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Fix n8n Webhook 413 Payload Too Large on Docker & Nginx (The 3-Layer Solution)
You’re self-hosting n8n on Docker behind an Nginx reverse proxy. Your workflows run flawlessly with small test payloads and test webhooks.
Then, a real production request hits: a Stripe webhook carrying a heavy metadata object, an external form pushing a 25MB PDF attachment, or a web scraper dispatching a large JSON dataset.
Suddenly, the sender receives:
HTTP/1.1 413 Request Entity Too Large
or inside your Docker logs:
PayloadTooLargeError: request entity too la...
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