All Categories
Browse protocols by category and layer. From the foundational internet protocols to emerging AI & agent protocols.
14
Documented Protocols
1
Active Category
Internet Protocols
Layer 1The foundational protocols that power the internet. Core networking, transport, and network layer protocols.
BGPDHCPDNSHTTPICMPIP+11 more
Application Protocols
Layer 2High-level protocols used by applications and services. Modern protocols for web, APIs, messaging, and more.
RESTGRAPHQLSOAPAMQPMQTTOAUTH2+11 more
Data Formats & Standards
Layer 3Data formats, MIME types, headers, and standards that ensure interoperability.
JSONPROTOBUFMSGPACKCBORCSVYAML+1 more
AI & Agent Protocols
Layer 4Protocols for AI systems, agents, and emergent intelligent communication.
MCPA2AX402AUTH-MD
Future Protocols
Layer 5Emerging and experimental protocols that define the future of communication.
SSEWEBRTCWEBTRANSPORTMOQACTIVITYPUBAT-PROTOCOL+3 more
About Our Categorization
Protocols are organized into 5 layers based on the OSI model and modern computing architecture. Each protocol may span multiple layers.
Learn more about our methodologyLayer 5---Future Protocols
Layer 4---AI & Agent Protocols
Layer 3---Data Formats & Standards
Layer 2---Application Protocols
Layer 1---Internet Protocols