The dependency you keep paying for
If you build agents that transact across organisational boundaries, you already know the shape of the problem. Each time your agent meets a counterparty it has not met before, it authenticates that party, re-checks its authority, and re-verifies whatever credential the transaction depends on. There is no shared way to rely on a check someone else has already performed, so the work is repeated pairwise, and the number of pairs grows faster than the number of parties.
The two escapes on offer are both unacceptable under fiduciary governance: trust the claim blindly and risk acting on an impersonation or a fraudulent assertion, or refuse to proceed and wrongfully reject valid transactions out of over-caution. Neither gives your governors something they can audit.
What the exchange changes
Signura removes the repetition without removing the accountability. An issuer signs the claim and names who stands behind it; your agent verifies that proof at the moment it acts and retains it. The attestation carries explicit scope, so you know exactly what was asserted and what was not. It carries revocation and freshness status, so a claim that was true last week but no longer holds fails verification. And it carries a named liable party, because transferable reliance without someone accountable for the claim is the gap the exchange exists to close.
Why it is not another protocol to bet on
You may be waiting to see which inter-agent protocol prevails before committing to a reliance layer. That caution is reasonable, and it is why Signura is not another protocol. It is built on the ratified W3C Verifiable Credentials 2.0 substrate and aligned with the direction of eIDAS 2.0, so the attestations you verify are standards-based artefacts rather than a proprietary format you would later have to unwind. The exchange is neutral by design: it sits between issuers and relying agents and takes neither side's part. If a transport later carries these credentials natively, standards-based attestations travel with it.
The integration surface is deliberately small. Your agent already extends OAuth 2.0 and OpenID Connect and defers delegated authorization to external identity providers per integration. Signura replaces the per-counterparty re-verification step with a single query-and-verify call and returns a proof you keep. Agent discretion is bounded by the scope, value thresholds and expiry your governor configures, and anything beyond those bounds is escalated rather than decided by the agent. No material commitment is made purely on agent discretion — the audit trail exists to make that accountability real rather than nominal.