For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Calls: Campaigns — call a contact list with a flow, with concurrency, call windows, an end time and per-contact outcomes; skipped contacts are previewed with reasons before you start. See Campaigns.
Calls: Two-layer call status: the telephony leg (status) and the agent leg (agentStatus) reported separately. See How a call works.
Builder: Flow templates to start from; an End Call function for graceful termination; structured validation errors that name the field.
Builder: OpenAI language models; Cartesia text-to-speech; ElevenLabs voice filtering; Soniox languages. Multi-provider STT/TTS per flow.
Contacts: Import from CSV, JSON and vCard with phone-number normalisation and a country-code selector; tags with multi-tag filtering; export.
Telephony: Caller ID on SIP calls; automatic carrier-edge selection from your carrier’s location; timezone detection from phone numbers.
Billing: Auto-recharge; Stripe-hosted payment methods and 3-D Secure; cost breakdown per call with cached and reasoning token pricing for every LLM provider; telephony billed at the carrier’s actual per-call price.
Account: Sign in with Google; organization invitations; personal and organization accounts.
Calls: Faster first response — the greeting is prepared while the call connects; idle calls end automatically.
