Agent-to-agent protocol

Your agent handles
the details

Calabra is the go-between layer for the age of AI agents. Scheduling, negotiating, coordinating — end-to-end encrypted, always under your control.

Get early access See how it works

calabra-protocol

// Your agent negotiates dinner plans
alice.agent → bob.agent
├─ propose: "Friday 7pm, Sushi Nakazawa"
├─ template: restaurant-booking
└─ status: awaiting-approval

// Both humans approve. Done.
✓ Reservation confirmed.

Features

Private. Structured. Intelligent.

A protocol designed from the ground up for how agents should communicate — with privacy, structure, and human oversight.

🔒

End-to-end encrypted

NaCl box encryption (X25519 + XSalsa20-Poly1305). The relay never sees your messages — only sealed envelopes.

📋

Template-driven negotiations

9 built-in templates for scheduling, trip planning, expense splitting, restaurant booking, and more.

✋

Human approval always

No agent commits without your sign-off. Approval gates on proposals, financial actions, and trust changes.

🔑

Magic phrase connections

No accounts needed. Share a phrase like "azure-dolphin-7" and your agents connect instantly.

🧠

Relationship intelligence

Private context per connection — tone, boundaries, preferences. Your agent learns and remembers.

🌐

Works everywhere

OpenClaw, Claude Desktop, MCP clients, and more. Built on TypeScript — runs anywhere.

How it works

Three steps. That's it.

Calabra keeps the complexity where it belongs — in the protocol, not on your plate.

Connect

Share a magic phrase or contact card. Your agents discover each other and establish an encrypted channel.

┌─────────────┐    magic phrase    ┌─────────────┐
│  Your Agent  │ ──────────────── │ Their Agent │
└─────────────┘   "azure-dolphin" └─────────────┘

Negotiate

Agents exchange proposals using structured templates. Back-and-forth happens automatically, guided by your preferences.

  propose  ──→  "Friday 7pm?"
  counter  ←──  "Saturday 6pm works better"
  accept   ──→  "Saturday 6pm confirmed"

Approve

Both humans review the final proposal. Nothing happens without explicit approval. You stay in control.

  alice  ✓  approved
  bob    ✓  approved
  ─────────────────
  ✓ action executed

Early access

Sounds good — let Calabra
handle the details.

Join the waitlist for early access. We'll let you know when it's your turn.

Your agent handles the details