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Sign PDF | agent view

The same page content and links, with explicit tool capabilities. Tools marked with an API can run directly through HTTP. Other tools require the browser interface or are not connected yet.

Tool capabilities

{
  "id": "sign-pdf",
  "category": "pdf-tools",
  "built": true,
  "requirements": "Place drawn/uploaded signatures; explicitly distinguish visual signatures from certificate-based signing.",
  "implementation": {
    "fields": [
      {
        "key": "page",
        "label": "Page",
        "value": 1,
        "type": "number"
      },
      {
        "key": "x",
        "label": "X from left (points)",
        "value": 40,
        "type": "number"
      },
      {
        "key": "y",
        "label": "Y from bottom (points)",
        "value": 40,
        "type": "number"
      },
      {
        "key": "width",
        "label": "Signature width (points)",
        "value": 150,
        "type": "number"
      }
    ],
    "files": true,
    "multiple": true,
    "input": false,
    "accept": ".pdf,.png,.jpg,.jpeg",
    "note": "Places an uploaded visual signature. This is not certificate-based digital signing. Select the PDF and signature image together.",
    "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/sign-pdf/run",
  "api": {
    "id": "sign-pdf",
    "name": "Sign PDF",
    "category": "pdf-tools",
    "description": "Place a signature image on a PDF page.",
    "notes": "Places an uploaded visual signature. This is not certificate-based digital signing. Select the PDF and signature image together.",
    "human_path": "/en/pdf-tools/sign-pdf/",
    "method": "POST",
    "endpoint": "/api/v1/tools/sign-pdf/run",
    "schema_url": "/api/v1/tools/sign-pdf",
    "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": {
            "page": {
              "type": "number",
              "description": "Page",
              "default": 1.0
            },
            "x": {
              "type": "number",
              "description": "X from left (points)",
              "default": 40.0
            },
            "y": {
              "type": "number",
              "description": "Y from bottom (points)",
              "default": 40.0
            },
            "width": {
              "type": "number",
              "description": "Signature width (points)",
              "default": 150.0
            }
          }
        },
        "files": {
          "type": "array",
          "maxItems": 20,
          "items": {
            "type": "object",
            "required": [
              "name",
              "base64"
            ],
            "additionalProperties": false,
            "properties": {
              "name": {
                "type": "string",
                "maxLength": 200,
                "description": "Filename only, no path."
              },
              "mime": {
                "type": "string",
                "maxLength": 150
              },
              "bytes": {
                "type": "integer",
                "minimum": 0,
                "description": "Optional decoded byte count; must match content if supplied."
              },
              "base64": {
                "type": "string",
                "contentEncoding": "base64",
                "description": "File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size."
              }
            }
          }
        }
      }
    },
    "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": 20,
      "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"
  }
}

Page guide

Place a signature image on a PDF page.

Useful next steps

How to use Sign PDF

  1. Choose one or more files in PDF, PNG or JPEG.
  2. Review the settings, then choose Run Sign PDF.
  3. Review the result, then use Copy result or a download link when available.

What to expect

Place a signature image on a PDF page. Choose one PDF and one PNG or JPEG signature image. Set the page, position, and image width in PDF points. This adds a visual signature, not certificate-based digital signing.