invowerk

endpoint

https://api.invowerk.dev/mcp/

protocol

streamable-http ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is invowerk live?

Yes — it answered the hub's last check (checked 2h ago). It answered 99% of checks over the last 30 days.

Is invowerk free to use?

Not anonymously — it asks for a key or a login before it will serve. Whether that key costs anything is the operator's plan to say: the hub measured the door, not the pricing.

What tools does invowerk have?

6 tools: validate_invoice, explain_errors, convert_invoice, parse_invoice, render_invoice, generate_invoice.

Is invowerk safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• generate_invoice reads auth-required 17h ago

  Create a valid EN 16931 e-invoice (UBL or CII XML) from JSON. Input: `invoice` is a JSON object keyed on EN 16931 Business Terms, the same schema as `POST /v1/generate`, at most 4 MB. Main fields: `syntax` ("ubl" default, or "cii"), `flavor` ("en16931" default, or "xrechnung", which requires `buyer_reference`, the Leitweg-ID BT-10, and `payment_iban`), `invoice_number`, `issue_date` (YYYY-MM-DD), `currency`, `seller`, `buyer`, `lines`, `tax_breakdown`, `totals`. invowerk writes your amounts as given. It does not compute or correct them. Input that breaks an EN 16931 or XRechnung rule returns an error naming each rule, e.g. BT-112 = BT-109 + BT-110 (BR-CO-15). Dates are YYYY-MM-DD, amounts go up to 999,999,999.99. Returns `xml`, `syntax`, `flavor` and `self_validation`. invowerk checks the XML before answering and never returns an invalid document. Invalid input, or XML that fails the check, returns an error, as does a busy (`engine_busy`) or overrunning (`engine_timeout`) generate. Credits: 5 per call.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "invoice"
    ],
    "properties": {
      "invoice": {
        "type": "object",
        "description": "The invoice as a JSON object keyed on EN 16931 Business Terms, the schema of POST /v1/generate and of parse_invoice's `model`: syntax, flavor, invoice_number, issue_date, currency, seller, buyer, lines, tax_breakdown, totals.",
        "additionalProperties": true
      }
    },
    "additionalProperties": false
  }

  arguments 14 lines copy
• validate_invoice reads unknown 8h ago

  Check an e-invoice against EN 16931 and German rules. Input: `invoice_base64` is the base64 of an XML invoice (UBL or CII) or a ZUGFeRD / Factur-X PDF, at most 4 MB decoded; or pass the file as a download link in `file`. `explain=true` adds an explanation to findings whose rule has one, in `lang` ("de" or "en"). `valid` is the result. For XRechnung the KoSIT validator decides. If it is unreachable, invowerk's own check with the same rules decides, `verdict_source` is "local" and `official_degraded` is true. `disagreement` is true when both ran and differ. `findings` lists each problem with `rule_id`, `severity` and `message`; pass the codes to `explain_errors` (free). `pdfa_verdict` is the PDF/A check of a PDF. `hints` never change `valid`. Unreadable input returns a finding, not an error. It fails with an error when the check is busy (`engine_busy`), ran longer than 20 s (`engine_timeout`) or the XML has more than 100,000 elements (`document_too_complex`). Credits: 1 per call.

  mcp-tool

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  {
    "type": "object",
    "properties": {
      "file": {
        "type": "object",
        "default": null,
        "required": [
          "download_url",
          "file_id"
        ],
        "properties": {
          "file_id": {
            "type": "string",
            "description": "An identifier for the file. ChatGPT sets it; other clients may pass any label, such as the file name."
          },
          "file_name": {
            "type": "string"
          },
          "mime_type": {
            "type": "string"
          },
          "download_url": {
            "type": "string",
            "description": "A public https URL of the file."
          }
        },
        "description": "The file as a download link, instead of `invoice_base64`. In ChatGPT, pass the user's uploaded file here. Other clients can set `download_url` to a public https URL."
      },
      "lang": {
        "enum": [
          "de",
          "en"
        ],
        "type": "string",
        "default": "de",
        "description": "Language of the explanations: \"de\" (default) or \"en\"."
      },
      "explain": {
        "type": "boolean",
        "default": false,
        "description": "true adds an explanation to each finding whose rule has one."
      },
      "invoice_base64": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "The invoice file, base64-encoded. At most 4 MB decoded."
      }
    },
    "additionalProperties": false
  }

  arguments 57 lines copy
• explain_errors reads unknown 17h ago

  Explain rule codes in plain language. Works without an API key. Covers the codes of `validate_invoice` findings and hints: EN 16931, XRechnung, ZUGFeRD and invowerk's own hint codes (IW-*). Input: `codes` is a list of one or more codes, e.g. ["BR-CO-18", "BR-DE-21"]. Duplicates are removed. `lang` is "de" (default) or "en". Returns `lang` and `explanations`. Each explanation has `title`, `meaning`, `causes`, `fixes`, `severity`, `standard`, `bt_refs`, `xpath_hints` and `explain_url` (the German page for the code). If any code is unknown, the call fails and names the unknown codes. Credits: free. This tool is not metered.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "codes"
    ],
    "properties": {
      "lang": {
        "enum": [
          "de",
          "en"
        ],
        "type": "string",
        "default": "de",
        "description": "Language of the explanations: \"de\" (default) or \"en\"."
      },
      "codes": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "description": "One or more rule codes from validate_invoice, e.g. [\"BR-CO-18\", \"BR-DE-21\"]."
      }
    },
    "additionalProperties": false
  }

