actionproof 0.0.1

Verifiable receipts that prove what an AI agent did. Sign locally, verify anywhere, zero backend.

ActionProof (Python)

Verifiable receipts that prove what your AI agent did. Sign locally, verify anywhere, zero backend. Receipts are cross-compatible with the TypeScript library — a receipt signed in one verifies in the other.

from actionproof import attest, verify, generate_keypair

agent = generate_keypair()

receipt = attest(
    agent,
    type="email.send",
    summary="Sent renewal quote to [e-mail]",
    params={"to": "[e-mail]", "amount": 4200},  # hashed, not stored in clear
    result={"smtp": 250},
    outcome="ok",
)

verify(receipt)  # -> VerifyResult(valid=True, agent="did:key:z6Mk...")

Auto-emit receipts

Decorator — every call to the function emits a signed receipt:

from actionproof import attest_action

@attest_action(agent, type="email.send", on_receipt=store)
def send_email(to, body): ...

LangChain / CrewAI — attest every tool the agent runs, no per-tool code:

from actionproof import ActionProofCallbackHandler

handler = ActionProofCallbackHandler(agent, on_receipt=store)
agent_executor.invoke(input, config={"callbacks": [handler]})

Install & test

pip install -e ".[dev]"
pytest tests/          # 7 tests incl. a TS↔Python cross-language interop check

Requires cryptography. The optional langchain extra makes the callback handler a real BaseCallbackHandler; without it, the handler still works as a plain object.