Alerts and Webhooks

Alerts are persisted, then delivered through configured channels and outbound webhooks.

sequenceDiagram participant Scrape participant Eval as PriceChangeEvaluator participant Alerts participant Webhooks participant Host Scrape->>Eval: latest observation Eval->>Alerts: price.changed or undercut.detected Alerts->>Webhooks: enqueue delivery Webhooks->>Host: signed JSON payload

When a webhook subscription has a secret, deliveries include X-PI-Signature: sha256=<hmac>.

Unsigned deliveries

Unsigned webhooks are possible only when no secret is configured. Use a secret in production.

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