasional, high-touch uses.

Can a consent API replace a contract? No. It operationalizes permissions. Contracts, safety policies and legal review are still needed.

What happens when someone withdraws consent? New checks should return deny. Existing material follows the governing agreement.

How long is a Royall grant valid? About 15 minutes by default and no more than an hour, per Royall's developer docs.

Sources

Related guides

This is general information, not legal advice.