Document Tools

PDF Stamp Annotations

Apply visual stamp overlays like REVIEWED, CONFIDENTIAL, or DRAFT to selected pages

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/pdf-stamp-annotations' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"inputPdf.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/pdf-stamp-annotations' \
  -F 'inputPdf=/Users/quyue/www/elysia-tools/public/samples/pdf/pdf-2026-02-11-source-2pages.pdf' \
  -F 'scope=all' \
  -F 'customPages=2,4,6-8' \
  -F 'textPreset=reviewed' \
  -F 'customText=LEGAL HOLD' \
  -F 'position=top-right' \
  -F 'style=outline' \
  -F 'stampColor=#C73131' \
  -F 'rotateDeg=-18' \
  -F 'opacity=0.74' \
  -F 'margin=28' \
  -F 'withDate=true'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/pdf-stamp-annotations

Parameters

Name	Type	Required	Description
inputPdf	fileupload required	Yes	—
scope	select	No	—
customPages	text	No	—
textPreset	select	No	—
customText	text	No	—
position	select	No	—
style	select	No	—
stampColor	color	No	—
rotateDeg	number	No	—
opacity	number	No	—
margin	number	No	—
withDate	checkbox	No	—

File-type parameters must be uploaded first via POST /upload/pdf-stamp-annotations, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-pdf-stamp-annotations": {
      "name": "pdf-stamp-annotations",
      "description": "Apply visual stamp overlays like REVIEWED, CONFIDENTIAL, or DRAFT to selected pages",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=pdf-stamp-annotations",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "pdf-stamp-annotations",
    "arguments": {
  "inputPdf": "/Users/quyue/www/elysia-tools/public/samples/pdf/pdf-2026-02-11-source-2pages.pdf",
  "scope": "all",
  "customPages": "2,4,6-8",
  "textPreset": "reviewed",
  "customText": "LEGAL HOLD",
  "position": "top-right",
  "style": "outline",
  "stampColor": "#C73131",
  "rotateDeg": -18,
  "opacity": 0.74,
  "margin": 28,
  "withDate": true
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]