Delete a custom tool. Agent blocks retain their configuration but can no longer call the deleted tool.
DELETE
/api/v2/custom-tools/{id}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
id*string
Unique custom tool identifier.
Length
1 <= lengthQuery Parameters
workspaceId*string
Workspace that owns the custom tool.
Length
1 <= length <= 128Response Body
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/custom-tools/string?workspaceId=string" \ -H "X-API-Key: YOUR_API_KEY"{
"data": {
"id": "V1StGXR8Z5jdHi6BmyT",
"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": "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"
}
}