{ "name": "Google Cloud Text-to-Speech", "slug": "google-text-to-speech", "website_url": "https://cloud.google.com/text-to-speech", "vendor_description": "\"Cloud Text-to-Speech converts text or Speech Synthesis Markup Language (SSML) input into audio data of natural human speech.\"", "categories": [ "text-to-speech" ], "summary": "Google Cloud Text-to-Speech converts text or SSML input into natural-sounding audio, targeting voice agents, IVR systems, audiobook narration, accessibility tools, and real-time conversational AI. It offers a generous free tier (up to 4 million characters per month for Standard voices, 1 million for WaveNet and Neural2), with paid tiers starting at $4 per million characters on a self-serve, usage-based model. The API ships SDKs for eight languages, supports streaming and long-form synthesis, and carries SOC 2 Type 2, HIPAA, GDPR, and ISO 27001 certifications with a published SLA.", "capabilities": { "supported_actions": [ "synthesize_speech", "streaming_tts", "long_audio_synthesis", "ssml_support", "instant_voice_cloning", "multilingual_synthesis", "multi_speaker_markup", "word_timestamps", "custom_pronunciations", "speaking_rate_control", "pitch_control", "volume_control", "list_voices", "async_long_audio_synthesis", "multi_speaker_audio" ], "supported_regions": [ "global", "us (multi-region)", "eu (multi-region)", "us-central1", "asia-northeast1 (Tokyo)", "australia-southeast1 (Sydney)", "asia-south1 (Mumbai)", "asia-southeast1 (Singapore)", "asia-northeast3 (Seoul)", "europe-west2 (London)", "europe-west3 (Frankfurt)", "europe-west4 (Netherlands)", "northamerica-northeast1" ], "supported_languages": [ "Afrikaans (af-ZA)", "Arabic (ar-XA)", "Basque (eu-ES)", "Bengali (bn-IN)", "Bulgarian (bg-BG)", "Catalan (ca-ES)", "Chinese - Hong Kong (yue-HK)", "Croatian (hr-HR)", "Czech (cs-CZ)", "Danish (da-DK)", "Dutch - Belgium (nl-BE)", "Dutch - Netherlands (nl-NL)", "English - Australia (en-AU)", "English - India (en-IN)", "English - UK (en-GB)", "English - US (en-US)", "Estonian (et-EE)", "Filipino (fil-PH)", "Finnish (fi-FI)", "French - Canada (fr-CA)", "French - France (fr-FR)", "Galician (gl-ES)", "German (de-DE)", "Greek (el-GR)", "Hebrew (he-IL)", "Hindi (hi-IN)", "Hungarian (hu-HU)", "Indonesian (id-ID)", "Italian (it-IT)", "Japanese (ja-JP)", "Korean (ko-KR)", "Latvian (lv-LV)", "Lithuanian (lt-LT)", "Mandarin Chinese (cmn-CN)", "Mandarin Chinese - Taiwan (cmn-TW)", "Norwegian (nb-NO)", "Polish (pl-PL)", "Portuguese - Brazil (pt-BR)", "Portuguese - Portugal (pt-PT)", "Punjabi - India (pa-IN, Preview)", "Romanian (ro-RO)", "Russian (ru-RU)", "Serbian (sr-RS)", "Slovak (sk-SK)", "Slovenian (sl-SI)", "Spanish - Spain (es-ES)", "Spanish - US (es-US)", "Swedish (sv-SE)", "Thai (th-TH)", "Turkish (tr-TR)", "Ukrainian (uk-UA)", "Vietnamese (vi-VN)", "80+ languages and variants via Gemini-TTS models" ], "input_types": [ "plain text", "SSML" ], "output_types": [ "MP3", "LINEAR16 (WAV)", "OGG_OPUS", "MULAW", "ALAW", "PCM", "streaming audio chunks" ], "webhooks_supported": false, "sandbox_available": false, "sdk_languages": [ "Python", "Node.js", "Java", "Go", "C#", "PHP", "Ruby", "C++" ], "mcp_server_available": false }, "integration": { "api_style": "rest", "base_url": "https://texttospeech.googleapis.com", "api_version": "v1", "versioning_scheme": "url", "stability": "ga", "deprecation_policy_url": "https://cloud.google.com/terms/deprecation", "auth_methods": [ "api_key", "oauth2" ], "auth_docs_url": "https://docs.cloud.google.com/text-to-speech/docs/authentication", "idempotency_supported": false, "error_format": "vendor-specific", "webhook_signing": null, "webhook_events_url": null, "rate_limit_requests": 1000, "rate_limit_window": "minute", "sdk_packages": [ { "package": "google-cloud-texttospeech", "language": "Python", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-python/tree/main/packages/google-cloud-texttospeech" }, { "package": "@google-cloud/text-to-speech", "language": "Node.js", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-node/tree/main/packages/google-cloud-texttospeech" }, { "package": "com.google.cloud:google-cloud-texttospeech", "language": "Java", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-java/tree/main/java-texttospeech" }, { "package": "cloud.google.com/go/texttospeech/apiv1", "language": "Go", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-go" }, { "package": "Google.Cloud.TextToSpeech.V1", "language": "C#", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-dotnet" }, { "package": "google/cloud-text-to-speech", "language": "PHP", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-php" }, { "package": "google-cloud-text_to_speech", "language": "Ruby", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-ruby" }, { "package": null, "language": "C++", "official": true, "repo_url": "https://github.com/googleapis/google-cloud-cpp" } ], "mcp_url": null, "quickstart_url": "https://docs.cloud.google.com/text-to-speech/docs/create-audio-text-client-libraries" }, "pricing": { "pricing_model": "usage_based", "has_published_pricing": true, "starting_price_usd": "4.0000", "price_basis": "1M characters", "free_tier_available": true, "free_tier_limit": "4 million characters/month (Standard voices); 1 million characters/month (WaveNet, Neural2, Studio, Chirp3 HD voices)", "free_tier_details": "Recurring monthly free allowance: 4 million characters/month for Standard voices; 1 million characters/month for WaveNet voices; 1 million characters/month for Neural2, Studio, and Chirp 3 HD voices. Separate one-time $300 trial credit (90 days) is also available but is not part of the recurring free tier.", "minimum_commitment": null, "self_serve_signup": true, "requires_sales_call": false, "requires_verification": true, "enterprise_plan_available": true, "price_points": [ { "plan": "Pay As You Go", "item": "Speech synthesis - Standard voices (free tier)", "amount_usd": "0.0000", "amount_percent": null, "per": "4M characters/month", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Standard voices", "amount_usd": "4.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - WaveNet voices (free tier)", "amount_usd": "0.0000", "amount_percent": null, "per": "1M characters/month", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - WaveNet voices", "amount_usd": "16.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Neural2 voices (free tier)", "amount_usd": "0.0000", "amount_percent": null, "per": "1M characters/month", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Neural2 voices", "amount_usd": "16.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Polyglot voices", "amount_usd": "16.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Chirp 3 HD voices (free tier)", "amount_usd": "0.0000", "amount_percent": null, "per": "1M characters/month", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Chirp 3 HD voices", "amount_usd": "30.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Studio voices (free tier)", "amount_usd": "0.0000", "amount_percent": null, "per": "1M characters/month", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Speech synthesis - Studio voices", "amount_usd": "160.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Instant Custom Voice synthesis (Chirp 3)", "amount_usd": "60.0000", "amount_percent": null, "per": "1M characters", "currency": "USD", "source_url": "https://cloud.google.com/text-to-speech/pricing" }, { "plan": "Pay As You Go", "item": "Gemini 2.5 Flash TTS - input tokens", "amount_usd": "0.3000", "amount_percent": null, "per": "1M tokens", "currency": "USD", "source_url": "https://cloudprice.net/models/google-gemini-2-5-flash-tts-preview" }, { "plan": "Pay As You Go", "item": "Gemini 2.5 Flash TTS - audio output tokens", "amount_usd": "2.5000", "amount_percent": null, "per": "1M tokens", "currency": "USD", "source_url": "https://cloudprice.net/models/google-gemini-2-5-flash-tts-preview" }, { "plan": "Pay As You Go", "item": "Gemini 2.5 Pro TTS - input