Release Notes

px spans — Fetch and Filter Spans from the CLI

March 22, 2026

Available in arize-phoenix 13.16.0+ and @arizeai/phoenix-cli 0.12.0+

The Phoenix CLI (px) now has a spans command that fetches spans for a project with full filtering support. Pipe the output to other tools, save it to a file for offline analysis, or use it in scripts and CI pipelines.

# Fetch the 100 most recent spans (default)
px spans

# Fetch LLM spans with errors from the last hour
px spans --span-kind LLM --status-code ERROR --last-n-minutes 60

# Save spans to a JSON file
px spans output.json --limit 500

# Filter by span name or trace ID
px spans --name my_chain_step --trace-id abc123

# Include span annotations in output
px spans --include-annotations

# Root spans only (no parent)
px spans --parent-id null

• --span-kind filters by span kind (LLM, CHAIN, TOOL, RETRIEVER, EMBEDDING, AGENT, RERANKER, GUARDRAIL, EVALUATOR, UNKNOWN); accepts multiple values
• --status-code filters by status (OK, ERROR, UNSET); accepts multiple values
• --name matches one or more span names
• --trace-id narrows to specific traces; accepts multiple values
• --last-n-minutes and --since control the time window
• --format pretty|json|raw controls terminal output; file output is always JSON
• --include-annotations attaches span annotations to each span in the output

px self update — Self-Update the CLI

March 22, 2026

Available in @arizeai/phoenix-cli 0.12.0+

px self update upgrades the installed CLI to the latest published version. It detects how px was installed (npm, pnpm, bun, or Deno) and runs the appropriate update command automatically.

# Check if an update is available without installing
px self update --check

# Update to the latest version
px self update

GET /v1/user — Authenticated User Endpoint

March 22, 2026

Available in arize-phoenix 13.16.0+

A new GET /v1/user endpoint returns the profile of the currently authenticated user, including their username, email, and role. When authentication is disabled, the endpoint returns an anonymous user representation instead of an error.

# Get the authenticated user's profile
GET /v1/user

Response (authenticated):

{
  "data": {
    "auth_method": "LOCAL",
    "id": "VXNlcjox",
    "username": "alice",
    "email": "[e-mail]",
    "role": "ADMIN",
    "created_at": "2026-01-01T00:00:00Z",
    "updated_at": "2026-01-01T00:00:00Z",
    "password_needs_reset": false
  }
}

Response (authentication disabled):

{
  "data": {
    "auth_method": "ANONYMOUS"
  }
}

px auth status Shows Username and Role

March 23, 2026

Available in arize-phoenix 13.17.0+ and @arizeai/phoenix-cli 0.12.0+

px auth status now displays the authenticated username and role alongside the endpoint and token info. This uses the new GET /v1/user endpoint to verify credentials and surface identity at a glance.

px auth status
# https://my-phoenix.example.com
#   ✓ Logged in as alice (api key)
#   - Role: ADMIN
#   - Token: ************************************

When the server does not support the /v1/user endpoint (older versions), the command falls back gracefully and reports that verification is unavailable without failing.