> ## 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 - Gateway - 2026 > 2026 release notes for Gateway ## July 2026 Added `nonce` support to the Gateway x402 transfer APIs. You can now filter transfers by nonce, and transfer responses include the `nonce` field along with a nullable `txHash` field. ### API updates The following endpoints were updated: * [`GET /v1/x402/transfers`](/api-reference/gateway/all/search-x402transfers) — added optional `nonce` query parameter. * [`GET /v1/x402/transfers/{id}`](/api-reference/gateway/all/get-x402transfer-by-id) — response now includes `nonce` and `txHash`. ## May 2026 Updated the Gateway unified balance Solana quickstart to simplify the script-based flow and add Direct Mint and Forwarding Service branches. ### Documentation updates The following documentation was updated: * [Quickstart: Create and transfer a unified USDC balance on Solana](/gateway/quickstarts/unified-balance-solana) Updated the Gateway unified balance EVM quickstart to simplify the script-based flow and add Forwarding Service coverage. ### Documentation updates The following documentation was updated: * [Quickstart: Create and transfer a unified USDC balance on EVM](/gateway/quickstarts/unified-balance-evm) Added Gateway webhook documentation and subscription management API references. ### Documentation additions The following documentation was created: * [Gateway webhooks](/gateway/webhooks) * [Gateway webhook events](/gateway/references/webhook-events) ### API additions Added the following endpoints to support Gateway webhook subscriptions: * [`POST /v2/notifications/subscriptions/permissionless`](/api-reference/gateway/all/create-permissionless-subscription) * [`GET /v2/notifications/subscriptions/permissionless`](/api-reference/gateway/all/get-permissionless-subscriptions) * [`GET /v2/notifications/subscriptions/permissionless/{id}`](/api-reference/gateway/all/get-permissionless-subscription) * [`PUT /v2/notifications/subscriptions/permissionless/{id}`](/api-reference/gateway/all/update-permissionless-subscription) * [`DELETE /v2/notifications/subscriptions/permissionless/{id}`](/api-reference/gateway/all/delete-permissionless-subscription) * [`POST /v2/notifications/subscriptions/permissionless/{id}/test`](/api-reference/gateway/all/test-permissionless-subscription-connection) * [`POST /v2/notifications/subscriptions/permissionless/{id}/test-notification`](/api-reference/gateway/all/send-permissionless-subscription-test-notification) * [`GET /v2/notifications/signatures/{notificationId}`](/api-reference/gateway/all/get-permissionless-notification-signature) Added a new quickstart for making gasless Gateway deposits with Eco. ### Documentation additions The following documentation was created: * [Quickstart: Gasless Gateway deposits with Eco](/gateway/quickstarts/eco-gasless-deposits) ## April 2026 Updated nanopayments documentation to reflect mainnet launch support. ### Documentation updates The following documentation was updated: * [Supported networks](/gateway/nanopayments/supported-networks) * [Gateway supported blockchains](/gateway/references/supported-blockchains) Expanded the nanopayments documentation with additional buyer, seller, facilitator, and x402 integration guidance. ### Documentation updates The following documentation was updated: * [Quickstart: Pay for resources with nanopayments](/gateway/nanopayments/quickstarts/buyer) * [Quickstart: Accept payments with nanopayments](/gateway/nanopayments/quickstarts/seller) * [How-to: Integrate nanopayments into your existing facilitator](/gateway/nanopayments/howtos/facilitator-integration) * [How-to: Add nanopayments to an x402 buyer](/gateway/nanopayments/howtos/x402-buyer) * [How-to: Add nanopayments to an x402 seller](/gateway/nanopayments/howtos/x402-seller) * [How-to: Use nanopayments with x402](/gateway/nanopayments/howtos/x402-integration) * [How-to: Sign EIP-3009 payment authorizations](/gateway/nanopayments/howtos/eip-3009-signing) Updated Gateway on Solana documentation to support transfers with the Forwarding Service and automatic ATA creation. ### Documentation updates The following documentation was updated: * [How-to: Transfer with the Forwarding Service](/gateway/howtos/forwarding-service) * [Quickstart: Create and transfer a unified USDC balance on Solana](/gateway/quickstarts/unified-balance-solana) * [Gateway fees](/gateway/references/fees) * [Circle Forwarding Service for Gateway](/gateway/references/forwarding-service) * [Technical guide for Gateway on Solana](/gateway/references/solana) ## March 2026 Updated the Gateway unified balance quickstarts to support both Circle Wallets and permissionless implementations on the same page. ### Documentation updates The following documentation was updated: * [Quickstart: Create and transfer a unified USDC balance on EVM](/gateway/quickstarts/unified-balance-evm#circle-wallets) * [Quickstart: Create and transfer a unified USDC balance on Solana](/gateway/quickstarts/unified-balance-solana#circle-wallets) ## February 2026 Added Forwarding Service support for Gateway. The following new topic was created: * [Gateway Forwarding Service](/gateway/references/forwarding-service) Added support for managing delegates for Smart Contract Account (SCA) wallets. ### Documentation additions The following documentation was created: * [How-to: Manage delegates for smart contract wallets](/gateway/howtos/manage-delegates) Updated Gateway quickstart guides and how-tos to use consistent script structure and console output patterns. ### Documentation updates The following documentation were updated: * [Quickstart: Create and Transfer a Unified USDC Balance (EVM)](/gateway/quickstarts/unified-balance-evm) * [Quickstart: Create and Transfer a Unified USDC Balance (Solana)](/gateway/quickstarts/unified-balance-solana) * [How-to: Create a unified USDC balance](/gateway/howtos/create-unified-usdc-balance) * [How-to: Transfer a unified USDC balance instantly](/gateway/howtos/transfer-unified-usdc-balance) ## January 2026 ### API additions Added the following endpoints to support Circle Gateway: * [`POST /v1/deposits`](/api-reference/gateway/all/get-deposits) Added support for Gateway on Solana. The following new topics were created: * [Gateway technical guide](/gateway/references/solana) * [Gateway Solana Programs and Interfaces](/gateway/references/solana-programs) * [Gateway Solana Quickstart](/gateway/quickstarts/unified-balance-solana)