tokens", "amount_usd": "1.0000", "amount_percent": null, "per": "1M tokens", "currency": "USD", "source_url": "https://cloudprice.net/models/google-gemini-2-5-pro-tts" }, { "plan": "Pay As You Go", "item": "Gemini 2.5 Pro TTS - audio output tokens", "amount_usd": "20.0000", "amount_percent": null, "per": "1M tokens", "currency": "USD", "source_url": "https://cloudprice.net/models/google-gemini-2-5-pro-tts" } ] }, "compliance": { "soc2": "type_2", "hipaa": true, "gdpr": true, "iso_27001": true, "pci_dss": null, "sla_published": true, "sla_url": "https://cloud.google.com/text-to-speech/sla", "data_retention_policy_url": "https://cloud.google.com/terms/cloud-privacy-notice", "documented_rate_limits": "Maximum request size: 5,000 bytes per request (cannot be increased). Requests per minute (RPM) by voice type: Chirp 3 HD: 200 RPM; Chirp Voice Cloning: 30 RPM; Neural2: 1,000 RPM; Polyglot: 1,000 RPM; Studio: 500 RPM; Long Audio Synthesis: 100 RPM; General (all other voices): 1,000 RPM. Concurrent streaming sessions: 100 per project. Voice cloning key generation: 10 requests per minute. Gemini-2.5-flash-tts: 150 QPM; Gemini-2.5-pro-tts: 125 QPM.", "known_restrictions": [ "Cloud TTS does not support all SSML elements for all available languages.", "Instant Voice Cloning (Chirp 3) is currently restricted to allow-listed users; contact sales to request access.", "Voice cloning requires consent audio recording with the statement: 'I am the owner of this voice and I consent to Google using this voice to create a synthetic voice model.'", "Maximum request size of 5,000 bytes cannot be increased.", "Chirp 3: HD voices are out of scope for regionalization and data residency despite being available in eu/us endpoints.", "Reference audio for instant voice cloning must be up to 10 seconds, single-channel, with minimal background noise." ] }, "developer": { "docs_url": "https://docs.cloud.google.com/?hl=zh-tw", "api_reference_url": null, "openapi_spec_url": null, "postman_collection_url": null, "changelog_url": null, "status_page_url": "https://status.cloud.google.com", "llms_txt_url": null, "markdown_docs_url": null, "rendering": "static" }, "adoption": { "launched_at": "2017-11-10", "ga_date": "2018-08-28", "github_stars": null, "github_stars_at": null, "notable_customers": [ "Ingram Content Group" ] }, "scores": { "agent_friendliness": 20, "pricing_transparency": 100, "setup_speed": 85, "docs_quality": 15, "procurement_friction": 100, "trust_readiness": 90, "best_for": [ "Prototypes and side projects - free to start, no sales call", "Regulated or enterprise workloads - compliance attestations and an enterprise plan", "Teams needing broad API coverage out of the box" ], "avoid_if": [] }, "sources": [ { "field": "api_version", "url": "https://docs.cloud.google.com/text-to-speech/docs/reference/rest", "excerpt": "API Versions: v1 (stable) and v1beta1 (beta). Both versions coexist with separate endpoints.", "confidence": "high" }, { "field": "vendor_description", "url": "https://docs.cloud.google.com/text-to-speech/docs", "excerpt": "Cloud Text-to-Speech converts text or Speech Synthesis Markup Language (SSML) input into audio data of natural human speech.", "confidence": "high" }, { "field": "supported_actions", "url": "https://docs.cloud.google.com/text-to-speech/docs/reference/rest", "excerpt": "POST /v1/text:synthesize - Synchronous speech synthesis; POST /v1/{parent=projects/*/locations/*}:synthesizeLongAudio - Asynchronous long-form synthesis", "confidence": "high" }, { "field": "supported_actions", "url": "https://docs.cloud.google.com/text-to-speech/docs/chirp3-instant-custom-voice", "excerpt": "Reference and consent audio files generate a 'voice cloning key'—a text string representing the voice data stored client-side.", "confidence": "high" }, { "field": "supported_languages", "url": "https://docs.cloud.google.com/text-to-speech/docs/gemini-tts", "excerpt": "Gemini-2.5 TTS Flash and Pro in GA with capabilities for 30 speakers across 80+ locales", "confidence": "high" }, { "field": "input_types", "url": "https://docs.cloud.google.com/text-to-speech/docs/basics", "excerpt": "Raw text; Speech Synthesis Markup Language (SSML) - a supported subset of available elements", "confidence": "high" }, { "field": "output_types", "url": "https://docs.cloud.google.com/text-to-speech/docs/basics", "excerpt": "MP3; LINEAR16 (the encoding used in WAV files)", "confidence": "high" }, { "field": "pricing_model", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": "Text-to-Speech is priced based on the number of characters sent to the service to be synthesized into audio each month.", "confidence": "high" }, { "field": "free_tier_details", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": "The first 1 million characters for WaveNet voices are free each month, and for Standard (non-WaveNet) voices, the first 4 million characters are free each month.", "confidence": "high" }, { "field": "documented_rate_limits", "url": "https://docs.cloud.google.com/text-to-speech/quotas", "excerpt": "Maximum request size: 5,000 bytes total per request. Chirp 3: 200 RPM; Neural 2: 1,000 RPM; Studio: 500 RPM; General (all other voices): 1,000 RPM; Concurrent streaming sessions: 100 per project; Voice cloning key generation: 10 requests per minute", "confidence": "high" }, { "field": "soc2", "url": "https://cloud.google.com/security/compliance/soc-2", "excerpt": "Google Cloud only issues SOC 2 Type II reports. The core Google Cloud and Google Workspace SOC 2 Type II reports are issued quarterly and can be downloaded via the Compliance Reports Manager.", "confidence": "high" }, { "field": "gdpr", "url": "https://cloud.google.com/security/compliance", "excerpt": "Our products regularly undergo independent verification of security, privacy, and compliance controls, achieving certifications against global standards.", "confidence": "high" }, { "field": "pci_dss", "url": "https://cloud.google.com/security/compliance/pci-dss", "excerpt": null, "confidence": "low" }, { "field": "sandbox_available", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": "You must enable billing to use Text-to-Speech, and will be automatically charged if your usage exceeds the number of free characters allowed per month.", "confidence": "high" }, { "field": "self_serve_signup", "url": "https://docs.cloud.google.com/billing/docs/how-to/create-billing-account", "excerpt": "To create a self-serve Cloud Billing account, you sign in to the Manage billing accounts page in the Google Cloud console and click Create account.", "confidence": "high" }, { "field": "known_restrictions", "url": "https://docs.cloud.google.com/text-to-speech/docs/chirp3-instant-custom-voice", "excerpt": "Currently restricted to allow-listed users. Contact the sales team to request access. Users must record the required consent statement: 'I am the owner of this voice and I consent to Google using this voice to create a synthetic voice model.'", "confidence": "high" }, { "field": "categories", "url": "https://cloud.google.com/text-to-speech", "excerpt": "Text-to-Speech: Lifelike AI voices and speech synthesis", "confidence": "high" }, { "field": "supported_actions", "url": "https://docs.cloud.google.com/text-to-speech/docs/chirp3-hd", "excerpt": "Chirp 3: HD supports streaming synthesis through the streaming_synthesize() API method, enabling real-time audio generation as text is streamed in chunks.", "confidence": "high" }, { "field": "supported_languages", "url": "https://docs.cloud.google.com/text-to-speech/docs/list-voices-and-types", "excerpt": "Cloud TTS generates audio with natural, human-like quality, which creates speech that sounds like a real person.", "confidence": "high" }, { "field": "supported_regions", "url": "https://docs.cloud.google.com/text-to-speech/docs/endpoints", "excerpt": "US: https://us-texttospeech.googleapis.com; EU: https://eu-texttospeech.googleapis.com; US Central1: https://us-central1-texttospeech.googleapis.com; Asia Pacific: Tokyo, Sydney, Mumbai, Singapore, Seoul; European: