---
updatedAt: 2025-11-05T21:12:38.000Z
agentTools:
  projectIndex: https://developers.short.io/llms.txt
---

# Append a single tag to the links in bulk

# OpenAPI definition

```json
{
  "openapi": "3.1.0",
  "info": {
    "title": "Short.io API",
    "version": "1.0.0"
  },
  "components": {
    "securitySchemes": {
      "apiKey": {
        "type": "apiKey",
        "name": "Authorization",
        "in": "header"
      }
    }
  },
  "paths": {
    "/tags/bulk": {
      "post": {
        "summary": "Append a single tag to the links in bulk",
        "tags": [
          "Link Management"
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "tag": {
                    "type": "string"
                  },
                  "link_ids": {
                    "type": "array",
                    "items": {
                      "pattern": "^lnk_(.*)_(.*)$",
                      "description": "Link ID",
                      "type": "string",
                      "example": "lnk_abc123_abcdef"
                    }
                  }
                },
                "required": [
                  "tag",
                  "link_ids"
                ]
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Default Response"
          }
        }
      }
    }
  },
  "servers": [
    {
      "url": "https://api.short.io",
      "description": "API server"
    }
  ],
  "security": [
    {
      "apiKey": []
    }
  ],
  "x-readme": {
    "explorer-enabled": true,
    "proxy-enabled": true
  }
}
```