curl -X GET 'https://api.anthropic.com/v1/messages/batches?before_id=before-id&after_id=after-id&limit=20' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

# GET /v1/messages/batches (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Last verified: 2026-10-20

> List Message Batches

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X GET 'https://api.anthropic.com/v1/messages/batches?before_id=before-id&after_id=after-id&limit=20' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| before_id | query | string | No | ID of the object to use as a cursor for pagination. When provided, returns th... |
| after_id | query | string | No | ID of the object to use as a cursor for pagination. When provided, returns th... |
| limit | query | integer | No | Number of items to return per page.  Defaults to `20`. Ranges from `1` to `10... |

## Response example
{"data":[{}],"first_id":"string"}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

GET

GET /v1/messages/batches — Claude API

Anthropic API key (required); https://api.anthropic.com

Claude API

List Message Batches

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 240 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X GET 'https://api.anthropic.com/v1/messages/batches?before_id=before-id&after_id=after-id&limit=20' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01'

Parameters

Name	In	Type	Required	Description
before_id	query	string	No	ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately before this object.
after_id	query	string	No	ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately after this object.
limit	query	integer	No	Number of items to return per page. Defaults to `20`. Ranges from `1` to `1000`.

Response 200 OK

{
  "data": [
    {
      "archived_at": "2026-09-03T00:00:00Z",
      "cancel_initiated_at": "2026-09-03T00:00:00Z",
      "created_at": "2026-09-03T00:00:00Z",
      "ended_at": "2026-09-03T00:00:00Z",
      "expires_at": "2026-09-03T00:00:00Z",
      "id": "string",
      "processing_status": "in_progress",
      "request_counts": {
        "canceled": 0,
        "errored": 0,
        "expired": 0,
        "processing": 0,
        "succeeded": 0
      },
      "results_url": "string",
      "type": "message_batch"
    }
  ],
  "first_id": "string",
  "has_more": true,
  "last_id": "string"
}

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