  arguments 25 lines copy
• convert_invoice reads unknown 17h ago

  Convert an e-invoice to UBL or CII. The result is checked before it is returned. Input: `invoice_base64` is the base64 of an XML invoice or a ZUGFeRD / Factur-X PDF, at most 4 MB decoded; or pass the file as a download link in `file`. `target_syntax` is "ubl" or "cii". `target_flavor` is optional, "en16931" or "xrechnung"; without it the flavor of the source is kept. Returns `xml`, `syntax`, `flavor` and `self_validation` (`valid`, `finding_count`). invowerk checks the converted XML before answering and never returns an invalid document. Input that cannot be read or converted fails with an error message. Credits: 3 per call.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "target_syntax"
    ],
    "properties": {
      "file": {
        "type": "object",
        "default": null,
        "required": [
          "download_url",
          "file_id"
        ],
        "properties": {
          "file_id": {
            "type": "string",
            "description": "An identifier for the file. ChatGPT sets it; other clients may pass any label, such as the file name."
          },
          "file_name": {
            "type": "string"
          },
          "mime_type": {
            "type": "string"
          },
          "download_url": {
            "type": "string",
            "description": "A public https URL of the file."
          }
        },
        "description": "The file as a download link, instead of `invoice_base64`. In ChatGPT, pass the user's uploaded file here. Other clients can set `download_url` to a public https URL."
      },
      "target_flavor": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Optional: \"en16931\" or \"xrechnung\". Without it the flavor of the source is kept."
      },
      "target_syntax": {
        "type": "string",
        "description": "Syntax to convert to: \"ubl\" or \"cii\"."
      },
      "invoice_base64": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "The invoice file, base64-encoded. At most 4 MB decoded."
      }
    },
    "additionalProperties": false
  }

  arguments 62 lines copy
• parse_invoice reads unknown 8h ago

  Read an existing e-invoice into JSON keyed on EN 16931 Business Terms. The JSON is the input format of `generate_invoice`, so you can edit it and create the invoice again. Input: `invoice_base64` is the base64 of an XML invoice (UBL or CII) or a ZUGFeRD / Factur-X PDF, at most 4 MB decoded; or pass the file as a download link in `file`. A PDF may have at most 500 pages and 16 attachments. Returns `model` (the invoice as JSON), `detection` (`syntax`, `flavor`, `customization_id`) and `source` ("xml" or "pdf-embedded"). A file that cannot be read fails with an error that starts with an error code, e.g. a PDF without embedded XML, a UBL credit note, malformed XML, or a busy (`engine_busy`) or overrunning (`engine_timeout`) read. Credits: 2 per call.

  mcp-tool

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  {
    "type": "object",
    "properties": {
      "file": {
        "type": "object",
        "default": null,
        "required": [
          "download_url",
          "file_id"
        ],
        "properties": {
          "file_id": {
            "type": "string",
            "description": "An identifier for the file. ChatGPT sets it; other clients may pass any label, such as the file name."
          },
          "file_name": {
            "type": "string"
          },
          "mime_type": {
            "type": "string"
          },
          "download_url": {
            "type": "string",
            "description": "A public https URL of the file."
          }
        },
        "description": "The file as a download link, instead of `invoice_base64`. In ChatGPT, pass the user's uploaded file here. Other clients can set `download_url` to a public https URL."
      },
      "invoice_base64": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "The invoice file, base64-encoded. At most 4 MB decoded."
      }
    },
    "additionalProperties": false
  }

  arguments 43 lines copy
• render_invoice reads unknown 8h ago

  Render an XML e-invoice (UBL or CII, e.g. XRechnung) as a readable HTML page. invowerk uses the KoSIT XRechnung visualization. Use it to show a person what an e-invoice contains. Input: `invoice_base64` is the base64 of the XML, at most 4 MB decoded, or pass the file as a download link in `file`. PDFs are not accepted. `lang` sets the label language, "de" (default) or "en". Returns `html` (a complete HTML document), `lang`, `flavor` (e.g. "xrechnung") and `syntax` (e.g. "ubl_invoice"). A file that is not an XML invoice, malformed XML or XML with a DOCTYPE fails with an error message, and so does a busy (`engine_busy`) or overrunning (`engine_timeout`) render. Credits: 1 per call.

  mcp-tool

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  {
    "type": "object",
    "properties": {
      "file": {
        "type": "object",
        "default": null,
        "required": [
          "download_url",
          "file_id"
        ],
        "properties": {
          "file_id": {
            "type": "string",
            "description": "An identifier for the file. ChatGPT sets it; other clients may pass any label, such as the file name."
          },
          "file_name": {
            "type": "string"
          },
          "mime_type": {
            "type": "string"
          },
          "download_url": {
            "type": "string",
            "description": "A public https URL of the file."
          }
        },
        "description": "The file as a download link, instead of `invoice_base64`. In ChatGPT, pass the user's uploaded file here. Other clients can set `download_url` to a public https URL."
      },
      "lang": {
        "enum": [
          "de",
          "en"
        ],
        "type": "string",
        "default": "de",
        "description": "Language of the labels: \"de\" (default) or \"en\"."
      },
      "invoice_base64": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "The invoice file, base64-encoded. At most 4 MB decoded."
      }
    },
    "additionalProperties": false
  }

  arguments 52 lines copy

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.