Protocol
Variants seen in the corpus:
ProtocolsProtocol
Providers using this tag (23)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 2 Usable, with meaningful gaps to close
Thin 3 Limited public surface area
Emerging 12 Early or largely undocumented
APIs with this tag (59)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Exemplar 2 Complete, well-documented, and agent-ready
Strong 3 Solid coverage with minor gaps
Developing 12 Usable, with meaningful gaps to close
Vaultfire Protocol Protocol APIProtocol-wide stats and contractsLeia Protocol APIThe Protocol API from Leia — 1 operation(s) for protocol.XGuard Protocols APIThe Protocols API from XGuard — 1 operation(s) for protocols.SSSNACK Protocols APIThe Protocols API from SSSNACK — 2 operation(s) for protocols.Cambio Healthcare Systems Protocol APIThe Protocol API from Cambio Healthcare Systems — 2 operation(s) for protocol.Delta Lake Storage FrameworkThe Delta Lake storage framework defines the on-disk transaction log and protocol that adds ACID transactio...Dyno Protocols APIThe protocols API from Dyno — 7 operation(s) for protocols.Golioth PouchNon-IP device-to-cloud transport protocol from Golioth, with a companion Bluetooth gateway reference implem...Cenevo Protocols APIThe Protocols API from Cenevo — 2 operation(s) for protocols.Interhyp Protocol APIaccess to submission protocolSignal Protocol SpecificationsThe Signal Protocol Specifications define the core cryptographic protocols that underpin Signal's end-to-en...Swift Binary Protocol (SBP)The native binary protocol for Swift Navigation devices — Piksi and Duro GNSS receivers and the Starling po...
Thin 28 Limited public surface area
Fluentd Forward ProtocolThe Fluentd Forward Protocol is a binary protocol used to transport event streams between Fluentd nodes and...TetraScience Protocols APIThe Protocols API from TetraScience — 11 operation(s) for protocols.Collaborative Drug Discovery Protocols APIProtocols and their readout dataOrca Protocol APIOrca protocol information endpointsPocket Network Shannon Chain APICosmos SDK-based REST and gRPC API for interacting with the Pocket Network Shannon protocol chain. Provides...DeBank Protocol APIGet protocol infoEuler Finance Protocol APIProtocol-wide summary endpoints and aggregate metrics. In v3, these endpoints are explicitly summary-orient...Materials Zone Protocols APIProtocols are used to group parameters in tables.Towns ProtocolTowns Protocol is an open, decentralized messaging protocol built on Base. Builders integrate via first-par...Apache Thrift Server APIThe Thrift Server API provides server implementations for hosting Thrift services including TSimpleServer (...Ricoh USA Protocol APICore OSC protocol endpointsLiteLLM MCP APIProvides /mcp endpoints for Model Context Protocol (MCP) integration, enabling LLMs to interact with extern...Opentrons Python Protocol APIThe Opentrons Python Protocol API is an open-source Python framework for writing automated biology lab prot...Superform Protocol APIThe Protocol API from Superform — 3 operation(s) for protocol.Labguru Protocols APIThe Protocols API from Labguru — 2 operation(s) for protocols.Origin Protocol APIThe protocol API from Origin Protocol — 8 operation(s) for protocol.AMQPAdvanced Message Queuing Protocol. AMQP 1.0 is both an OASIS standard and an International Standard (ISO/IE...MQTTOASIS standard messaging protocol for the Internet of Things. Lightweight publish/subscribe transport for r...STOMPSimple (or Streaming) Text Oriented Messaging Protocol. Lightweight, text-based wire protocol for message-o...docomo Mail IMAP InterfaceThe docomo Mail IMAP interface is the one machine-interface specification NTT DOCOMO publishes openly, with...Tezos Protocols APIThe Protocols API from Tezos — 6 operation(s) for protocols.TzKT Governance APIThe Governance API exposes Tezos on-chain governance data including voting periods, proposals, ballots, and...TzKT Protocols APIThe Protocols API returns metadata for each Tezos protocol version including hash, first and last cycle, co...Monad Machine Payments ProtocolProtocol specification for programmable machine-to-machine payments on Monad, including account, channel, a...Sommelier Protocol APIProtocol-wide metrics such as total value locked.Cucumber MessagesProtocol-buffer / JSON Schema specification of the messages exchanged between Cucumber components (parsers,...MCP SpecificationThe authoritative protocol definition for the Model Context Protocol, maintained at modelcontextprotocol.io...Messari Protocols APIThe Protocols API from Messari — 5 operation(s) for protocols.
