---
title: "Use Suno in Hermes Agent via RunAPI — Music API Guide"
url: "https://runapi.ai/hermes-suno.md"
canonical: "https://runapi.ai/hermes-suno"
locale: "en"
model: "suno"
---

# Use Suno in Hermes Agent.

Suno generates full songs — vocals, instruments, and mixing — from a text prompt or exact lyrics. Versions v4 through v5.5 are available through RunAPI, which provides API access since Suno has no official public API. Hermes Agent calls it through the custom:runapi provider with the same API key used for chat.

## API example

```bash
curl -X POST https://runapi.ai/api/v1/suno/text_to_music \
  -H "Authorization: Bearer $RUNAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "suno-v5.5",
    "vocal_mode": "auto_lyrics",
    "prompt": "An upbeat indie pop track about coding late at night, warm synths and acoustic guitar",
    "vocal_gender": "female"
  }'

```

### Response

```json
{
  "task_id": "tsk_abc123",
  "status": "pending",
  "model": "suno-v5.5"
}

```

## How it works

1. **Configure RunAPI** — Set RUNAPI_API_KEY in the environment where Hermes Agent runs. If you already added RunAPI as a custom:runapi provider, the same key and base_url handle Suno music requests.
2. **Call text_to_music** — Send a POST to the text_to_music endpoint with the model and vocal_mode. Use auto_lyrics with a prompt for AI-written lyrics, exact_lyrics with lyrics/style/title for your own words, or instrumental with style/title for no vocals.
3. **Poll for the result** — The endpoint returns a task_id immediately. Song generation takes 30 seconds to several minutes depending on version. Poll the task status endpoint until the status is completed, then read the output audio URL.

## Parameters

| Parameter | Type | Description |
|-----------|------|-------------|
| `model` | `string` | Required. suno-v4, suno-v4.5, suno-v4.5-all, suno-v4.5-plus, suno-v5, or suno-v5.5. |
| `vocal_mode` | `string` | Required. auto_lyrics (AI writes lyrics from prompt), exact_lyrics (you provide lyrics/style/title), or instrumental (no vocals, requires style/title). |
| `prompt` | `string` | Song brief for auto_lyrics mode. Describe genre, mood, tempo, and subject. Forbidden in exact_lyrics and instrumental modes. |
| `lyrics` | `string` | Exact lyrics to sing. Required for exact_lyrics mode. Forbidden in auto_lyrics and instrumental modes. |
| `style` | `string` | Music style description, e.g. lo-fi hip hop, 80s synthwave. Required for exact_lyrics and instrumental modes. |
| `title` | `string` | Song title. Required for exact_lyrics and instrumental modes. |
| `vocal_gender` | `string` | Optional. male or female. |
| `negative_tags` | `string` | Optional. Styles to avoid, e.g. heavy metal, screaming. |
| `duration_seconds` | `integer` | Optional. Target duration in seconds. |
| `persona_id` | `string` | Optional. Persona ID for custom voice or style profiles. |
| `persona_type` | `string` | Optional. style or voice. Selects the persona category. |
| `callback_url` | `string` | Optional. Webhook URL that receives a POST when the task completes. |

## FAQ

### How do I write better Suno prompts to get the genre and style I want?

Be specific about genre, mood, tempo, and instrumentation in your prompt. For example, "upbeat 120 BPM indie pop with acoustic guitar and warm synths" works better than "happy song." Use negative_tags to exclude unwanted elements. Meta tags in the prompt help Suno understand song structure.

### How do I configure RunAPI as a custom provider in Hermes Agent for Suno?

Add a custom:runapi provider in the Hermes Agent config with base_url set to https://runapi.ai/v1 and api_key reading from RUNAPI_API_KEY. The same provider handles chat, image, video, and music endpoints -- no separate config for Suno.

### Can I extend a Suno song beyond the initial clip length?

Yes. Use the extend_music endpoint to continue a song from a specific timestamp. You can chain multiple extensions to build longer tracks. RunAPI also offers cover_audio to restyle existing tracks and create_mashup to combine elements from multiple songs.

### Can I generate instrumental-only tracks without vocals?

Yes. Set vocal_mode to instrumental and provide style and title fields. The prompt and lyrics fields must be omitted in instrumental mode. The API enforces these cross-field rules and returns a validation error if conflicting fields are sent.

### What other Suno endpoints are available beyond text_to_music?

RunAPI exposes cover_audio (restyle an existing track), extend_music (continue a song from a timestamp), create_mashup (combine elements from multiple tracks), text_to_sound (sound effects), and utility endpoints like generate_lyrics, generate_persona, and separate_audio_stems. All share the same API key and task lifecycle.

### How does Hermes Agent handle Suno's custom lyrics mode?

Set the is_custom parameter to true and provide your exact lyrics in the prompt field when calling the Suno endpoint through Hermes Agent. The custom:runapi provider passes all parameters to Suno, which generates the song using your lyrics.

### Can Hermes Agent chain Suno with video models for complete content creation?

Yes. Hermes Agent can generate video with Kling or Veo 3, then create a matching soundtrack with Suno, combining both outputs into a complete audiovisual package within one workflow.


## Links

- [Hermes Agent setup guide →](https://runapi.ai/hermes-agent)
- [Suno on RunAPI →](https://runapi.ai/models/suno)
- [Model catalog](https://runapi.ai/models)
- [API docs](https://runapi.ai/docs)