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 API contracts indexed 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, Voice, Voice Cloning, and Speech Synthesis.

The Uberduck catalog on APIs.io includes 1 Spectral governance ruleset.

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

🌐 Visit website 📡 Profile data on GitHub

28.6/100 thin ▬ flat Agent 20/100 agent aware Front door AI 4/6 moderate Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract

Artificial Intelligence Text-to-Speech Voice Voice Cloning Speech Synthesis Conversational AI

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 28.6/100 · thin

Contract Quality 10.7 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 1.0 / 15

Operational Transparency 0.7 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 0.8 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics 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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 32.1 — up to +13.6 composite points Ask about this →
Operational Transparency scores 7.1 — up to +12.1 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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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 the provider profile at artifacts.apis.io/uberduck/apis.yml: open an issue on github.com/api-evangelist/uberduck to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

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 5

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

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

Uberduck API pricing

Not yet checked against Uberduck's own pricing page. Compiled by API Evangelist on 2026-07-11 from www.uberduck.ai/pricing; confirm before you rely on a figure.

Plan	Price
Starter paid	—
Creator paid	—
Pro paid	—
Enterprise / Custom enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Requests Per Minute: 5 per minute requests
Free Tier Requests Per Day: 100 per day requests
Pro Tier Requests Per Minute: 60 per minute requests

Compiled by API Evangelist, not yet checked against Uberduck's documentation. All 6 limits →

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

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Uberduck API Rules

58 rules · 56 error-severity 1 warn-severity 1 info-severity

SPECTRAL

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 (API Evangelist recommendations) 1

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

Uberduck Agentic Access

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 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Source (apis.yml)

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: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/uberduck.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
x-docs-hosting: vercel
tags:
- Artificial Intelligence
- Text-to-Speech
- 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: '2026-10-06'
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:
- url: https://www.uberduck.ai/blog
  type: Blog
- 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

Uberduck API — frequently asked questions

Does Uberduck have an API?

Yes. APIs.io lists 4 APIs from Uberduck, including Uberduck Conversational API, Uberduck Models API and Uberduck Text-to-Speech API, and 1 more.

Is there an OpenAPI specification for the Uberduck API?

Yes. APIs.io indexes 4 OpenAPI specifications for Uberduck, each linked for download from this page.

How do I authenticate with the Uberduck API?

Uberduck uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Uberduck Authentication.

How much does the Uberduck API cost?

APIs.io lists 4 pricing plans for Uberduck, with each plan's price, limits and inclusions under Pricing on this page.

Is the Uberduck API ready for AI agents?

Uberduck has a Kin Score of 28.6 out of 100 (thin) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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