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The fastest lead is the one you call first. Instant Lead Follow-up gives your workspace a private webhook URL: POST a lead to it, and a call to that lead is queued within about 15–30 seconds — no dashboard action needed. It works with any source that can send a webhook: a form on your website, your CRM, or an automation tool such as Zapier, Make or n8n.

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Before you start

The lead is called from your first active phone number that’s assigned to a live agent, and that agent takes the call. Set one up under Phone Numbers first — without one, leads aren’t queued.

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Set it up

1

Copy your webhook URL

Go to Integrations and find the Instant Lead Follow-up card. Click the eye icon to show the full URL and the copy icon to copy it. Only admins and the workspace owner can see it.
Instant Lead Follow-up card showing the webhook URL with the token masked, and eye and copy icons

The Instant Lead Follow-up card on the Integrations page. The token stays hidden until you click the eye icon.

2

Point your lead source at it

In your form tool, CRM or automation, add a step that sends a POST request with a JSON body to that URL.
3

Send a test lead

Use your own phone number. Your agent should call you within about half a minute.
The URL contains a secret token for your workspace. Keep it private — anyone with it can queue calls on your account.

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What to send

Send a JSON body with the lead’s phone number and, ideally, their name:
If you’d rather not keep the token in the URL, send it in an X-Vistrow-Webhook-Token header (or as Authorization: Bearer <token>) and drop it from the URL. The response is always JSON. "ok": true means the call was queued. If it wasn’t, reason says why — for example no_phone_in_payload, invalid_phone, or auto_call_not_ready_or_paused (no live agent with a phone number yet, or the follow-up campaign is paused). Sending the same lead twice while its call is still pending doesn’t queue a second call.

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Your calling rules still apply

Every queued call goes through your Calling rules, exactly like a regular campaign. Numbers on your Do-Not-Call list are never dialed, and a lead that arrives outside your calling window waits until the window opens.