> ## Documentation Index
> Fetch the complete documentation index at: https://cobo.com/developers/llms.txt
> Use this file to discover all available pages before exploring further.

# Check address validity across chains

> This operation verifies if a given address is valid for a list of chains.

<Note>You can specify up to 20 chain IDs in a single request.</Note>


<Tip>
  Try [Cobo WaaS Skill](/v2/guides/overview/cobo-waas-skill) in your AI coding assistant (Claude Code, Cursor, etc.). Describe your needs in natural language to auto-generate production-ready SDK code and debug faster 🚀
</Tip>

<RequestExample>
  ```python Python theme={null}
  import cobo_waas2
  from cobo_waas2.models.check_address_chains_validity200_response_inner import (
      CheckAddressChainsValidity200ResponseInner,
  )
  from cobo_waas2.rest import ApiException
  from pprint import pprint

  # See configuration.py for a list of all supported configurations.
  configuration = cobo_waas2.Configuration(
      # Replace `<YOUR_PRIVATE_KEY>` with your private key
      api_private_key="<YOUR_PRIVATE_KEY>",
      # Select the development environment. To use the production environment, change the URL to https://api.cobo.com/v2.
      host="https://api.dev.cobo.com/v2",
  )
  # Enter a context with an instance of the API client
  with cobo_waas2.ApiClient(configuration) as api_client:
      # Create an instance of the API class
      api_instance = cobo_waas2.WalletsApi(api_client)
      address = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
      chain_ids = "BTC,ETH"

      try:
          # Check address validity across chains
          api_response = api_instance.check_address_chains_validity(address, chain_ids)
          print("The response of WalletsApi->check_address_chains_validity:\n")
          pprint(api_response)
      except Exception as e:
          print(
              "Exception when calling WalletsApi->check_address_chains_validity: %s\n" % e
          )

  ```

  ```java Java theme={null}
  // Import classes:
  import com.cobo.waas2.ApiClient;
  import com.cobo.waas2.ApiException;
  import com.cobo.waas2.Configuration;
  import com.cobo.waas2.Env;
  import com.cobo.waas2.api.WalletsApi;
  import com.cobo.waas2.model.*;

  public class Example {
    public static void main(String[] args) {
      ApiClient defaultClient = Configuration.getDefaultApiClient();
      // Select the development environment. To use the production environment, replace `Env.DEV` with
      // `Env.PROD
      defaultClient.setEnv(Env.DEV);

      // Replace `<YOUR_PRIVATE_KEY>` with your private key
      defaultClient.setPrivKey("<YOUR_PRIVATE_KEY>");
      WalletsApi apiInstance = new WalletsApi();
      String address = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045";
      String chainIds = "BTC,ETH";
      try {
        List<CheckAddressChainsValidity200ResponseInner> result =
            apiInstance.checkAddressChainsValidity(address, chainIds);
        System.out.println(result);
      } catch (ApiException e) {
        System.err.println("Exception when calling WalletsApi#checkAddressChainsValidity");
        System.err.println("Status code: " + e.getCode());
        System.err.println("Reason: " + e.getResponseBody());
        System.err.println("Response headers: " + e.getResponseHeaders());
        e.printStackTrace();
      }
    }
  }

