Sourcify 4byte (openchain.xyz signature API successor)
key-free-public
Key-free with no quota published. 9,340,765 total signatures as of the site's stats refresh: 4,102,225 function, 906,923 event and 346,812 error signatures found in verified-contract ABIs, plus 3,996,703 public submissions.
Not published.
No paid tier.
n/a (free, no billing)
Chain-agnostic, built from Sourcify's verified-contract corpus, so coverage tracks the EVM chains Sourcify verifies rather than any single chain.
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fresh · last checked 2026-09-18
evm
- api.contract
- function signature lookup
- event signature lookup
- error signature lookup
- openchain.xyz-compatible api
Change history1 entries · newest first
- new service
Sourcify 4byte (openchain.xyz signature API successor) added to the tracker (data_apis)verified
Newly tracked provider. Free tier: Key-free with no quota published. 9,340,765 total signatures as of the site's stats refresh: 4,102,225 function, 906,923 event and 346,812 error signatures found in verified-contract ABIs, plus 3,996,703 public submissions. Rate limit: Not published. Paid from: No paid tier.