Extend the claim lease
The pure keepalive: extend the owning key’s activity-based lease (per-channel TTL) WITHOUT any other side effect — no spine write and nothing visible to the visitor. Any other owner action (posting a message, typing, reading messages) also extends the lease, so call heartbeat only when you have no other action to send but want to hold the claim. (vs escalationTyping, which also extends the lease but additionally shows the visitor a typing indicator.)
Authorizations
Flowyte secret API key (Authorization: Bearer flowyte_sk_live_…). Scope-gated; is scoped to your organization — a key can never reach another tenant. The listed scopes in each operation's apiKey requirement are the scopes that key must hold. The tokenUrl is nominal: keys are minted in the dashboard.
Path Parameters
The escalation session id whose lease to extend.