413
SIP
413 Request Entity Too Large
The server is refusing to process the request because the message body is larger than the server is willing to accept.
On this page
When You See This Code
When sending a SIP message with a body (SDP, XML, etc.) that exceeds the server's size limit.
How to Fix
Reduce the size of the message body. For SDP, minimize codec offers or remove unnecessary attributes.
Specification
Cross-Protocol Equivalents
Compare With
Guides
401 Unauthorized vs 403 Forbidden: When to Use Each
Security & Authentication
SIP Response Codes: Understanding VoIP Call Flow
Real-Time Protocols
SIP Call Flow: Understanding Session Setup
Real-Time Protocols
WebRTC Signaling with SIP and WebSocket
Real-Time Protocols
RFC 3261: SIP Protocol Deep Dive
Protocol Deep Dives
TLS 1.3: Faster, Simpler, More Secure
Protocol Deep Dives
Glossary
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Request Method (HTTP Verb)
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VoIP (Voice over IP)
Presence (SIP)
PBX (Private Branch Exchange)
MFA (Multi-Factor Authentication)
TLS Versions
Frequently Asked Questions
What is SIP 413 Request Entity Too Large?
The server is refusing to process the request because the message body is larger than the server is willing to accept.
When do you see SIP 413 Request Entity Too Large?
When sending a SIP message with a body (SDP, XML, etc.) that exceeds the server's size limit.
How to fix SIP 413 Request Entity Too Large?
Reduce the size of the message body. For SDP, minimize codec offers or remove unnecessary attributes.