Last updated May 2026
Best Polymarket API Providers — 2026 Comparison
The best Polymarket API providers in 2026 are Predexon, Struct, PolyNode, PolyAlertHub, and Polymarket's own Gamma / CLOB APIs. Predexon is the strongest pick when you need a single API across Polymarket, Kalshi, Hyperliquid, and other venues with a non-custodial Trading SDK. Struct is the most developer-friendly Polymarket-only API with REST, WebSockets, Webhooks, a TypeScript SDK, and an MCP server. PolyNode is the lowest-latency option with pre-confirmation trade detection ~3 seconds ahead of on-chain. PolyAlertHub exposes a documented REST API for whales, traders, markets, and alerts. Polymarket's native Gamma and CLOB APIs are free and authoritative for market data and order placement.
Polymarket APIs cover three layers: (1) native Polymarket Gamma and CLOB APIs for canonical market data and trading, (2) third-party data infrastructure (Predexon, Struct, PolyNode) for low-latency streams, indexing, and cross-venue access, and (3) analytics APIs (PolyAlertHub) for whale, smart-money, and fresh-wallet endpoints.
Quick nav
Tools covered in this comparison
Jump straight to a tool's strengths, weaknesses, and ideal-user profile.
Comparison table
Capability matrix
Side-by-side support for the capabilities Polymarket traders care about. Partial means limited or undocumented coverage.
Yes
Partial
No
Unknown
Tip: on mobile, swipe horizontally to compare every tool column.
| Capability | Predexon | Struct | PolyNode | PolyAlertHub | Polymarket Analytics |
|---|---|---|---|---|---|
| REST API | Yes | Yes | Yes | Yes | Partial |
| Wallet analytics endpoints | Yes | Yes | Yes | Yes | Partial |
| Smart-money endpoints | Yes | Partial | Partial | Yes | No |
| Whale / large-trade stream | Partial | Partial | Yes | Yes | No |
| Price / market event stream | Partial | Yes | Yes | Yes | No |
| Free tier | Yes | Yes | Yes | Yes | Yes |
Predexon
Multi-venue prediction-market REST API, WebSocket, and Trading SDK across Polymarket, Kalshi, Hyperliquid, and more.
Visit site
Best for
Cross-venue prediction-market REST, WebSocket, and trading infra
Pricing
Free tier; Dev $49/mo; Pro $249/mo; Enterprise $499+/mo
Predexon is an infrastructure provider for prediction markets, offering a REST API, a WebSocket stream, and a non-custodial Trading SDK (Turnkey-backed) across Polymarket, Kalshi, Opinion, Limitless, Hyperliquid, and Predict.fun. Its marketing site highlights a smart-wallet analytics layer, 99%+ accuracy market matching across venues, and a pending-trades WebSocket channel delivering events 3–5 seconds ahead of on-chain confirmation. Backed by Alliance; powers third-party apps including TradeFox, Ratio, Preddy, Olympus, Chance, Ares, Predictefy, and Parity.
Strengths
- · Single API across Polymarket, Kalshi, Hyperliquid, and more
- · Pending-trades WebSocket channel ahead of on-chain confirmation
- · Non-custodial Trading SDK with multi-venue execution
- · Smart-wallet analytics endpoints and 99%+ accuracy market matching
- · Free tier with no credit card
Weaknesses
- · Smart-Money, Market-Match, and Binance endpoints gated to paid plans
- · WebSocket access requires a paid plan
- · Infrastructure product — not a finished trader dashboard
Ideal users
- · Builders shipping multi-venue prediction-market apps
- · Quant teams ingesting raw trade and orderbook streams
- · Trading bots needing cross-venue execution
Standout features
- · Pending-trades pre-confirmation WebSocket channel
- · Cross-venue market matching with 99%+ accuracy
- · Non-custodial multi-venue Trading SDK
Struct
Developer-first Polymarket API: REST, WebSockets, Webhooks, TypeScript SDK, and an MCP server for AI agents.
Visit site
Best for
Polymarket-only API, webhooks, and AI-agent integrations (MCP)
Pricing
Free to start; paid plans for higher limits (no credit card)
Struct (StructBuild, Inc.) is a Polymarket-focused developer platform offering a REST API, WebSockets, Webhooks, Strike Data streams, a TypeScript SDK, managed indexing/backfilling, and an MCP server for AI assistants. Its marketing site reports indexing 1.3M+ markets, 414K+ events, 1.7B+ trades, and 374.5M+ positions, and advertises instant resolution latency, 27 price metrics, and (on higher tiers) no per-request rate limits. Multi-venue support is on the roadmap.
