# How to integrate Splice MCP with Hermes

```json
{
  "title": "How to integrate Splice MCP with Hermes",
  "toolkit": "Splice MCP",
  "toolkit_slug": "splice_mcp",
  "framework": "Hermes",
  "framework_slug": "hermes-agent",
  "url": "https://composio.dev/toolkits/splice_mcp/framework/hermes-agent",
  "markdown_url": "https://composio.dev/toolkits/splice_mcp/framework/hermes-agent.md",
  "updated_at": "2026-09-07T05:32:35.907Z"
}
```

## Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.
This guide explains the easiest and most robust way to connect your Splice account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

## Also integrate Splice MCP with

- [ChatGPT Work](https://composio.dev/toolkits/splice_mcp/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/splice_mcp/framework/claude-cowork)

## TL;DR

### What is Composio Connect?
Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:
- Search and load tools from relevant toolkits on-demand, reducing context usage.
- Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
- Manage app authentication end-to-end with zero manual overhead.

## Connect Splice MCP to Hermes

### Integrating Splice with Hermes
### Using Composio Connect CLI
1. Install the Composio CLI
Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

```bash
curl -fsSL https://composio.dev/install | bash
```

## What is the Splice MCP server, and what's possible with it?

The Splice MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Splice account. It provides structured and secure access so your agent can perform Splice operations on your behalf.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `SPLICE_MCP_CREATE_STACK` | Create stack | Create a stack from an existing sample. This is the ONLY tool that can use a previously found or selected sample as a seed — if the user wants to build a stack around a specific sample, you MUST use this tool (not prompt_to_stack). ROUTING RULE: Any request like 'create a stack from this sample', 'build around this loop', 'use this as a seed', or referencing a specific asset UUID MUST use this tool. The seed sample MUST be a loop (not a one-shot). If the user asks to build a stack from a one-shot, do NOT silently search for loops. Instead, FIRST explain to the user that one-shots cannot be used as stack seeds because stacks require loopable samples to layer together, THEN offer to find similar loops that match the style or character of the one-shot they liked. Uses the loop as the starting layer and generates a full multi-layer stack of compatible samples around it. |
| `SPLICE_MCP_DESCRIBE_A_SOUND` | Describe a sound | Search the Splice catalog for sounds matching a natural language description. Returns sample metadata including BPM, key, tags, duration, and Splice links. Use this to BROWSE and EXPLORE individual sounds -- when the user wants to find, preview, or discover specific samples, loops, or one-shots. Do NOT call this tool alongside prompt_to_stack for the same request. If the user wants a complete multi-track beat or arrangement, use prompt_to_stack instead. Present ALL results to the user exactly as numbered; do not filter, omit, or reorder any results — let the user decide which sounds are relevant. IMPORTANT: One-shots CANNOT be used as seeds to create stacks — only loops can. If the user searched for one-shots and then asks to create a stack from those results, you MUST explicitly tell the user that one-shots cannot be used to create stacks and offer to search for similar loops instead. Do NOT silently pivot to loops. |
| `SPLICE_MCP_DOWNLOAD_ASSET` | Download asset | Purchase and get a presigned download URL for a sound from the Splice catalog. The server returns a presigned URL — it does not write files. If the client has local filesystem access, it should fetch the URL and save the file to download_path; otherwise omit download_path and present the URL to the user. IMPORTANT: The first time an asset is downloaded it spends one of the user's credits. Subsequent downloads of the same asset are free. Always confirm with the user before calling this tool. The URL expires quickly — always display the file name alongside the download URL so the user can identify and access their file. |
| `SPLICE_MCP_PROMPT_TO_STACK` | Prompt to stack | Generate a complete multi-track arrangement of compatible samples from a text description. Use this ONLY when the user describes a sound from scratch without referencing a specific existing sample. This tool does NOT accept a sample UUID as input -- it creates a stack entirely from a text prompt. ROUTING RULE: If the user says anything like 'create a stack from this sample', 'build a stack around this loop', or 'use this as a seed', you MUST use create_stack instead -- even if the user also provides a text description of the desired sound. Do NOT call this tool alongside describe_a_sound for the same request. If the user just wants to browse or find individual sounds, use describe_a_sound instead. Uses AI to interpret your prompt, select appropriate instrument layers (drums, bass, keys, etc.), and filters, and find matching harmonically coherent samples. BPM GUIDANCE: Always include a target BPM in the prompt AND set bpm_min/bpm_max to avoid extreme time-stretching. If the user specifies a genre but not a BPM, infer the range from the genre. Optionally generates a public shareable URL. |
| `SPLICE_MCP_SHARE_STACK` | Share stack | Generate a public shareable URL for an existing stack. Takes a stack UUID (from a previous create call) and returns a shareable link. |
| `SPLICE_MCP_UPDATE_STACK` | Update stack | Modify an existing stack. Use this tool to add, remove, or swap sounds in a stack, rename it, or change its BPM. LAYER LIMIT: Stacks have a maximum of 8 layers. Adding layers beyond this limit will fail. If the stack already has 8 layers, remove existing layers before adding new ones. Required parameter: stack_uuid (the UUID, not a URL). To remove layers, pass their UUIDs via remove_layer_uuids. At least one modification must be provided. When adding or swapping layers, PREFER add_compatible_layers and swap_compatible_layers — these find harmonically compatible samples that fit the existing stack. Only use add_asset_uuids or swap_layers when the user has explicitly chosen a specific sample to use. DRUMS: When adding drums, ALWAYS include the 'grooves' tag in the tag_filter (e.g. '(hip hop \|\| trap) && grooves', 'house && grooves') to get complete drum patterns (kick + snare + hats combined). Without the 'grooves' tag, the search returns isolated single-hit layers (just kicks, just snares, etc.) instead of full drum loops. Only omit 'grooves' if the user explicitly asks for an isolated drum element. Optional tag filter DSL to narrow sample selection. Prefer && (intersection) so all tags must match for precise results; fall back to \|\| (union) only if intersection returns too few results. Valid tags per layer type: drums: grooves, house, hip hop, techno, tech house, hats, live sounds, trap, deep house, kicks, edm, pop, downtempo, snares, percussion, rnb; percussion: live sounds, house, techno, hip hop, tech house, cinematic, shakers, trap, downtempo, acoustic, deep house, edm, synth, pop; bass: synth, house, sub, techno, hip hop, tech house, edm, electric, trap, deep house, drum and bass, rnb, downtempo, dubstep; guitar: electric, live sounds, electric guitar, hip hop, acoustic, rnb, pop, rock, trap, soul, wet, funk, downtempo, lo-fi hip hop, dry; keys: piano, hip hop, electric piano, synth, rnb, soul, trap, live sounds, house, downtempo, pop, lo-fi hip hop, organ, deep house, jazz; strings: live sounds, hip hop, organic, acoustic, cinematic, synth, cello, folk, dry, clean, violin, trap, rnb, soul; vocals: female, pop, wet, edm, live sounds, dry, male, rnb, house, hip hop, pitched, cinematic, trap, soul, future bass; chords: synth, keys, hip hop, rnb, piano, guitar, live sounds, soul, trap, house, electric, pop, electric piano, downtempo, lo-fi hip hop; leads: synth, house, edm, wet, trap, techno, hip hop, pop, vocals, tech house, progressive house, rnb, guitar, deep house, trance; pads: synth, hip hop, house, downtempo, trap, techno, ambient, rnb, cinematic, pop, synthwave, deep house, edm, tech house, soul; brass-and-woodwinds: live sounds, hip hop, trap, organic, synth, cinematic, dry, acoustic, jazz, rnb, soul, clean; synth: house, techno, hip hop, trap, tech house, edm, deep house, downtempo, pop, rnb, progressive house, sub, wet, synthwave, future bass; fx: synth, techno, house, cinematic, ambient, edm, hip hop, vocals, percussion, downtempo, tech house, live sounds, trap, pop |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Splice MCP server provides comprehensive access to Splice operations through Composio. Once connected, Hermes can perform all major Splice actions on your behalf using natural language commands.

