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Shannon Diversity Index (H′ = −Σpᵢ·ln pᵢ)

Compute Shannon H′ from species counts with H′max and Pielou evenness, in ln, log₂, or log₁₀ base.

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/shannon-diversity-index' \
  -H 'Content-Type: application/json' \
  -d '{"counts":"40\n25\n20\n10\n5","base":"ln"}'

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/shannon-diversity-index

Parameters

Name	Type	Required	Description
counts	textarea	Yes	One abundance count per species, separated by new lines, commas, or spaces.
base	select	Yes	—

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-shannon-diversity-index": {
      "name": "shannon-diversity-index",
      "description": "Compute Shannon H′ from species counts with H′max and Pielou evenness, in ln, log₂, or log₁₀ base.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=shannon-diversity-index",
      "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": "shannon-diversity-index",
    "arguments": {
  "counts": "40\n25\n20\n10\n5",
  "base": "ln"
}
  }
}

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

counts

textarea

Yes

One abundance count per species, separated by new lines, commas, or spaces.

base

select

Yes

—

{ "mcpServers": { "elysiatools-shannon-diversity-index": { "name": "shannon-diversity-index", "description": "Compute Shannon H′ from species counts with H′max and Pielou evenness, in ln, log₂, or log₁₀ base.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=shannon-diversity-index", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }