{
  "title": "Invoice generator",
  "human_url": "https://happytails.ai/en/business-tools/invoice-generator/",
  "agent_url": "https://happytails.ai/agents/en/business-tools/invoice-generator/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/business-tools/invoice-generator.md",
  "content": "Invoice generator\nEditable line items, discounts, currencies and tax inputs.\nUseful next steps\nQuote generator\nBusiness estimate template with validity and line items.\nPercentage\nFind a percentage of a number.\nDiscount\nCalculate the saving and final price after a discount.\nHow to use Invoice generator\nEnter invoice line items (json) in the input field.\nReview the settings, then choose Run Invoice generator.\nReview the result, then use Copy result or a download link when available.\nWorking with invoice generator\nBusiness utilities help turn supplied details into a consistent document or calculation. Their usefulness depends on accurate names, dates, quantities and terms rather than the visual template alone.\nCommon questions\nDoes a generated document establish legal compliance?\nA template cannot determine all requirements for every jurisdiction or transaction. Check the requirements relevant to the intended use before treating a generated document as final.\nWhy should totals be checked separately?\nRounding, discounts and inclusive or exclusive taxes can affect the final amount. Make the calculation order and currency explicit.\nContinue your workflow:\nQuote generator\n,\nPercentage\n,\nDiscount\n.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Quote generator Business estimate template with validity and line items.",
      "url": "https://happytails.ai/en/business-tools/quote-generator/"
    },
    {
      "name": "Percentage Find a percentage of a number.",
      "url": "https://happytails.ai/en/calculators/percentage/"
    },
    {
      "name": "Discount Calculate the saving and final price after a discount.",
      "url": "https://happytails.ai/en/calculators/discount/"
    }
  ],
  "tool": {
    "id": "invoice-generator",
    "category": "business-tools",
    "built": true,
    "requirements": "Editable line items, discounts, currencies and tax inputs; preview PDF and local saving.",
    "implementation": {
      "fields": [
        {
          "key": "number",
          "label": "Document number",
          "value": "INV-001",
          "type": "text"
        },
        {
          "key": "from",
          "label": "Your business",
          "value": "",
          "type": "text"
        },
        {
          "key": "to",
          "label": "Customer",
          "value": "",
          "type": "text"
        },
        {
          "key": "date",
          "label": "Date",
          "value": "2026-09-28",
          "type": "date"
        },
        {
          "key": "currency",
          "label": "Currency",
          "value": "EUR",
          "type": "text"
        },
        {
          "key": "tax",
          "label": "Tax (%)",
          "value": 0,
          "type": "number"
        }
      ],
      "note": "Basic line-item PDF, with tax added after subtotal and amounts rounded to cents. Review local invoice requirements. Standard font supports basic Latin text.",
      "experience": {
        "automatic": false,
        "single": false,
        "label": "Invoice line items (JSON)",
        "placeholder": "[{\"description\":\"Design work\",\"quantity\":2,\"price\":50}]",
        "help": "Enter a JSON array of items with description, quantity and price. Fill in the business and customer details below. Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/invoice-generator/run",
    "api": {
      "id": "invoice-generator",
      "name": "Invoice generator",
      "category": "business-tools",
      "description": "Editable line items, discounts, currencies and tax inputs.",
      "notes": "Basic line-item PDF, with tax added after subtotal and amounts rounded to cents. Review local invoice requirements. Standard font supports basic Latin text.",
      "human_path": "/en/business-tools/invoice-generator/",
      "method": "POST",
      "endpoint": "/api/v1/tools/invoice-generator/run",
      "schema_url": "/api/v1/tools/invoice-generator",
      "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": {
              "number": {
                "type": "string",
                "description": "Document number",
                "default": "INV-001"
              },
              "from": {
                "type": "string",
                "description": "Your business",
                "default": ""
              },
              "to": {
                "type": "string",
                "description": "Customer",
                "default": ""
              },
              "date": {
                "type": "string",
                "description": "Date",
                "default": "2026-09-28"
              },
              "currency": {
                "type": "string",
                "description": "Currency",
                "default": "EUR"
              },
              "tax": {
                "type": "number",
                "description": "Tax (%)",
                "default": 0.0
              }
            }
          }
        }
      },
      "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": "# Invoice generator\n\n- Human page: https://happytails.ai/en/business-tools/invoice-generator/\n- Markdown: https://happytails.ai/en/business-tools/invoice-generator.md\n- Structured JSON: https://happytails.ai/agents/en/business-tools/invoice-generator/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `invoice-generator` |\n| Category | business-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 | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/invoice-generator/run |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nBasic line-item PDF, with tax added after subtotal and amounts rounded to cents. Review local invoice requirements. Standard font supports basic Latin text.\n\n### Inputs and settings\n\nText input: Invoice line items (JSON).\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\n[{\"description\":\"Design work\",\"quantity\":2,\"price\":50}]\n```\n\nEnter a JSON array of items with description, quantity and price. Fill in the business and customer details below. Up to 1,000,000 characters. Review the settings before running.