Deep-dive guides on AI agents, agent orchestration, MCP, and developer tooling.
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Your phone and a server that have never exchanged a packet since enrollment somehow agree on the same six-digit code every 30 seconds — here is the RFC 6238 math that makes that possible, with a worked, verifiable example.
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.