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customerMerge

mutation

Requires write_customer_merge access scope.

Merges two customers.

Arguments

Anchor to customerOneIdcustomerOneId • ID!required: The ID of the first customer that will be merged.
Anchor to customerTwoIdcustomerTwoId • ID!required: The ID of the second customer that will be merged.
Anchor to overrideFieldsoverrideFields • CustomerMergeOverrideFields: The fields to override the default customer merge rules.

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Anchor to CustomerMergePayload returnsCustomerMergePayload returns

Anchor to jobjob • Job: The asynchronous job for merging the customers.
Anchor to resultingCustomerIdresultingCustomerId • ID: The ID of the customer resulting from the merge.
Anchor to userErrorsuserErrors • [CustomerMergeUserError!]!non-null: The list of errors that occurred from executing the mutation.

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Merge customers with override fields
Merge two customers
customerMerge reference

Examples

Open in GraphiQL

const { admin } = await authenticate.admin(request);

const response = await admin.graphql(

`#graphql

mutation CustomerMerge {

customerMerge(customerOneId: "gid://shopify/Customer/544365967", customerTwoId: "gid://shopify/Customer/624407574", overrideFields: {customerIdOfFirstNameToKeep: "gid://shopify/Customer/544365967", customerIdOfLastNameToKeep: "gid://shopify/Customer/624407574"}) {

resultingCustomerId

job {

done

}

userErrors {

code

field

message

}

}`,

{

variables: {

"customerOneId": "gid://shopify/Customer/544365967",

"customerTwoId": "gid://shopify/Customer/624407574",

"overrideFields": {

"customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",

"customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"

}

);

const data = await response.json();

mutation CustomerMerge {
  customerMerge(customerOneId: "gid://shopify/Customer/544365967", customerTwoId: "gid://shopify/Customer/624407574", overrideFields: {customerIdOfFirstNameToKeep: "gid://shopify/Customer/544365967", customerIdOfLastNameToKeep: "gid://shopify/Customer/624407574"}) {
    resultingCustomerId
    job {
      id
      done
    }
    userErrors {
      code
      field
      message
    }
  }
}

curl -X POST \
https://your-development-store.myshopify.com/admin/api/2025-04/graphql.json \
-H 'Content-Type: application/json' \
-H 'X-Shopify-Access-Token: {access_token}' \
-d '{
"query": "mutation CustomerMerge { customerMerge(customerOneId: \"gid://shopify/Customer/544365967\", customerTwoId: \"gid://shopify/Customer/624407574\", overrideFields: {customerIdOfFirstNameToKeep: \"gid://shopify/Customer/544365967\", customerIdOfLastNameToKeep: \"gid://shopify/Customer/624407574\"}) { resultingCustomerId job { id done } userErrors { code field message } } }",
 "variables": {
    "customerOneId": "gid://shopify/Customer/544365967",
    "customerTwoId": "gid://shopify/Customer/624407574",
    "overrideFields": {
      "customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",
      "customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"
    }
  }
}'

const { admin } = await authenticate.admin(request);

const response = await admin.graphql(
  `#graphql
  mutation CustomerMerge {
    customerMerge(customerOneId: "gid://shopify/Customer/544365967", customerTwoId: "gid://shopify/Customer/624407574", overrideFields: {customerIdOfFirstNameToKeep: "gid://shopify/Customer/544365967", customerIdOfLastNameToKeep: "gid://shopify/Customer/624407574"}) {
      resultingCustomerId
      job {
        id
        done
      }
      userErrors {
        code
        field
        message
      }
    }
  }`,
  {
    variables: {
      "customerOneId": "gid://shopify/Customer/544365967",
      "customerTwoId": "gid://shopify/Customer/624407574",
      "overrideFields": {
        "customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",
        "customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"
      }
    },
  },
);

const data = await response.json();

const client = new shopify.clients.Graphql({session});
const data = await client.query({
  data: {
    "query": `mutation CustomerMerge {
      customerMerge(customerOneId: "gid://shopify/Customer/544365967", customerTwoId: "gid://shopify/Customer/624407574", overrideFields: {customerIdOfFirstNameToKeep: "gid://shopify/Customer/544365967", customerIdOfLastNameToKeep: "gid://shopify/Customer/624407574"}) {
        resultingCustomerId
        job {
          id
          done
        }
        userErrors {
          code
          field
          message
        }
      }
    }`,
    "variables": {
      "customerOneId": "gid://shopify/Customer/544365967",
      "customerTwoId": "gid://shopify/Customer/624407574",
      "overrideFields": {
        "customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",
        "customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"
      }
    },
  },
});

session = ShopifyAPI::Auth::Session.new(
  shop: "your-development-store.myshopify.com",
  access_token: access_token
)
client = ShopifyAPI::Clients::Graphql::Admin.new(
  session: session
)

query = <<~QUERY
  mutation CustomerMerge {
    customerMerge(customerOneId: "gid://shopify/Customer/544365967", customerTwoId: "gid://shopify/Customer/624407574", overrideFields: {customerIdOfFirstNameToKeep: "gid://shopify/Customer/544365967", customerIdOfLastNameToKeep: "gid://shopify/Customer/624407574"}) {
      resultingCustomerId
      job {
        id
        done
      }
      userErrors {
        code
        field
        message
      }
    }
  }
QUERY

variables = {
  "customerOneId": "gid://shopify/Customer/544365967",
  "customerTwoId": "gid://shopify/Customer/624407574",
  "overrideFields": {
    "customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",
    "customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"
  }
}

response = client.query(query: query, variables: variables)

Input variables

JSON

{

"customerOneId": "gid://shopify/Customer/544365967",

"customerTwoId": "gid://shopify/Customer/624407574",

"overrideFields": {

"customerIdOfFirstNameToKeep": "gid://shopify/Customer/544365967",

"customerIdOfLastNameToKeep": "gid://shopify/Customer/544365967"

}

Response

JSON

{

"customerMerge": {

"resultingCustomerId": "gid://shopify/Customer/624407574",

"job": {

"id": "gid://shopify/Job/ab22429a-ea18-4dad-ac2c-5823288b1e59",

"done": true

"userErrors": []

}