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `number` | Document number | text | \"INV-001\" |  |\n| `from` | Your business | text | \"\" |  |\n| `to` | Customer | text | \"\" |  |\n| `date` | Date | date | \"2026-09-28\" |  |\n| `currency` | Currency | text | \"EUR\" |  |\n| `tax` | Tax (%) | number | 0 |  |\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/invoice-generator/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/invoice-generator.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        \"number\": {\n          \"type\": \"string\",\n          \"description\": \"Document number\",\n          \"default\": \"INV-001\"\n        },\n        \"from\": {\n          \"type\": \"string\",\n          \"description\": \"Your business\",\n          \"default\": \"\"\n        },\n        \"to\": {\n          \"type\": \"string\",\n          \"description\": \"Customer\",\n          \"default\": \"\"\n        },\n        \"date\": {\n          \"type\": \"string\",\n          \"description\": \"Date\",\n          \"default\": \"2026-09-28\"\n        },\n        \"currency\": {\n          \"type\": \"string\",\n          \"description\": \"Currency\",\n          \"default\": \"EUR\"\n        },\n        \"tax\": {\n          \"type\": \"number\",\n          \"description\": \"Tax (%)\",\n          \"default\": 0.0\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\nEditable line items, discounts, currencies and tax inputs; preview PDF and local saving.\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\": \"invoice-generator\",\n  \"category\": \"business-tools\",\n  \"built\": true,\n  \"requirements\": \"Editable line items, discounts, currencies and tax inputs; preview PDF and local saving.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"number\",\n        \"label\": \"Document number\",\n        \"value\": \"INV-001\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"from\",\n        \"label\": \"Your business\",\n        \"value\": \"\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"to\",\n        \"label\": \"Customer\",\n        \"value\": \"\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"date\",\n        \"label\": \"Date\",\n        \"value\": \"2026-09-28\",\n        \"type\": \"date\"\n      },\n      {\n        \"key\": \"currency\",\n        \"label\": \"Currency\",\n        \"value\": \"EUR\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"tax\",\n        \"label\": \"Tax (%)\",\n        \"value\": 0,\n        \"type\": \"number\"\n      }\n    ],\n    \"note\": \"Basic line-item PDF, with tax added after subtotal and amounts rounded to cents. Review local invoice requirements. Standard font supports basic Latin text.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"label\": \"Invoice line items (JSON)\",\n      \"placeholder\": \"[{\\\"description\\\":\\\"Design work\\\",\\\"quantity\\\":2,\\\"price\\\":50}]\",\n      \"help\": \"Enter a JSON array of items with description, quantity and price. Fill in the business and customer details below. 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/invoice-generator/run\",\n  \"api\": {\n    \"id\": \"invoice-generator\",\n    \"name\": \"Invoice generator\",\n    \"category\": \"business-tools\",\n    \"description\": \"Editable line items, discounts, currencies and tax inputs.\",\n    \"notes\": \"Basic line-item PDF, with tax added after subtotal and amounts rounded to cents. Review local invoice requirements. Standard font supports basic Latin text.\",\n    \"human_path\": \"/en/business-tools/invoice-generator/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/invoice-generator/run\",\n    \"schema_url\": \"/api/v1/tools/invoice-generator\",\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            \"number\": {\n              \"type\": \"string\",\n              \"description\": \"Document number\",\n              \"default\": \"INV-001\"\n            },\n            \"from\": {\n              \"type\": \"string\",\n              \"description\": \"Your business\",\n              \"default\": \"\"\n            },\n            \"to\": {\n              \"type\": \"string\",\n              \"description\": \"Customer\",\n              \"default\": \"\"\n            },\n            \"date\": {\n              \"type\": \"string\",\n              \"description\": \"Date\",\n              \"default\": \"2026-09-28\"\n            },\n            \"currency\": {\n              \"type\": \"string\",\n              \"description\": \"Currency\",\n              \"default\": \"EUR\"\n            },\n            \"tax\": {\n              \"type\": \"number\",\n              \"description\": \"Tax (%)\",\n              \"default\": 0.0\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; 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\nEditable line items, discounts, currencies and tax inputs.\n\n## Useful next steps\n\n- [Quote generator](https://happytails.ai/en/business-tools/quote-generator/): Business estimate template with validity and line items. ([Markdown](https://happytails.ai/en/business-tools/quote-generator.md))\n\n- [Percentage](https://happytails.ai/en/calculators/percentage/): Find a percentage of a number. ([Markdown](https://happytails.ai/en/calculators/percentage.md))\n\n- [Discount](https://happytails.ai/en/calculators/discount/): Calculate the saving and final price after a discount. ([Markdown](https://happytails.ai/en/calculators/discount.md))\n\n## How to use Invoice generator\n\n1. Enter invoice line items (json) in the input field.\n2. Review the settings, then choose Run Invoice generator.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with invoice generator\n\nBusiness utilities help turn supplied details into a consistent document or calculation. Their usefulness depends on accurate names, dates, quantities and terms rather than the visual template alone.\n\n## Common questions\n\n### Does a generated document establish legal compliance?\n\nA template cannot determine all requirements for every jurisdiction or transaction. Check the requirements relevant to the intended use before treating a generated document as final.\n\n### Why should totals be checked separately?\n\nRounding, discounts and inclusive or exclusive taxes can affect the final amount. Make the calculation order and currency explicit.\n\nContinue your workflow: [Quote generator](https://happytails.ai/en/business-tools/quote-generator/), [Percentage](https://happytails.ai/en/calculators/percentage/), [Discount](https://happytails.ai/en/calculators/discount/).\n"
}