A fax API and MCP server for AI agents to send and receive faxes with receipts
A typed decision API for routing, classification, and scoring
Stage
Not given
Not given
Founded
2023
Not given
Based in
US
CA
Pricing model
Paid
Paid
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.
$0.040 USD per million input tokens; output is free
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
Choice question type with multiple options and probability scores
Boolean question type for true/false judgments with probability
Score question type with min/max range and level probabilities
Filter list endpoint for ranking JSON items by instruction match
Support for image and audio input with Crossroads-M model
Idempotency keys for safe retries without duplicate charges
Rate limiting with 120 requests per minute default and 4 concurrent requests
Multiple question types per request with single round trip
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
Returns probability scores for every answer to guide decision-making confidence
Supports image and audio analysis alongside text with dedicated audio-trained model
Filter lists by instruction match without writing text generation code
Typed output constrains format while preserving flexible judgment logic
Fax for Agents
Crossroads