Google Cloud Text-To-Speech website screenshot

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.

51.3/100 developing ▬ flat Agent 18/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessPaid
1 published contract
AudioGoogle CloudMachine LearningSpeech SynthesisText-to-Speech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
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
  • 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)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
9 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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.
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/google-cloud-text-to-speech/apis.yml: open an issue on github.com/api-evangelist/google-cloud-text-to-speech 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 →

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.

MarketPositionDepthRegistered MCP serverDeclares 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.

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.

measured — observed by APIs.io (published)

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.

Open Collections 3

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

Google Cloud Text-To-Speech API pricing

Prices published by Google Cloud Text-To-Speech, read 2026-10-28 from cloud.google.com/text-to-speech/pricing.

PlanPrice
Gemini 3.8 Flash TTS (Preview) through December 31, 2026 Input tokens: $0.50 per 1 million text tokens* (sku: 4CB8-5200-1246). Output tokens: $9.00
Includes: Not available
Gemini 3.8 Flash TTS (Preview) starting January 1, 2027 Input tokens: $1.00 per 1 million text tokens* (sku: 4CB8-5200-1246). Output tokens: $18.0
Includes: Not available
Gemini 3.8 Flash-Lite TTS (Preview) through December 31, 2026 Input tokens: $0.50 per 1 million text tokens* (sku: 6D6B-51EE-87C4). Output tokens: $6.00
Includes: Not available
Gemini 3.8 Flash-Lite TTS (Preview) starting January 1, 2027 Input tokens: $1.00 per 1 million text tokens* (sku: 6D6B-51EE-87C4). Output tokens: $12.0
Includes: Not available
Gemini 2.5 Flash TTS / Gemini 2.5 Flash-Lite Preview TTS Input tokens: $0.50 per 1 million text tokens* (sku: 242A-EA16-C1EC) Output tokens: $10.00
Includes: Not available
Gemini 3.1 Flash TTS (Preview) Input tokens: $1.00 per 1 million text tokens* (sku: EB3F-1051-05D7) Output tokens: $20.00
Includes: Not available
Gemini 2.5 Pro TTS Input tokens: $1.00 per 1 million text tokens* (sku: 8FF1-7E5B-5BB7) Output tokens: $20.00
Includes: Not available
Chirp 3: HD voices US$0.00003 per character (US$30 per 1 million characters)
Includes: 0 to 1 million characters

All 14 plans, limits and sources →

Rate limits

Compiled by API Evangelist, not yet checked against Google Cloud Text-To-Speech's documentation. All 5 limits →

Billed by: 1 million tokens · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

FinOps 1

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

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

2 operations · 1 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Build 2

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 5

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  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

Google Cloud Text-To-Speech API — frequently asked questions

Does Google Cloud Text-To-Speech have an API?

Yes. APIs.io lists 2 APIs from Google Cloud Text-To-Speech, including Google Cloud Text-To-Speech Text:synthesize API and Google Cloud Text-To-Speech Voices API.

Is there an OpenAPI specification for the Google Cloud Text-To-Speech API?

Yes. APIs.io indexes 2 OpenAPI specifications for Google Cloud Text-To-Speech, each linked for download from this page.

How do I authenticate with the Google Cloud Text-To-Speech API?

Google Cloud Text-To-Speech uses bearer-token authentication.

How much does the Google Cloud Text-To-Speech API cost?

Google Cloud Text-To-Speech publishes its prices; its Gemini 3.8 Flash TTS (Preview) through December 31, 2026 plan is Input tokens: $0.50 per 1 million text tokens* (sku: 4CB8-5200-1246). Output tokens: $9.00 as of 2026-10-28. APIs.io lists 14 pricing plans for Google Cloud Text-To-Speech, with each plan's price, limits and inclusions under Pricing on this page.

Is the Google Cloud Text-To-Speech API ready for AI agents?

Google Cloud Text-To-Speech has a Kin Score of 51.3 out of 100 (developing) and an Agent Readiness score of 17.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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