Health

Due Date Calculator

Calculate pregnancy due date based on last period or conception date

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/due-date-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"calculationMethod":"last-period","lastPeriodDate":"2024-01-01","conceptionDate":"Select conception date"}'

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/due-date-calculator

Parameters

Name	Type	Required	Description
calculationMethod	select	Yes	—
lastPeriodDate	date	Yes	—
conceptionDate	date	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "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-due-date-calculator": {
      "name": "due-date-calculator",
      "description": "Calculate pregnancy due date based on last period or conception date",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=due-date-calculator",
      "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": "due-date-calculator",
    "arguments": {
  "calculationMethod": "last-period",
  "lastPeriodDate": "2024-01-01",
  "conceptionDate": "Select conception date"
}
  }
}

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

curl -X POST 'https://api.elysiatools.com/en/api/tools/due-date-calculator' \ -H 'Content-Type: application/json' \ -d '{"calculationMethod":"last-period","lastPeriodDate":"2024-01-01","conceptionDate":"Select conception date"}'

Name

Type

Required

Description

calculationMethod

select

Yes

—

lastPeriodDate

date

Yes

—

conceptionDate

date

—

{ "mcpServers": { "elysiatools-due-date-calculator": { "name": "due-date-calculator", "description": "Calculate pregnancy due date based on last period or conception date", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=due-date-calculator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "due-date-calculator", "arguments": { "calculationMethod": "last-period", "lastPeriodDate": "2024-01-01", "conceptionDate": "Select conception date" } } }