Open Standard
Providers using this tag (8)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 1 Usable, with meaningful gaps to close
Thin 5 Limited public surface area
Emerging 2 Early or largely undocumented
APIs with this tag (15)
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 →
Strong 1 Solid coverage with minor gaps
Developing 9 Usable, with meaningful gaps to close
Agent2Agent (A2A)Agent2Agent (A2A) is an open protocol that lets AI agents built by different organisations, on different fr...AGENTS.mdAGENTS.md is a simple, universal convention that gives AI coding agents a consistent, predictable source of...Model Context Protocol (MCP)The Model Context Protocol (MCP) is an open JSON-RPC 2.0 standard for connecting AI applications to externa...Official MCP Registry APIThe Official MCP Registry is the community registry service for Model Context Protocol servers, run by the ...FDC3 App Directory APIThe FDC3 App Directory (AppD) is a REST API standard for registering and discovering financial desktop appl...FDC3 Context DataFDC3 Context Data defines a standard set of typed data structures used to carry information between financi...FDC3 Desktop Agent APIThe FDC3 Desktop Agent API is the primary interface for application interoperability on the financial deskt...FDC3 Desktop Agent BridgingFDC3 Desktop Agent Bridging (DAB) is a wire protocol that enables multiple Desktop Agent implementations to...FDC3 IntentsFDC3 Intents are standardized verbs that applications use to request functionality from other applications ...
Thin 4 Limited public surface area
FAU Matrix HomeserverFAU operates a Matrix homeserver — Synapse 1.159.0 at matrix.fau.de — with a hosted Element web client at c...Common Cloud ControlsFINOS Common Cloud Controls is an open standard project that describes consistent controls for compliant pu...Common Domain ModelThe Common Domain Model (CDM) is a standardized, machine-readable, and machine-executable model that repres...FDC3FDC3 is an open standard for financial desktop interoperability, defining how applications launch, share co...
Emerging 1 Early or largely undocumented
Companies reaching this through an API (5)
These companies publish an API, specification or operation carrying “Open Standard” 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.
Score breakdown
Frequency
36.3
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
33.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor
Where this tag comes from
Api tag15
Provider tag8
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.