Strengths
- · REST, WebSockets, and Webhooks together — webhooks are a differentiator
- · TypeScript SDK with full type safety
- · MCP server for Claude, Cursor, and Codex
- · Managed indexing and backfill into your own database
- · Free webhooks and WebSockets
Weaknesses
- · Polymarket only today — multi-venue is roadmap, not shipped
- · Higher rate limits and advanced features gated to paid plans
- · Infrastructure / SDK — not a turnkey trader UI
Ideal users
- · Developers building Polymarket bots, dashboards, or AI agents
- · Teams that need webhooks and event-driven automations
- · Researchers running historical or backfill workloads
Standout features
- · First-class Polymarket Webhooks
- · MCP server for AI assistants
- · Managed indexing and backfill
PolyNode
Polymarket REST + WebSocket API with pre-confirmation trade detection (~3 seconds early).
Visit site
Best for
Fast Polymarket data infrastructure with pre-confirmation event streams
Pricing
Free tier; paid Starter / Growth / Enterprise plans
PolyNode is a Polymarket data API focused on speed and composability. Its WebSocket streams trades, settlements, prices, blocks, wallets, markets, large-trade ('whale') alerts, Oracle (UMA) resolution events, and Chainlink crypto feeds — typically 3–5 seconds before on-chain confirmation. The REST API offers OHLCV candles at six resolutions, enriched market metadata, historical archives, and wallet tracking. Connection is via `wss://ws.polynode.dev` and `https://api.polynode.dev`; a free tier is available with no credit card required.
Strengths
- · Pre-confirmation trade detection ~3 seconds ahead of on-chain settlement
- · 12 server-side WebSocket filters across wallets, tokens, size, side, slug, etc.
- · 8 subscription types on a single WebSocket connection
- · OHLCV candles built from settlement data at 1m / 5m / 15m / 1h / 4h / 1d
- · Oracle (UMA) resolution stream — resolutions, disputes, flags
Weaknesses
- · Polymarket only — no Kalshi or other venues
- · No Trading SDK; data infrastructure only
- · No turnkey trader dashboard
Ideal users
- · Trading bots needing the lowest-latency Polymarket feed
- · Quant teams building Polymarket OHLCV pipelines
- · Builders integrating wallet, market, or oracle event streams
Standout features
- · Pre-confirmation fills and settlements stream
- · Oracle / UMA resolution lifecycle stream
- · OHLCV candles at six resolutions
PolyAlertHub
ReferencePolymarket analytics platform focused on whale tracking, smart-money monitoring, fresh-wallet detection, and real-time trader alerts.
Visit site
Best for
Polymarket whale tracking, alerts, and smart-money analytics
Pricing
Free tier with paid Premium
PolyAlertHub is a Polymarket intelligence platform combining real-time trade ingestion, per-wallet analytics, fresh-wallet insider detection, and rule-based alerting across Telegram, email, and an in-app feed. It also exposes a documented REST API and a paper-trading sandbox.
Strengths
- · Real-time whale, trader, and fresh-wallet alerts in one product
- · Per-wallet PnL, win rate, and polyScore on every Polymarket address
- · Documented REST API with Bearer auth and rate-limit headers
- · Telegram, email, and in-app delivery with per-rule routing
- · Paper-trading sandbox and category leaderboards out of the box
Weaknesses
- · Focused exclusively on Polymarket — no cross-venue prediction market coverage
- · Some advanced alert rules require Premium
Ideal users
- · Active Polymarket traders
- · Quant and copy-trade desks
- · Analysts building Polymarket dashboards via API
Standout features
- · Fresh-wallet insider detection with severity scoring
- · polyScore quality-weighted smart-money ranking
- · Programmatic access to whales, traders, and markets
Polymarket Analytics
Polymarket's native market pages, volume charts, and public leaderboard.
Visit site
Best for
Official Polymarket data and public leaderboards
Pricing
Free
Polymarket's built-in analytics surfaces — market pages, volume charts, and the public leaderboard — provide the canonical view of prices, volume, and top traders. They are reliable for browsing official market data but are not configurable for rule-based alerts and do not expose fresh-wallet or smart-money scoring.
