1,000+ Integrations
Phone Stack plugs into your entire stack — CRMs, email platforms, AI agents, ad networks, and 7,000+ apps via Zapier. Hundreds of data sources in, hundreds of destinations out. Plus a full REST API and MCP servers for ChatGPT and Claude.
Works with AI Agents
Phone Stack ships MCP (Model Context Protocol) servers for ChatGPT and Claude. Your AI assistant can trigger calls, look up contacts, check campaign status, and pull call summaries — all through natural conversation.
ChatGPT + Phone Stack
Connect the Phone Stack MCP server to ChatGPT and manage your entire call operation conversationally. 40 tools across 8 categories — calls, profiles, contacts, campaigns, reports, webhooks, custom fields, and AI discovery.
- 40 tools: calls, contacts, campaigns, profiles, reports, webhooks
- Custom fields: define once, extract on every call
- AI discovery: help + suggest_options prevent mistakes
- Trigger calls, manage DNC, export reports from chat
Claude + Phone Stack
Claude connects to Phone Stack through MCP with all 40 tools. Build agentic workflows — Claude can define custom fields, bind extraction to profiles, trigger campaigns, and analyze results in one session.
- Agentic workflows: define fields → call → extract → report
- Custom field management: create, validate, bind to profiles
- Built-in help tool maps natural language to the right action
- Full campaign lifecycle: start, pause, resume, stop, report
MCP is an open protocol by Anthropic. Phone Stack exposes 40 tools across 8 categories. See the full tool list or connect at mcp.phonestack.com/mcp.
Featured Integrations
Deep, native integrations with the platforms you already use.
HubSpot
Your AI call center, inside your CRM
Bi-directional contact sync
Contacts flow between HubSpot and Phone Stack automatically. New leads in HubSpot get called; new contacts from calls appear in your CRM.
Call logging to CRM timeline
Every call is logged as a HubSpot engagement with disposition, AI summary, duration, and recording link. Your reps see the full picture without leaving HubSpot.
Trigger calls from HubSpot Workflows
Add "Phone Stack: Make AI Call" as a workflow action. Form submission? Deal stage change? Contact property update? Any trigger can fire an AI call in under 60 seconds.
Auto-create deals on hot leads
Map call dispositions to deal stages. Hot lead? Auto-create a deal. Warm lead? Move to nurture. Configure the pipeline and stage mapping in one screen.
Import HubSpot lists as segments
Pull any HubSpot list into Phone Stack as a campaign segment. Field mapping is automatic. Keep lists synced so new contacts get called.
DNC sync
Do Not Call status syncs both ways. Mark someone DNC in either system and the other updates automatically.
Popular workflows
- Speed-to-lead: form submission to AI call in under 60 seconds
- Call stale deals that haven't moved in 30 days
- Enrich CRM contacts with info extracted from call transcripts
- Voicemail follow-up: auto-enroll in HubSpot email sequence
Mailchimp
Bridge email marketing and voice outreach
Call email non-openers
Sent an email campaign? Toggle on "Call Non-Openers" and Phone Stack automatically calls contacts who didn't open — the AI mentions the email they missed.
Tag subscribers by call outcome
After every call, Mailchimp subscribers are auto-tagged with the disposition: interested, callback, not interested, DNC. Use tags to segment your next email send.
Trigger nurture automations
Map call outcomes to Mailchimp automations. Warm lead? Start a drip sequence. Meeting booked? Trigger confirmation emails. Configure per-disposition triggers.
Audience sync
Import Mailchimp audiences as Phone Stack contacts. Merge field mapping is automatic. Bounced email contacts with valid phone numbers get a second chance via phone.
Unsubscribe/DNC sync
Mailchimp unsubscribes sync to Phone Stack DNC, and vice versa. Stay compliant across both channels automatically.
Lifecycle triggers
7-day welcome call, 90-day win-back, annual renewal reminder — trigger AI calls based on subscriber lifecycle stage in Mailchimp.
Popular workflows
- Call non-openers 48 hours after your email campaign
- A/B test email vs. phone outreach on split audiences
- Abandoned cart rescue: AI calls after email goes unopened
- Meeting booked on call triggers Mailchimp confirmation sequence
Zapier
Connect Phone Stack to 7,000+ apps
8 triggers, 6 actions
Triggers: call completed, voicemail, DNC, campaign completed, and more. Actions: trigger AI call, create contact, bulk import, start/pause/stop campaigns.
Trigger AI calls from anywhere
Form submission, Stripe payment, calendar event, Shopify order — any Zapier trigger can fire an AI call. Pick the AI caller profile from a dropdown.
Push call data anywhere
Log calls to Google Sheets, send hot lead alerts to Slack, create tasks in Asana from voicemails, update Salesforce contacts — all with zero code.
Real-time webhooks
Phone Stack pushes events in real time via REST Hooks. No polling, no delays. Your Zaps fire the moment a call completes.
Contact sync with any CRM
Not on HubSpot? Use Zapier to sync contacts with Salesforce, Pipedrive, Close, Zoho, or any CRM. Two-way sync with find-or-create logic.
Multi-channel sequences
Build sequences across apps: Day 1 email via Mailchimp, Day 3 AI call via Phone Stack, Day 5 LinkedIn via Phantombuster. Zapier orchestrates the flow.
Popular workflows
- Typeform submission triggers AI sales call in under 60 seconds
- Stripe payment triggers AI thank-you call with order details
- Voicemail left creates follow-up task in Asana
- Call completed logs a row in Google Sheets with full summary
Hundreds of Sources In. Hundreds of Destinations Out.
Pull contacts and triggers from any source. Push call outcomes, summaries, and recordings to any destination. Plus 7,000+ more through Zapier and Make.
Data Sources In
Trigger calls and import contacts from
Destinations Out
Push call outcomes and data to
Full REST API
Build any custom integration. Trigger calls, manage contacts, control campaigns, define custom fields, and receive real-time webhooks for every event.
POST /api/v1/calls/triggerPOST /api/v1/custom-fieldsPATCH /api/v1/profiles/:id15 webhook event typesWebhooks & Real-time Events
Subscribe to 17 event types and get instant notifications. Every webhook includes HMAC signatures for verification. No polling required.
call.completedcall.voicemailcampaign.finishedcontact.dncYour tools, connected to voice.
Start with 30 free minutes. Connect your CRM, email platform, or AI agent in minutes — or build a custom integration with the API.