{
  "title": "Text classifier",
  "human_url": "https://happytails.ai/en/data-tools/text-classifier/",
  "agent_url": "https://happytails.ai/agents/en/data-tools/text-classifier/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/data-tools/text-classifier.md",
  "content": "Text classifier\nAssign your chosen labels to each line of text.\nHow to use Text classifier\nEnter your text in the input field.\nReview the settings, then choose Run Text classifier.\nReview the result, then use Copy result or a download link when available.\nWhat to expect\nAssign your chosen labels to each line of text. Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [],
  "tool": {
    "id": "text-classifier",
    "category": "data-tools",
    "built": true,
    "requirements": "Categorize supplied text rows using user-defined labels and examples; include uncertain category and editable results; preserve row IDs; do not treat model scores as calibrated probabilities.",
    "implementation": {
      "fields": [
        {
          "key": "labels",
          "label": "Category labels, separated by commas",
          "type": "text",
          "value": "positive, negative, neutral"
        }
      ],
      "files": false,
      "accept": "",
      "multiple": false,
      "input": true,
      "processing": "Server required",
      "native": true,
      "ai": true,
      "maxFileBytes": 20971520,
      "note": "Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.",
      "experience": {
        "automatic": false,
        "single": false,
        "label": "Your text",
        "placeholder": "Type or paste your input…",
        "help": "Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/text-classifier/run",
    "api": {
      "id": "text-classifier",
      "name": "Text classifier",
      "category": "data-tools",
      "description": "Assign your chosen labels to each line of text.",
      "notes": "Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.",
      "human_path": "/en/data-tools/text-classifier/",
      "method": "POST",
      "endpoint": "/api/v1/tools/text-classifier/run",
      "schema_url": "/api/v1/tools/text-classifier",
      "input_schema": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "input": {
            "type": "string",
            "maxLength": 1000000,
            "default": "",
            "description": "Plain text input. File tools use files instead unless otherwise documented."
          },
          "options": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
              "labels": {
                "type": "string",
                "description": "Category labels, separated by commas",
                "default": "positive, negative, neutral"
              }
            }
          }
        }
      },
      "output_schema": {
        "type": "object",
        "required": [
          "tool",
          "result"
        ],
        "properties": {
          "tool": {
            "type": "string"
          },
          "result": {
            "type": "object",
            "required": [
              "text",
              "files"
            ],
            "properties": {
              "text": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "data": {
                "description": "Parsed JSON when the textual result is JSON."
              },
              "name": {
                "type": "string"
              },
              "mime": {
                "type": "string"
              },
              "files": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": [
                    "name",
                    "mime",
                    "bytes",
                    "base64"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "mime": {
                      "type": "string"
                    },
                    "bytes": {
                      "type": "integer"
                    },
                    "base64": {
                      "type": "string",
                      "contentEncoding": "base64"
                    }
                  }
                }
              }
            }
          }
        }
      },
      "processing": "Server; self-hosted native engine, no external conversion service",
      "limits": {
        "request_bytes": 31457280,
        "input_characters": 1000000,
        "files_bytes": 20971520,
        "max_files": 0,
        "timeout_seconds": 90
      }
    },
    "agent_processing": "Server; self-hosted native engine, no external conversion service",
    "browser_agent": {
      "supported": true,
      "name": "run_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Text classifier\n\n- Human page: https://happytails.ai/en/data-tools/text-classifier/\n- Markdown: https://happytails.ai/en/data-tools/text-classifier.md\n- Structured JSON: https://happytails.ai/agents/en/data-tools/text-classifier/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `text-classifier` |\n| Category | data-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Server required |\n| HTTP API | /api/v1/tools/text-classifier/run |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nRuns with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nType or paste your input…\n```\n\nUp to 1,000,000 characters. Review the settings before running.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `labels` | Category labels, separated by commas | text | \"positive, negative, neutral\" |  |\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/text-classifier/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/text-classifier.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 31457280 |\n| input_characters | 1000000 |\n| files_bytes | 20971520 |\n| max_files | 0 |\n| timeout_seconds | 90 |\n\n#### Complete input schema\n\n```json\n{\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"properties\": {\n    \"input\": {\n      \"type\": \"string\",\n      \"maxLength\": 1000000,\n      \"default\": \"\",\n      \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"labels\": {\n          \"type\": \"string\",\n          \"description\": \"Category labels, separated by commas\",\n          \"default\": \"positive, negative, neutral\"\n        }\n      }\n    }\n  }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n  \"type\": \"object\",\n  \"required\": [\n    \"tool\",\n    \"result\"\n  ],\n  \"properties\": {\n    \"tool\": {\n      \"type\": \"string\"\n    },\n    \"result\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"text\",\n        \"files\"\n      ],\n      \"properties\": {\n        \"text\": {\n          \"type\": [\n            \"string\",\n            \"null\"\n          ]\n        },\n        \"data\": {\n          \"description\": \"Parsed JSON when the textual result is JSON.