  ```

  ```go Go theme={null}
  package main

  import (
  	"context"
  	"fmt"
  	coboWaas2 "github.com/CoboGlobal/cobo-waas2-go-sdk/cobo_waas2"
  	"github.com/CoboGlobal/cobo-waas2-go-sdk/cobo_waas2/crypto"
  	"os"
  )

  func main() {
  	address := "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
  	chainIds := "BTC,ETH"

  	configuration := coboWaas2.NewConfiguration()
  	// Initialize the API client
  	apiClient := coboWaas2.NewAPIClient(configuration)
  	ctx := context.Background()

  	// Select the development environment. To use the production environment, replace coboWaas2.DevEnv with coboWaas2.ProdEnv
  	ctx = context.WithValue(ctx, coboWaas2.ContextEnv, coboWaas2.DevEnv)
  	// Replace `<YOUR_PRIVATE_KEY>` with your private key
  	ctx = context.WithValue(ctx, coboWaas2.ContextPortalSigner, crypto.Ed25519Signer{
  		Secret: "<YOUR_PRIVATE_KEY>",
  	})
  	resp, r, err := apiClient.WalletsAPI.CheckAddressChainsValidity(ctx).
  		Address(address).
  		ChainIds(chainIds).
  		Execute()
  	if err != nil {
  		fmt.Fprintf(
  			os.Stderr,
  			"Error when calling `WalletsAPI.CheckAddressChainsValidity``: %v\n",
  			err,
  		)
  		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
  	}
  	// response from `CheckAddressChainsValidity`: []CheckAddressChainsValidity200ResponseInner
  	fmt.Fprintf(os.Stdout, "Response from `WalletsAPI.CheckAddressChainsValidity`: %v\n", resp)
  }

  ```

  ```javascript JavaScript theme={null}
  const CoboWaas2 = require("@cobo/cobo-waas2");
  // Initialize the API client
  const apiClient = CoboWaas2.ApiClient.instance;
  // Select the development environment. To use the production environment, replace `Env.DEV` with `Env.PROD`
  apiClient.setEnv(CoboWaas2.Env.DEV);
  // Replace `<YOUR_PRIVATE_KEY>` with your private key
  apiClient.setPrivateKey("<YOUR_PRIVATE_KEY>");
  // Call the API
  const apiInstance = new CoboWaas2.WalletsApi();
  const address = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045";
  const chain_ids = "BTC,ETH";
  apiInstance.checkAddressChainsValidity(address, chain_ids).then(
    (data) => {
      console.log("API called successfully. Returned data: " + data);
    },
    (error) => {
      console.error(error);
    },
  );

