Dear OKX User, We want to give you advance notice of a scheduled system maintenance window that will affect certain platform features.

Port is already in use: another program may be using port 3000. Close other running terminals or kill the process. Developer tools pop-up (Mac): close any pop-ups asking to install developer tools. These are not required. Software installation pop-up (Windows): close any pop-ups prompting you to install additional software.

token Head over to Overview Select Token unlocks Token unlocks menu in the Overview of the crypto page, on the app pageWhy is the token unlocks schedule important?

If an order fails, we'll send you an email to let you know and we'll continue to execute future orders on schedule.

Example 2 - Scheduled Parameter settings Crypto allocation: BTC | 50%; ETH | 30%; SOL | 20% Rebalance mode: Scheduled | 4 hours Investment amount: 10,000 USDT Running bot Phase 1 - Exchanged into target crypto. The invested amount was traded into 5 BTC worth 5,000 USDT (assume the price of BTC is ₮1,000), 6 ETH worth 3,000 USDT (assume the price of ETH is ₮500), 20 SOL worth 2,000 USDT (assume the price of SOL is ₮100). Phase 2 - Trigger rebalancing.

To further enhance trading performance and user experience, OKX is scheduled to perform the server migration at the end of July 2026. The migration will be zero-downtime. API endpoints and fields will not be affected by the migration. All latency-sensitive services will be migrated from Hong Kong to Tokyo. Changelog: June 12, 2026 — Migration rescheduled from end of June to end of July. Regards, Team OKX

To further enhance trading performance and user experience, OKX INC. is scheduled to perform the server migration at the end of July 2026. The migration will be zero-downtime. API endpoints and fields will not be affected by the migration. All latency-sensitive services will be migrated from Hong Kong to Tokyo. Change Log: June 12, 2026 — Migration rescheduled from end of June to end of July. Regards, Team OKX

Trading Hours & Scheduled Non-Trading Days Gold's underlying TradFi market follows fixed trading sessions and holiday closures. OKX references the XCEC Holiday Calendar to identify scheduled non-trading days for the TradFi component of the XAU index. Known XCEC (including U.S. listed holidays) are non-trading days. Where the scheduled expiry date of an XAU event contract falls on a non-trading day, OKX will not list such contract; such events are pre-emptively excluded at the listing layer.4.

Note: If you have previously scheduled a video call session, you may follow the steps below to join. Go to the Support center Select Join video call appointment under Self-service tools Select join video call appointment Enter the authentication code to join the video call Enter the authenticator code to join the video call Note: the email OTP will be sent to the verified contact email you used during your chat or ticket with customer service.

The new fee schedule will apply automatically starting May 19.Questions? For questions, contact your Relationship Manager or VIP support. Thank you for your continued support. OKX US Team

Affected tokens: UXLINK Affected trading pairs execution schedule: We will delist the following USDⓈ and USDT spot trading pairs according to the schedule below: Spot trading pairs Delisting time UXLINK/USDⓈ (UXLINK/USD) April 3, 2026, 08:00 - 10:00 UTC UXLINK/USDT April 6, 2026, 08:00 - 10:00 UTCAdditional details We advise users to cancel any open orders pertaining to the affected trading pairs before the delisting. Otherwise, the system will automatically cancel these orders.

Please take note of the following schedule: Spot GRAM/USDT pre-open will take place from 9:00 to 10:00 UTC on June 17, 2026. GRAM/USDT spot trading will open at 10:00 UTC on June 17, 2026. Margin GRAM/USDT margin trading enabled at 11:00 UTC on June 17, 2026 Perpetual Futures GRAM/USDT perpetual futures trading will open at 10:30 UTC on June 17, 2026 For any inquiries, please feel free to contact us via the support center or connect with us on any platform of your choice. OKX June 17, 2026

To enhance feed efficiency and stability, OKX is scheduled to deprecate the checksum field across WebSocket order book channels. The deprecation will take effect on the demo environment on 2 June 2026 and on the production environment on 23 June 2026. The change applies to the books, books-l2-tbt, and books50-l2-tbt channels . After the deprecation date, the checksum field will remain present in push messages but will always return 0 and must no longer be used for data integrity validation.

Affected tokens: MAJOR and J Affected trading pairs execution schedule: We will delist the following USDⓈ and USDT spot trading pairs according to the schedule below: Spot trading pairs Delisting time MAJOR/USDⓈ (MAJOR/USD) June 2, 2026, 08:00 - 10:00 UTC MAJOR/USDT June 5, 2026, 08:00 - 10:00 UTC J/USDT June 5, 2026, 08:00 - 10:00 UTCAdditional details We advise users to cancel any open orders pertaining to the affected trading pairs before the delisting.

Affected tokens: ICE Affected trading pairs: ICE/USDT, ICE/USDⓈ (ICE/USD) Execution schedule: We will delist the following USDⓈ and USDT spot trading pairs according to the schedule below: Spot trading pairs Delisting time ICE/USDⓈ (ICE/USD) December 14, 2025, 08:00 - 10:00 UTC ICE/USDT December 16, 2025, 08:00 - 10:00 UTC Additional details We advise users to cancel any open orders pertaining to the affected trading pairs before the delisting.