Polygon PoS Blockchain API
Polygon Scan API – Free Access to Polygon Blockchain Data
Polygon Scan API Key
Get a free Polygon Scan API key in minutes. Access up to 100,000 API calls per day with 5 requests per second on the free tier.
API Endpoints Reference
Complete REST endpoint documentation covering accounts, contracts, transactions, blocks, gas tracker, tokens, and event logs for Polygon PoS.
Polygon PoS API
Access the Polygon Proof of Stake chain — Chain ID 137, 2-second block times, sub-cent fees, and full EVM compatibility on both mainnet and Amoy testnet.
Why Use PolygonScanAPI
The Developer-First Polygon Blockchain API
PolygonScanAPI provides reliable, real-time access to Polygon PoS blockchain data for developers worldwide.
James Wilson
�?IT Support Specialist
Transaction & Account API
Smart Contract & Token API
Fetch smart contract ABIs, verified source code, and ERC-20/ERC-721/ERC-1155 token transfer histories. Programmatically verify contracts and query token metadata for any asset on Polygon PoS.
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Don't get left behind
Start with a free API key and scale to Pro as your Polygon application grows.
Help Center
Got a question? Get your answers
01. What is the Polygon Scan API?
The Polygon Scan API is a REST API providing programmatic access to Polygon PoS blockchain data — transactions, account balances, smart contract ABIs, token transfers, event logs, gas prices, and network statistics. All endpoints accept GET/POST requests and return JSON.
02. Is the Polygon Scan API free to use?
Yes. The free plan provides up to 100,000 API calls per day with a 5 requests-per-second rate limit. No credit card is required. Paid plans offer higher throughput and access to PRO endpoints for production-scale applications.
03. What modules and endpoints are available?
The API covers eight modules: account (balances, transactions, token transfers), contract (ABI, source code, verification), transaction (status, receipts), block (rewards, timestamps), logs (event filtering), token (ERC-20 info), stats (POL supply and price), and gastracker (gas oracle).
04. How do I handle rate limit errors (HTTP 429)?
When you exceed 5 requests per second, the API returns HTTP 429. Implement exponential back-off: wait 1 second then retry; if still rate-limited wait 2 seconds, then 4 seconds. Use batch endpoints like balancemulti to reduce total call count and cache static data client-side.
05. Does the Polygon API support the Amoy testnet?
Yes. Use api-amoy.polygonscan.com as the base URL with the same endpoint structure and your existing API key. The Amoy testnet (Chain ID 80002) replaced the Mumbai testnet in 2024 and is the recommended Polygon PoS development and testing environment.