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 delegation as a chain. Lemma makes it verifiable 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?
Change what reaches the AI, and the leakage risk goes with it.
- from_agent:
- A-001
- to_agent:
- A-002
- tx:
- 250 USDC
- purpose:
- data_purchase
- chain:
- ? (basis unknown)
- agent:
- did:lemma:agent-A-002
- delegatedBy:
- did:lemma:org-acme-fin
- role:
- settlement_agent
- chain:
- [org-acme-fin → A-001 → A-002]
- scope:
- a2a://acme.fin/*
- validUntil:
- 2026-12-31
- ZK verified:
- ✓ VALID
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 ↗Choose on three criteria.
Only work that needs all three at once — pass without exposing, independent verification, tamper-proof — is Lemma's domain.
| Method | Pass without exposing | Independent verification | Tamper-proof |
|---|---|---|---|
| Access control only | △ | ✗ | ✗ |
| Masking / anonymization | △ | ✗ | ✗ |
| Encryption only | ✓ | ✗ | ✗ |
| Lemma (ZK proof)the only one with all 3 | ✓ | ✓ | ✓ |
What's next
We enter through delegation-chain design and a PoC, and stay alongside you through to operations.
- A 30-minute review — identify the agent roles and delegation patterns in your A2A transactions.
- Design the delegation chain — define the hierarchical authority structure (root org → agent → sub-agent).
- Connect to your A2A protocol — place Lemma's chain-verification layer in front of the transaction.
- Prove one path via a PoC — implement one type of A2A transaction in 4 weeks, confirming chain verification and out-of-scope stops.
- Hands-on support through operations — existing plan tiers (Civic / Critical / Compliance) serve only as a cost reference; the setup and pricing are designed together.
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.
The bigger picture
The bigger picture this use case belongs to.
We map use scenarios across industries and workflows by the four axes.
See use scenarios for Agent Authority in Solutions →TRY LEMMA
Run it yourself.
No sales call needed — start hands-on with Lemma's products.