Prove agent-to-agent transactions with delegation chains.
In an Agent2Agent (A2A) environment where autonomous AI agents transact with each other, record each agent's delegated authority as a chain, so you can verify with Lemma whether the final transaction rests on a legitimate chain of delegations.
Three voices from the front line.
- A2A developer
“We want to implement delegation across multiple agents in an auditable form”
- Protocol operations
“We want the legitimacy of agent-to-agent transactions to be third-party verifiable”
- Audit
“We want accountability for AI-agent transactions kept as a chain”
Hand over the source, or just the facts?
Nothing changes on the floor. Everything changes for the receiver.
① Your team just saves, as always.
- The usual step
- Fill in the record and save
- On save
- A proof is attached (API, behind the scenes)
- The document itself
- never sent
② They just open a link.
- Proven fact
- the delegation chain and the transaction's legitimacy
- the delegation relationships and transaction contents
- not shown
- Login / keys
- not needed
- The document stays private — the record itself is never sent or disclosed.
- Independent verification — the receiver just opens a link. No account, no keys.
- Edits are detected — even a one-character edit fails verification.
Hierarchical delegations — root org → agent → sub-agent — are each issued as a signed proof. Before a transaction, the delegation chain is verified to be in scope at runtime; if the chain is broken, the transaction does not settle. Without disclosing the delegation relationships or transaction contents, the chain can be traced from the final transaction back to its origin and its legitimacy independently verified.
See the technical details ↗Why the usual methods fall short.
Only work that needs all three at once — pass without exposing, independent verification, tamper-evidence — is Lemma's domain.
| Method | Pass without exposing | Independent verification | Tamper-evident | What happens |
|---|---|---|---|---|
| Access control / permissions | △ | ✗ | ✗ | “Someone inside could have edited it” remains possible |
| Masking / redacted copies | △ | ✗ | ✗ | Redaction work grows; the original is still unproven |
| Encrypt and store / send | ✓ | ✗ | ✗ | To verify, the receiver needs it disclosed after all |
| Lemma (ZK proof)the only one with all 3 | ✓ | ✓ | ✓ | The receiver just opens a link |
How it works — and how to start.
We help design disclosure scope and retention, run the PoC, and support production.
Start with a 30-minute call.
Tell us one theme where you want agent-to-agent transactions made auditable, in the first 30 minutes. No disclosure of the delegation relationships required.
Related use cases
Find the case that matches your industry and problem
Browse all 36 use cases →TRY LEMMA
Run it yourself.
No sales call needed — start hands-on with Lemma's products.