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NOTE: THIS DOCS IS CURRENTLY BEING TESTED ON SEPOLINA TEST NETWORK WHEN LAUCHED THE NETWORK WILL BE SET TO BASE MAINNET. The Central Limit Order Book (CLOB) is a high-performance order matching engine for prediction markets on pumpEVM.fun. Built on Jump Protocol, it provides institutional-grade order execution with sub-millisecond latency and high throughput. The CLOB is available exclusively on pred.pumpevm.fun and powers advanced trading features including limit orders, market orders, stop-loss, take-profit, and real-time order book management.

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Architecture

┌─────────────────────────────────────────────────────────────────────┐
│                    CLOB Client — Prediction Markets                 │
├─────────────────────────────────────────────────────────────────────┤
│                         Jump Protocol                               │
│             High-performance order matching engine                  │
│        Sub-millisecond latency · 10,000+ orders/sec                 │
├─────────────────────────────────────────────────────────────────────┤
│                       Order Book Engine                             │
│     Limit · Market · Stop orders                                    │
│     Matching · Execution · Position management                      │
├─────────────────────────────────────────────────────────────────────┤
│                        WebSocket API                                │
│     Order book · Trades · Positions · Account                       │
└─────────────────────────────────────────────────────────────────────┘

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Key features

FeatureDescription
Jump Protocol integrationUltra-fast order matching engine.
Sub-millisecond latencyOrders matched in < 300 ms.
10,000+ orders/secHigh-throughput capacity.
MEV-resistantPrevents front-running.
Cross-chain supportOrder routing across multiple EVM networks.
Competitive fees0.02% maker / 0.05% taker.
Real-time updatesWebSocket streaming for book, trades, positions.
Advanced order typesLimit, market, stop-loss, take-profit.

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CLOB vs AMM

FeatureCLOB (Jump Protocol)AMM (Uniswap)
Order typesLimit, market, stop-lossSwap only
Price discoveryOrder bookPool formula
SlippageLow (visible in book)Variable
LiquidityMarket-maker providedLP provided
LatencySub-millisecond5–15 seconds
ControlFull order controlLimited
Fees0.02% / 0.05%1%
MEV resistanceHighLow to medium

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Explore the API

Order types

Limit, market, stop-loss, and take-profit payloads.

WebSocket API

Channels, subscriptions, and streaming messages.

Order management

Place, cancel, and query orders.

Market data

Order books, depth, summaries, and listings.

REST endpoints

Coming Q4 2026.

Integration guide

JavaScript and TypeScript examples.

Errors & rate limits

Codes, responses, and throttling rules.