Safe Authority Fingerprint Check

API ↗

Safe Authority Fingerprint Check is a paid API for AI agents from api402x.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Cheaply polls whether the spending authority of a Gnosis Safe has changed by comparing a stored fingerprint against the current on-chain state.

How this service works

Cheap poll: has the spending authority over this Safe changed since you last looked? You pass the fingerprint this route gave you last time; it recomputes the current one and compares. Call it with no fingerprint to get a baseline. The fingerprint covers owners, threshold, guard, moduleGuard, the singleton implementation, and the whole module graph including the owners and threshold of modules that are themselves Safes -- a change one level down flips it, which a flat owner list would miss. It deliberately excludes the nonce, so ordinary transactions do not read as an authority change. Nothing is stored on our side: you hold the baseline, so there is no account and no subscription. No archive reads either, which is why this is cheap; when it reports changed, buy GET /safe-signer-drift for what changed and in which block. A truncated walk returns indeterminate, never unchanged. Required: chain_id and address. Optional: fingerprint.

Output

Returns a JSON object with a status field ('baseline', 'unchanged', 'changed', or 'indeterminate'), the current fingerprint hash, the timestamp of the check, and optional detail and covers fields describing what the fingerprint encompasses. If status is 'changed', the agent should follow up with GET /safe-signer-drift to get what changed and in which block. 'Indeterminate' means the module graph walk was truncated and the result is inconclusive.