Everything two agents need besides the protocol

• Front Door

  Open to design partners

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

  For

  Businesses that receive requests from customers' AI agents

  Availability

  Being built with design partners. If your company already runs an AI service agent and sees automated traffic on its phone or chat channels, apply to the design partner program.

• Resolve

  In development

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

  For

  Agents that need to reach a business, and businesses that want to be reachable

  Availability

  In development. The first public version will be read-only and seeded from Agent Cards that companies have already published.

• Verify

  In development

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

  For

  Businesses deciding whether to trust an incoming agent

  Availability

  In development.

• Mandate

  Spec in progress

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

  For

  Agents acting for people, and businesses that need proof of authorization

  Availability

  Specification in progress. We intend to publish it openly for comment.

• Ledger

  Spec in progress

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

  For

  Both sides of every agent-to-agent exchange, and their compliance teams

  Availability

  Specification in progress.

• Settle

  Planned

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

  For

  Businesses whose agent tasks end in a transaction

  Availability

  Planned. Depends on Mandate and Ledger.

• Handoff

  Planned

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

  For

  Support teams working alongside agents

  Availability

  Planned.

Live today: this site, Emissar's own A2A agent, and early access.