{
  "title": "Chmod calculator",
  "human_url": "https://happytails.ai/en/developer-tools/chmod-calculator/",
  "agent_url": "https://happytails.ai/agents/en/developer-tools/chmod-calculator/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/developer-tools/chmod-calculator.md",
  "content": "Chmod calculator\nNumeric and symbolic Unix permission mapping.\nUseful next steps\nJSON schema validator\nDialect-aware validation with exact instance paths and local reference resolution.\nJsonpath tester\nShow matched paths and values.\nYAML formatter\nPin YAML version.\nHow to use Chmod calculator\nEnter octal permissions in the input field.\nThe result updates as you type. Adjust the available settings if needed.\nReview the result, then use Copy result or a download link when available.\nWorking with chmod calculator\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\nCommon questions\nDoes valid JSON mean the data is correct?\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\nIs decoding the same as decrypting or verifying?\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\nContinue your workflow:\nJSON schema validator\n,\nJsonpath tester\n,\nYAML formatter\n.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "JSON schema validator Dialect-aware validation with exact instance paths and local reference resolution.",
      "url": "https://happytails.ai/en/developer-tools/json-schema-validator/"
    },
    {
      "name": "Jsonpath tester Show matched paths and values.",
      "url": "https://happytails.ai/en/developer-tools/jsonpath-tester/"
    },
    {
      "name": "YAML formatter Pin YAML version.",
      "url": "https://happytails.ai/en/developer-tools/yaml-formatter/"
    }
  ],
  "tool": {
    "id": "chmod-calculator",
    "category": "developer-tools",
    "built": true,
    "requirements": "Numeric and symbolic Unix permission mapping; special bits and file-versus-directory meaning.",
    "implementation": {
      "fields": [],
      "experience": {
        "automatic": true,
        "single": true,
        "label": "Octal permissions",
        "placeholder": "755",
        "help": "Enter three octal digits, each from 0 to 7. Results update as you type. Up to 1,000,000 characters.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/chmod-calculator/run",
    "api": {
      "id": "chmod-calculator",
      "name": "Chmod calculator",
      "category": "developer-tools",
      "description": "Numeric and symbolic Unix permission mapping.",
      "notes": "",
      "human_path": "/en/developer-tools/chmod-calculator/",
      "method": "POST",
      "endpoint": "/api/v1/tools/chmod-calculator/run",
      "schema_url": "/api/v1/tools/chmod-calculator",
      "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": {}
          }
        }
      },
      "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; same transformation code as browser tools",
      "limits": {
        "request_bytes": 8388608,
        "input_characters": 1000000,
        "files_bytes": 5242880,
        "max_files": 0,
        "timeout_seconds": 12
      }
    },
    "agent_processing": "Server; same transformation code as browser tools",
    "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": "# Chmod calculator\n\n- Human page: https://happytails.ai/en/developer-tools/chmod-calculator/\n- Markdown: https://happytails.ai/en/developer-tools/chmod-calculator.md\n- Structured JSON: https://happytails.ai/agents/en/developer-tools/chmod-calculator/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `chmod-calculator` |\n| Category | developer-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Automatic updates after valid input or file selection. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/chmod-calculator/run |\n| Browser-agent interface | run_current_tool |\n\n### Inputs and settings\n\nText input: Octal permissions.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\n755\n```\n\nEnter three octal digits, each from 0 to 7. Results update as you type. Up to 1,000,000 characters.\n\nNo additional settings are declared for this tool.\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/chmod-calculator/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/chmod-calculator.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 8388608 |\n| input_characters | 1000000 |\n| files_bytes | 5242880 |\n| max_files | 0 |\n| timeout_seconds | 12 |\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    }\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\nNumeric and symbolic Unix permission mapping; special bits and file-versus-directory meaning.\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\": \"chmod-calculator\",\n  \"category\": \"developer-tools\",\n  \"built\": true,\n  \"requirements\": \"Numeric and symbolic Unix permission mapping; special bits and file-versus-directory meaning.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": true,\n      \"label\": \"Octal permissions\",\n      \"placeholder\": \"755\",\n      \"help\": \"Enter three octal digits, each from 0 to 7. Results update as you type. Up to 1,000,000 characters.\",\n      \"action\": null\n    },\n    \"mode\": \"automatic\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/chmod-calculator/run\",\n  \"api\": {\n    \"id\": \"chmod-calculator\",\n    \"name\": \"Chmod calculator\",\n    \"category\": \"developer-tools\",\n    \"description\": \"Numeric and symbolic Unix permission mapping.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/developer-tools/chmod-calculator/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/chmod-calculator/run\",\n    \"schema_url\": \"/api/v1/tools/chmod-calculator\",\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        }\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; same transformation code as browser tools\",\n    \"limits\": {\n      \"request_bytes\": 8388608,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 5242880,\n      \"max_files\": 0,\n      \"timeout_seconds\": 12\n    }\n  },\n  \"agent_processing\": \"Server; same transformation code as browser tools\",\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\nNumeric and symbolic Unix permission mapping.\n\n## Useful next steps\n\n- [JSON schema validator](https://happytails.ai/en/developer-tools/json-schema-validator/): Dialect-aware validation with exact instance paths and local reference resolution. ([Markdown](https://happytails.ai/en/developer-tools/json-schema-validator.md))\n\n- [Jsonpath tester](https://happytails.ai/en/developer-tools/jsonpath-tester/): Show matched paths and values. ([Markdown](https://happytails.ai/en/developer-tools/jsonpath-tester.md))\n\n- [YAML formatter](https://happytails.ai/en/developer-tools/yaml-formatter/): Pin YAML version. ([Markdown](https://happytails.ai/en/developer-tools/yaml-formatter.md))\n\n## How to use Chmod calculator\n\n1. Enter octal permissions in the input field.\n2. The result updates as you type. Adjust the available settings if needed.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with chmod calculator\n\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\n\n## Common questions\n\n### Does valid JSON mean the data is correct?\n\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\n\n### Is decoding the same as decrypting or verifying?\n\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\n\nContinue your workflow: [JSON schema validator](https://happytails.ai/en/developer-tools/json-schema-validator/), [Jsonpath tester](https://happytails.ai/en/developer-tools/jsonpath-tester/), [YAML formatter](https://happytails.ai/en/developer-tools/yaml-formatter/).\n"
}