Polymarket WebSocket Alerts Guide

Polymarket WebSocket alerts are for monitoring, not for outsourcing judgment. A socket can stream price changes, order book events, sports updates, and user activity faster than a manual refresh. The hard part is deciding what deserves an alert, what gets ignored, and what requires a human review before any action.

This page is educational. It explains data streams, watchlist design, and guardrails. It does not recommend a market, outcome, automation setup, or trade.

Key concepts in plain English

• ▸WebSocket: A live connection that can push updates instead of forcing you to keep refreshing a page.
• ▸Market channel: Polymarket's public stream for order book snapshots, price changes, trade executions, and market lifecycle events.
• ▸User channel: An authenticated stream for personal order and trade updates.
• ▸Sports channel: A public stream for live sports game state, scores, periods, and status updates.
• ▸Alert rule: A written condition that tells you when to review, not a command to trade.

What Polymarket documents actually support

Polymarket documentation lists four WebSocket channels: market, user, sports, and RTDS. The market endpoint is wss://ws-subscriptions-clob.polymarket.com/ws/market and can stream book snapshots, price changes, tick-size changes, last trade prices, best bid/ask updates, new-market events, and market-resolution events. Some market events require custom_feature_enabled: true in the subscription.

The sports WebSocket is public at wss://sports-api.polymarket.com/ws. Polymarket says it can provide live sports scores and game state, with ping messages that require a pong response. That feed should be treated as informational; a serious workflow still checks official market rules, sources, and timing.

A safe alert workflow

1. ▸Start with a watchlist, not a bot. Pick markets you are researching and write why they are on the list.
2. ▸Copy the exact market question, deadline, and resolution source into your notes.
3. ▸Decide which events deserve attention: best bid/ask change, spread widening, liquidity drop, deadline approaching, market resolved, or sports state change.
4. ▸Convert each alert into a review prompt: "check the source," "recalculate implied probability," or "reduce screen time."
5. ▸Keep an audit trail of what fired, what you reviewed, and what you chose not to do.

Example: price alert versus decision alert

A weak alert says: "Yes moved from 42% to 49%."

A stronger alert says:

Market:
Exact question:
Prior Yes midpoint:
New best bid / ask:
Spread before / after:
Visible depth change:
Source update checked? yes/no
Rule deadline changed? yes/no
Action allowed by plan? review only / no action / user-approved action

The second format slows down the click. It forces the difference between a price move and a researched decision.

Common mistakes

• ▸Treating every tick as new information.
• ▸Alerting on displayed price but ignoring spread and depth.
• ▸Mixing sports-score updates with market-resolution rules.
• ▸Letting an alert become an automatic order without written controls.
• ▸Forgetting heartbeat, reconnect, logging, and rate-limit behavior in monitoring tools.

Bucko checklist

• ▸Market question and source saved.
• ▸Alert reason written before the alert is enabled.
• ▸Spread, depth, and timestamp captured.
• ▸Deadline and resolution criteria visible.
• ▸User-defined max-risk cap attached to the market or cluster.
• ▸Post-alert review recorded, including no-action decisions.

How Bucko fits

Use Bucko as the research, journaling, and guardrail workspace around Polymarket alerts: watchlists, source notes, price snapshots, user-defined controls, and post-resolution reviews. Alerts can speed up awareness. Bucko keeps the reasoning visible.

Polymarket CTA

If you are eligible for the US app offer, use code BUCKO for a $50 deposit bonus on the Polymarket US app: https://www.poly.market/BUCKO. Confirm current eligibility, app screens, and offer terms before depositing.

Sources and last-verified notes

• ▸Polymarket docs checked 2026-07-04 PDT: llms.txt/llms-full.txt, WebSocket overview, market channel, user channel, sports WebSocket, rate limits, CLOB market data docs, and public Gamma market samples.
• ▸Public Gamma samples checked 2026-07-04 PDT showed active CPI, soccer, MLB, World Cup, weather, tennis, Senate, IPO, app/AI valuation, and sports-spread markets with varied volume, liquidity, end dates, and source descriptions.
• ▸Bucko/Polymarket partner offer wording is user-provided: code BUCKO, $50 deposit bonus for eligible U.S. app downloads, https://www.poly.market/BUCKO. No newer official affiliate term sheet was independently located during this run.