\"\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"mime\": {\n          \"type\": \"string\"\n        },\n        \"files\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"required\": [\n              \"name\",\n              \"mime\",\n              \"bytes\",\n              \"base64\"\n            ],\n            \"properties\": {\n              \"name\": {\n                \"type\": \"string\"\n              },\n              \"mime\": {\n                \"type\": \"string\"\n              },\n              \"bytes\": {\n                \"type\": \"integer\"\n              },\n              \"base64\": {\n                \"type\": \"string\",\n                \"contentEncoding\": \"base64\"\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nCategorize supplied text rows using user-defined labels and examples; include uncertain category and editable results; preserve row IDs; do not treat model scores as calibrated probabilities.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"text-classifier\",\n  \"category\": \"data-tools\",\n  \"built\": true,\n  \"requirements\": \"Categorize supplied text rows using user-defined labels and examples; include uncertain category and editable results; preserve row IDs; do not treat model scores as calibrated probabilities.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"labels\",\n        \"label\": \"Category labels, separated by commas\",\n        \"type\": \"text\",\n        \"value\": \"positive, negative, neutral\"\n      }\n    ],\n    \"files\": false,\n    \"accept\": \"\",\n    \"multiple\": false,\n    \"input\": true,\n    \"processing\": \"Server required\",\n    \"native\": true,\n    \"ai\": true,\n    \"maxFileBytes\": 20971520,\n    \"note\": \"Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Type or paste your input…\",\n      \"help\": \"Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/text-classifier/run\",\n  \"api\": {\n    \"id\": \"text-classifier\",\n    \"name\": \"Text classifier\",\n    \"category\": \"data-tools\",\n    \"description\": \"Assign your chosen labels to each line of text.\",\n    \"notes\": \"Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.\",\n    \"human_path\": \"/en/data-tools/text-classifier/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/text-classifier/run\",\n    \"schema_url\": \"/api/v1/tools/text-classifier\",\n    \"input_schema\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"input\": {\n          \"type\": \"string\",\n          \"maxLength\": 1000000,\n          \"default\": \"\",\n          \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n        },\n        \"options\": {\n          \"type\": \"object\",\n          \"additionalProperties\": false,\n          \"properties\": {\n            \"labels\": {\n              \"type\": \"string\",\n              \"description\": \"Category labels, separated by commas\",\n              \"default\": \"positive, negative, neutral\"\n            }\n          }\n        }\n      }\n    },\n    \"output_schema\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"tool\",\n        \"result\"\n      ],\n      \"properties\": {\n        \"tool\": {\n          \"type\": \"string\"\n        },\n        \"result\": {\n          \"type\": \"object\",\n          \"required\": [\n            \"text\",\n            \"files\"\n          ],\n          \"properties\": {\n            \"text\": {\n              \"type\": [\n                \"string\",\n                \"null\"\n              ]\n            },\n            \"data\": {\n              \"description\": \"Parsed JSON when the textual result is JSON.\"\n            },\n            \"name\": {\n              \"type\": \"string\"\n            },\n            \"mime\": {\n              \"type\": \"string\"\n            },\n            \"files\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": \"object\",\n                \"required\": [\n                  \"name\",\n                  \"mime\",\n                  \"bytes\",\n                  \"base64\"\n                ],\n                \"properties\": {\n                  \"name\": {\n                    \"type\": \"string\"\n                  },\n                  \"mime\": {\n                    \"type\": \"string\"\n                  },\n                  \"bytes\": {\n                    \"type\": \"integer\"\n                  },\n                  \"base64\": {\n                    \"type\": \"string\",\n                    \"contentEncoding\": \"base64\"\n                  }\n                }\n              }\n            }\n          }\n        }\n      }\n    },\n    \"processing\": \"Server; self-hosted native engine, no external conversion service\",\n    \"limits\": {\n      \"request_bytes\": 31457280,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 20971520,\n      \"max_files\": 0,\n      \"timeout_seconds\": 90\n    }\n  },\n  \"agent_processing\": \"Server; self-hosted native engine, no external conversion service\",\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nAssign your chosen labels to each line of text.\n\n## How to use Text classifier\n\n1. Enter your text in the input field.\n2. Review the settings, then choose Run Text classifier.\n3. Review the result, then use Copy result or a download link when available.\n\n## What to expect\n\nAssign your chosen labels to each line of text. Runs with local model weights on this website’s server. No external AI API is used. Review the result for errors. One text item per line. Review uncertain classifications.\n"
}