A fax API and MCP server for AI agents to send and receive faxes with receipts
Verified paid APIs for AI agents
Stage
Not given
Startup
Founded
2023
Not given
Based in
US
Not given
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 access to the directory API and MCP server. Listing a new API costs $0.25 USDC from October 26, 2026, which includes one real purchase verification.
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
Real USDC purchases to verify API delivery
Paid-verified status with Base blockchain transactions
Reputation scores from recency-weighted probe pass rates
Continuous endpoint probing every 2 minutes to 8 hours
Free discovery API with three-line pre-spend checks
MCP server integration with search and detail tools
Machine-readable catalogue in NDJSON format
Purchase outcome tracking and transaction visibility
Dispute resolution and result correction in public
Automatic payment address rotation detection
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
Only directory that pays with real USDC to verify delivery
Public ledger of all purchases and transactions on blockchain
Fax for Agents
nohumans.directory