Emerging 12 Early or largely undocumented
Filecoin Protocol Actor APIBuilt-in actor method interface exposed through Filecoin Virtual Machine (FVM). Covers Account, Datacap, Mi...Yarn ProtocolsYarn supports a rich set of dependency protocols beyond `npm:` semver — `git:`, `github:`, `file:`, `link:`...Eclipse RDF4J Protocol APIProtocol version of the server.Bloomberg Open API (BLPAPI)Bloomberg's proprietary socket-based API protocol for accessing Bloomberg data, providing a high-performanc...APEX — Adaptive Payload EXchangeAPEX is Neros Technologies' open, MIT-licensed plug-and-play protocol for connecting drone platforms (hosts...Helium Protobuf DefinitionsCanonical protocol buffer definitions for Helium message formats used across packet routing, oracles, and r...MQTT Version 3.1.1 ProtocolPrevious OASIS Standard version of MQTT, still widely deployed across IoT brokers, devices, and cloud platf...MQTT Version 5.0 ProtocolOASIS Standard publish/subscribe messaging protocol for IoT and M2M communication. MQTT v5.0 defines the wi...Aave V4 Protocol (Smart Contracts)Next-generation Aave V4 protocol implementation with unified liquidity layer, hub-and-spoke architecture, a...Cap'n Proto RPC ProtocolCap'n Proto's RPC protocol is a capability-based RPC layer that supports promise pipelining, object referen...RTSP ProtocolThe Real-Time Streaming Protocol (RTSP) is a stateful protocol defined in RFC 2326 (1.0) and RFC 7826 (2.0)...IANA Protocol RegistriesThe IANA Protocol Registries publish the authoritative assignments for Internet protocol parameters. Bulk r...
Minimal 2 Almost no public developer surface
Companies reaching this through an API (46)
These companies publish an API, specification or operation carrying “Protocol” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Apache Thrift
Atomadic Tech
Bloomberg Proprietary Technologies
Cambio Healthcare Systems
Cenevo
Cisco Umbrella
Collaborative Drug Discovery
Cucumber
DeBank
Delta Lake
Delx
Dyno
Eclipse RDF4J
Euler Finance
Events
Filecoin
Fluentd
Golioth
Helium Network
Interhyp
Labguru
Leia
LiteLLM
Match It Up
Materials Zone
Messari
Microsoft Active Directory
Model Context Protocol (MCP)
Monad
NTT Docomo
OpenLDAP
Opentrons
Orca
Origin Protocol
Pocket Network
Postfix
Ricoh USA
Signal
Sommelier
SSSNACK
Superform
TetraScience
Tezos
Vaultfire Protocol
XGuard
Yarn
Score breakdown
Frequency
55.5
log-scaled weighted occurrences
Breadth
0.5
spread across providers
Quality lift
18.7
mean composite of providers using it
Cohesion
3.1
strength of nearest seed neighbor
Related tags
RPC 5 co-occurrences
Standards 5 co-occurrences
Schema 6 co-occurrences
Tools 5 co-occurrences
x402 5 co-occurrences
DeFi 7 co-occurrences
A2A 9 co-occurrences
A2A Verified 7 co-occurrences
Where this tag comes from
Provider tag23
Api tag59
Openapi tag24
Openapi op tag95
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.