Wwise MCP Server

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Lightweight Node.js + TypeScript MCP server for Wwise WAAPI.

⭐ Uses progressive tool discovery. Avoiding consuming large tokens by exposing the full WAAPI tool surface at once.

⭐ Use locally installed Wwise's WAAPI Json Schema for full WAAPI capabilities.

Quick start

Install dependencies

npm i

Configure Wwise install ROOT and WAAPI connection

Configurations are stored in config/runtime.json

If you leave the wwiseRoot configuration empty, or the path is invalid, the tool will use %WWISEROOT% to try finding the path.

The waapiUrl defaults to ws://127.0.0.1:8080/waapi if not specified.

// Example
{
  "wwiseRoot": "C:/Program Files (x86)/Audiokinetic/Wwise 2024.1.0.8669",
  "waapiUrl": "ws://127.0.0.1:8080/waapi"
}

Run in development (stdio default)

npm run dev

Or build and run

npm run build
npm start

Schema source and startup requirements

This project does not redistribute Audiokinetic WAAPI schema JSON files.

At startup, the server resolves WAAPI schema directory using this priority:

1. config/runtime.json -> wwiseRoot
2. WWISEROOT environment variable
3. Live WAAPI probe:
   • call ak.wwise.core.getProjectInfo to confirm a project is open
   • call ak.wwise.core.getInfo and read directories.install

Expected schema path under root:

<WwiseRoot>/Authoring/Data/Schemas/WAAPI

If all probes fail, startup exits with waapi_schema_not_found.

Core capabilities

• Layered architecture: core + registry + domains + lib.
• Progressive-disclosure MCP surface:
  • tools/list only exposes discovery tools, not every runtime WAAPI tool
  • currently exposed discovery tools:
    • session.configure
    • session.getConfig
    • catalog.listDomains
    • catalog.listTools
    • catalog.getToolSchema
    • catalog.executeTool
• Discovery and execution flow:
  • catalog.listDomains
  • catalog.listTools
  • catalog.getToolSchema
  • catalog.executeTool
• Runtime-backed WAAPI tools across major domains.
• Standard response envelope:
  • success: { ok: true, data: ... }
  • failure: { ok: false, error: { code, message, details? } }
• Structured tool call logs with sensitive-field redaction.

Transport modes

stdio mode (default)

Use for standard MCP clients that spawn the server as a subprocess.

npm run dev

npm start
# equivalent to: node dist/src/index.js

Example MCP client config:

{
  "servers": {
    "wwise-mcp": {
      "type": "stdio",
      "command": "node",
      "args": ["dist/src/index.js"]
    }
  }
}

HTTP/SSE mode

Use when you want a long-running MCP endpoint over HTTP.

node dist/src/index.js --http

node dist/src/index.js --http --port 8080

MCP_TRANSPORT=http PORT=8080 node dist/src/index.js

HTTP endpoint summary:

Method	Path	Purpose
POST	/mcp	Send JSON-RPC requests. Omit mcp-session-id on first initialize to create session.
GET	/mcp	Open standalone SSE stream for server notifications. Requires mcp-session-id.
DELETE	/mcp	Close session. Requires mcp-session-id.

Port selection priority:

1. --port <n>
2. PORT env var
3. default 3000

The HTTP server binds to 127.0.0.1 by default.

Verify

npm run build
npm run verify

Verification checks:

• only discovery tools are registered through MCP tools/list
• domains can be enumerated through catalog.listDomains
• domain-local tools can be discovered through catalog.listTools
• one tool schema can be queried through catalog.getToolSchema
• one runtime WAAPI call can be executed through catalog.executeTool
• WAAPI failure is still returned as a structured error when WAAPI is unavailable

Note: verify requires schema path resolution to succeed first.

WAAPI connection

Default WAAPI URL:

ws://127.0.0.1:8080/waapi

Configure in config/runtime.json:

{
  "waapiUrl": "ws://host:port/waapi"
}

Connecting to a specific Wwise instance

Each Wwise instance exposes WAAPI on a configurable port (default 8080). If multiple Wwise instances are running on the same machine, each must use a different port — Wwise will refuse to start its WAAPI server if the chosen port is already in use.

Use the session.configure tool at runtime to switch the target port without restarting the server:

// Switch to a Wwise instance running on port 8081
{ "port": 8081 }

The change is persisted to runtime.json and the current WAAPI session is disconnected. The next WAAPI call automatically reconnects to the new port.

Use session.getConfig to check the currently configured URL.

Access filtering

Optional startup filters:

• WWISE_MCP_ALLOWED_DOMAINS=object,soundengine
• WWISE_MCP_ALLOWED_RISKS=low,medium
• WWISE_MCP_ALLOWED_PERMISSIONS=waapi:authoring:read,waapi:runtime

Package as EXE

npm run package:exe

Output file: bin/wwise-mcp.exe

Manual validation

After startup, call tools in this order:

1. catalog.listDomains
2. catalog.listTools with { "domain": "object", "includePlanned": true }
3. catalog.getToolSchema with { "toolName": "ak.wwise.core.object.get" }
4. catalog.executeTool with { "toolName": "ak.wwise.core.object.get", "arguments": { ... } }

This is the intended progressive-disclosure path: domain summary -> tool summary -> schema details -> execution.

The practical implication is that MCP clients no longer receive the full callable WAAPI surface during tools/list. They first discover available domains and tools, then request schema details for one tool, and only then execute that tool through the unified catalog.executeTool entrypoint.

Extend with new domains

1. Copy src/domains/example/tools.ts to a new domain folder.
2. Export getYourDomainTools() returning ToolDefinition[].
3. Add domain metadata to config/domains.json.
4. Import/register tools in src/index.ts.
5. Extend src/lib/referenceCatalog.ts mapping when needed.