---
updatedAt: 2025-06-25T21:55:41.000Z
agentTools:
  projectIndex: https://docs.nftgo.io/llms.txt
---

# Get Blur Auth Challenge

Use this API to obtain a Blur sign message. Once received, sign the message using the user's wallet and then submit the signature to the GetBlurAuth API.

# OpenAPI definition

```json
{
  "openapi": "3.0.1",
  "info": {
    "title": "NFT Trading",
    "description": "",
    "version": "1.0.0"
  },
  "tags": [
    {
      "name": "gem-fetcher/utils/v1/blur"
    }
  ],
  "paths": {
    "/utils/v1/blur/get-auth-challenge": {
      "post": {
        "summary": "Get Blur Auth Challenge",
        "x-apifox-folder": "gem-fetcher/utils/v1/blur",
        "x-apifox-status": "developing",
        "deprecated": false,
        "description": "Use this API to obtain a Blur sign message. Once received, sign the message using the user's wallet and then submit the signature to the GetBlurAuth API.",
        "tags": [
          "gem-fetcher/utils/v1/blur"
        ],
        "parameters": [],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "address": {
                    "type": "string",
                    "description": "User Address that requests the blurAuth",
                    "default": "0x3D74B1784e3341Ab179546B02feccCFD313D9265"
                  }
                },
                "x-apifox-orders": [
                  "address"
                ],
                "required": [
                  "address"
                ],
                "x-apifox-ignore-properties": []
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Successful Response",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "code": {
                      "type": "string"
                    },
                    "msg": {
                      "type": "string"
                    },
                    "data": {
                      "type": "object",
                      "properties": {
                        "message": {
                          "type": "string",
                          "description": "Blur message to sign"
                        },
                        "wallet_address": {
                          "type": "string",
                          "description": "User address"
                        },
                        "expires_on": {
                          "type": "string",
                          "description": "When the sign message will expire"
                        },
                        "hmac": {
                          "type": "string",
                          "description": "Authentication code"
                        }
                      },
                      "x-apifox-orders": [
                        "message",
                        "wallet_address",
                        "expires_on",
                        "hmac"
                      ],
                      "required": [
                        "message",
                        "hmac",
                        "expires_on",
                        "wallet_address"
                      ],
                      "x-apifox-ignore-properties": []
                    }
                  },
                  "x-apifox-orders": [
                    "code",
                    "msg",
                    "data"
                  ],
                  "required": [
                    "code",
                    "data",
                    "msg"
                  ],
                  "x-apifox-ignore-properties": []
                },
                "examples": {
                  "1": {
                    "summary": "Successful Response",
                    "value": {
                      "status_code": 200,
                      "code": "SUCCESS",
                      "msg": "success",
                      "data": {
                        "message": "Sign in to Blur\n\nChallenge: 18c8159a6b01b5781146f44681b7d43d1bdd1acbaf791584ade0803b60b00025",
                        "wallet_address": "0x3d74b1784e3341ab179546b02fecccfd313d9265",
                        "expires_on": "2023-07-27T09:18:20.368Z",
                        "hmac": "18c8159a6b01b5781146f44681b7d43d1bdd1acbaf791584ade0803b60b00025"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        "x-run-in-apifox": "https://apifox.com/web/project/2272262/apis/api-97211750-run"
      }
    }
  },
  "components": {
    "securitySchemes": {
      "ApiKeyAuth": {
        "type": "apiKey",
        "in": "header",
        "name": "X-API-KEY"
      }
    }
  },
  "servers": [
    {
      "url": "https://data-api.nftgo.io"
    }
  ],
  "x-readme": {
    "explorer-enabled": true,
    "proxy-enabled": true,
    "samples-enabled": true
  },
  "security": [
    {
      "ApiKeyAuth": []
    }
  ]
}
```