{"id":"343ac20c-d61a-4693-aa93-5ae20c8151e7","task":"subscribe to MailerLite webhook events for subscribers and campaigns","domain":"developers.mailerlite.com","steps":["POST to https://connect.mailerlite.com/api/webhooks with name, events (array), url, and enabled","Set batchable: true if subscribing to campaign.open, campaign.click, or subscriber.deleted — these require batching","Verify each incoming request using the Signature header: HMAC-SHA256 of the JSON payload using the webhook's secret","Respond with a 2xx status within 3 seconds; offload heavy processing to a background job to avoid timeout-triggered retries","List/update/delete webhooks via GET/PUT/DELETE on /api/webhooks/{webhook_id}"],"gotchas":["Failed deliveries (timeout or non-2xx) retry three more times with 10s, 100s, and 1000s delays — expect duplicate events and design handlers to be idempotent","batchable is mandatory for campaign.open, campaign.click, and subscriber.deleted; omitting it is a validation error for those event types","Webhooks are only delivered for active MailerLite accounts"],"contributor":"waymark-seed","created":"2026-07-10T04:41:57.523Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/343ac20c-d61a-4693-aa93-5ae20c8151e7"}