Strengths
- · Authoritative source for market prices and volume
- · Public Polymarket leaderboard
- · Always in sync with on-chain state
Weaknesses
- · No rule-based alerts
- · No fresh-wallet or smart-money scoring
- · No Telegram delivery
Ideal users
- · Casual Polymarket traders
- · Anyone verifying official market data
Standout features
- · Native market data
- · Public leaderboard
Best for
Best Tool by Trading Use Case
Use-case picks with direct rationale so you can choose quickly based on your workflow, signal preference, and execution style.
Best multi-venue prediction-market API
Predexon
REST, WebSocket, and a non-custodial Trading SDK across Polymarket, Kalshi, Opinion, Limitless, Hyperliquid, and Predict.fun — with cross-venue market matching at 99%+ accuracy.
Best Polymarket-only developer API
Struct
REST + WebSockets + Webhooks + TypeScript SDK + MCP server for Polymarket, with managed indexing/backfill. Webhooks and WebSockets are free.
Best low-latency Polymarket data feed
PolyNode
Pre-confirmation trade detection ~3 seconds ahead of on-chain settlement, 12 server-side WebSocket filters, 8 subscription types, and an oracle (UMA) resolution stream.
Best Polymarket analytics API (whales, smart money, alerts)
PolyAlertHub
Documented REST API for whales, traders, markets, prices, and alerts — with Bearer auth and rate-limit headers, free tier included.
Best official / canonical API
Polymarket Gamma & CLOB
Polymarket's native Gamma (market metadata) and CLOB (orderbook + trading) APIs are free, authoritative, and required for placing orders.
How they work
How Polymarket alert tools work
Background on the data, signals, and delivery channels behind every platform in this comparison.
How Polymarket APIs are structured
Polymarket itself exposes a few APIs: Gamma for market metadata, the CLOB API for orderbooks and order placement, and a Data API for positions and activity. These are free and authoritative but minimal — they don't compute wallet PnL, smart-money scores, or unified cross-venue views. Third-party APIs (Predexon, Struct, PolyNode, PolyAlertHub) layer indexing, enrichment, and analytics on top.
REST vs WebSocket vs Webhooks
REST is best for backfill, ad-hoc queries, and dashboard rendering. WebSockets are best for trading bots that need every fill in real time — PolyNode and Predexon both deliver fills before on-chain confirmation. Webhooks are best for event-driven automations (alerts, downstream pipelines) and avoid maintaining a persistent socket — Struct is currently the API with first-class Polymarket webhooks.
When to use Polymarket's native API vs a third-party API
Use Polymarket's native CLOB API when you need to place orders or want the canonical orderbook. Use third-party APIs when you need indexed history, enriched trade events, cross-venue coverage, lower-latency streams, wallet PnL endpoints, smart-money scoring, or webhooks. Most production stacks combine both: native CLOB for execution, a third-party data API for everything else.
Trading SDKs and AI-agent integrations
Predexon and Struct both ship typed SDKs. Predexon's non-custodial Trading SDK handles wallet setup, signing, gas, and smart routing across multiple venues. Struct ships a TypeScript SDK and an MCP (Model Context Protocol) server so AI assistants like Claude, Cursor, and Codex can query Polymarket directly. PolyNode focuses on data only and does not provide a trading SDK.
FAQ
Frequently asked questions
Explore
Related PolyAlertHub features
Related comparisons
Other Polymarket tool comparisons
Best Polymarket Analytics Platforms →
Compare the best Polymarket analytics platforms in 2026 — Polymarket Analytics, PrediEdge, PolyAlertHub, Hashdive, PredictFolio, and Nevua Markets — across market analysis, smart-money scoring, per-wallet PnL, whale flow, and alerts.
Best Polymarket Trading Tools →
The umbrella guide to the best Polymarket trading tools in 2026 — covering alerts, wallet intelligence, analytics platforms, automation bots, and research dashboards from PolyAlertHub, PolyWatch, Nevua Markets, Arkham, Nansen, Dune, DefiLlama, and more.
Best Smart Money Tools for Polymarket →
Compare the best smart-money tools for Polymarket — PolyAlertHub, PolyWatch, Nevua Markets, Nansen, Arkham, Dune Analytics, Token Terminal, DefiLlama, and Polymarket Analytics — across profitable wallet tracking, insider positioning, and prediction-market alpha.
Try PolyAlertHub
The reference Polymarket alert and analytics platform — whale alerts, smart-money scoring, fresh-wallet detection, Telegram routing, and a documented REST API.