vouch-crewai
A CrewAI tool that issues Vouch Credentials, so the agents in a crew can cryptographically authorize their tool calls, including across delegation.
Each signed call carries a W3C Verifiable Credential with an eddsa-jcs-2022
Data Integrity proof. When a supervisor agent delegates to a worker, the
worker's credential extends the supervisor's chain and can only narrow the
authority, never broaden it.
Install
pip install vouch-crewai
This pulls in vouch-protocol[crewai].
Configure
VOUCH_PRIVATE_KEYthe agent's private key (JWK JSON string).VOUCH_DIDthe agent's DID, e.g.did:web:agent.example.com.
Use
from vouch_crewai import sign_request
# Give the tool to a CrewAI agent. It calls it before an authenticated request.
credential_json = sign_request(
action="read",
target="https://api.example.com",
resource="customer:123",
)
Delegation between agents
See examples/integrations_delegation.py in the main repo for a supervisor
that issues a broad credential and a worker that narrows it under capability
attenuation.
Verify on the receiving side
from vouch import Verifier
ok, passport = Verifier.verify_credential(received_json, public_key=agent_pubkey)
License
Apache-2.0.
1 maintainer
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