We will be performing scheduled maintenance on Tuesday, September 8, from 6:00 – 7:00 PM ET (22:00 – 23:00 UTC). Trading may be temporarily unavailable during this time.

This release adds a 50ms grace window so a cancel-by-client-order-id that races its own create now succeeds instead of returning order_unknown, and serves exact lookups for rejected orders from gateway memory so they no longer shed with 503 under load. Two read endpoints now reject malformed filters instead of silently ignoring them. Market-maker websocket connections will drop once as the gateway rolls.

Full changelog: https://docs.polymarket.com/changelog/perps#sep-8-2026

Scheduled maintenance has started. Expect up to 1h of downtime.

The maintenance has been completed. All exchange operations are back to normal.

We are experiencing an unexpected downtime. Trading might not be available at the moment.

All exchange operations are back to normal. Apologies for the inconvenience.

We will be launching Crypto listings on [09/10] at 4 pm UTC.

PONS
CASHCAT
USELESS
KAITO
ARB
LDO
AVAX
LTC
XPL
XMR
LINK
VIRTUAL
JUP
ETHFI
PENDLE
MORPHO

Rewards will start counting for these assets at launch.

16 new perps go live today at 16:00 UTC. We are running a one time bonus on top of daily liquidity rewards for the first 24 hours.

$1,000 per listing, $16,000 total. Same scoring you already quote against for the daily liquidity rewards.

Three things to know:

- Bonus is distributed per asset to the top 3 market makers. Ranking is on displayed liquidity, not volume. Same score as the daily program: band weighted two sided depth, harmonic mean across sides, uptime across snapshots. Top 3 per listing take 60 / 25 / 15. Fourth and below earn nothing from the bonus.
- 16:00 to 22:00 UTC counts 5x. That block settles 62.5% of each pot.
- Trailing 7 day maker share is not weighted for the window.

Daily rewards and the OI incentive run as normal underneath and are unaffected by where you place.

PONS, CASHCAT, USELESS, KAITO, ARB, LDO, AVAX, LTC, XPL, XMR, LINK, VIRTUAL, JUP, ETHFI, PENDLE, MORPHO

These instruments are live now in the API.
PONS
CASHCAT
USELESS
KAITO
ARB
LDO
AVAX
LTC
XPL
XMR
LINK
VIRTUAL
JUP
ETHFI
PENDLE
MORPHO
Rewards will start counting for these assets at 4pm UTC

We will be performing scheduled maintenance today, on Monday, September 14, from 8:00 – 9:00 AM UTC. Trading may be temporarily unavailable during this time.

No breaking changes to order placement, cancellation, authentication, or market data.

Full changelog: https://docs.polymarket.com/changelog/perps#sep-14-2026

Maintenance extended ~30min. Will update here when completed.

Maintenance is complete and trading is fully operational. We apologize again for the extended maintenance window.

We will be launching RWA listings on [09/16] at 4 pm UTC.

CBRS
MRVL
EWY
NCLD
SOXL
UNITREE

Rewards will start counting for these assets at launch.

NEW LISTING BONUS APPLIES FOR ALL NEW PERPS!

These instruments are live now in the API.

CBRS
MRVL
EWY
NCLD
SOXL
UNITREE

Rewards will start counting for these assets at 4pm UTC

We will be performing scheduled maintenance on Thursday, September 17, from 08:00 – 09:00 UTC. Trading may be temporarily unavailable during this time.

No breaking changes to order placement, authentication, or market data

This release makes a cancel that races its own order's acceptance succeed instead of returning `order_in_flight`, and switches cancel and account routes to a retryable `503 service_unavailable` (instead of `500`) when the engine times out. A more aggressive reduce-only order now displaces your own less aggressive resting reduce-only orders on the same side (`reduce_only_expired`), and isolated-margin accounts get a stricter margin check when a ladder of orders could flip a position. The market-maker REST host's connection ceilings are doubled, and `fee_tier` is added as a required field on the portfolio response. Account groups (cross-account self-trade prevention, trading-key transfers, shared leverage defaults) are available on request. Market-maker websocket connections will drop once as the gateway rolls.

Full changelog: https://docs.polymarket.com/changelog/perps#sep-17-2026

Maintenance is complete and trading is fully operational. We apologize again for the extended maintenance window.

50x leverage is now live for USA500, NAS100, BTC and ETH

We will be performing scheduled maintenance on Tuesday, September 22, from 08:00 – 09:00 UTC. Trading may be temporarily unavailable during this time.

This release margins position-reversing orders at their worst executable price, so some flips previously admitted may now return insufficient_margin. Candle and volume strings on public reads are now correctly rounded (numeric values unchanged), and daily reward rows appear automatically after 12:05 UTC. Market-maker websocket connections will drop once as the gateway rolls.

Full changelog: https://docs.polymarket.com/changelog/perps#sep-22-2026

The maintenance has been completed. All exchange operations are back to normal.

We will be performing scheduled maintenance on Sunday, September 27, from 9:00 – 10:00 AM ET (13:00 – 14:00 UTC). Trading may be temporarily unavailable during this time.

This release adds three required fields to every fill (builder_fee, total_fee, settlement) - strict decoders must accept them before the deploy - and GET /v1/account/rewards now returns 400 for start_timestamp/end_timestamp. Please also accept two new order statuses (instrument_close_only, instrument_settled) and new instrument fields (close_only, settlement, display_symbol) that support instrument delisting; SBE consumers must accept schema 49. TWAP cancel/pause/list routes and position snapshots are new; TWAP entry, chase orders, GTD, partial TP/SL and builder attribution ship switched off. Market-maker websocket connections will drop once as the gateway rolls.

Full changelog: https://docs.polymarket.com/changelog/perps#sep-27-2026

Asset Delisting: Kioxia is being delisted

Close active positions by 12:00am UTC, Monday, Sept 28. Remaining positions will be automatically closed and settled.