> ## 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. # List supported chains > This operation retrieves all chains supported by a specific wallet type or subtype. It provides details such as the chain ID, chain symbol, and other relevant information. If you do not specify a wallet type, this operation returns a combination of chains supported by each wallet type. You can filter the result by chain IDs. The chain metadata is publicly available without any permission restrictions. Cobo Portal currently supports over 80 blockchains and more than 3,000 tokens. In addition to this operation, you can also view the full list of supported chains [here](https://www.cobo.com/chains). We regularly update the list with new additions. If you want to request support for a specific chain or token, please [contact us](https://www.cobo.com/contact). 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 🚀 ```python Python theme={null} import cobo_waas2 from cobo_waas2.models.list_supported_chains200_response import ( ListSupportedChains200Response, ) from cobo_waas2.models.wallet_subtype import WalletSubtype from cobo_waas2.models.wallet_type import WalletType 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 `` with your private key api_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) wallet_type = cobo_waas2.WalletType() wallet_subtype = cobo_waas2.WalletSubtype() chain_ids = "BTC,ETH" limit = 10 before = "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1" after = "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk" try: # List supported chains api_response = api_instance.list_supported_chains( wallet_type=wallet_type, wallet_subtype=wallet_subtype, chain_ids=chain_ids, limit=limit, before=before, after=after, ) print("The response of WalletsApi->list_supported_chains:\n") pprint(api_response) except Exception as e: print("Exception when calling WalletsApi->list_supported_chains: %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 `` with your private key defaultClient.setPrivKey(""); WalletsApi apiInstance = new WalletsApi(); WalletType walletType = WalletType.fromValue("Custodial"); WalletSubtype walletSubtype = WalletSubtype.fromValue("Asset"); String chainIds = "BTC,ETH"; Integer limit = 10; String before = "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1"; String after = "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk"; try { ListSupportedChains200Response result = apiInstance.listSupportedChains( walletType, walletSubtype, chainIds, limit, before, after); System.out.println(result); } catch (ApiException e) { System.err.println("Exception when calling WalletsApi#listSupportedChains"); 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() { walletType := coboWaas2.WalletType("Custodial") walletSubtype := coboWaas2.WalletSubtype("Asset") chainIds := "BTC,ETH" limit := int32(10) before := "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1" after := "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk" 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 `` with your private key ctx = context.WithValue(ctx, coboWaas2.ContextPortalSigner, crypto.Ed25519Signer{ Secret: "", }) resp, r, err := apiClient.WalletsAPI.ListSupportedChains(ctx). WalletType(walletType). WalletSubtype(walletSubtype). ChainIds(chainIds). Limit(limit). Before(before). After(after). Execute() if err != nil { fmt.Fprintf(os.Stderr, "Error when calling `WalletsAPI.ListSupportedChains``: %v\n", err) fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r) } // response from `ListSupportedChains`: ListSupportedChains200Response fmt.Fprintf(os.Stdout, "Response from `WalletsAPI.ListSupportedChains`: %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 `` with your private key apiClient.setPrivateKey(""); // Call the API const apiInstance = new CoboWaas2.WalletsApi(); const opts = { wallet_type: "Custodial", wallet_subtype: "Asset", chain_ids: "BTC,ETH", limit: 10, before: "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1", after: "RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk", }; apiInstance.listSupportedChains(opts).then( (data) => { console.log("API called successfully. Returned data: " + data); }, (error) => { console.error(error); }, ); ``` ## OpenAPI ````yaml get /wallets/chains 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/chains: get: tags: - Wallets summary: List supported chains description: > This operation retrieves all chains supported by a specific wallet type or subtype. It provides details such as the chain ID, chain symbol, and other relevant information. If you do not specify a wallet type, this operation returns a combination of chains supported by each wallet type. You can filter the result by chain IDs. The chain metadata is publicly available without any permission restrictions. Cobo Portal currently supports over 80 blockchains and more than 3,000 tokens. In addition to this operation, you can also view the full list of supported chains [here](https://www.cobo.com/chains). We regularly update the list with new additions. If you want to request support for a specific chain or token, please [contact us](https://www.cobo.com/contact). operationId: list_supported_chains parameters: - $ref: '#/components/parameters/optionalWalletTypeParam' - $ref: '#/components/parameters/optionalWalletSubtypeParam' - $ref: '#/components/parameters/optionalChainIdListWithLimitParam' - $ref: '#/components/parameters/limit500Param' - $ref: '#/components/parameters/beforeParam' - $ref: '#/components/parameters/afterParam' responses: '200': $ref: '#/components/responses/getChainsResponse' 4XX: $ref: '#/components/responses/badRequestError' 5XX: $ref: '#/components/responses/internalServerError' components: parameters: optionalWalletTypeParam: name: wallet_type in: query required: false description: > The wallet type. - `Custodial`: [Custodial Wallets](https://manuals.cobo.com/en/portal/custodial-wallets/introduction) - `MPC`: [MPC Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/introduction) - `SmartContract`: [Smart Contract Wallets](https://manuals.cobo.com/en/portal/smart-contract-wallets/introduction) - `Exchange`: [Exchange Wallets](https://manuals.cobo.com/en/portal/exchange-wallets/introduction) schema: $ref: '#/components/schemas/WalletType' optionalWalletSubtypeParam: name: wallet_subtype in: query required: false description: | The wallet subtype. - `Asset`: Custodial Wallets (Asset Wallets) - `Web3`: Custodial Wallets (Web3 Wallets) - `Main`: Exchange Wallets (Main Account) - `Sub`: Exchange Wallets (Sub Account) - `Org-Controlled`: MPC Wallets (Organization-Controlled Wallets) - `User-Controlled`: MPC Wallets (User-Controlled Wallets) - `Safe{Wallet}`: Smart Contract Wallets (Safe{Wallet}) schema: $ref: '#/components/schemas/WalletSubtype' optionalChainIdListWithLimitParam: name: chain_ids in: query required: false description: >- A list of chain IDs(Supports up to 500), 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 limit500Param: name: limit in: query description: The maximum number of objects to return. The value range is [1, 500]. required: false schema: type: integer format: int32 default: 10 example: 10 beforeParam: name: before in: query description: > A cursor indicating the position before the current page. This value is generated by Cobo and returned in the response. If you are paginating forward from the beginning, you do not need to provide it on the first request. When paginating backward (to the previous page), you should pass the before value returned from the last response. required: false schema: type: string example: RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1 afterParam: name: after in: query description: > A cursor indicating the position after the current page. This value is generated by Cobo and returned in the response. You do not need to provide it on the first request. When paginating forward (to the next page), you should pass the after value returned from the last response. required: false schema: type: string example: RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk responses: getChainsResponse: description: The request was successful. content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/ChainInfo' pagination: $ref: '#/components/schemas/Pagination' 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: WalletType: type: string enum: - Custodial - MPC - SmartContract - Exchange example: Custodial description: > The wallet type. Possible values include: - `Custodial`: [Custodial Wallets](https://manuals.cobo.com/en/portal/custodial-wallets/introduction) - `MPC`: [MPC Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/introduction) - `SmartContract`: [Smart Contract Wallets](https://manuals.cobo.com/en/portal/smart-contract-wallets/introduction) - `Exchange`: [Exchange Wallets](https://manuals.cobo.com/en/portal/exchange-wallets/introduction) WalletSubtype: type: string enum: - Asset - Web3 - Org-Controlled - User-Controlled - Safe{Wallet} - Main - Sub example: Asset description: > The wallet sub-type. Possible values include: - `Asset`: Custodial Wallets (Asset Wallets). - `Web3`: Custodial Wallets (Web3 Wallets). - `Org-Controlled`: MPC Wallets (Organization-Controlled Wallets). - `User-Controlled`: MPC Wallets (User-Controlled Wallets). - `Safe{Wallet}`: Smart Contract Wallets (Safe). - `Main`: Exchange Wallets (Main Account). - `Sub`: Exchange Wallets (Sub Account). Each wallet sub-type requires a different set of properties. Switch between the above tabs for details. ChainInfo: type: object description: The chain information. required: - chain_id properties: chain_id: type: string description: The chain ID, which is the unique identifier of a blockchain. example: ETH symbol: type: string description: >- The chain symbol for display purposes, which is the abbreviated name of a chain. example: ETH icon_url: type: string description: The URL of the chain icon. example: https://d.cobo.com/public/logos/ETH.png chain_identifier: type: string description: >- A functional identifier used to group blockchains with similar execution logic. For example, `ETH` for all EVM-compatible chains (Ethereum, BNB Smart Chain, Polygon). example: ETH explorer_tx_url: type: string description: >- The transaction URL pattern on the blockchain explorer. You can use it to concatenate the transaction URLs. example: https://etherscan.io/tx/{txn_id} explorer_address_url: type: string description: >- The address URL pattern on the blockchain explorer. You can use it to concatenate the address URLs. example: https://etherscan.io/address/{address} require_memo: type: boolean description: Whether the chain requires a memo. example: false confirming_threshold: type: integer format: int32 description: >- The number of confirmations required for an on-chain transaction, such as 64 for Ethereum. example: 15 coinbase_maturity: type: integer format: int32 description: >- The number of confirmations required before a coinbase transaction is considered mature and can be spent, for example, 100 confirmations for BTC. example: 15 caip2_chain_id: type: string description: >- A standardized, unique identifier for blockchain networks (like eip155:1 for Ethereum) that combines a namespace and a reference to ensure cross-chain compatibility. example: eip155:1 Pagination: type: object description: The pagination information of the returned data. required: - before - after - total_count properties: before: type: string example: RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGmk1 description: > An object ID used to retrieve records before the specified object, indicating earlier or smaller records relative to the current dataset. You can use it to paginate backwards. If empty, it means you have reached the start of the data. Most API endpoints sort by object ID, but some use other fields depending on the endpoint. after: type: string example: RqeEoTkgKG5rpzqYzg2Hd3szmPoj2cE7w5jWwShz3C1vyGSAk description: > An object ID used to retrieve records after the specified object, indicating newer or larger records relative to the current dataset. You can use it to paginate forwards. If empty, it means you have reached the end of the data. Most API endpoints sort by object ID, but some use other fields depending on the endpoint. total_count: type: integer example: 10000 description: >- The total number of records that match the query criteria, unaffected by the pagination parameters (`before` , `after`, and `limit`). 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. ````