Text Processing

Capitalize Sentences

Capitalize only the first letter of each sentence while preserving all other letters exactly as typed. Fixes sentence starts without disturbing acronyms, proper nouns, or intentional mixed-case.

text· Text resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/capitalize-sentences' \
  -H 'Content-Type: application/json' \
  -d '{"text":"hello WORLD. this is COOL. NASA rocks!"}'

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/capitalize-sentences

Parameters

Name	Type	Required	Description
text	textarea	Yes	—

Response format

Text result

JSON

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

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-capitalize-sentences": {
      "name": "capitalize-sentences",
      "description": "Capitalize only the first letter of each sentence while preserving all other letters exactly as typed. Fixes sentence starts without disturbing acronyms, proper nouns, or intentional mixed-case.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=capitalize-sentences",
      "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": "capitalize-sentences",
    "arguments": {
  "text": "hello WORLD. this is COOL. NASA rocks!"
}
  }
}

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).

Questions or issues? Contact [email protected]

Browse tools Open tool

Name

Type

Required

Description

text

textarea

Yes

—

{ "mcpServers": { "elysiatools-capitalize-sentences": { "name": "capitalize-sentences", "description": "Capitalize only the first letter of each sentence while preserving all other letters exactly as typed. Fixes sentence starts without disturbing acronyms, proper nouns, or intentional mixed-case.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=capitalize-sentences", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }