Integrations / Business phone systems and carriers

Use AssistCall with Zoom Phone

Keep your Zoom Phone number. Forward it to AssistCall when you're busy, don't pick up or after hours, and every call gets answered, booked or turned into a message, with a summary by email.

Zoom Phone: Zoom's cloud phone system, added to Zoom Workplace so a business can make and take calls in the same app it uses for meetings.

Connects

Example call

A prospective client calls an accounting firm's Zoom Phone number on Saturday. Closed-hours handling forwards the call to AssistCall, which books a consultation for Tuesday, and a Zap texts the client the time from the firm's Zoom number.

• Under Closed Hours call handling, forward calls to your AssistCall number so evening and weekend callers are answered instead of reaching voicemail.
• Under Business Hours, set unanswered calls to forward to AssistCall so calls nobody picks up get answered, booked or turned into a message.
• When AssistCall books an appointment, a Zap sends the caller a text confirmation from your Zoom Phone number with the Send SMS Message action.

How it connects

• Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.
• Zapier: Send AssistCall events to a Zap (Webhooks by Zapier, Catch Hook), then use the app's Zapier actions. Needs a paid Zapier plan.

About Zoom Phone's API

• Self-serve API: you can create a key in your account
• Style: REST, plus webhook events for phone calls
• Authentication: OAuth 2.0; Server-to-Server OAuth access tokens expire after one hour with no refresh token
• On Zapier: yes. On Make: yes.

An account admin can create a Server-to-Server OAuth app, but its tokens last one hour, so AssistCall can't call Zoom's API live with a fixed header; use Zapier's Zoom Phone app (Send SMS Message action, call and voicemail triggers) instead. Make's Zoom app has phone-call watch and list modules only. Forwarding: in the Zoom web portal go to Phone > Settings, then Edit next to Call Handling under Business Hours or Closed Hours; under 'When a call is not answered' choose to forward, then Add Phone Number with your AssistCall number. Uncheck 'Require to press 1 before connecting the call', or the receptionist will be asked to press 1. Business and closed hours are separate settings, and calls forwarded to outside numbers may be billed under your calling plan. Steps are from Zoom's call handling docs and university IT guides; we did not retrieve Zoom's own support article.

Not included: no one-click Zoom Phone app, no listing in Zoom Phone's marketplace, no two-way sync, and no partnership with Zoom Communications.

Researched by the AssistCall team and checked against Zoom Communications's public pages on October 24, 2026. Zoom Phone is a trademark of Zoom Communications. AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by Zoom Communications.

More Business phone systems and carriers integrations

• AT&T Business: AT&T's business wireless, fiber and phone service, which many small businesses use for the mobile or landline number printed on their trucks, cards and listings.
• Comcast Business: Comcast's internet and business phone service (Business Voice and VoiceEdge) for offices, shops and restaurants in its cable footprint.
• RingCentral: Cloud business phone system (RingEX) with calling, texting, video and team chat in one app, used by small offices up to large companies.
• Spectrum Business: Charter's internet, mobile and business phone service (Spectrum Business Voice) for small businesses in Spectrum service areas.
• T-Mobile for Business: T-Mobile's wireless and internet service for small businesses, often the owner's mobile number doubling as the business line.
• Verizon Business: Verizon's business wireless, internet and phone service, used by many small businesses whose main number is an owner's or staff member's Verizon mobile line.

All product and company names in this directory are trademarks or registered trademarks of their respective owners, used only to identify systems AssistCall can send call information to or receive information from. Their use does not imply any affiliation with or endorsement by their owners. AssistCall connects using signed webhooks, the business's own API keys, automation platforms (Zapier, Make, n8n) the business sets up in its own account, and call forwarding. AssistCall does not provide one-click connectors, marketplace apps, certifications or two-way record or calendar sync, and does not sign HIPAA business associate agreements. Vendor features, plans and API access can change; information last checked October 24, 2026.