Unpublish an MCP server. Every tool it served stops answering and connected clients lose the endpoint. The workflows themselves are untouched — their own deployments stay live and executable through the workflow API. A workspace API key is rejected with 403; use a personal API key.
DELETE
/api/v2/workflow-mcp-servers/{serverId}Authorization
apiKey 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
Path Parameters
serverId*string
Unique workflow-MCP server identifier.
Length
1 <= lengthResponse Body
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
curl -X DELETE "https://www.sim.ai/api/v2/workflow-mcp-servers/string" \ -H "X-API-Key: YOUR_API_KEY"{
"data": {
"id": "wfmcp_01J8ZK3QW4M6X2R9T7B5C0V2",
"deleted": true
}
}{
"error": {
"code": "BAD_REQUEST",
"message": "Invalid request"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "API key required"
}
}{
"error": {
"code": "FORBIDDEN",
"message": "Insufficient workspace permissions",
"details": {
"code": "INSUFFICIENT_WORKSPACE_ROLE"
}
}
}{
"error": {
"code": "NOT_FOUND",
"message": "Not found"
}
}{
"error": {
"code": "CONFLICT",
"message": "API key name already exists"
}
}{
"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"
}
}