Pricing
What CallMCP costs
The API key and a browser preview of your agent are free. A real phone line — a dedicated number, inbound and outbound MCP phone calls, SMS — starts at $2 for your first week on a paid KaiCalls plan (then from $10/mo on Kai Backup). CallMCP runs on KaiCalls accounts, so these are KaiCalls' prices.
| Plan | Price | Included each month |
Kai Backup backup | $10/mo | ~20 Kai-answered calls, 48 call minutes, 1 number |
Kai Line answering | $79/mo | ~170 Kai-answered calls, 408 call minutes, 1 number |
Kai Office phone | $349/mo | ~800 Kai-answered calls, 1,920 call minutes, 1 number + 3 office lines |
- Free:
POST /api/v1/signupwith an emailed code returns an API key and a browser-only preview. No card. - Intro offer: KaiCalls lists $2 for your first week, then the plan price, for eligible new subscribers. Stripe Checkout confirms your total.
- No per-minute overage. If call volume stays above the plan, KaiCalls recommends the next plan and tells you before anything changes.
- Add-ons: extra lines are $15/mo each (office lines $29/mo on Kai Office). Texting needs carrier registration: included with an active paid Kai Line or Kai Office subscription, $49 once + $15/mo on Kai Backup.
- Annual billing: two months free.
Read from KaiCalls' public plan catalog on 2026-10-30. If anything here differs from kaicalls.com/pricing, that page wins.