blockrun_speech
Convert text to speech using ElevenLabs voices, generate cinematic sound effects from prompts, or list available voices. Each call returns a hosted audio URL.
Instructions
ElevenLabs voice via BlockRun x402 — speak text aloud, generate sound effects, list voices.
Actions:
speak (default): text-to-speech. E.g. "speak this with the sarah voice". Price = chars/1000 × rate (min $0.001), quoted before payment.
sound_effect: cinematic sound effects from a text prompt, up to 22s ($0.0525/clip)
voices: list available voices (free)
Models (speak): elevenlabs/flash-v2.5 ($0.05/1k chars, ~75ms, default), elevenlabs/turbo-v2.5 ($0.05/1k), elevenlabs/multilingual-v2 ($0.10/1k, narration), elevenlabs/v3 ($0.10/1k, most expressive)
Voice aliases: sarah (default), george, laura, charlie, river, roger, callum, harry — or any raw ElevenLabs voice_id.
Returns a hosted audio URL — download immediately if you need to keep the file.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| input | No | speak: text to synthesize. sound_effect: description of the sound, e.g. 'rain on a tin roof, distant thunder' (max 1000 chars). | |
| model | No | Speech model (speak only) | elevenlabs/flash-v2.5 |
| speed | No | Playback speed 0.7-1.2 (speak only) | |
| voice | No | Voice alias (sarah, george, laura, charlie, river, roger, callum, harry) or raw ElevenLabs voice_id. Default: sarah. | |
| action | No | speak: text-to-speech (default). sound_effect: generate a sound effect. voices: list voices (free). | speak |
| agent_id | No | Agent identifier for budget tracking and enforcement. | |
| response_format | No | Audio format | mp3 |
| duration_seconds | No | Sound effect length in seconds (sound_effect only; default: auto) | |
| prompt_influence | No | How literally to follow the prompt, 0-1 (sound_effect only) |