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Webhook URL

https://your-store.com/?wc-api=stablecoin_webhook
Meum resolves and persists this URL during WooCommerce connect.

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Verification (plugin)

The plugin verifies:
  1. X-Stablecoin-Signature header (v1 HMAC or legacy sha256= format)
  2. X-Stablecoin-Timestamp within 300 seconds (replay protection)
  3. X-Stablecoin-Integration-Id matches local integration ID

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Duplicate handling

Event IDs stored in order meta _stablecoin_processed_events (last 50). Duplicates return HTTP 200 with { "duplicate": true }.

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Expected HTTP response

Return HTTP 200 with JSON { "received": true }.