Batch Classify Files | Extend Documentation

from extend_ai import Extend
client = Extend(
    token="YOUR_TOKEN_HERE",
    extend_api_version="2026-02-09",
)
client.classify_runs.create_batch(
    classifier={
        "id": "cl_xK9mLPqRtN3vS8wF5hB2cQ"
    },
    inputs=[
        {
            "file": {
                "url": "https://example.com/document1.pdf"
            },
            "metadata": {
                "customerId": "cust_abc123"
            }
        },
        {
            "file": {
                "url": "https://example.com/document2.pdf"
            },
            "metadata": {
                "customerId": "cust_def456"
            }
        },
        {
            "file": {
                "url": "https://example.com/document3.pdf"
            },
            "metadata": {
                "customerId": "cust_ghi789"
            }
        }
    ],
)

Submit up to 1,000 files for classification in a single request. Each file is processed as an independent classify run using the same classifier and configuration.

Unlike the single Classify File (Async) endpoint, this batch endpoint accepts an inputs array and immediately returns a BatchRun object containing a batch id and a PENDING status. The individual runs are then queued and processed asynchronously.

Monitoring results:

Webhooks (recommended): Subscribe to batch_processor_run.processed and batch_processor_run.failed events. The webhook payload indicates the batch has finished — fetch individual run results using GET /classify_runs?batchId={id}.
Polling: Call GET /batch_runs/{id} to check the overall batch status, and use GET /classify_runs filtered by batchId to retrieve individual run results.

Notes:

A processor reference (classifier.id) is required — inline config is not supported for batch requests.
inputs must contain between 1 and 1,000 items.
All inputs in a batch use the same classifier version and override config.

Authentication

AuthorizationBearer

Bearer authentication of the form Bearer <token>, where token is your auth token.

Request

This endpoint expects an object.

classifierobjectRequired

Reference to the classifier to run against every input in this batch.

inputslist of objectsRequired

An array of inputs to process. Each item produces one classify run. Must contain between 1 and 1,000 items.

priorityintegerOptional1-100Defaults to 50

An optional value used to determine the relative order of runs when rate limiting is in effect. Lower values will be prioritized before higher values.

Response

Successfully queued batch classify run

objectenum

The type of object. Always "batch_run".

Allowed values:

idstring

The unique identifier for this batch run.

Example: "bpr_Xj8mK2pL9nR4vT7qY5wZ"

statusenum

The status of a batch run:

"PENDING" - The batch has been created and is waiting to be processed
"PROCESSING" - The batch is currently being processed
"PROCESSED" - All runs in the batch have completed successfully
"FAILED" - The batch failed to process
"CANCELLED" - The batch was cancelled

Allowed values:

runCountinteger

The number of individual runs in this batch.

createdAtstringformat: "date-time"

The time (in UTC) at which the object was created. Will follow the RFC 3339 format.

Example: "2024-03-21T16:45:00Z"

Errors

400

Bad Request Error

401

Unauthorized Error

402

Payment Required Error

403

Forbidden Error

404

Not Found Error

422

Unprocessable Entity Error

429

Too Many Requests Error

500

Internal Server Error

Authentication

Headers

Request

Response

Errors