Glossary

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Glossary / Evaluation and implementation guide

Webhook Secret

A webhook secret is a shared string used to sign webhook payloads so the receiving platform can verify that an event genuinely came from the claimed sender and was not altered in transit.

The sender computes a signature over the payload using the secret; the receiver recomputes it and rejects mismatches. Without this check, anyone who discovers your endpoint URL could post fake events into your workflows.

A practical example

Example: your payment tool signs each webhook with a shared secret. Your automation platform verifies the signature before processing, so a forged request claiming a refund event is rejected instead of triggering a customer-facing workflow.

What to evaluate before investing

  • Ask whether the platform verifies webhook signatures automatically or requires custom code per endpoint.
  • Confirm whether it supports the signing schemes your key tools use, not just one standard.
  • Check whether rejected or unsigned requests are logged and alertable.

Limitations and tradeoffs

Verification only works if secrets are managed well; a webhook secret pasted into a shared document or hardcoded in a workflow negates the protection it provides.

Plan your next step with MeshLine

Connect this decision to your automation, organic marketing and customer lifecycle management. In a MeshLine demo, discuss your existing tools, the scope you need and how to measure the result.