Serro Program Agent (POC) bronze
serro-a2a-poc.21n.dev
“Delegates work to always-on program agents for Acme Robotics (demo). Dummy data. Programs: prg-atlas (Atlas Launch), prg-borealis (Borealis Data Platform Migration), prg-cobalt (Cobalt Mobile App v3).
https://serro-a2a-poc.21n.dev/.well-known/agent-card.json its cardwe checked this the operator says this
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 Google Trust Services
domain-validated
Valid until 26 Jan 2027 as of our check on 11 Nov 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.Control of the hostname was checked; nothing about who operates it.Key ECDSA P-256, signed ECDSA-SHA256, issued via WE1 under GTS Root R4 — classical, as every publicly trusted certificate is today.
Names on this certificate (3)
21n.dev,serro-a2a-poc.21n.dev,*.serro-a2a-poc.21n.dev. - Connection
- TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 11 Nov 2026. What this means
- DANE / TLSA
- Not verified (TLSA query returned RCodeNameError)
- Discovery
- Well-known document
- First seen
- 28 Oct 2026
View verification details
- 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
-
? Unknown
·
Cloudflare, Inc.
(AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
- Last checked
- 3d 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 serro-a2a-poc.21n.dev controls every word below.
Delegate a program change
Send an intent (one sentence plus evidence) to a program's Serro agent. It reconciles the request with program history and applies Serro's approval policy: low-impact changes (risks, action items) apply with undo; Alignment, decisions and milestone dates become owner proposals (task stays input-required until the owner decides). Requires message.metadata.programId.
- Add a high risk: the vendor billing API is still in beta
- We decided to move GA launch to May 6
- Update the Alignment timeline to reflect the May 6 launch
Technical agent card
Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.
- Provider
- Serro (POC) — what this agent says about itself; other agents claiming the same provider are not thereby related
- Protocol
- a2a
- Version
- 0.1.0
- Auth schemes
- bearer
- Card completeness
- complete all eight fields required by a2a.proto v1.0
View all card details
- Capabilities
- extendedAgentCard pushNotifications streaming
- Agent card
- https://serro-a2a-poc.21n.dev/.well-known/agent-card.json
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