  ```
</RequestExample>


## OpenAPI

````yaml get /wallets/check_address_chains_validity
openapi: 3.0.3
info:
  title: Cobo Wallet as a Service 2.0
  description: >
    The Cobo Wallet-as-a-Service (WaaS) 2.0 API is the latest version of Cobo's
    WaaS API offering. It enables you to access Cobo's full suite of crypto
    wallet technologies with powerful and flexible access controls. By
    encapsulating complex security protocols and streamlining blockchain
    interactions, this API allows you to concentrate on your core business
    activities without worrying about the safety of your assets. The WaaS 2.0
    API presents the following key features:


    - A unified API for Cobo's [all four wallet
    types](https://manuals.cobo.com/en/portal/introduction#an-all-in-one-wallet-platform)

    - Support for 80+ chains and 3000+ tokens

    - A comprehensive selection of webhook events

    - Flexible usage models for MPC Wallets, including [Organization-Controlled
    Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/ocw/introduction)
    and [User-Controlled
    Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/ucw/introduction)

    - Programmatic control of smart contract wallets such as Safe{Wallet} with
    fine-grained access controls

    - Seamlessly transfer funds across multiple exchanges, including Binance,
    OKX, Bybit, Deribit, and more


    For more information about the WaaS 2.0 API, see [Introduction to WaaS
    2.0](https://www.cobo.com/developers/v2/guides/overview/introduction).
  termsOfService: https://cobo.com/waas/tos/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
  contact:
    name: Cobo WaaS
    url: https://www.cobo.com/waas
    email: help@cobo.com
  version: 1.0.0
servers:
  - url: https://api.dev.cobo.com/v2
    description: Development environment
  - url: https://api.cobo.com/v2
    description: Production environment
security:
  - CoboAuth: []
tags:
  - name: Organizations
    description: Operations related to Organizations.
  - name: Wallets
    description: Operations related to all wallets.
  - name: Wallets - MPC Wallets
    description: Operations related to mpc wallet.
  - name: Wallets - Exchange Wallet
    description: Operations related to exchange wallet.
  - name: Wallets - Smart Contract Wallets
    description: Operations related to smart contract wallet.
  - name: Transactions
    description: Operations related to all transactions.
  - name: Developers - Webhooks
    description: Operations related to webhooks.
  - name: Stakings
    description: Operations related to staking.
  - name: OAuth
    description: Operations related to OAuth.
  - name: Developers
    description: Operations related to developers.
  - name: AddressBooks
    description: Operations related to address books.
  - name: TravelRule
    description: Operations related to travel rule.
  - name: GraphQL
    description: Operations related to executing GraphQL queries and mutations.
  - name: PrimeBroker
    description: Operations related to prime broker.
  - name: AppWorkflows
    description: Operations related to app workflow.
  - name: FeeStation
    description: Operations related to fee station.
  - name: Payment
    description: Operations related to payment.
  - name: Batch Payouts
    description: Operations related to batch payouts.
  - name: Tokenization
    description: Operations related to tokenization.
  - name: AutoSweep
    description: Operations related to auto sweep.
  - name: Compliance
    description: Operations related to compliance.
paths:
  /wallets/check_address_chains_validity:
    get:
      tags:
        - Wallets
      summary: Check address validity across chains
      description: >
        This operation verifies if a given address is valid for a list of
        chains.


        <Note>You can specify up to 20 chain IDs in a single request.</Note>
      operationId: check_address_chains_validity
      parameters:
        - $ref: '#/components/parameters/requiredAddressParam'
        - $ref: '#/components/parameters/requiredChainIdListParam'
      responses:
        '200':
          $ref: '#/components/responses/checkAddressChainsValidityResponse'
        4XX:
          $ref: '#/components/responses/badRequestError'
        5XX:
          $ref: '#/components/responses/internalServerError'
components:
  parameters:
    requiredAddressParam:
      name: address
      in: query
      required: true
      description: The wallet address.
      schema:
        type: string
        description: The wallet address.
      example: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'
    requiredChainIdListParam:
      name: chain_ids
      in: query
      required: true
      description: >-
        A list of chain IDs, separated by comma. The chain ID is the unique
        identifier of a blockchain. You can retrieve the IDs of all the chains
        you can use by calling [List enabled
        chains](https://www.cobo.com/developers/v2/api-references/wallets/list-enabled-chains).
      schema:
        type: string
        description: A list of chain IDs, separated by comma.
      example: BTC,ETH
  responses:
    checkAddressChainsValidityResponse:
      description: The request was successful.
      content:
        application/json:
          schema:
            type: array
            items:
              type: object
              required:
                - chain_id
                - validity
              properties:
                chain_id:
                  type: string
                  description: >-
                    The chain ID, which is the unique identifier of a
                    blockchain.
                  example: ETH
                validity:
                  type: boolean
                  description: |
                    Whether the address is valid for the specified chain.
                     - `true`: The address is valid.
                     - `false`: The address is invalid.
                  example: true
    badRequestError:
      description: >-
        Bad request. Your request contains malformed syntax or invalid
        parameters.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    internalServerError:
      description: Internal server error.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    ErrorResponse:
      type: object
      description: The response of a failed request.
      required:
        - error_code
        - error_message
        - error_id
      properties:
        error_code:
          type: integer
          description: >-
            The error code. Refer to [Error codes and status
            codes](https://www.cobo.com/developers/v2/api-references/error-codes)
            for more details.
        error_message:
          type: string
          description: The error description.
        error_id:
          type: string
          description: >-
            The error log ID. You can provide the error ID when submitting a
            ticket to help Cobo to locate the issue.
          example: 0b6ddf19083c4bd1a9ca01bec44b24dd
  securitySchemes:
    CoboAuth:
      type: apiKey
      in: header
      name: BIZ-API-KEY
      description: >
        The API key. For more details, refer to [API
        key](https://www.cobo.com/developers/v2/guides/overview/cobo-auth#api-key).


        In the API playground, enter your [API
        secret](https://www.cobo.com/developers/v2/guides/overview/cobo-auth#api-secret),
        and your API key will be accordingly calculated.

````