{"id":"cartesia","name":"Cartesia","category":"media","summary":"Generate and transcribe speech through hosted voice models and agent tools.","description":"Use Cartesia APIs, SDKs or its remote MCP server to turn text into audio, transcribe speech, inspect voices and manage pronunciation dictionaries.","url":"https://aiagentstore.ai/services-for-ai-agents/cartesia","website":"https://cartesia.ai/?utm_source=aiagentstore.ai","docs":"https://docs.cartesia.ai/tools/ai/mcp?utm_source=aiagentstore.ai","interfaces":["api","sdk","mcp"],"capabilities":["speech-synthesis","speech-to-text","voice"],"humanSetup":"Create a Cartesia account, select a usage plan and obtain server credentials or sign in through the MCP connection. Choose the voice, model and audio format required by the destination.","authentication":"Trusted servers use an API key in X-Api-Key or an Authorization bearer header. Browser clients use short-lived access tokens. The MCP endpoint https://mcp.cartesia.ai/mcp prompts for account sign-in.","billing":"Speech-model usage consumes plan credits, with TTS driven by text and STT by endpoint, model and audio duration. Managed voice-agent calls are a separate per-minute bill and are not included in speech-model credits.","firstTask":"List available voices, then generate a short approved sample with a specific voice and audio format. Play or decode the output before sending it downstream.","limitations":"TTS and STT have separate concurrency limits; WebSocket limits also apply. A generated file is not proof that the destination can play it. Stored-generation download links may expire.","readiness":"autonomous-after-setup","paymentMode":"provider-account","agentPayments":"not-verified","verifiedAt":"2026-10-21","verification":"Official documentation reviewed; account onboarding and paid execution not independently tested.","sources":["https://docs.cartesia.ai/tools/ai/mcp?utm_source=aiagentstore.ai","https://docs.cartesia.ai/get-started/authenticate-your-client-applications?utm_source=aiagentstore.ai","https://docs.cartesia.ai/get-started/realtime-text-to-speech-quickstart?utm_source=aiagentstore.ai","https://docs.cartesia.ai/pricing?utm_source=aiagentstore.ai","https://docs.cartesia.ai/use-the-api/concurrency-limits-and-timeouts?utm_source=aiagentstore.ai"],"siteGuide":{"title":"Match the audio contract before connecting speech to a live workflow","summary":"Trained speech models and hosted inference capacity provide audio capabilities beyond text generation. Writing a waveform handler does not reproduce the learned voice model or supply serving capacity.","url":"https://aiagentstore.ai/services-for-ai-agents/cartesia#integration-playbook","contentType":"text/html","requiresBrowser":false,"includes":["selection rationale","suggested workflow","acceptance checks","failure recovery","related services"],"basis":"Original AI Agent Store editorial guidance; not an execution benchmark."},"categoryUrl":"https://aiagentstore.ai/services-for-ai-agents/category/media","tagLinks":[{"id":"api","url":"https://aiagentstore.ai/services-for-ai-agents/tag/api"},{"id":"sdk","url":"https://aiagentstore.ai/services-for-ai-agents/tag/sdk"},{"id":"mcp","url":"https://aiagentstore.ai/services-for-ai-agents/tag/mcp"},{"id":"speech-synthesis","url":"https://aiagentstore.ai/services-for-ai-agents/tag/speech-synthesis"},{"id":"speech-to-text","url":"https://aiagentstore.ai/services-for-ai-agents/tag/speech-to-text"},{"id":"voice","url":"https://aiagentstore.ai/services-for-ai-agents/tag/voice"}]}