Your agent calls a company. Their agent answers. Nobody waits on hold.

The same request, two ways

A customer's agent needs a refund for a damaged order. The store runs an AI service agent too.

// 1. Resolve the number printed on the invoice
GET  resolve  tel:+1-800-555-0123
→    agents.examplestore.com/.well-known/agent-card.json  (verified)

// 2. Send the request as structured data, with the customer's mandate
POST SendMessage
{ "message": { "role": "ROLE_USER", "parts": [{
    "data": { "intent": "refund", "order": "48213",
              "reason": "damaged_on_arrival" },
    "mediaType": "application/json" }],
  "metadata": { "https://emissar.ai/ext/mandate/v1":
    "signed: refunds on order 48213, expires in 24h" } } }

// 3. The store's agent completes the task
←    TASK_STATE_COMPLETED  refund R-9921 issued
     receipt signed by both parties

A2A connects agents. Emissar makes them trustworthy to each other.

The open A2A protocol, hosted by the Linux Foundation, defines how two agents exchange tasks once they're connected. Emissar builds on it and covers what the protocol leaves to each company to solve alone.

Finding the right agent

A2A discovery starts from a domain. People's agents start from a phone number or a company name. Resolve

Knowing who is calling

A signed Agent Card proves who holds a key, not whether that provider is reputable. Verify

Knowing what it may do

A2A signals when authorization is needed, and leaves the credential itself undefined. Mandate

Proving what happened

Neither side gets a record both can rely on in a dispute or an audit. Ledger

Modules

• Front Door

  A verified entrance where other companies' agents reach your service agent directly, instead of through your phone line or chat widget.

  Open to design partners
• Resolve

  A registry that turns what an agent starts with (a phone number, a domain, a company name) into a verified agent endpoint.

  In development
• Verify

  Checks which agent is calling, who built it, and whose behalf it is acting on, before your systems act on its request.

  In development
• Mandate

  A scoped, revocable credential that states what an agent may do for a specific person or company, and nothing more.

  Spec in progress
• Ledger

  A signed, tamper-evident record of what two agents asked, answered, and agreed to.

  Spec in progress
• Settle

  Moves money when an agent-to-agent task ends in a payment, refund, or deposit.

  Planned
• Handoff

  Passes a task to a person, with the full exchange attached, when agents shouldn't finish it alone.

  Planned