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APIs Score

Free Blockchain APIs

5 free APIs in Blockchain that require no authentication. Start building immediately — no API key needed. 11 total Blockchain APIs available.

All Blockchain APIs (11) → Compare Blockchain APIs → Blockchain API Guide →

Chainlink

87

Chainlink is a decentralized oracle network that connects smart contracts to real-world data like price feeds, random numbers, and external APIs.

No Auth Beginner HTTPS 134ms

Chainpoint

⭐ Beginner's Pick
82

Chainpoint anchors any data hash to the Bitcoin blockchain, creating a tamper-proof proof of existence for documents, records, or any digital content.

No Auth Beginner HTTPS 222ms

Helium

⭐ Beginner's Pick
82

The Helium API provides access to legacy blockchain data for the Helium IoT network — hotspot locations, earnings, network coverage, and device activity.

No Auth Beginner HTTPS 331ms

Steem

⭐ Beginner's Pick
82

Steem is a blockchain-based social media platform with a public API for reading posts, comments, votes, account data, and blockchain operations.

No Auth Beginner 46ms

Walltime

⚠ Unavailable
0

Walltime provides programmatic access to to retrieve walltime's market info via REST API.

No Auth Beginner HTTPS 3680ms

Need more Blockchain APIs?

There are 6 more Blockchain APIs that require authentication (API key or OAuth).

Browse all 11 Blockchain APIs →