Blockscout vs The Graph

Blockscout is the open-source, EVM-compatible block explorer behind dozens of public chain explorers (Ethereum mainnet, its L2s, and more), and its REST v2 API exposes the same block, address, token, and transaction data that powers those explorer UIs. No signup or API key is required for the per-instance hosted public REST API, though anonymous callers are rate-limited per endpoint (confirmed live: `x-ratelimit-limit` varies by route, e.g. 180 on an address lookup vs. 10 on `/stats`); docs.blockscout.com also flags this per-instance API for deprecation in favor of a separate, paid, API-key-gated multichain "PRO API," though the free per-instance API this entry tracks was still live and keyless as of this run's probe. Every response is JSON.

The Graph indexes onchain data into open GraphQL subgraphs that any client can query through its hosted Gateway, covering Ethereum and dozens of other networks without a per-chain node integration. The Gateway requires a bearer token issued from Subgraph Studio, billed on a usage-based model with a free monthly query allowance before paid billing applies. Every query and response travels as GraphQL over HTTPS.