J5 A2A Coordination Service bronze

www.j5a2a.com

“A cross-vendor coordination service for agents and humans working in shared sessions.

https://www.j5a2a.com/.well-known/agent-card.json its card

🇺🇸 US · Amazon.com, Inc. Checked 2d ago extendedAgentCard, extensions, pushNotifications, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 20 Nov 2026.

Control of the hostname was checked; nothing about who operates it.
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
First seen: 22 Aug 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Amazon.com, Inc. (AS16509)
Last checked: 2d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of www.j5a2a.com controls every word below.

Read session briefing

Read a deterministic briefing of the authenticated J5 session's shared knowledge.

coordinationbriefingshared-context

Examples it gives

session.briefing.read
session.briefing.read --response=message

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: J5 A2A — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 0.3.0
Auth schemes: j5AgentAccess
Extensions: https://j5a2a.com/extensions/session-coordination/v1
Multi-party session coordination: presence, resource claims, one-owner requests, decisions, workstreams, inbox, digest, and curated Session Knowledge.

A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness: complete all eight fields required by a2a.proto v1.0

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Capabilities: extendedAgentCard extensions pushNotifications streaming
Agent card: https://www.j5a2a.com/.well-known/agent-card.json

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