London, Frankfurt, Eemshaven", "confidence": "high" }, { "field": "output_types", "url": "https://docs.cloud.google.com/text-to-speech/docs/chirp3-hd", "excerpt": "Streaming: ALAW, MULAW, OGG_OPUS, PCM; Batch: ALAW, MULAW, MP3, OGG_OPUS, PCM", "confidence": "high" }, { "field": "sdk_languages", "url": "https://docs.cloud.google.com/text-to-speech/docs/libraries", "excerpt": "Client libraries make it easier to access Google Cloud APIs from a supported language. C++, C#, Go, Java, Node.js, PHP, Python, Ruby", "confidence": "high" }, { "field": "free_tier_available", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": "The first 1 million characters for WaveNet voices are free each month, and for Standard (non-WaveNet) voices, the first 4 million characters are free each month.", "confidence": "high" }, { "field": "free_tier_details", "url": "https://costbench.com/software/ai-voice-tools/google-cloud-text-to-speech/free-plan/", "excerpt": "Standard Voices: 4M characters/month; Neural2 Voices: 1M characters/month; Studio Voices: 1M characters/month; Chirp 3 HD Voices: 1M characters/month", "confidence": "high" }, { "field": "documented_rate_limits", "url": "https://docs.cloud.google.com/text-to-speech/quotas", "excerpt": "gemini-2.5-flash-tts: 150 QPM; gemini-2.5-pro-tts: 125 QPM", "confidence": "high" }, { "field": "hipaa", "url": "https://cloud.google.com/security/compliance/hipaa", "excerpt": "Text-to-Speech is explicitly listed as a covered product under the Google Cloud BAA for HIPAA compliance.", "confidence": "high" }, { "field": "iso_27001", "url": "https://cloud.google.com/security/compliance/iso-27001", "excerpt": "The Google Cloud Services ISMS has received an accredited ISO/IEC 27001 certification after undergoing an audit by an independent third party.", "confidence": "high" }, { "field": "sla_published", "url": "https://cloud.google.com/text-to-speech/sla", "excerpt": "Text-to-Speech Service Level Agreement (SLA) | Google Cloud", "confidence": "high" }, { "field": "mcp_server_available", "url": "https://docs.cloud.google.com/mcp/supported-products", "excerpt": "Text-to-Speech does not appear in any of the three comprehensive tables provided (Google Cloud MCP servers, Google MCP servers, Google Workspace MCP servers).", "confidence": "high" }, { "field": "known_restrictions", "url": "https://docs.cloud.google.com/text-to-speech/docs/basics", "excerpt": "Cloud TTS does not support all SSML elements for all available languages.", "confidence": "high" }, { "field": "base_url", "url": "https://docs.cloud.google.com/text-to-speech/docs/reference/rest", "excerpt": "Base URL: https://texttospeech.googleapis.com", "confidence": "high" }, { "field": "versioning_scheme", "url": "https://docs.cloud.google.com/text-to-speech/docs/reference/rest", "excerpt": "Versioning Scheme: URL-path versioning (/v1/ and /v1beta1/ prefixes in endpoints)", "confidence": "high" }, { "field": "ga_date", "url": "https://cloud.google.com/blog/products/ai-machine-learning/announcing-updates-to-cloud-speech-to-text-and-general-availability-of-cloud-text-to-speech", "excerpt": "August 28, 2018 — General availability of Cloud Text-to-Speech with WaveNet voices expanded to 17 new languages", "confidence": "high" }, { "field": "stability", "url": "https://docs.cloud.google.com/text-to-speech/docs/release-notes", "excerpt": "Cloud Text-to-Speech API general availability (GA) release. This release includes the public availability of the v1 API endpoint, both in REST and RPC.", "confidence": "high" }, { "field": "ga_date", "url": "https://docs.cloud.google.com/text-to-speech/docs/release-notes", "excerpt": "Cloud Text-to-Speech API general availability (GA) release. This release includes the public availability of the v1 API endpoint, both in REST and RPC.", "confidence": "high" }, { "field": "auth_methods", "url": "https://docs.cloud.google.com/text-to-speech/docs/authentication", "excerpt": "Authentication Methods: Application Default Credentials (ADC), gcloud CLI