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    Up to 5,000 free requests · No credit card

    API Reference

    Batch Results, Rejected Items and Retry Options

    How to find out which batch items were not accepted, and two scrape options agents often ask for.

    Rejected items

    A batch can be partly accepted when plan limits are reached. The accepted items run; each rejected item is listed in rejected_items.

    • index: 0-based position of the item in your request.
    • url and reason: the item and a plain explanation.
    • scope: global_concurrent, per_domain_concurrent or global_rate.
    • domain and limit: the domain evaluated and the plan limit for that scope.

    Resubmit only the rejected items

    Retry the items at the listed index values later; do not resubmit the whole batch.

    fallback_on_block

    Set fallback_on_block: true on a request that forces browser rendering (advanced.render_js=true or force_tier="4"). If the browser attempt ends in a verification challenge or a timeout, AlterLab retries once through the standard route and bills the tier that returned the page (billing.tier_used). It is ignored when actions, screenshot, generate_pdf or ocr are requested.

    structured_data (json_v2)

    Request formats: ["json_v2"]. The result includes structured_data.json_ld, structured_data.open_graph, structured_data.twitter_card, structured_data.microdata and structured_data.meta_tags.

    Last updated: June 2026

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