Create Workflow MCP Server

Create an MCP server that exposes deployed workflows as tools. Every supplied workflow must already be deployed. With isPublic: true, anyone with the server URL can execute its workflows without a Sim API key. Workspace API keys return 403; use a personal API key or scoped OAuth token.

OAuth scope: api:write.

POST/api/v2/workflow-mcp-servers

Authorization

X-API-Key<token>

Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.

In: header

Request Body

application/json

A new workspace-published MCP server and the workflows it exposes.

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://www.sim.ai/api/v2/workflow-mcp-servers" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",    "name": "Support agents",    "workflowIds": [      "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"    ]  }'
{
  "data": {
    "id": "wfmcp_01J8ZK3QW4M6X2R9T7B5C0V2",
    "name": "Support agents",
    "description": "Ticket triage and escalation workflows.",
    "isPublic": false,
    "mcpServerUrl": "https://www.sim.ai/api/mcp/serve/wfmcp_01J8ZK3QW4M6X2R9T7B5C0V2",
    "createdAt": "2026-06-12T10:30:00.000Z",
    "updatedAt": "2026-06-12T10:30:00.000Z"
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "The request conflicts with the current state of the resource"
  }
}
{
  "error": {
    "code": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "UNSUPPORTED_MEDIA_TYPE",
    "message": "Request body must be sent as application/json"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}
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