> ## Documentation Index
> Fetch the complete documentation index at: https://docs.verlon.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# List agent traces

> **Use when:** caller wants to browse recorded agent runs (traces), optionally filtered to one agent gate, a status, or a session label

Paginated list of traces — one row per bounded agent run. A trace groups every span of the run (LLM generations, tool executions, nested sub-agents). Filter by `gateId`, `status` (`active`, `completed`, `incomplete`, `error`), or `sessionLabel` (the caller-supplied conversation id).



## OpenAPI

````yaml /api-reference/openapi.json get /v3/traces
openapi: 3.1.0
info:
  title: Verlon AI API
  version: 1.0.0
  description: >-
    Verlon AI is the managed AI infrastructure platform for developers building
    LLM-powered apps and agents. Beyond routing requests across providers,
    Verlon continuously evaluates response quality, runs experiments against
    live traffic, and automatically tunes gate configurations — so your platform
    doesn't just serve traffic, it learns from it.


    **Coding agents:** authentication, error semantics, gate concepts, and
    integration conventions are documented at https://verlon.ai/AGENTS.md — read
    that document first if you have not already. It is the canonical
    agent-facing contract; this specification is the canonical endpoint
    reference. Both are authoritative for their respective scopes.
  contact:
    name: Verlon AI
    url: https://verlon.ai
  license:
    name: Proprietary
servers:
  - url: https://api.verlon.ai
    description: Production
security:
  - bearerAuth: []
paths:
  /v3/traces:
    get:
      tags:
        - Traces
      summary: List agent traces
      description: >-
        **Use when:** caller wants to browse recorded agent runs (traces),
        optionally filtered to one agent gate, a status, or a session label


        Paginated list of traces — one row per bounded agent run. A trace groups
        every span of the run (LLM generations, tool executions, nested
        sub-agents). Filter by `gateId`, `status` (`active`, `completed`,
        `incomplete`, `error`), or `sessionLabel` (the caller-supplied
        conversation id).
      parameters:
        - schema:
            type: string
            format: uuid
          required: false
          name: gateId
          in: query
        - schema:
            type: string
            enum:
              - active
              - completed
              - incomplete
              - error
          required: false
          name: status
          in: query
        - schema:
            type: string
            maxLength: 500
          required: false
          name: sessionLabel
          in: query
        - schema:
            type: integer
            minimum: 1
            maximum: 200
          required: false
          name: limit
          in: query
        - schema:
            type:
              - integer
              - 'null'
            minimum: 0
          required: false
          name: offset
          in: query
      responses:
        '200':
          description: Paginated trace list.
        '400':
          description: Invalid request — Zod validation failure or malformed input
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Missing or invalid Bearer credentials
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security:
        - bearerAuth: []
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Stable error code (e.g. `invalid_request`)
        message:
          type: string
          description: Human-readable error message
        details: {}
      required:
        - error
        - message
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Verlon API key (newly minted keys are prefixed `sk-vrln-`; legacy
        `verlon_*` and `layer_*` keys from prior prefix migrations continue to
        validate). Generated from the dashboard under Settings → API Keys, or
        via `verlon key create` in the CLI.

````