curl -X GET 'https://api.anthropic.com/v1/messages/batches/message-batch-id/results?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

# GET /v1/messages/batches/{message_batch_id}/results?beta=true (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Status: Beta.
Last verified: 2026-10-20

> Retrieve Message Batch results

## 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/message-batch-id/results?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| message_batch_id | path | string | Yes | ID of the Message Batch. |

## Response example
{"custom_id":"string","result":{"message":{},"type":"succeeded"}}

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

GET

GET /v1/messages/batches/{message_batch_id}/results?beta=true — Claude API

Beta

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

Claude API

Retrieve Message Batch results

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
→ 166 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/message-batch-id/results?beta=true' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01'

Parameters

Name	In	Type	Required	Description
message_batch_id	path	string	Yes	ID of the Message Batch.

Response 200 OK

{
  "custom_id": "string",
  "result": {
    "message": {
      "id": "string",
      "type": "message",
      "role": "assistant",
      "content": [
        {
          "citations": null,
          "text": "string",
          "type": "text"
        }
      ],
      "model": "string",
      "stop_reason": "end_turn",
      "stop_sequence": null,
      "stop_details": null,
      "usage": {
        "cache_creation": null,
        "cache_creation_input_tokens": null,
        "cache_read_input_tokens": null,
        "fallback_credit": null,
        "inference_geo": null,
        "input_tokens": 0,
        "iterations": null,
        "output_tokens": 0,
        "output_tokens_details": null,
        "server_tool_use": null,
        "service_tier": null,
        "speed": null
      },
      "input_transformations": [
        {
          "path": "string",
          "reason": "model_binding_mismatch",
          "type": "thinking_dropped"
        }
      ],
      "diagnostics": null,
      "context_management": null,
      "container": null
    },
    "type": "succeeded"
  }
}

Get a free Claude API key → sponsored

Affiliate link - we may earn a commission, at no extra cost to you.