# Pricing

Source: https://www.primust.com/pricing
HTML title: One Price. Per Governed Action. — Primust
Meta description: No seats. No proof-floor surcharge. No per-check meter. One Pipeline() open-to-close is one billable governed action.

← Primust · Pricing
# One price. _Per governed action._

No seats. No proof-floor surcharge. No metered check counts. A governed action is one _Pipeline()_ open-to-close — and it costs the same whether it runs three checks or three hundred.

§ 01 — The plan

Pay as you go

$0.25

per governed action

Get API key →

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One governed action = one Pipeline() open-to-close

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Regardless of how many checks run internally

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No proof-level surcharge — all levels same price

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No contract, no commitment, no seat licenses

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Production keys (pk_live_)

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Audit-acceptable VPECs

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All proof levels: Attestation → Mathematical

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All adapters and connectors included

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Open-source verification is free — primust-verify is Apache-2.0

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Offline-verifiable credentials — no callbacks to Primust

§ 02 — How billing works

## Seven rules. _That's the whole contract._

Governed action

One Pipeline() open-to-close. Three checks or three hundred — same price.

Proof level

Attestation, Execution, Verified Model, Witnessed, Mathematical all bill the same.

Blocked actions

Blocked attempts generate a VPEC and count as one governed action.

Verification

Free. primust-verify runs locally without calling Primust.

Sandbox keys

pk_sb_ keys are free and unlimited. Not audit-acceptable — swap to pk_live_ to ship.

Key swap

Production swap is one env var. No code changes. No re-instrumentation.

Onboarding

primust init — one command: resolves the API key (RFC 8628 device flow), detects installed frameworks, wires the Claude Code hook if present. Keys land in ./.primust/config.toml (project) or ~/.primust/config.toml (--global) — never in shell history or .env files. primust whoami / logout for rotation; primust auth on its own for headless CI.

§ 03 — The math

## Predictable. _Even under load._

# A representative month

agent_sessions 10,000

checks_per_session_avg 14

billable_actions 10,000 # not 140,000

 

rate $0.25

total $2,500

 

# Add 300 checks to a session. Price: $0.00 more.

# Raise proof floor to Mathematical. Price: $0.00 more.

§ Ship

## Swap one env var. _That's production._

No re-instrumentation. No new SDK. No integration call. Every VPEC your sandbox produced had the same schema as the ones you'll ship — minus the _pk_live__ signing key.

Get API key Read the VPEC spec →