Use RunComfy's API to run heygen/heygen-voice/text-to-audio. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/heygen/heygen-voice/text-to-audio \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"text": "The last ferry leaves at nine. If you miss it, the harbor lights stay on, but the gate will already be shut.",
"voice_id": "Nadine - Calm & Gentle"
}'Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/heygen/heygen-voice/text-to-audio \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"text": "The last ferry leaves at nine. If you miss it, the harbor lights stay on, but the gate will already be shut.",
"voice_id": "Nadine - Calm & Gentle"
}'Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a queued job by request_id; in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"Provide a publicly reachable HTTPS URL. Ensure the host allows server-side fetches (no login/cookies required) and isn't rate-limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre-signed URLs for private assets.
{
"type": "object",
"title": "Input schema",
"required": [
"text",
"voice_id"
],
"properties": {
"text": {
"title": "Text",
"description": "Plain prose to speak, up to 5000 characters.",
"type": "string",
"maxLength": 5000,
"default": "The last ferry leaves at nine. If you miss it, the harbor lights stay on, but the gate will already be shut."
},
"voice_id": {
"title": "Voice",
"description": "Public voice that reads the text.",
"type": "string",
"enum": [
"Nadine - Calm & Gentle",
"Vincent - Thoughtful & Clear",
"Jonah - Clear & Professional",
"Elowen - Warm & Soothing",
"Hugh - Firm & Measured",
"Cecily - Warm & Friendly",
"Lucian - Conversational & Easygoing",
"Noelle - Warm & Soothing"
],
"default": "Nadine - Calm & Gentle"
},
"language": {
"title": "Language",
"description": "Language of the text. Auto detects it from the paragraph.",
"type": "string",
"enum": [
"auto",
"en",
"es",
"fr",
"de",
"pt",
"it"
],
"default": "auto"
},
"expressiveness_boost": {
"title": "Expressiveness",
"description": "How lifted the delivery is. 0 is flatter and 1 is the fullest.",
"type": "number",
"default": 0.8,
"minimum": 0,
"maximum": 1
}
}
}{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": {
"type": "string",
"format": "uri"
}
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": {
"type": "string",
"format": "uri"
}
}
}
}
}RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.