Credentials, Service Account Credentials, User Credentials via gcloud auth application-default login", "confidence": "high" }, { "field": "api_style", "url": "https://docs.cloud.google.com/text-to-speech/docs/reference/rest", "excerpt": "Protocol: REST only. The API uses standard HTTP methods (GET, POST, DELETE) with no WebSocket support mentioned.", "confidence": "high" }, { "field": "sdk_packages", "url": "https://docs.cloud.google.com/text-to-speech/docs/libraries", "excerpt": "Supported languages: C++, C#, Go (cloud.google.com/go/texttospeech/apiv1), Java (com.google.cloud:google-cloud-texttospeech), Node.js (@google-cloud/text-to-speech), PHP, Python (google-cloud-texttospeech), Ruby — all Google Cloud client libraries", "confidence": "high" }, { "field": "quickstart_url", "url": "https://docs.cloud.google.com/text-to-speech/docs/quickstart-client-libraries", "excerpt": "Quickstart URL: https://docs.cloud.google.com/text-to-speech/docs/create-audio-text-client-libraries", "confidence": "high" }, { "field": "rate_limit_window", "url": "https://docs.cloud.google.com/text-to-speech/quotas", "excerpt": "Requests Per Minute (RPM) by Model Type — Standard (default): 1,000 RPM", "confidence": "high" }, { "field": "starting_price_usd", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": null, "confidence": "medium" }, { "field": "price_basis", "url": "https://cloud.google.com/text-to-speech/pricing", "excerpt": "Text-to-Speech is priced based on the number of characters sent to the service to be synthesized into audio each month.", "confidence": "high" }, { "field": "sla_url", "url": "https://cloud.google.com/text-to-speech/sla", "excerpt": null, "confidence": "high" }, { "field": "notable_customers", "url": "https://cloud.google.com/blog/products/ai-machine-learning/announcing-updates-to-cloud-speech-to-text-and-general-availability-of-cloud-text-to-speech", "excerpt": "Ingram Content Group: 'We are using Cloud Text-to-Speech to create a scalable and natural sounding voice solution to let our users access book previews for over 18 million titles.'", "confidence": "high" }, { "field": "launched_at", "url": "https://docs.cloud.google.com/text-to-speech/docs/release-notes", "excerpt": "November 10, 2017: Cloud Text-to-Speech API Alpha release.", "confidence": "high" }, { "field": "auth_docs_url", "url": "https://docs.cloud.google.com/text-to-speech/docs/authentication", "excerpt": "https://docs.cloud.google.com/text-to-speech/docs/authentication — the authentication guide provides environment-specific setup instructions for local development, Google Cloud deployments, and external infrastructure scenarios.", "confidence": "high" }, { "field": "deprecation_policy_url", "url": "https://cloud.google.com/terms/deprecation", "excerpt": "The primary URL for Google Cloud deprecation terms is https://cloud.google.com/terms/deprecation. The Google Cloud Platform Services described at https://cloud.google.com/terms/services are subject to the Deprecation Policy.", "confidence": "high" }, { "field": "sdk_packages", "url": "https://github.com/googleapis/google-cloud-python/tree/main/packages/google-cloud-texttospeech", "excerpt": "Official Python SDK for Google Cloud Text-to-Speech — hosted on googleapis GitHub organization, listed on PyPI as google-cloud-texttospeech", "confidence": "high" }, { "field": "rate_limit_requests", "url": "https://docs.cloud.google.com/text-to-speech/quotas", "excerpt": "Standard (default): 1,000 RPM; Neural2: 1,000 RPM; Studio: 500 RPM; Chirp3: 200 RPM; Long Audio Synthesis: 100 RPM; Concurrent Streaming Sessions: 100", "confidence": "high" }, { "field": "starting_price_usd", "url": "https://costbench.com/software/ai-voice-tools/google-cloud-text-to-speech/", "excerpt": "Standard Voices: $4 /per 1M characters; WaveNet Voices: $4 /per 1M characters; Neural2 Voices: $16 /per 1M characters; Polyglot Voices: $16 /per 1M characters; Studio Voices: $160 /per 1M characters; Chirp 3: HD Voices: $30 /per 1M