API & Data

How to get invoice line item detail from the Lago Data Pipeline export

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Why updating customer metadata fails with a 422 value_already_exist error

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How to calculate net revenue retention (NRR) using Lago analytics

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How to query invoice and fee data from the Lago database (self-hosted only)

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Why fetching a pending subscription by external_id returns a 404

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How to preview how a coupon will be applied before an invoice is finalized

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Why metadata can't be attached to applied coupons

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How to reset event data for testing

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How to handle the invoice.payment_failure webhook payload

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How to detect billing period rollovers without subscription.updated

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Displaying real-time cost for graduated pricing in your customer dashboard

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409 conflict errors on wallet update due to concurrent requests

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Setting a wallet code: API only, not the UI

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