Generate a BIP-39 mnemonic API

Generate a fresh BIP-39 seed phrase (12/15/18/21/24 words) using viem's bundled English wordlist with a spec-correct entropy+checksum. Answers 'Give me a new 24-word mnemonic.','What seed phrase can I derive a wallet from?'.

Price$0.01per request

MethodPOST

Route/v1/evm/bip39-generate

StatusLive

MIME typeapplication/json

Rate limit60/minute

CacheNo cache

evmbip39mnemonicseedwallethdwalletcrypto

API URLhttps://x402.hexl.dev/v1/evm/bip39-generate

Integration docs

Example request

{
  "words": 12
}

Example response

{
  "mnemonic": "outer tornado layer worth behind pull network margin explain gaze lava actor",
  "words": 12,
  "strengthBits": 128,
  "wordlist": "english"
}

Input schema

{
  "type": "object",
  "required": [],
  "properties": {
    "words": {
      "type": "number",
      "enum": [
        12,
        15,
        18,
        21,
        24
      ],
      "default": 12,
      "examples": [
        12,
        24
      ]
    }
  },
  "examples": [
    {
      "words": 12
    },
    {
      "words": 24
    }
  ]
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}