Public prices. Start free.
Nymbrink keeps a record of what your AI suppliers state, tells you when it changes, and signs the record of your team’s decision. Publishing your own Provenance passport is free, always.
Monitoring
For teams that buy or deploy AI agents from suppliers: procurement, third-party risk, security, compliance and AI governance. You pay for the agents you keep a record of.
Free
$0
- Up to 3 agents, checked weekly
- Your rules, approvals and the Rule of 2
- Reports, email alerts, tags
- Download your list as a file
Paid
$19 an agent a month, from your 4th agent. Every agent checked daily.
- Everything in Free
- Alerts by email, Slack, Teams and signed webhooks
- The API and the MCP connection for your own AI agents
- Signed audit exports with a readable PDF
- A 30-day trial, once per company, with no card needed until it ends
From 11 agents a bundle costs less, and you always pay the cheapest way: 25 agents for $149, then $6 each · 100 for $449, then $5 each · 250 for $899, then $3.50 each. Pay yearly and get 2 months free.
What you would pay each month
| Agents | Price |
|---|---|
| 3 | $0 |
| 10 | $133 (7 × $19) |
| 25 | $149 |
| 50 | $299 |
| 100 | $449 |
| 250 | $899 |
Every paid plan has the same features. No feature is kept for a bigger plan.
About the Rule of 2: an agent may combine any two of these, but not all three unless a person approves each outward action: it reads content outsiders can write, it can reach sensitive data, it can act on its own towards the outside. Nymbrink checks this against what the agent declares. It does not check how the agent is actually built, and the result is not a verdict on it.
Publishing
For companies that build AI agents and publish a Provenance passport. Publishing a signed declaration and checking it with the open tools is free for everyone, with no Nymbrink account. The passport is yours and works without Nymbrink.
Free
$0, always
- A public page for every agent you publish
- A live badge that reads “Signature and address checked” only while checks are current
- Your trust page
- Checked weekly
Publisher Pro
$149 a month per company. Yearly: $1,490 (2 months free).
- Up to 50 published agents, then $3 each
- Change preview before you publish
- Who watches your agents (in ranges, never by name)
- Signed track records and private trust links
- Daily checks
If your company also uses agents from suppliers, that is Monitoring. Agents you run for yourselves count like any agent you use.
Larger lists or a contract
Need a contract, help importing a large supplier list, or connecting your systems? Email business@nymbrink.com and tell us what you need. Enterprise starts at the 250-agent price ($899 a month), and anything extra is itemised in a written contract. Setup help is a separate one-time fee for any paying customer.
Questions
- What counts as one agent?
- Each passport you watch counts as one. Everything Nymbrink reads on one supplier’s website (its policy pages and its agent card) counts once, together. An MCP server counts as one. Updating a document at the same address never adds a charge. A supplier’s passport and its website count as two, because Nymbrink does not guess that they are the same agent.
- What happens when I add a 4th agent?
- From the 4th agent you pay $19 an agent a month, and every agent is checked daily. Your company’s first subscription can start with a 30-day trial and no card. If no card has been added when the trial ends, the subscription stops and nothing is charged.
- Can I leave, and keep my records?
- Yes. Cancel at any time in Settings → Billing, and your plan runs to the end of the period you have already paid for. Download your signed audit export before you go: it checks with the free open tools. Stamps Nymbrink has already issued stay valid signed records of what it observed, even after you close your account.
- Does publishing a passport cost anything?
- No. Publishing and checking a passport is free and needs no paid plan or Nymbrink account. The open standard and its tools work without us.
- What if checks stop?
- We aim to keep Nymbrink running and to tell you when a scheduled check did not happen. Stamps expire, so a record nobody is checking any more shows as not current rather than looking fresh. The badge reads “Signature and address checked” only while checks are current.
- Do you offer enterprise terms?
- Email business@nymbrink.com. Enterprise and setup help are provided under a separate written quote or contract.