Deep-dive guides on AI agents, agent orchestration, MCP, and developer tooling.
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A webhook endpoint is just a public URL that runs code when it receives a POST — which means anyone who finds it can send you fake events unless you verify the signature correctly, including the two checks most implementations skip.
A dropped connection makes a client retry a POST that already succeeded — without an idempotency key, that retry becomes a duplicate charge, not a safety net. Here's how the pattern actually works and where naive implementations fail.