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    • Generate speech

    Convert text to audio

    POST /v1/audio/speech

    Service root: https://getrouter.ai

    Protocol: OpenAI Audio

    Authentication: Authorization: Bearer YOUR_API_KEY

    Request body

    The request body is required. Media type: application/json

    Request fields

    FieldTypeRequiredDescription
    modelstringYes—
    inputstringYesText to convert
    voicestringYesAllowed values: alloy, echo, fable, onyx, nova, shimmer
    response_formatstringNoAllowed values: mp3, opus, aac, flac, wav, pcm; Default: "mp3"
    speednumberNoDefault: 1; Range: 0.25–4

    Example request

    curl --request POST \
  --url https://getrouter.ai/v1/audio/speech \
  --header "Authorization: Bearer YOUR_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "MODEL_ID",
  "input": "Hello, introduce yourself.",
  "voice": "alloy"
}'

    Responses

    StatusDescription
    200Audio generated successfully

    Success response fields

    No top-level fields are defined in this schema.

    For complete workflows and examples, read the Audio API Guide.

    This page is generated from the public Relay OpenAPI specification. Browse the complete specification in the API Explorer.