---
updatedAt: 2026-05-27T08:52:35.000Z
agentTools:
  projectIndex: https://docs.tatum.io/llms.txt
---

# Generate Cronos private key

<p style="display: none">/v3/cronos/wallet/priv</p>
<h4>1 credit per API call.</h4><br/>
<p>Generates the private key of an address from a mnemonic for a given derivation path index. The private key is generated for the specific index - each mnemonic
can generate up to 2^32 private keys starting from index 0 until 2^31 - 1.</p>


# OpenAPI definition

```json
{
  "openapi": "3.1.0",
  "servers": [
    {
      "url": "https://api.tatum.io"
    }
  ],
  "info": {
    "version": "3.18.3",
    "title": "Blockchain"
  },
  "tags": [
    {
      "description": "<p>Cronos is an EVM-based blockchain which gives developers secure decentralized access to high-integrity data from other chains and the internet.\n    <br/>\n    Tatum supports 2 chains:\n    <ul>\n      <li>Cronos Mainnet is a regular live chain. The explorer can be found at <a target=\"_blank\" href=\"https://cronoscan.com/\">https://cronoscan.com/</a>.</li>\n      <li>Cronos Testnet is a testing chain for developers. The explorer can be found at <a target=\"_blank\" href=\"https://explorer.cronos.org/testnet\">https://explorer.cronos.org/testnet</a>.</li> \n    </ul>\n</p>\n",
      "name": "Cronos - Tatum API"
    }
  ],
  "paths": {
    "/v3/cronos/wallet/priv": {
      "post": {
        "description": "<p style=\"display: none\">/v3/cronos/wallet/priv</p>\n<h4>1 credit per API call.</h4><br/>\n<p>Generates the private key of an address from a mnemonic for a given derivation path index. The private key is generated for the specific index - each mnemonic\ncan generate up to 2^32 private keys starting from index 0 until 2^31 - 1.</p>\n",
        "operationId": "CronosGenerateAddressPrivateKey",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/PrivKeyRequest"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/PrivKey"
                }
              }
            },
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/Error400"
          },
          "401": {
            "$ref": "#/components/responses/Error401"
          },
          "500": {
            "$ref": "#/components/responses/Error500"
          }
        },
        "security": [
          {
            "X-API-Key": []
          }
        ],
        "x-codeSamples": [],
        "summary": "Generate Cronos private key",
        "tags": [
          "Cronos - Tatum API"
        ]
      }
    }
  },
  "components": {
    "schemas": {
      "Error400": {
        "properties": {
          "errorCode": {
            "example": "validation.failed",
            "description": "validation.failed",
            "type": "string"
          },
          "message": {
            "example": "Request validation failed. Please see data for additional information.",
            "description": "Request validation failed. Please see data for additional information.",
            "type": "string"
          },
          "statusCode": {
            "example": 400,
            "description": "400",
            "type": "number"
          },
          "data": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "target"
              ],
              "properties": {
                "target": {
                  "type": "object",
                  "additionalProperties": true,
                  "description": "Request object present in the body of the HTTP request",
                  "example": {
                    "property": 12345
                  }
                },
                "value": {
                  "type": "number",
                  "description": "Value of the target object which validation is wrong. Can be of any data type, example here is using type number.",
                  "example": 12345
                },
                "property": {
                  "type": "string",
                  "description": "Property name of the target object which validation is wrong",
                  "example": "property1"
                },
                "constraints": {
                  "type": "object",
                  "additionalProperties": true,
                  "description": "Object of failed constraints for the target object. Key is the constraint, value is detailed description of the failed constraint.",
                  "example": {
                    "min": "property1 must not be less than 50000"
                  }
                }
              }
            }
          }
        },
        "required": [
          "errorCode",
          "message",
          "statusCode",
          "data"
        ],
        "type": "object"
      },
      "Error401Invalid": {
        "properties": {
          "errorCode": {
            "example": "subscription.invalid",
            "description": "subscription.invalid",
            "type": "string"
          },
          "message": {
            "example": "Unable to find valid subscription for '${apiKey}'",
            "description": "Unable to find valid subscription for '${apiKey}'",
            "type": "string"
          },
          "statusCode": {
            "example": 401,
            "description": "401",
            "type": "number"
          }
        },
        "required": [
          "errorCode",
          "message",
          "statusCode"
        ],
        "type": "object"
      },
      "Error401NotActive": {
        "properties": {
          "errorCode": {
            "example": "subscription.not.active",
            "description": "subscription.not.active",
            "type": "string"
          },
          "message": {
            "example": "Subscription not active anymore.",
            "description": "Subscription not active anymore.",
            "type": "string"
          },
          "statusCode": {
            "example": 401,
            "description": "401",
            "type": "number"
          }
        },
        "required": [
          "errorCode",
          "message",
          "statusCode"
        ],
        "type": "object"
      },
      "Error500": {
        "properties": {
          "message": {
            "example": "Internal server error",
            "description": "Internal server error",
            "type": "string"
          },
          "statusCode": {
            "example": 500,
            "description": "500",
            "type": "number"
          }
        },
        "required": [
          "statusCode",
          "message"
        ],
        "type": "object"
      },
      "PrivKey": {
        "type": "object",
        "properties": {
          "key": {
            "description": "Generated private key.",
            "example": "cTmS2jBWXgFaXZ2xG9jhn67TiyTshnMp3UedamzEhGm6BZV1vLgQ",
            "type": "string"
          }
        }
      },
      "PrivKeyRequest": {
        "type": "object",
        "properties": {
          "index": {
            "description": "Derivation index of private key to generate.",
            "example": 0,
            "maximum": 2147483647,
            "type": "integer"
          },
          "mnemonic": {
            "maxLength": 500,
            "minLength": 1,
            "description": "Mnemonic to generate private key from.",
            "example": "urge pulp usage sister evidence arrest palm math please chief egg abuse",
            "type": "string"
          }
        },
        "required": [
          "mnemonic",
          "index"
        ]
      }
    },
    "responses": {
      "Error400": {
        "description": "Bad Request",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error400"
            }
          }
        }
      },
      "Error401": {
        "description": "Unauthorized. Not valid or inactive subscription key present in the HTTP Header.",
        "content": {
          "application/json": {
            "schema": {
              "oneOf": [
                {
                  "$ref": "#/components/schemas/Error401NotActive"
                },
                {
                  "$ref": "#/components/schemas/Error401Invalid"
                }
              ]
            }
          }
        }
      },
      "Error500": {
        "description": "Internal server error. There was an error on the server during the processing of the request.",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error500"
            }
          }
        }
      }
    },
    "securitySchemes": {
      "X-API-Key": {
        "type": "apiKey",
        "name": "x-api-key",
        "in": "header",
        "description": "Your **API key** is used to identify your account & your plan, including the number of API calls per second and total monthly calls you have.\n\nEach key is for individual use only.\n\nIf you don't have a key already you can [Sign up for a Free Tatum account](https://co.tatum.io/signup) to get two keys (testnet and mainnet), allowing up to 5 API calls per second and 1,000,000 Credits.\n\nFor testing purposes, you can use the following key which only works inside docs and has limited functionality (e.g. you cannot create virtual accounts or notification subscriptions with it):\n* t-66a730ccccfd17001c479705-2f597d14ad7543f289a03418\n\nFor more details on limits and plans, [click here](https://docs.tatum.io/docs/plans-limits).\n"
      }
    }
  }
}
```