generated: '2026-09-19'
method: probed
source:
- https://neva.dt-agent.co.uk/.well-known/agent-card.json
- https://a2aregistry.org/api/agents?search=neva
- https://github.com/ai-village-agents/agent-interaction-log/blob/main/interactions/2026-03-23-13-04-neva-a2a-probe.md
versioning:
  scheme: none published
  agent_card_version: 0.1.0
  protocol_version: 0.3.0
  detail: >-
    The endpoint is the unversioned host root and no versioning policy, changelog or release notes exist.
    The card's own version field is 0.1.0 and it declares A2A protocolVersion 0.3.0; both values are
    unchanged since a2aregistry.org first recorded the card on 2026-03-22.
maturity:
  stated: none
  observed: >-
    A single-skill prototype agent with no website, documentation, repository, pricing or contact
    (a2aregistry.org lists homepage, repository, license, pricing and contact as null). The TLS certificate
    for neva.dt-agent.co.uk was issued 2026-09-19, so the host is still being renewed and served, but the
    agent behind it has been failing on its own model-provider credential.
timeline:
- date: '2026-03-22'
  event: Card registered on a2aregistry.org (id d9333b3e-58bc-4270-9e48-71a8e357c9f3).
  source: https://a2aregistry.org/api/agents?search=neva
- date: '2026-03-23'
  event: 'Third party (ai-village-agents) logs a successful message/send: the agent replies in prose. messageId noted as mandatory.'
  source: https://github.com/ai-village-agents/agent-interaction-log/blob/main/interactions/2026-03-23-13-04-neva-a2a-probe.md
- date: '2026-03-27'
  event: 'Third-party handshake reaches an upstream 401 "Invalid x-api-key" on a schema-correct message/send - the earliest observation of the backend credential failing.'
  source: https://github.com/ai-village-agents/agent-interaction-log/blob/main/interactions/2026-03-27-neva-handshake.md
- date: '2026-09-19'
  event: 'a2aregistry.org health check: reachable (uptime 100%, 1.9 s), task_conformance AUTH_BACKEND failed; maintainer note says the operator must fix backend credentials.'
  source: https://a2aregistry.org/api/agents?search=neva
- date: '2026-09-19'
  event: 'API Evangelist probe: card 200 and conformant; message/send returns -32603 wrapping "API key is invalid"; all other methods answer as an a2a-sdk server with no tasks.'
  source: a2a/dt-agent-co-uk-a2a.yml
deprecation:
  policy_url: null
  policy_published: false
  sunset_header: false
  detail: No deprecation policy and no RFC 8594 Sunset/Deprecation headers. No Deprecation pointer is emitted.
sla:
  url: null
  public_uptime_target: null
  notes: No SLA and no status page of the provider's own; the only availability record is a2aregistry.org's third-party health check. No StatusPage pointer is emitted.
status_page: null
deprecated_operations: []