https://payhook.co/blog/ Articles on payment webhooks: how Stripe, Paddle, Lemon Squeezy, Polar and Dodo Payments sign events, what their error messages mean, and how to fix them. 2026-09-25T00:00:00Z PayHookhttps://payhook.co/ https://payhook.co/blog/polar-webhook-signature-verification-failed/ 2026-09-25T00:00:00Z 2026-09-25T00:00:00Z

Why @polar-sh/sdk can answer "No matching signature found" for a Polar webhook secret issued after 8 September 2026, which key your secret uses, and how to verify both.