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Public APIs · by APILayerData from public-apis (MIT)
  1. Home
  2. /Blockchain
  3. /Watchdata
Blockchain
Watchdata logo

Watchdata

Provide simple and reliable API access to Ethereum blockchain.

Watchdata API is a free Blockchain API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.

Authentication
apiKey
HTTPS
Yes
CORS
Unknown
Category
Blockchain
Visit documentation ↗docs.watchdata.io

About WatchData Documentation

Welcome to WatchData Documentation – Your infrastructure for building blockchain apps.

Provider
WatchData Documentation
Website
docs.watchdata.io ↗

Details from docs.watchdata.io.

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Watchdata API alternatives

W

Walltime

To retrieve Walltime's market info

No authHTTPSCORS ?
The Graph logo

The Graph

Indexing protocol for querying networks like Ethereum with GraphQL

apiKeyHTTPSCORS ?
TWZRD Agent Intel logo

TWZRD Agent Intel

Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets

No authHTTPSCORS
SwiftNodes logo

SwiftNodes

Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)

apiKeyHTTPSCORS
Steem logo

Steem

Blockchain-based blogging and social media website

No authNo HTTPSNo CORS
Nownodes logo

Nownodes

Blockchain-as-a-service solution that provides high-quality connection via API

apiKeyHTTPSCORS ?

Watchdata API FAQ

Who provides the Watchdata API?

The Watchdata API is provided by WatchData Documentation (docs.watchdata.io). Welcome to WatchData Documentation – Your infrastructure for building blockchain apps.

Is the Watchdata API free?

Yes. The Watchdata API is listed in the Blockchain category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the Watchdata API require an API key?

Yes. The Watchdata API uses apiKey authentication, so you need to register for credentials before making requests.

Can I call the Watchdata API from the browser?

CORS support for the Watchdata API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.

Does the Watchdata API support HTTPS?

Yes. The Watchdata API is served over HTTPS, so it's safe to use in production.