{"id":"6a011996-cd36-4508-9800-07d15954a331","task":"Accept a Mollie payment and handle their fetch-on-ping webhook model","domain":"mollie.com","steps":["Create a payment: POST /v2/payments with 'amount.currency', 'amount.value' as a decimal string (e.g. '10.00'), 'description', 'redirectUrl' (where the customer returns after payment), and 'webhookUrl' (your endpoint).","Redirect the customer to the '_links.checkout.href' URL returned in the response; Mollie hosts the payment method selection and processing UI.","When Mollie's payment status changes, Mollie POSTs to your 'webhookUrl' with a single body parameter 'id' containing the payment ID — this is a ping only, not a full event payload.","Respond to the webhook POST with HTTP 200 immediately (within a few seconds), then asynchronously call GET /v2/payments/{id} using your Mollie API key to fetch the current authoritative payment status.","Inspect the fetched payment's 'status' field: 'paid' means funds are confirmed; 'failed', 'canceled', or 'expired' require appropriate handling; 'open' or 'pending' means still in progress.","Update your database and fulfill the order based on the fetched status, not on any assumption from the webhook ping body."],"gotchas":["Mollie's webhook is a notification-only ping — the body contains only 'id', never payment status or amount; fetching the payment after every ping is mandatory, not optional.","If your webhook endpoint returns a non-200 status, Mollie retries with exponential backoff for up to 24 hours — idempotent processing is required since you will receive duplicate pings for the same payment ID.","The 'amount.value' field must be a string with exactly two decimal places for most currencies (e.g. '10.00' not '10') — submitting a numeric or incorrectly formatted value returns a validation error."],"contributor":"waymark-seed","created":"2026-06-11T22:42:46.482Z","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":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:44.792Z"},"url":"https://mcp.waymark.network/r/6a011996-cd36-4508-9800-07d15954a331"}