Security

Secure Random Generator

Generate cryptographically secure random key material driven by entropy budget — request N bits of entropy, get hex/base64/base64url output. Also supports custom-alphabet strings via crypto.randomInt (rejection-sampled, no modulo bias). Use this instead of Math.random()-based tools for any secret/key/token.

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Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/secure-random-generator' \
  -H 'Content-Type: application/json' \
  -d '{"entropyBits":256,"encoding":"hex","customAlphabet":"","customLength":32,"count":1}'

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/secure-random-generator

Parameters

Name	Type	Required	Description
entropyBits	number	No	—
encoding	select	No	—
customAlphabet	text	No	—
customLength	number	No	—
count	number	No	—

Response format

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-secure-random-generator": {
      "name": "secure-random-generator",
      "description": "Generate cryptographically secure random key material driven by entropy budget — request N bits of entropy, get hex/base64/base64url output. Also supports custom-alphabet strings via crypto.randomInt (rejection-sampled, no modulo bias). Use this instead of Math.random()-based tools for any secret/key/token.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=secure-random-generator",
      "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": "secure-random-generator",
    "arguments": {
  "entropyBits": 256,
  "encoding": "hex",
  "customAlphabet": "",
  "customLength": 32,
  "count": 1
}
  }
}

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).

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Secure Random Generator

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curl -X POST 'https://api.elysiatools.com/en/api/tools/secure-random-generator' \ -H 'Content-Type: application/json' \ -d '{"entropyBits":256,"encoding":"hex","customAlphabet":"","customLength":32,"count":1}'

Name

Type

Required

Description

entropyBits

number

—

encoding

select

—

customAlphabet

text

—

customLength

number

—

count

number

—

{ "mcpServers": { "elysiatools-secure-random-generator": { "name": "secure-random-generator", "description": "Generate cryptographically secure random key material driven by entropy budget — request N bits of entropy, get hex/base64/base64url output. Also supports custom-alphabet strings via crypto.randomInt (rejection-sampled, no modulo bias). Use this instead of Math.random()-based tools for any secret/key/token.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=secure-random-generator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "secure-random-generator", "arguments": { "entropyBits": 256, "encoding": "hex", "customAlphabet": "", "customLength": 32, "count": 1 } } }