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

# Release notes - Bridge Kit - 2026

> 2026 release notes for Circle's Bridge Kit SDK

<Check>
  **Bridge Kit has [moved to Arc](https://docs.arc.io/app-kit/bridge).**
</Check>

## March 2026

<Update label="2026.03.17">
  Bridge Kit is now part of [Arc App Kit](https://docs.arc.io/app-kit/).

  ### Documentation updates

  Migrated Bridge Kit documentation to the Arc developer docs:

  * [App Kit: Bridge](https://docs.arc.io/app-kit/bridge)
</Update>

<Update label="2026.03.10">
  Bridge Kit now supports Morph mainnet and Morph Hoodi Testnet (CCTP).

  ### Documentation updates

  Updated the following documentation to reflect support for Morph:

  * [Supported Blockchains](https://docs.arc.io/app-kit/references/supported-blockchains)
</Update>

<Update label="2026.03.09">
  Bridge Kit now supports EDGE mainnet and EDGE Testnet (CCTP).

  ### Documentation updates

  Updated the following documentation to reflect support for EDGE:

  * [Supported Blockchains](https://docs.arc.io/app-kit/references/supported-blockchains)
</Update>

## February 2026

<Update label="2026.02.27">
  Bridge Kit now supports the Circle Forwarding Service.

  ### Documentation additions

  Added the following documentation to reflect support for the Forwarding Service:

  * [Use the Forwarding Service](https://docs.arc.io/app-kit/tutorials/bridge/use-forwarding-service)

  ### Documentation updates

  Updated the following documentation to include the Forwarding Service fee:

  * [Custom Fees](https://docs.arc.io/app-kit/concepts/bridge-fees)
</Update>

## January 2026

<Update label="2026.01.28">
  Bridge Kit now supports Monad.

  ### Documentation updates

  Updated the following documentation to reflect support for Monad mainnet and
  testnet:

  * [Supported Blockchains](https://docs.arc.io/app-kit/references/supported-blockchains)
</Update>

<Update label="2026.01.14">
  The `estimate()` function now returns `token`, `amount`, `source`, and
  `destination` fields alongside cost estimates. Exported error type guards (such
  as `isKitError`, `isBalanceError`, `isOnchainError`), error constants (such as
  `BalanceError`, `OnchainError`), and helper functions (`getErrorCode`,
  `getErrorMessage`) for improved error detection and recovery.

  ### Documentation updates

  Updated the following documentation to reflect new method names and features:

  * [Bridge Kit Installation](https://docs.arc.io/app-kit/tutorials/installation)
  * [Quickstart: Bridge USDC Between EVM Chains](https://docs.arc.io/app-kit/quickstarts/bridge-between-evm-chains)
  * [Quickstart: Bridge USDC between Solana and EVM](https://docs.arc.io/app-kit/quickstarts/bridge-between-solana-and-evm)
  * [Adapter Setups](https://docs.arc.io/app-kit/tutorials/adapter-setups)
  * [Collect a Transfer Fee](https://docs.arc.io/app-kit/tutorials/bridge/collect-bridge-fee)
  * [Estimate Costs Before Transferring](https://docs.arc.io/app-kit/tutorials/bridge/estimate-costs)
  * [Configure Transfer Speed and Maximum Cost](https://docs.arc.io/app-kit/tutorials/bridge/configure-transfer-speed)
  * [Specify Recipient Address](https://docs.arc.io/app-kit/tutorials/bridge/specify-recipient-address)
  * [Error Recovery and Troubleshooting](https://docs.arc.io/app-kit/references/bridge-error-recovery)
  * [Bridge Kit SDK Reference](https://docs.arc.io/app-kit/references/sdk-reference)
</Update>