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The Webhook Relay Blog
Guides, tutorials and comparisons for receiving, testing, securing, transforming and routing webhooks — from localhost to production.
n8n Webhook Deduplication: Stop Duplicate Retries Without Redis
How to dedupe webhook retries in n8n: Data Tables vs the Remove Duplicates node vs Redis, why lookups race, and how to drop duplicates before n8n with a KV store.
Kestra Security: CVE-2026-49869 and Webhooks Without Exposure
Kestra security guide for CVE-2026-49869: trigger Kestra flows from webhooks without exposing the API or UI, using an outbound-only Webhook Relay agent.
Langflow Vulnerabilities: CVE-2025-3248 and 5 More Exploited Bugs
Six exploited Langflow vulnerabilities, CVE-2025-3248 to CVE-2026-9198: what each gives an attacker, fixed versions, and how to keep Langflow off the internet.
n8n Security: CVE-2025-68613 and Keeping the Editor Private
n8n security after CVE-2025-68613: what the n8n vulnerabilities allow, why the editor must stay private, and how to receive n8n webhooks without exposing it.
TeamCity Vulnerability: CVE-2023-42793 and CVE-2024-27198
TeamCity vulnerability guide: CVE-2023-42793, CVE-2024-27198, CVE-2024-27199 and CVE-2026-63077, and how to keep the build server off the internet.
Jenkins Vulnerabilities Exploited in the Wild: CVEs and Endpoints
Which Jenkins vulnerabilities were exploited, from CVE-2024-23897 to the 2026 advisory, which endpoint each hit, and how to stop exposing Jenkins publicly.
Webhook Best Practices: A Checklist for Senders and Receivers (2026)
Webhook best practices for senders and receivers: Standard Webhooks signing, retries with backoff, endpoint isolation, 410 handling, replay; verify, ack fast, dedupe.
Webhook System Design: How to Build a Webhook Delivery System
How to implement webhooks: the architecture of a webhook delivery system (outbox, fan-out, per-endpoint queues, retries, signing, delivery log) and build vs buy costs.
Pipedream Workflows Is Shutting Down: How to Migrate to Webhook Relay
Pipedream Workflows and String shut down on March 31, 2027. Export your workflows, and use Webhook Relay functions with KV and file stores to rebuild them — or let Claude or Codex do the port.
Hook0 Alternative: Webhook Relay vs Hook0 for Sending Webhooks (2026)
Hook0 vs Webhook Relay for outbound webhooks: Standard Webhooks vs a custom signature, SOC 2 Type II, 35-day history on every plan vs daily event caps from €59/mo.
Hookdeck Outpost Alternative: 35-Day Webhook History From $9.99, Standard Webhooks by Default
Hookdeck Outpost vs Webhook Relay for outbound webhooks: 7-day vs 35-day history, $499 vs $9.99 for 30+ days, default signature scheme, portal, destinations and self-hosting.
Webhooks as a Service Compared: Svix vs Hookdeck Outpost vs Convoy vs Hook0 vs QStash vs Webhook Relay (2026)
Svix, Hookdeck Outpost, Convoy, Hook0, QStash and Webhook Relay compared for sending webhooks to customers: pricing at 100k to 50M messages, retention, signatures, portal, self-hosting, compliance.
Debug OpenAI MCP Events Delivery with Webhook Relay
Trace OpenAI MCP Events from a source webhook to ChatGPT. Debug local handlers, subscription filters, signatures, retries, and callback delivery with Webhook Relay.