characters", "confidence": "medium" }, { "field": "free_tier_limit", "url": "https://costbench.com/software/ai-voice-tools/google-cloud-text-to-speech/", "excerpt": "Free Tier Monthly Allowances: Standard voices: 4 million characters; WaveNet voices: 1 million characters; Neural2 voices: 1 million characters; Studio voices: 1 million characters; Chirp 3 HD voices: 1 million characters", "confidence": "medium" }, { "field": "requires_verification", "url": "https://docs.cloud.google.com/text-to-speech/docs/get-started", "excerpt": "You must enable billing to use Cloud Text-to-Speech API; however, you won't be charged unless you exceed the free quota. A billing account must be linked to access the service.", "confidence": "high" }, { "field": "data_retention_policy_url", "url": "https://cloud.google.com/terms/cloud-privacy-notice", "excerpt": "Standard retention: Up to 180 days (exact number depends on the specific type of Service Data). Service Data is deleted or anonymized when no longer needed.", "confidence": "high" }, { "field": "mcp_url", "url": "https://docs.cloud.google.com/mcp/supported-products", "excerpt": "Text-to-Speech does not appear in any of the three comprehensive tables provided (Google Cloud MCP servers, Google MCP servers, Google Workspace MCP servers).", "confidence": "high" } ], "fields_not_found": [ "pci_dss", "sla_uptime_percentage_exact", "ttfb_latency_documented", "idempotency_supported (no idempotency keys documented)", "webhook_signing", "webhook_events_url", "mcp_url", "sla_url exact uptime percentage (page truncated)", "error_format (standard Google API JSON errors implied but not detailed in TTS docs)" ], "source_confidence": "high", "last_verified_at": "2026-06-21T00:00:00.000Z", "contribute": { "note": "This data is crowd-editable. Suggest corrections or leave a review via these endpoints - no auth required, requests are rate-limited, and every submission is reviewed before it goes live. For a field edit, {field} is any key in this response and a citation is required.", "endpoints": [ { "action": "review", "label": "Leave a review or comment", "method": "POST", "url": "https://apio.sh/api/feedback/google-text-to-speech", "example_body": { "kind": "review", "rating": 5, "body": "Your experience with this API…" } }, { "action": "field_edit", "label": "Suggest a correction to a field (cite a source)", "method": "POST", "url": "https://apio.sh/api/suggest/google-text-to-speech/{field}", "example_body": { "value": "corrected value", "citations": [ { "url": "https://source.example/page", "excerpt": "supporting quote" } ], "note": "what changed and why" } }, { "action": "new_api", "label": "Suggest a new API to add (only name is required - send as much as you can cite)", "method": "POST", "url": "https://apio.sh/api/suggest/api", "example_body": { "value": { "name": "Acme Email API", "website_url": "https://acme.example", "vendor_name": "Acme", "categories": [ "email" ], "pricing_model": "usage_based", "has_published_pricing": true, "free_tier_available": true, "price_points": [ { "plan": "Pay as you go", "item": "1,000 emails", "amount_usd": 1, "per": "1,000 emails", "source_url": "https://acme.example/pricing" } ], "soc2": "type_2", "docs_url": "https://docs.acme.example" }, "citations": [ { "url": "https://acme.example/pricing", "excerpt": "$1 per 1,000 emails" } ] }, "value_schema": [ { "field": "name", "type": "string", "label": "Product name (the only required field)" }, { "field": "website_url", "type": "string", "label": "Marketing website URL" }, { "field": "vendor_name", "type": "string", "label": "Company/vendor name behind the product" }, { "field": "vendor_description", "type": "string", "label": "One-line description, quoted from the vendor" }, { "field": "categories", "type": "string[]", "label": "Category/leaf slugs it belongs to, e.g. [\"email\",\"sms\"]" }, { "field": "primary_use_cases", "type": "string[]", "label": "What it's used for" }, { "field": "supported_actions", "type": "string[]", "label": "Concrete API