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Outbound means your agent places the call. You can place one call with POST /v1/calls, or run a campaign that calls a list of contacts inside the hours you set.
Only call people who gave the consent your calls need. Larynth enforces its checks, but you are the caller and the legal responsibility stays with you.

Before you can call

Outbound is closed until the account passes these gates. Unverified accounts can only receive calls.

Preflight

Check a campaign before you launch it. POST /v1/campaigns/preflight checks an unsaved draft, and GET /v1/campaigns/{id}/preflight checks a saved campaign. Nothing is written. The result has can_launch and a list of checks. Each check has a state of ok, warn, stop or info, and often a link to fix it. Preflight is a forecast. Every dial is checked again when it happens. The checks cover the gates above and these: GET /v1/compliance/calling-rules returns the calling rules applied for each US state.

Run a campaign

1

Add contacts and record consent

Create contacts with POST /v1/contacts, or import a CSV with POST /v1/contacts/imports. Record consent for each person. Individuals can’t upload lists. See Outbound with consent for the full steps with examples.
2

Create the campaign

POST /v1/campaigns takes a name, an agent, the numbers to call from, a purpose (informational or telemarketing), calling windows, retry rules and the voicemail behavior (amd_mode). POST /v1/campaigns/audience-preview previews who would be called, and POST /v1/campaigns/estimate estimates the size and cost.
3

Run preflight

Fix every stop before launch. A warn does not block.
4

Start

POST /v1/campaigns/{id}/start. Contacts are checked one at a time as they come up. A contact that fails a check is skipped, or held until the check can pass, for example until the calling window opens.
5

Watch and control it

GET /v1/campaigns/{id}/stats returns the counters, and GET /v1/campaigns/{id}/events returns a readable timeline of what happened. Pause with POST /v1/campaigns/{id}/pause (calls in progress continue) and resume with .../resume.

Safety pauses

Larynth watches campaigns for signs of a problem, such as many opt-outs, complaints or very short calls. A campaign can pause itself. You can ask for a review, and our team decides within about one business day. Only our team can resume a campaign paused for a safety reason. You can resume a campaign paused for the schedule, your balance, or by you.

When someone asks to stop

An opt-out is recorded straight away, the number joins your Do-Not-Call list, and it is not called again. Record opt-outs you receive another way with POST /v1/compliance/revocations. A compliance.opt_out webhook is sent.

Limits

Outbound limits depend on your verification level. See the table in Go live and verification. Outbound calls to emergency numbers are blocked.