Official sale page

ZMath Shield self-hosted licence.

CallChat itself is not being sold here. Standard Matrix-compatible chat on callchat.org stays free. This page sells the ZMath Shield licence for self-hosted servers that want the protected vault/file layer and entitlement checks.

Buy licence Read licence status API Read Shield

Monthly

Self-hosted ZMath Shield

One public server IP, unlimited users on that deployment, automatic licence verification endpoint.

$55/month Start monthly

Yearly

Annual self-hosted licence

Same one-IP self-hosted licence, paid yearly for simpler admin and fewer renewal events.

$550/year Start yearly

CallChat hosted

Showcase included

Hosted CallChat accounts can see the Shield benefit here. That is not the self-hosted licence.

$0 hosted showcase Open CallChat

Buy and lock the licence to your server IP

The public checkout accepts the IPv4 lane first. Use the real public IPv4 address of the server that will run the licensed Shield module. Private network IPs, reserved IPs, loopback, documentation ranges, and carrier-grade NAT ranges are rejected by the licence engine.

Contact email Public server IPv4

Deployment domain or hostname

$55/monthRecurring monthly self-hosted licence. $550/yearRecurring yearly licence.

I understand this licence is for one public server IP and does not grant rights to republish private ZMath source code.

Only trust purchases started from https://callchat.org/license/. The PayPal receiver must be paypal@talktoai.org.

How verification works

One public IP

The licence is bound to the public server IP supplied during checkout or owner-issued comp creation.

IPv4 main lane

The public checkout is IPv4-first. IPv6 can be issued deliberately by the owner for suitable deployments.

No NAT ranges

Private, reserved, loopback, documentation, multicast, and carrier-grade NAT ranges fail validation.

Safe public API

The verification endpoint returns entitlement status and safe feature flags, never private Shield internals.