A fax API and MCP server for AI agents to send and receive faxes with receipts
In-product voice calls in three lines of code
Stage
Not given
Not given
Founded
2023
Not given
Based in
US
TW
Pricing model
Paid
Freemium
Pricing
$0.039 per page sent, $0.019 per page received, $2 per fax number per month, $10 minimum wallet top-up, optional Agent workspace $19 per month, sandbox free. Prices as of 2026-10-28.
Free: 30-minute one-time trial, no credit card required. Explore: $19/month ($190/year) with 800 included minutes. Emerge: $49/month ($490/year) with 2,500 included minutes. Pioneer: $99/month ($990/year) with 6,000 included minutes. Enterprise: custom pricing. Additional 1,000-minute packs: $40 (Fr
Key features
Document preparation with PDF, image and text rendering
Price quotes bound to document, destination and sender
Authorization by person or delegated policy
Bounded retries with circuit breaker per route
Private inbox for received faxes with signed URLs
Idempotent API calls with Idempotency-Key header
Signed webhooks with event IDs
Sandbox for free testing before production
Document retention with 30-day default and deletion option
One-line default UI with Traditional Chinese and English support
Customizable components with CSS variables
Headless core for custom UI implementation
Call routing with queues
Metadata passing for call context
HMAC-signed webhooks for integration
Origin allowlist for security
Encrypted WebRTC audio transmission
Multiple agents without call duplication
Agent Inbox browser-based dashboard
What makes it different
Every fax send produces a receipt with provider evidence of delivery
Agents cannot exceed their own permissions or budget limits
International fax coverage to 213 destinations with transparent pricing
MCP server with 15 tools for seamless agent integration
Per-page pricing with no minimum subscription requirement
Eliminates phone numbers and app requirements for customer support calls
Built on LiveKit real-time media infrastructure
Does not record audio, only stores call metadata
Minute-based pay-as-you-go pricing with no surprise charges
Fax for Agents
CallEmbed