KYE Protocol ecosystem · one orientation, four surfaces

Profiles define. Connectors integrate. Apps productise. Plugins extend.

KYE Protocol ships four ecosystem surfaces. Each one solves a specific adoption problem. Pick the one that matches what you're trying to do; the right starter, schema, and SDK is one click away.

Four ecosystem surfaces

One sentence per surface.

Hierarchy

From Core Protocol to Plugin — one tree.

Five layers, each a clean contract over the layer below. The same authority object travels from spec to runtime to evidence.

  1. L1L1KYE Core Protocol — vocabulary, schemas, runtime, decision codes, audit chain. The base contract.
  2. L2L2KYE Profiles — domain rules: kye.payments.v1, kye.healthcare.v1, kye.federation.v1, etc. (36 v1.0 + 5 v1.1 preview)
  3. L3L3KYE Connector Profiles — integration-category rules. Each profile binds a family of connectors to a shared authority model + event family + evidence shape + conformance suite.
  4. L4L4Individual connectors — specific systems (Stripe, Shopify, OpenBankProject, NHS API, Splunk, …) under their parent profile.
  5. L5L5Apps · Plugins · Widgets — KYE App Store productises · KYE Plugin Marketplace extends.
KYE Core Protocol™
  └── kye.payments.v1 (KYE Profile)
        └── KYE Payment Profile™ (Connector Profile)
              ├── KYE IPG / MPG Connector™
              ├── KYE Stripe Connector™
              ├── KYE PayPal Connector™
              └── KYE Open-Banking Payment-Initiation Connector™
                    │
                    └── KYE Payment Authority Gateway™  (App)
                          └── KYE Webhook Verifier Plugin™  (Plugin)
Pick the surface that matches the job

What are you trying to do?

  • AI want to understand the rules for my domain.KYE Connector Profiles. Pick the profile that fits (Payment, Commerce, Open Finance, Health, Pension, Agent Runtime, Compliance Evidence, Security & SIEM, Insurance, Utilities, Legal). Each profile lists the authority model, the events it carries, the conformance fixtures.
  • BI want to integrate KYE with a specific system I already run.KYE Connector Hub. Search the explorer by name / type / risk envelope. Pick a connector; ship the manifest; sign + submit.
  • CI want a production-ready app I can deploy this quarter.KYE App Store. 21 apps across payments, commerce, open finance, sandbox, sector apps, agentic / MCP, audit, certification, legal.
  • DI want to add a small focused module to my existing KYE stack.KYE Plugin Marketplace. MCP tools, webhook verifiers, policy packs, evidence exporters, dashboard widgets — ~half a day of work each.
  • EI want to write code against the runtime.Build with KYE + Developer quickstart. Three SDKs (TypeScript / Python / Go), 38 conformance fixtures, reference Gateway, KYE MCP Server.
  • FI want to see the runtime semantics live before I write anything.Interactive Widgets. Six live widgets, no signup, no install — agent-purchase simulator, Decision Map viewer, Connector Hub explorer, Blast Radius Map, Evidence Pack Viewer, Choose-Your-Role router.
OSS / paid split, ecosystem-wide

Open contracts. Paid operations.

SurfaceOpen source · Apache 2.0KYE Cloud · commercial
ProfilesEvery kye.connector_profile.v1 manifest, supported-connector list, conformance suite, dictionaries.Sector-specific profile bundles · regulated-industry presets.
ConnectorsEvery kye.connector_manifest.v1 beneath a profile · sample IPG / checkout / MCP / SIEM connectors · SDK adapters · local test harness.Managed Connector Hub · enterprise connector engine · SLA-backed delivery · connector health monitoring.
AppsReference architectures · sample kye.app_manifest.v1 · SDK examples per app.Hosted apps in KYE App Store — KYE Payment Authority Gateway, KYE Checkout Guard, KYE Evidence Pack Viewer Pro, etc.
Pluginskye.plugin_manifest.v1 · sample plugins · permissions dictionary · conformance fixtures.Hosted KYE Plugin Marketplace · install / monitor / replay UI.
RuntimeReference Gateway: PEP middleware · embedded ePDP · conformance runner.Managed runtime gateway, decision engine, state engine, graph engine, signal bus, evidence engine, dashboards.

Why this split? The contracts have to be open or KYE Protocol isn't a protocol — partners and developers must be able to implement, integrate, and verify without depending on a hosted service. The runtime engine that scales decisions, signal delivery, and connector operations sits behind a paid layer where the operational moat lives.

Adjacent reading

Where to go next.