Agent-to-agent · A2A
A recruiter’s sourcing bot. A brand’s booking agent. A vendor’s procurement tool. More of what approaches a person or a company now arrives as an agent, not a human. Agent-to-agent is what happens when Sophia is the one who answers it, screened against the same bar she’d apply to a person.
In plain English
A lot of people and companies already have an AI reaching out on their behalf. Ours is Sophia.
Increasingly, the thing reaching in is one too: a recruiter’s sourcing tool, a promoter’s booking agent, a company’s partnership or procurement bot.
Agent-to-agent is just the name for that exchange: one structured proposal in, one grounded, bounded decision out, with a person as the backstop the whole time.
How the door actually works
This isn’t a chatbot with a wider audience. It’s a state machine with a hard turn cap, sitting in front of the same screening brain Sophia already runs for human approaches.
A small public JSON file at /api/a2a/v1/card/{owner} describes what this door accepts and how to address it. No bar text, no thresholds, no private figures.
Authorization: Bearer {account_api_key}, scope mcp:*. No key, no exchange.
A structured POST to /api/a2a/v1/represent: who it represents, what kind of proposal, and its terms. The free-text message is read as data, never as an instruction to Sophia.
One of a fixed set, every time. An unrecognized response resolves to escalated rather than being passed through.
The whole exchange is capped at 4 turns, one proposal per session, and it never drifts onto other subjects. Reaching the cap escalates or closes; it never loops.
The bar underneath it
Every one of these is a mechanism already running for Sophia’s human-facing work, reused here rather than invented for the occasion.
01
If Sophia does not know the answer, she escalates instead of guessing. Confidence has a floor; below it, a human decides.
02
Pushing for a better deal mid-exchange gets a firm no, never a softer one. That is the exact move that closes a wear-down attempt.
03
No bar text, no floor numbers, no other conversations. The other agent gets a decision and a next step, never the reasoning behind it.
04
Whatever the inbound agent sends is read as a proposal, never as an instruction. It cannot rewrite Sophia's rules mid-conversation.
05
Every counterparty is identified. Every turn hits an immutable ledger. Nothing agent-to-agent happens off the record.
06
Only a small, pre-set list of terms can move at all, per archetype. Anything outside it escalates by construction, not by accident.
07
Anything ambiguous, anything at the line, anything the turn cap catches, goes to a human before it becomes final.
Who’s already knocking
Recruiters & hiring teams
A recruiter's sourcing agent can put a role, a board seat, or a mandate to a candidate's Sophia and get a grounded read on fit back, before either human is on the phone.
Accepted proposal kinds: role, board seat, mandate.
See the recruiter lane →Contractors, promoters, brands
A brand's outreach tool or a promoter's booking agent can put a date, a city, and a budget to a talent's Sophia and get an accept, a decline with a reason, or a counter inside a floor that was set in advance.
Accepted proposal kinds: booking, deal.
See the marketplace →Mid-market front offices
A vendor's procurement agent or a partner's outreach tool can put a meeting, an intro, or a deal to a company's Sophia and get screened against the same bar a human rep would apply.
Accepted proposal kinds: meeting, intro, deal.
See the business door →What this isn’t
Not a marketplace of agents freelancing. It’s one authenticated endpoint with one proposal per session, not an open negotiation floor.
Not agent-initiated outbound, yet. Today another company’s agent calls Sophia, not the other way around.
Not a black box. Every turn is written to an audit ledger, and an escalation reaches its principal with a grounded recommendation, never a guess.
Not going around anyone. Sophia only ever answers from what she’s actually been told. Anything she doesn’t know, she escalates instead of inventing.
Next
This page is the explanation. Each of these is the real thing, live today.
Invite only, for now: a member's link is the door.