## Complete Code

None listed.

## Conclusion

### Way Forward
With Splice connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.
From here, you can extend Hermes further:
- Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
- Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
- Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.
If you run into trouble or want to share what you've built, join the [community](https://discord.com/invite/composio) or check out the [Docs](https://docs.composio.dev?utm_source=toolkits&utm_medium=framework_template&utm_campaign=hermes&utm_content=docs) for deeper configuration options.

## How to build Splice MCP Agent with another framework

- [ChatGPT Work](https://composio.dev/toolkits/splice_mcp/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/splice_mcp/framework/claude-cowork)

## Related Toolkits

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- [Dynapictures](https://composio.dev/toolkits/dynapictures) - Dynapictures is a cloud-based platform for generating personalized images at scale. Instantly create hundreds of custom visuals using your data sources, like Google Sheets.
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- [Excalidraw MCP](https://composio.dev/toolkits/excalidraw_mcp) - Excalidraw MCP is a no-auth MCP server for creating hand-drawn style diagrams in Excalidraw. Use it to generate visual sketches with viewport camera control and fullscreen editing.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Splice MCP?

With a standalone Splice MCP server, the agents and LLMs can only access a fixed set of Splice tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Splice and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Hermes?

Yes, you can. Hermes fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Splice tools.

### Can I manage the permissions and scopes for Splice while using Tool Router?

Yes, absolutely. You can configure which Splice scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Splice data and credentials are handled as safely as possible.

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