KugelAudio
KugelAudio is a Y Combinator-backed, Germany-based voice AI company (KugelAudio GmbH) offering low-latency text-to-speech built, trained, and hosted entirely in the European Union. Its kugel-3 and kugel-2-turbo models produce natural speech in 26+ languages with accent and dialect coverage, voice cloning from a short reference sample, per-project pronunciation dictionaries with IPA support, word-level timestamps, and inline break, spell, and prosody tags. The platform positions EU data sovereignty as its core differentiator, operating outside the reach of the US CLOUD Act and offering a direct EU endpoint plus on-premise and dedicated deployment. The developer surface is a REST API for generation, voices, models, and dictionaries plus three WebSocket streaming channels tuned for real-time voice agents, including token-by-token input, barge-in, and up to 20 concurrent contexts per connection. Drop-in compatibility surfaces let ElevenLabs-compatible SDKs, LiveKit, PipeCat, and Vapi integrations point at KugelAudio without rewrites.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles KugelAudio the way a machine reads it — 17 machine-readable artifacts across 14 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — KugelAudio scores 49.4/100 (developing), with a separate agent-readiness read of 49/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile KugelAudio
Each block below is one kind of artifact we hold for KugelAudio. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 14
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
KugelAudio 11labs API
The 11labs API from KugelAudio — 6 operation(s) for 11labs.
KugelAudio Audio API
The Audio API from KugelAudio — 1 operation(s) for audio.
KugelAudio billing API
The billing API from KugelAudio — 2 operation(s) for billing.
KugelAudio Dictionaries API
The Dictionaries API from KugelAudio — 5 operation(s) for dictionaries.
KugelAudio Health API
The Health API from KugelAudio — 1 operation(s) for health.
KugelAudio license API
The license API from KugelAudio — 12 operation(s) for license.
KugelAudio Models API
The Models API from KugelAudio — 1 operation(s) for models.
KugelAudio Normalize API
The Normalize API from KugelAudio — 1 operation(s) for normalize.
KugelAudio Post Overrides API
The Post Overrides API from KugelAudio — 1 operation(s) for post overrides.
KugelAudio Predict API
The Predict API from KugelAudio — 1 operation(s) for predict.
KugelAudio Ready API
The Ready API from KugelAudio — 1 operation(s) for ready.
KugelAudio Tts API
The Tts API from KugelAudio — 1 operation(s) for tts.
KugelAudio Vapi API
The Vapi API from KugelAudio — 1 operation(s) for vapi.
KugelAudio Voices API
The Voices API from KugelAudio — 6 operation(s) for voices.
Scroll within the panel for all 14 ·
Event Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
KugelAudio TTS Streaming API
API Evangelist description of KugelAudio's documented WebSocket streaming surface. KugelAudio publishes no AsyncAPI document of its own; this file is GENERATED from the provider...
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for KugelAudio — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 4
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type
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