Licence keys that answer from Stripe

Your plugin sends a key and the site it runs on. licencebook finds the Stripe subscription the key was made from and answers with what it pays for: the tier, the features, how many sites. The answer comes back signed, so your plugin keeps it for 24 hours and checks it with no network call. If we go down, nobody who paid gets switched off.

Check A Signed Answer

A real answer from tonight's seed run, for the AI Act Pro add-on on shop-one.example.com. Your browser checks its signature against our public key; nothing is sent to us.

The token, payload and signature split at the dot

Our public key 759f4d26c9f421be029b7a5d68732643fdaee4bac623b5debd8db5047f2464ab

Granted. Signature good, checked when this page was built.

Product: noticesolved-ai-act-pro
Site: shop-one.example.com
Tier: pro
Features: file, vendors
Seats: 1
Paid to: 2026-11-12T22:27:19Z
Trusted until: 2026-10-14T22:27:19Z
Signed: 2026-10-13T22:27:19Z

The Contract

Three calls, one request body, one answer shape. The full text is licence-v1.md, and the shape is licence-v1.schema.json.

POST /api/licence/v1/checkWhat the key pays for on this site. Moves nothing.
POST /api/licence/v1/activateTakes a seat for this site, then answers as check does. A seat is one site the key is switched on for.
POST /api/licence/v1/deactivateFrees the seat, so a customer can move a site even on a lapsed key.

{ "key": "lb_…", "site": "shop.example.com", "product": "noticesolved-ai-act-pro", "plugin_version": "1.4.0" }

A refusal carries exactly one reason, from this closed list
Reason	Meaning	What the plugin shows
`unknown_key`	No subscription carries this key.	Ask for the key again.
`revoked`	We switched the key off by hand: a refund, a chargeback, a key posted in public.	The support address.
`expired`	The subscription is cancelled, unpaid, or past its paid period.	The renewal link.
`seat_limit`	Every seat is taken and this site holds none.	The sites, and a way to free one.
`product_mismatch`	The key belongs to another product.	The product the key is for.

Anything but a 200, and any network failure, means no answer: the plugin keeps its last signed one and changes nothing.

Our Own Add-ons

Our first customers are our own plugins. On 13 October 2026, none of the three NoticeSolved Pro add-ons could switch on for a paying customer: each turns on only where our own sites set NOTICESOLVED_DOGFOOD, and each names a licence address that does not resolve.

The three Pro add-ons, read from their source on 2026-10-13
Add-on	Licence address it names	Resolves	On for a paying customer
`contentsolved-ai-act-wordpress`	`ai-act.noticesolved.io/api/licence/v1`	No (ENOTFOUND)	No: our own sites only
`contentsolved-consent-wordpress`	`consent.noticesolved.io/api/licence/v1`	No (ENOTFOUND)	No: our own sites only
`contentsolved-access-wordpress`	`access.noticesolved.io/api/licence/v1`	No (ENOTFOUND)	No: our own sites only