actions/capabilities" }, { "field": "supported_regions", "type": "string[]", "label": "Countries/regions/data-residency" }, { "field": "supported_languages", "type": "string[]", "label": "Human/spoken languages supported" }, { "field": "input_types", "type": "string[]", "label": "Accepted input types/formats" }, { "field": "output_types", "type": "string[]", "label": "Produced output types/formats" }, { "field": "webhooks_supported", "type": "bool", "label": "Supports webhooks?" }, { "field": "sandbox_available", "type": "bool", "label": "Dedicated sandbox/test mode?" }, { "field": "sdk_languages", "type": "string[]", "label": "Languages with an official SDK" }, { "field": "mcp_server_available", "type": "bool", "label": "Official MCP server?" }, { "field": "pricing_model", "type": "enum", "label": "Pricing model", "values": [ "usage_based", "subscription", "seat_based", "hybrid", "contact_sales" ] }, { "field": "has_published_pricing", "type": "bool", "label": "Concrete prices published publicly?" }, { "field": "free_tier_available", "type": "bool", "label": "Recurring/perpetual free tier (not a trial)?" }, { "field": "free_tier_details", "type": "string", "label": "What the free tier includes" }, { "field": "minimum_commitment", "type": "string", "label": "Any stated minimum spend/commitment" }, { "field": "self_serve_signup", "type": "bool", "label": "Get an API key without talking to sales?" }, { "field": "requires_sales_call", "type": "bool", "label": "Does going live require sales?" }, { "field": "enterprise_plan_available", "type": "bool", "label": "Named enterprise tier?" }, { "field": "starting_price_usd", "type": "number", "label": "Lowest published paid entry price (USD number)" }, { "field": "price_basis", "type": "string", "label": "Unit the starting price is per, e.g. '1,000 emails'" }, { "field": "free_tier_limit", "type": "string", "label": "Free-tier ceiling in literal terms" }, { "field": "price_points", "type": "object[]", "label": "Structured prices: [{plan,item,amount_usd,amount_percent,per,source_url}]" }, { "field": "soc2", "type": "enum", "label": "SOC 2 status", "values": [ "type_2", "type_1", "in_progress", "none", "unknown" ] }, { "field": "hipaa", "type": "bool", "label": "HIPAA (e.g. BAA available)?" }, { "field": "gdpr", "type": "bool", "label": "GDPR compliance stated?" }, { "field": "iso_27001", "type": "bool", "label": "ISO 27001 certified?" }, { "field": "pci_dss", "type": "bool", "label": "PCI DSS compliant?" }, { "field": "sla_published", "type": "bool", "label": "Published SLA / uptime commitment?" }, { "field": "documented_rate_limits", "type": "string", "label": "Documented rate limits, quoted" }, { "field": "known_restrictions", "type": "string[]", "label": "Notable documented restrictions/limits" }, { "field": "auth_methods", "type": "string[]", "label": "Auth methods", "values": [ "api_key", "oauth2", "jwt", "basic", "hmac_signature", "mtls", "session" ] }, { "field": "api_style", "type": "enum", "label": "Primary API style", "values": [ "rest", "graphql", "grpc", "soap", "websocket" ] }, { "field": "base_url", "type": "string", "label": "API root/base URL" }, { "field": "api_version", "type": "string", "label": "Current API version string" }, { "field": "quickstart_url", "type": "string", "label": "Quickstart / hello-world URL" }, { "field": "docs_url", "type": "string", "label": "Developer docs URL" }, { "field": "api_reference_url", "type": "string", "label": "API reference URL" }, { "field": "openapi_spec_url", "type": "string", "label": "OpenAPI spec URL" }, { "field": "changelog_url", "type": "string", "label": "Changelog URL" }, { "field": "status_page_url", "type": "string", "label": "Status page URL" }, { "field": "notable_customers", "type": "string[]", "label": "Named public customers" }, { "field": "launched_at", "type": "string", "label": "Launch date (ISO date or year)" } ] }, { "action": "token", "label": "Optional - raise your rate limit", "method": "GET", "url": "https://apio.sh/api/feedback/token" } ] } }