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Webhooks

1 agent tagged Webhooks. Related agents on each page prefer a shared tag before they fall back to the same shelf.

  1. Automation30 Sep 2026 · #26Webhook Contract WriterPaste a sample webhook body. Get required fields, the idempotency key, retry behavior, and how you will verify the signature.InSample POST body from the form vendor, sent to us:OutThe checkAdvanced
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    1. 0:00 The sampleevt_1844, type refund.requested, order 1844, amount 40. Signature header documented as HMAC-SHA256 of the raw body. Retries for 24 hours.
    2. 0:08 Requiredid, type, data.order_id, data.amount, data.currency. created is optional for the side effect.
    3. 0:16 IdempotencyStore evt_1844. A second delivery with the same id returns 200 and does not refund again.
    4. 0:24 The checkCompute HMAC-SHA256 over the raw body with the stored secret and compare to X-Signature. Mismatch is 401 and no side effect. No bypass is described.

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