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Watermark PDF API — text or image, every page

Custom text, image, position, opacity — every page.

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1 credit per run·Sandbox keys free·REST + Webhooks
01 // COMMON USE CASES
Draft protection
Legal marking
Branding proofs
02 // WHY ASHDOCS
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Zero-retention
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Global
Signed webhooks
Every event is HMAC-signed with `X-ASHDOCS-Signature`. Verifiable in one line.

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