Google Cloud Text-To-Speech

Google Cloud Text-to-Speech converts text or Speech Synthesis Markup Language (SSML) input into audio data of natural human speech. It provides access to hundreds of voices across multiple languages and variants, powered by DeepMind's WaveNet technology and Google's neural network models.

Google Cloud Text-To-Speech publishes 2 API contracts indexed on the APIs.io network: Text:synthesize API and Voices API. Tagged areas include Audio, Google Cloud, Machine Learning, Speech Synthesis, and Text-to-Speech.

The Google Cloud Text-To-Speech catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Google Cloud Text-To-Speech’s developer surface includes developer portal, getting-started guide, documentation, authentication, pricing, support, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.6/100 developing ▬ flat Agent 18/100 agent aware saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemium

1 published contract

Audio Google Cloud Machine Learning Speech Synthesis Text-to-Speech

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 43.6/100 · developing

Contract Quality 10.1 / 19

Developer Ergonomics 7.7 / 15

Access Clarity 5.9 / 15

Operational Transparency 2.6 / 10

Contract Governance 0.9 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.2 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 18/100 · 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 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/.

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/google-cloud-text-to-speech: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Speech and Voice AI	covered	34.5 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 2

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

Google Cloud Text-To-Speech Text:synthesize API

The Text:synthesize API from Google Cloud Text-To-Speech — 1 operation(s) for text:synthesize.

Google Cloud Text-To-Speech Voices API

The Voices API from Google Cloud Text-To-Speech — 1 operation(s) for voices.

Postman Collections 2

Ready-to-run Postman collections for exercising this provider's APIs.

Google Cloud Text-to-Speech Text:synthesize API

POSTMAN

Google Cloud Text-to-Speech Text:synthesize Voices API

POSTMAN

Open Collections 4

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

API Collection

OPEN COLLECTION

Google Cloud Text-to-Speech Text:synthesize API

OPEN COLLECTION

Google Cloud Text-to-Speech Text:synthesize Voices API

OPEN COLLECTION

Google Cloud Text-to-Speech API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Text To Speech Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Text To Speech Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Cloud Text To Speech Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

context Context

13 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Cloud Text-To-Speech — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Speech Synthesis Request

3 properties

JSON SCHEMA

Security Posture 2

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

Google Cloud Text To Speech Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud Text To Speech Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Google Cloud Text To Speech Agentic Access

2 operations · 1 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: google-cloud-text-to-speech
name: Google Cloud Text-To-Speech
description: Google Cloud Text-to-Speech converts text or Speech Synthesis Markup Language (SSML) input into audio data of
  natural human speech. It provides access to hundreds of voices across multiple languages and variants, powered by DeepMind's
  WaveNet technology and Google's neural network models.
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-cloud-text-to-speech.png
url: https://raw.githubusercontent.com/api-evangelist/google-cloud-text-to-speech/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
tags:
- Audio
- Google Cloud
- Machine Learning
- Speech Synthesis
- Text-to-Speech
tags_raw:
- Audio
- Google Cloud
- Machine Learning
- Speech Synthesis
- Text-To-Speech
- Machine-Learning
apis:
- aid: google-cloud-text-to-speech:google-cloud-text-to-speech-text-synthesize-api
  name: Google Cloud Text-To-Speech Text:synthesize API
  description: The Text:synthesize API from Google Cloud Text-To-Speech — 1 operation(s) for text:synthesize.
  humanURL: https://cloud.google.com/text-to-speech
  baseURL: https://texttospeech.googleapis.com
  tags:
  - Text:synthesize
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-text-to-speech-text-synthesize-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/text-to-speech/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/text-to-speech/docs/quickstart-client-libraries
  - type: JSONSchema
    url: json-schema/speech-synthesis.json
  - type: JSONLD
    url: json-ld/context.jsonld
- aid: google-cloud-text-to-speech:google-cloud-text-to-speech-voices-api
  name: Google Cloud Text-To-Speech Voices API
  description: The Voices API from Google Cloud Text-To-Speech — 1 operation(s) for voices.
  humanURL: https://cloud.google.com/text-to-speech
  baseURL: https://texttospeech.googleapis.com
  tags:
  - Voice
  tags_raw:
  - Voices
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-text-to-speech-voices-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/text-to-speech/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/text-to-speech/docs/quickstart-client-libraries
  - type: JSONSchema
    url: json-schema/speech-synthesis.json
  - type: JSONLD
    url: json-ld/context.jsonld
common:
- type: Plans
  url: plans/google-cloud-text-to-speech-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-cloud-text-to-speech-rate-limits.yml
- type: FinOps
  url: finops/google-cloud-text-to-speech-finops.yml
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-cloud-text-to-speech/overview
- type: AgenticAccess
  url: agentic-access/google-cloud-text-to-speech-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-text-to-speech-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-text-to-speech-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/GoogleCloudPlatform
- type: Portal
  url: https://cloud.google.com/text-to-speech
- type: GettingStarted
  url: https://cloud.google.com/text-to-speech/docs/quickstart-client-libraries
- type: Documentation
  url: https://cloud.google.com/text-to-speech/docs
- type: Authentication
  url: https://cloud.google.com/docs/authentication
- type: Pricing
  url: https://cloud.google.com/text-to-speech/pricing
- type: TermsOfService
  url: https://cloud.google.com/terms
- type: PrivacyPolicy
  url: https://policies.google.com/privacy
- type: StatusPage
  url: https://status.cloud.google.com/
- type: Support
  url: https://cloud.google.com/text-to-speech/docs/support
- type: JSONLD
  url: json-ld/context.jsonld
- type: Integrations
  url: https://cloud.google.com/marketplace
- url: https://cloud.google.com/feeds/tts-release-notes.xml
  type: Blog
integrations:
- name: Become a Partner
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: google-cloud-platform
x-relationship: product

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