/API TERMS
API Terms/Crypto & Blockchain/WatchData

WatchData

watchdata.io

Provides JSON-RPC API access to blockchain data (balances, transactions, blocks, token transfers, prices) across Ethereum, Polygon, BSC, Tron and Bitcoin.

The WatchData API uses api key authentication; has freemium pricing; offers a free tier (Free plan $0/month with 100,000,000 watch units per month and 5 apps). Verified 2026-07-12 with per-field source links.

Crypto & Blockchain Verified 2026-07-12 medium confidence
Base URL
https://ethereum.api.watchdata.io/node/jsonrpc
docs.watchdata.io ↗
Auth
api_key
docs.watchdata.io ↗
Free tier
Free plan $0/month with 100,000,000 watch units per month and 5 apps
watchdata.io ↗
Pricing model
freemium
watchdata.io ↗
Pricing
Free $0; StartUp $49/mo (200M units, 10 apps); Business $99/mo (450M units, 15 apps); Production $299/mo (600M units, 20 apps); Enterprise contact sales. Annual 15% off. Card or crypto accepted.
watchdata.io ↗
Rate limits
not documented null
no source
OpenAPI spec
not documented null
no source
MCP server
not documented null
no source