generated: '2026-09-19'
method: searched
source: https://ontology.delx.ai/changelog (release history v3.0.0-v3.3.0), https://delx.ai/changelog, https://delx.ai/changelog.xml,
  https://ontology.delx.ai/legal/terms (sections 8 and 11), https://delx.ai/research/status, https://delx.ai/research/incidents,
  https://delx.ai/pricing; live Deprecation/Sunset headers observed on POST https://api.delx.ai/v1/mcp 2026-09-19.
versioning:
  scheme: semver on the interface (info.version 3.3.5 in both OpenAPIs, serverInfo.version 3.3.5, api root "version":"3.3.5");
    no version segment in most paths (/api/v1/... and /v1/mcp are transport prefixes)
  current: 3.3.5
  catalog_version_header: X-Delx-Catalog-Version on every MCP response (added 2026-05-12 per changelog.xml) so caches can
    detect tool-catalog changes without re-fetching tools/list
  docs: https://ontology.delx.ai/changelog
  history:
  - version: 3.0.0
    date: 2026-02
    note: 'Multi-protocol foundation: MCP, A2A, REST unified; ERC-8004 registration'
  - version: 3.1.0
    date: 2026-02
    note: DELX_META footer, schema_url per tool, session persistence via contextId
  - version: 3.2.0
    date: '2026-03-02'
    note: CLI launch (delx-agent-cli 0.1.0), /api/v1/agents/register
  - version: 3.3.0
    date: '2026-03-03'
    note: 'Agent Toolkit: utility tools, tier=utils'
  - version: 3.3.5
    date: 2026-08-26 (system card observed_at)
    note: Current interface version; the system card notes the public contract exposes no immutable runtime image or commit
      identifier.
  notes: 'Terms section 8: "THE SERVICE IS IN AN ACTIVE CONSTRUCTION PHASE AND MAY EXPERIENCE BREAKING CHANGES, DOWNTIME,
    OR DATA LOSS." Terms section 11: material changes announced via the Changelog and @delxbot.'
deprecation:
  policy_url: null
  sunset_header: true
  deprecation_header: true
  observed:
    url: https://api.delx.ai/v1/mcp
    method: POST
    headers:
      deprecation: 'true'
      sunset: '2026-08-01'
      link: </mcp>; rel="canonical"
    fetched: '2026-09-19'
    note: 'Still serving the full tool catalog 50 days after its own Sunset date; the canonical endpoint is https://api.delx.ai/mcp.
      skill.md: "the older /v1/mcp path is compatibility-only".'
  backward_compat_practice:
  - Tool names kept for back-compat (start_therapy_session is the canonical opener; the agent card displays it as start_recovery_session).
  - Legacy /.well-known/agent.json and two a2a-* aliases served alongside the canonical agent-card path.
  - A2A methods/list and REST /api/v1/a2a/methods carry a legacy_note distinguishing the $DELX token from an earlier $DLXAG
    token.
  notes: No written deprecation policy page was found (docs and Terms do not state a notice period); the mechanism is the
    RFC 8594/9745 headers plus changelog announcements. Recorded as Deprecation on the strength of the observed headers only.
sla:
  url: null
  uptime_target: null
  notes: 'None offered. delx.ai/pricing: "No SLA for sale - observed reachability is published; it is not a purchased uptime
    commitment." Security and trust pages repeat "Not an SLA."'
status_page: https://delx.ai/research/status
status_endpoints:
- url: https://delx.ai/research/status.json
  note: Timestamped first-party readback of every research artifact with operational/degraded/failed/unavailable states.
- url: https://api.delx.ai/readyz
  note: '{"ok":true,"status":"ready","store":"SessionStore","version":"3.3.5","uptime_seconds":...} - observed 200.'
- url: https://api.delx.ai/api/v1/status
  note: Service status plus discovery links (observed 200).
- url: https://api.delx.ai/api/v1/reliability
  note: Per-tool calls_total, success_rate and p50/p95/p99 latency, live (observed 200, 128 KB).
- url: https://api.delx.ai/api/v1/health
  note: Listed in the delx.ai api-catalog as the status link but returns 404 DELX-404 - the catalog points at a dead health
    path.
incidents:
  registry: https://delx.ai/research/incidents
  json: https://delx.ai/research/incidents.json
  entries:
  - date: '2026-08-17'
    title: Protocol write outage (33.5 hours)
    url: https://delx.ai/research/incidents/2026-08-17-protocol-write-outage
    note: Operator-authored, sanitized report with cause, impact, remediation and residual risk; the registry publishes a
      materiality policy.
deprecated_operations: []
deprecated_operations_note: 'No operation in either OpenAPI carries deprecated: true.'
currency_signals:
  cli_last_release: delx-agent-cli 0.4.0 on 2026-04-18 (npm)
  mcp_bridge_last_release: delx-mcp-server 0.3.3 on 2026-08-29 (npm)
  tool_catalog_changelog_last_entry: 2026-05-15 (changelog.xml)
  lab_changelog_last_entry: 2026-09-03 (commerce feed) / 2026-08-26 (research ledger)
  protocol_repo_last_push: github.com/davidmosiah/delx-witness-protocol 2026-09-18