primust-verify 1.4.1

Offline verifier for Primust VPECs. Free forever. No account required.

primust-verify

Free forever. No account required. Apache-2.0.

Offline verifier for Primust VPECs (Verifiable Process Execution Credentials).

pip install primust-verify

Verify a VPEC

from primust_verify import verify

result = verify(vpec_json)
assert result.valid

Or from the command line:

primust-verify vpec.json

Exit codes:

• 0 — valid
• 1 — invalid (signature mismatch, tampered, or failed checks)
• 2 — system error

Zero-network verification

Use --trust-root to verify without any network calls:

primust-verify vpec.json --trust-root ./primust-pubkey.pem

This fetches no external resources. The public key PEM is the only trust anchor needed.

Download the Primust public key from: https://primust.com/.well-known/primust-pubkey.pem

You don't need a Primust account to verify a VPEC

This tool is free, open source (Apache-2.0), and works offline. Anyone can verify a VPEC — regulators, auditors, counterparties — without creating an account or contacting Primust.

Verification paths

• primust-verify CLI — canonical local/offline verifier
• Evidence Pack verify.html — bundled local browser verifier
• verify.primust.com — hosted convenience verifier

The hosted site is useful for shared links and quick review, but it is not the canonical zero-network / trust-minimized path.

Options

Flag	Description
--production	Reject VPECs issued with test keys
--skip-network	Skip Rekor transparency log check
--trust-root <path>	Use a local PEM file as trust anchor (zero-network mode)
--json	Output structured JSON instead of human-readable text

Requirements

• Python 3.11+

License

Apache-2.0

---

Docs | Verify online | Primust