List Tools

List the built-in tools available in a workspace. Built-in tools only: a workspace’s MCP tools are discovered per server on List MCP Server Tools, and its code-backed custom tools are on List Custom Tools. A tool is available when a block the caller can see exposes it, so the same allowlist and visibility rules as List Blocks apply.

GET/api/v2/tools

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

Query Parameters

workspaceId*string

Workspace whose integration allowlist, revealed preview blocks, and deployed custom blocks decide what this catalog contains.

Length1 <= length <= 128
search?string

Case-insensitive substring match against the tool id, name, and description.

Length1 <= length <= 200
hostedApiKey?string

Restrict to tools by how their API key is supplied.

Value in"always" | "conditional" | "none"
oauthProvider?string

Restrict to tools that authenticate against this OAuth service.

Length1 <= length <= 255
sortBy?string

Field used to sort the result. Sorting by name is case-sensitive and follows the storage collation, so do not rely on a case-insensitive order.

Default"id"
Value in"id" | "name"
sortOrder?string

Sort direction.

Default"asc"
Value in"asc" | "desc"
limit?integer

Maximum tools to return per page. Must be a whole number from 1 to 100. Defaults to 50.

Default50
Range1 <= value <= 100
cursor?string

Opaque cursor from the previous page. Send it back with the same sort and filters; only limit may change. Change anything else and pagination must restart without a cursor.

Length1 <= length

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X GET "https://www.sim.ai/api/v2/tools?workspaceId=string" \  -H "X-API-Key: YOUR_API_KEY"
{
  "data": [
    {
      "id": "slack_message",
      "name": "Slack Send Message",
      "description": "Send a message to a Slack channel.",
      "version": "1.0.0",
      "hostedApiKey": "none",
      "oauth": {
        "required": true,
        "provider": "slack",
        "requiredScopes": [
          "chat:write"
        ]
      }
    }
  ],
  "nextCursor": null
}
{
  "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"
  }
}