Supported Chains

Herd separates registered EVM support from full indexing. A tool’s chain parameter enforces the correct tier.

Availability by tier

Capability	All registered EVM chains	Fully indexed chains
Inspect a transaction by hash	✓	✓
Run HAL reads and simulations	✓	✓
Save chain-aware bookmarks	✓	✓
Read verified contract metadata and source	Most chains	✓
Search recent function calls and event logs	—	✓
Analyze wallet transactions, token activity, and deployments	—	✓

Contract metadata and source search require an available code explorer. Polygon zkEVM, Sophon, and Swell do not currently support these features.

Herd maintains complete historical activity indexes for:

Full activity indexing

Full activity indexing

Full activity indexing

The following slugs are accepted by Herd’s EVM registry:

Chain registration does not imply full historical indexing. Use the capability table above before choosing an activity or aggregate tool.