Uberduck website screenshot

Uberduck

Uberduck is an AI voice platform whose public REST API converts text into natural-sounding speech across a catalog of voices and provider-backed models (AWS Polly, Google Cloud, Azure), lists and filters those voices, creates instant zero-shot voice clones from reference audio, and mints LiveKit tokens for real-time conversational AI voice calls. The API is HTTPS request/response with Bearer API-key authentication. It is self-serve but gated behind a paid plan - API access is a feature of the Creator plan and above. Uberduck's earlier AI music / rap-vocals API surface is no longer part of the published API; the current documented product (OpenAPI version 0.1.0) is focused on text-to-speech, voices, and conversational voice.

Uberduck publishes 4 APIs on the APIs.io network, including Conversational API, Models API, Text-to-Speech API, and 1 more. Tagged areas include Artificial Intelligence, Text-to-Speech, TTS, Voice, and Voice Cloning.

Uberduck’s developer surface includes authentication, documentation, API reference, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.0/100 thin ▬ flat Agent 20/100 agent aware Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0
AccessPaid
1 published contract
Artificial IntelligenceText-to-SpeechTTSVoiceVoice CloningSpeech SynthesisConversational AI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0
Composite quality — 35.0/100 · thin
Contract Quality 9.7 / 19
Developer Ergonomics 4.5 / 15
Access Clarity 5.4 / 15
Operational Transparency 2.8 / 10
Contract Governance 0.0 / 9
Discoverability 5.0 / 8
Regulatory Posture 1.6 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/uberduck: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Uberduck Conversational API

Mint LiveKit tokens for real-time conversational AI voice calls.

Uberduck Models API

List available text-to-speech models by provider.

Uberduck Text-to-Speech API

Synthesize speech from text using a chosen voice and model.

Uberduck Voices API

List, filter, and clone voices.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Uberduck Text To Speech Conversational API

OPEN COLLECTION

Uberduck Text To Speech Conversational Models API

OPEN COLLECTION

Uberduck Text To Speech Conversational Text-to-Speech API

OPEN COLLECTION

Uberduck Text To Speech Conversational Voices API

OPEN COLLECTION

Uberduck Text To Speech API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Uberduck Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Uberduck Rate Limits

6 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Uberduck Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Uberduck Authentication

http · 1 scheme

SECURITY

Uberduck Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Uberduck Agentic Access

5 operations · 3 acting

5 operations · 3 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: uberduck
url: https://raw.githubusercontent.com/api-evangelist/uberduck/refs/heads/main/apis.yml
name: Uberduck
kind: company
description: Uberduck is an AI voice platform whose public REST API converts text into natural-sounding speech across a catalog
  of voices and provider-backed models (AWS Polly, Google Cloud, Azure), lists and filters those voices, creates instant zero-shot
  voice clones from reference audio, and mints LiveKit tokens for real-time conversational AI voice calls. The API is HTTPS
  request/response with Bearer API-key authentication. It is self-serve but gated behind a paid plan - API access is a feature
  of the Creator plan and above. Uberduck's earlier AI music / rap-vocals API surface is no longer part of the published API;
  the current documented product (OpenAPI version 0.1.0) is focused on text-to-speech, voices, and conversational voice.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/uberduck.png
tags:
- Artificial Intelligence
- Text-to-Speech
- TTS
- Voice
- Voice Cloning
- Speech Synthesis
- Conversational AI
tags_raw:
- AI
- Text to Speech
- TTS
- Voice
- Voice Cloning
- Speech Synthesis
- Conversational AI
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.23'
apis:
- aid: uberduck:uberduck-conversational-api
  name: Uberduck Conversational API
  description: Mint LiveKit tokens for real-time conversational AI voice calls.
  humanURL: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  baseURL: https://api.uberduck.ai/v1
  tags:
  - Conversational AI
  tags_raw:
  - Conversational
  properties:
  - type: OpenAPI
    url: openapi/uberduck-conversational-api-openapi.yml
  - type: Documentation
    url: https://docs.uberduck.ai/guides/text-to-speech
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  - type: PostmanCollection
    url: collections/uberduck.postman_collection.json
  - type: OpenCollection
    url: collections/uberduck.opencollection.json
  - type: Documentation
    url: https://docs.uberduck.ai/guides/voice-selection
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/endpoints/models
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/uberduck-text-to-speech-api
- aid: uberduck:uberduck-models-api
  name: Uberduck Models API
  description: List available text-to-speech models by provider.
  humanURL: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  baseURL: https://api.uberduck.ai/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/uberduck-models-api-openapi.yml
  - type: Documentation
    url: https://docs.uberduck.ai/guides/text-to-speech
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  - type: PostmanCollection
    url: collections/uberduck.postman_collection.json
  - type: OpenCollection
    url: collections/uberduck.opencollection.json
  - type: Documentation
    url: https://docs.uberduck.ai/guides/voice-selection
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/endpoints/models
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/uberduck-text-to-speech-api
- aid: uberduck:uberduck-text-to-speech-api
  name: Uberduck Text-to-Speech API
  description: Synthesize speech from text using a chosen voice and model.
  humanURL: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  baseURL: https://api.uberduck.ai/v1
  tags:
  - Text-to-Speech
  properties:
  - type: OpenAPI
    url: openapi/uberduck-text-to-speech-api-openapi.yml
  - type: Documentation
    url: https://docs.uberduck.ai/guides/text-to-speech
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  - type: PostmanCollection
    url: collections/uberduck.postman_collection.json
  - type: OpenCollection
    url: collections/uberduck.opencollection.json
  - type: Documentation
    url: https://docs.uberduck.ai/guides/voice-selection
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/endpoints/models
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/uberduck-text-to-speech-api
- aid: uberduck:uberduck-voices-api
  name: Uberduck Voices API
  description: List, filter, and clone voices.
  humanURL: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  baseURL: https://api.uberduck.ai/v1
  tags:
  - Voice
  tags_raw:
  - Voices
  properties:
  - type: OpenAPI
    url: openapi/uberduck-voices-api-openapi.yml
  - type: Documentation
    url: https://docs.uberduck.ai/guides/text-to-speech
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/text-to-speech-v-1-text-to-speech-post
  - type: PostmanCollection
    url: collections/uberduck.postman_collection.json
  - type: OpenCollection
    url: collections/uberduck.opencollection.json
  - type: Documentation
    url: https://docs.uberduck.ai/guides/voice-selection
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/endpoints/models
  - type: APIReference
    url: https://docs.uberduck.ai/api-reference/uberduck-text-to-speech-api
common:
- type: AgenticAccess
  url: agentic-access/uberduck-agentic-access.yml
- type: DomainSecurity
  url: security/uberduck-domain-security.yml
- type: Authentication
  url: authentication/uberduck-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/uberduck-ai
- type: Website
  url: https://uberduck.ai
- type: Documentation
  url: https://docs.uberduck.ai
- type: APIReference
  url: https://api.uberduck.ai/docs
- type: Plans
  url: plans/uberduck-plans-pricing.yml
- type: RateLimits
  url: rate-limits/uberduck-rate-limits.yml
- type: FinOps
  url: finops/uberduck-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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