add links to the sdk docs

docs/100-getting-started/020-onboarding.md

@@ -73,3 +73,4 @@ On the [Testnet instance of the Polymesh Portal](https://portal.polymesh.live/),
 
 - [Polymesh Portal Mainnet](https://portal.polymesh.network)
 - [Polymesh Portal Testnet](https://portal.polymesh.live)
+- [Polymesh Identity SDK Documentation](/sdk-docs/api/client/Identities/classes/Identities/)

docs/200-core-concepts/020-polyx/staking.mdx

@@ -104,3 +104,4 @@ Depending on the type of key selected (Controller or Stash), you may not have ac
 
 - [Staking Guide](https://community.polymesh.live/hc/en-us/articles/12131464556060-How-to-stake-on-the-Polymesh-Portal)
 - [Polymesh Portal](https://portal.polymesh.network/)
+- [Staking SDK Documentation](/sdk-docs/api/client/Staking/classes/Staking/)

docs/200-core-concepts/030-identity/020-primary-keys.md

@@ -175,3 +175,7 @@ Use [secondary keys](/identity/advanced/secondary-keys) for:
 - Cannot be replaced without proper rotation
 - Must maintain sufficient POLYX for transaction fees
 - Cannot act as a secondary key for another identity
+
+#### With the SDK
+
+- The [AccountManagement](/sdk-docs/api/client/AccountManagement/classes/AccountManagement/) class handles functionality related to account management, like creating or freezing accounts.

docs/200-core-concepts/030-identity/040-advanced/010-secondary-keys.md

@@ -253,3 +253,7 @@ Choose based on your needs:
 ## Conclusion
 
 Secondary keys provide a powerful way to implement secure and flexible identity management on Polymesh. When properly implemented with appropriate permissions and controls, they enable organizations to maintain strong security while supporting efficient operations. Understanding the relationship between secondary keys, smart contracts, and child identities allows for creating sophisticated and secure organizational structures on the blockchain.
+
+### With the SDK
+
+- The [AccountManagement](/sdk-docs/api/client/AccountManagement/classes/AccountManagement/) class handles functionality related to the management of secondary keys, including adding or removing keys, and primary key rotation.

docs/200-core-concepts/030-identity/040-advanced/020-multisig/index.md

@@ -204,3 +204,8 @@ Invalidated proposals must be recreated as new proposals if required.
 :::note
 Historical proposal details can be retrieved via the [SubQuery](/development/tooling/subquery) chain indexing service or by querying historical blocks on an archive node.
 :::
+
+#### With the SDK
+
+- The [MultiSig](/sdk-docs/api/entities/Account/MultiSig/classes/MultiSig/) class represents a multisig account and all associated information.
+- The [MultiSigProposal](/sdk-docs/api/entities/MultiSigProposal/classes/MultiSigProposal/) class represents the proposal and handles all functionality related to multisig proposals.

docs/200-core-concepts/040-assets/110-sto.md

@@ -279,3 +279,6 @@ The receipt amount must be **exactly** the investment cost calculated by the STO
 :::note
 The payload data must be wrapped with `<Bytes>` and `</Bytes>` tags before signing. The Polymesh SDK provides helper functions to generate valid STO receipts with the correct format.
 :::
+
+### With the SDK
+Use the [Offering Class](https://developers.polymesh.network/sdk-docs/classes/API/Entities/Offering/) to implement basic STO functionality.