---
title: "A2A Get Task"
method: GET
path: "/api/v1/a2a/tasks/{a2a_task_id}"
---

# A2A Get Task

`GET /api/v1/a2a/tasks/{a2a_task_id}`

## Request

- Base URL: `http://127.0.0.1:8052`
- URL: `http://127.0.0.1:8052/api/v1/a2a/tasks/{a2a_task_id}`
- Auth: none declared

Get an A2A task by ID, syncing status from the Bernstein task.

## Path parameters

- `a2a_task_id` string, required

## Response `200`

Successful Response

- A2ATaskResponse: Serialised A2A task in responses. ``receipt`` carries the lineage receipt for an inbound task (#2609): the execution evidence a caller verifies offline with ``bernstein a2a verify --receipt``. It is ``None`` on read paths, and on write paths when the node could not provision receipt key material - an absent receipt means "unattested", which a caller should treat as unverified rather than trusted.
  - `id` string, required
  - `bernstein_task_id` string, nullable, required
  - `sender` string, required
  - `message` string, required
  - `status` string, required
  - `artifacts` A2AArtifactResponse[], required
    - `name` string, required
    - `content_type` string, required
    - `data` string, required
    - `created_at` number, required
  - `created_at` number, required
  - `updated_at` number, required
  - `receipt` object, nullable

## Other responses

- `404`: A2A task not found
- `422`: Validation Error

---

[API](https://skmtc.dev/bernstein/apis/bernstein-task-server.md) · [All operations](https://skmtc.dev/bernstein/apis/bernstein-task-server/llms.txt) · [OpenAPI document](https://skmtc.dev/bernstein/apis/bernstein-task-server/revisions/2a20a34ad2eb?raw)