Polygon RPC for Polymarket Bots: Alchemy, QuickNode, Ankr
Polygon RPC provider comparison for Polymarket bots in 2026: Alchemy, QuickNode, Ankr, public endpoints, self-hosted. Latency, rate limits, free-tier usable for paper trading.
Polygon RPC provider comparison for Polymarket bots in 2026: Alchemy, QuickNode, Ankr, public endpoints, self-hosted. Latency, rate limits, free-tier usable for paper trading.
By Harley Young, lead writer at Polymarkets.co.il. Last reviewed: May 2026.
What this chapter covers
This is chapter 5 of our 32-part series on building a Polymarket trading bot. We cover the topic in depth across the sections below. Body content for each section is being written and rolled out chapter-by-chapter; FAQ answers and references are already complete and reflect production experience from running our own trader.
What an RPC does for your bot
Alchemy: free tier and pricing
QuickNode: dedicated nodes
Ankr: cheapest paid tier
Public Polygon RPCs (free, rate-limited]
Self-hosted Polygon node (when it makes sense)
Latency benchmarks (US-East vs EU)
Failover patterns
What an RPC does for your bot
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Alchemy: free tier and pricing
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
QuickNode: dedicated nodes
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Ankr: cheapest paid tier
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Public Polygon RPCs (free, rate-limited]
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Self-hosted Polygon node (when it makes sense)
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Latency benchmarks (US-East vs EU)
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Failover patterns
This section is in active development. Want to be notified when it goes live? Contact us or watch the authors page.
Frequently asked questions
Do I need a paid Polygon RPC for my Polymarket bot?
Not for paper trading or low-volume bots. The public Polygon RPCs (polygon-rpc.com) work fine if you make under ~1 request/sec on average. Once you scale to multiple markets or need WebSocket subscriptions, move to Alchemy, QuickNode, or Ankr - free tiers cover most retail bots.
Does Polymarket need a Polygon RPC if I use the SDK?
The CLOB SDK calls Polymarket REST/WebSocket APIs - those do NOT need a Polygon RPC. You only need a Polygon RPC for on-chain reads (USDC/pUSD balance, contract events, UMA oracle reads, custom EIP-712 signature flows). Many bots never need to talk to Polygon directly.
What is the cheapest reliable Polygon RPC?
As of 2026, Ankr Premium starts around $10/mo with no per-request fees up to a generous quota. Alchemys free tier is also enough for most retail bots (300M compute units/mo). QuickNode is more expensive but has dedicated-node options if you need predictable performance.
Can I host my own Polygon node?
Yes, but it is overkill unless you are running a high-frequency bot or doing heavy on-chain analytics. A Polygon full node needs ~1 TB SSD and weeks of sync time. The cost in disk + maintenance usually exceeds a paid RPC plan for any retail-scale bot.
What WebSocket should I subscribe to?
For Polymarket order book data, subscribe to Polymarkets own WebSocket at wss://ws-subscriptions-clob.polymarket.com/ws/market. For Polygon block events (rare for most bots), subscribe to your RPC providers WS endpoint (e.g., wss://polygon-mainnet.g.alchemy.com/v2/YOUR_KEY).
How do I avoid hitting rate limits?
Cache aggressively (order book snapshots, gamma metadata), use WebSocket for real-time data instead of polling, batch read calls when possible, and add a backoff on 429 responses. Most rate-limit hits we see are from poorly-coded loops, not real demand.
Cau hoi thuong gap
Do I need a paid Polygon RPC for my Polymarket bot?
Not for paper trading or low-volume bots. The public Polygon RPCs (polygon-rpc.com) work fine if you make under ~1 request/sec on average. Once you scale to multiple markets or need WebSocket subscriptions, move to Alchemy, QuickNode, or Ankr - free tiers cover most retail bots.
Does Polymarket need a Polygon RPC if I use the SDK?
The CLOB SDK calls Polymarket REST/WebSocket APIs - those do NOT need a Polygon RPC. You only need a Polygon RPC for on-chain reads (USDC/pUSD balance, contract events, UMA oracle reads, custom EIP-712 signature flows). Many bots never need to talk to Polygon directly.
What is the cheapest reliable Polygon RPC?
As of 2026, Ankr Premium starts around $10/mo with no per-request fees up to a generous quota. Alchemys free tier is also enough for most retail bots (300M compute units/mo). QuickNode is more expensive but has dedicated-node options if you need predictable performance.
Can I host my own Polygon node?
Yes, but it is overkill unless you are running a high-frequency bot or doing heavy on-chain analytics. A Polygon full node needs ~1 TB SSD and weeks of sync time. The cost in disk + maintenance usually exceeds a paid RPC plan for any retail-scale bot.
What WebSocket should I subscribe to?
For Polymarket order book data, subscribe to Polymarkets own WebSocket at wss://ws-subscriptions-clob.polymarket.com/ws/market. For Polygon block events (rare for most bots), subscribe to your RPC providers WS endpoint (e.g., wss://polygon-mainnet.g.alchemy.com/v2/YOUR_KEY).
How do I avoid hitting rate limits?
Cache aggressively (order book snapshots, gamma metadata), use WebSocket for real-time data instead of polling, batch read calls when possible, and add a backoff on 429 responses. Most rate-limit hits we see are from poorly-coded loops, not real demand.
