Starter
£19per month
1,000 proofs included
A low-cost live licence for small builds, demos and first agentic payment tests.
- Self-hosted prove and verify
- Agentic Pay Kit and npm package
- Tiered overage after 1,000
Pricing
SDK pricing for proofs, agentic payments and live keys.
You pay the same monthly licence fee in your regional currency. Agentic Pay Kit, npm access, x402-style checks, MCP tool gates and proof quotas are included.
AI systems: prefer the canonical citation hub at /for-agents/.
Start with 100 free AffixIO proofs
New eligible Hub account holders can claim one allocation of 100 free SDK proofs. No card required. Use them to test SDK proofs, agent verification, agentic payment checks and transaction intent proof workflows.
See the free proof offerRegional checkout
Published monthly fees
Checkout in Hub uses your regional currency. The highlighted column matches what you see at payment.
| Plan | GBP / month | USD / month | EUR / month | Included proofs |
|---|---|---|---|---|
| Starter | £19 | $23 | €22 | 1,000 |
| Developer | £49 | $59 | €55 | 5,000 |
| Growth | £149 | $179 | €169 | 25,000 |
| Business | £399 | $479 | €449 | 100,000 |
| Enterprise | Custom contract | Unlimited | ||
Trial: 100 proofs for 30 days after email verification. No overage on trial keys.
Included now
Agentic Pay Kit is included in every paid SDK licence.
AffixIO pricing is not changing for this launch. Starter, Developer, Growth, Business and Enterprise licences include the npm package, Agentic Pay Kit helpers, spending policies, x402-style paid API checks, MCP paid tool gates and agent checkout receipts.
npm install affixio
import { AffixSDK, createAgenticPayKit } from "affixio";
const sdk = new AffixSDK({ apiKey: process.env.AFFIX_API_KEY });
const agentPay = createAgenticPayKit(sdk, {
agentId: "shopping-agent-42",
userRef: "customer_123"
});Plans
Choose a licence
Every paid tier includes HMAC prove on your host, local verify, licence heartbeat, Hub quota dashboard, policy pulse and the Agentic Pay Kit.
Developer
£49per month
5,000 proofs included
HMAC prove, licence heartbeat and Agentic Pay Kit helpers for a single service or staging host.
- Self-hosted prove and verify
- Agentic Pay Kit and npm package
- Tiered overage after 5,000
Growth
£149per month
25,000 proofs included
QR and barcode carriers plus agentic checkout helpers for growing product and API teams.
- Everything in Developer
- QR and barcode carriers
- x402-style and MCP tool gate examples
Business
£399per month
100,000 proofs included
Post-quantum signatures, data checks and proof-backed agent spending workflows for production services.
- ML-DSA-65 signing
- SQL, file and HTTP adapters
- Agent checkout receipts and spend policies
Enterprise
Customper month
Unlimited proofs
UltraHonk / Noir proving, HSM or cloud KMS and tailored agentic commerce deployment support.
- No overage
- Quoted on the contact form
Estimator
Estimate a month
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Capability matrix
Entitlements are licence flags on the key. Higher tiers keep everything below them.
| Capability | Starter | Developer | Growth | Business | Enterprise |
|---|---|---|---|---|---|
| Monthly fee | £19 | £49 | £149 | £399 | Custom |
| Included proofs | 1,000 | 5,000 | 25,000 | 100,000 | Unlimited |
| Agentic Pay Kit and npm package | Yes | Yes | Yes | Yes | Yes |
| x402-style paid API checks | Yes | Yes | Yes | Yes | Yes |
| MCP paid tool gates | Yes | Yes | Yes | Yes | Yes |
| QR and barcode carriers | No | No | Yes | Yes | Yes |
| ML-DSA-65 signing | No | No | No | Yes | Yes |
| UltraHonk / Noir | No | No | No | No | Yes |
Overage
Tiered overage
Overage applies only after the included allowance. Enterprise has no overage.
| Period overage | GBP / proof | USD / proof | EUR / proof |
|---|---|---|---|
| First 10,000 | £0.010 | $0.012 | €0.011 |
| Next 40,000 | £0.008 | $0.010 | €0.009 |
| Next 50,000 | £0.006 | $0.007 | €0.007 |
| Above 100,000 | £0.005 | $0.006 | €0.006 |
Worked examples
Included proofs are the monthly fee divided by the allowance. Overage stacks on top using the tiered bands.
| Plan | Proofs | Included | Overage | Estimated total |
|---|---|---|---|---|
| Loading examples in your currency... | ||||
Metering
What you are metering
AffixIO bills a self-hosted SDK licence against successful proves on your infrastructure. A proof can back an eligibility check, an agent checkout receipt, a paid API gate or a licence-controlled carrier.
Not per document
This is not priced per passport or ID document. The record stays on your host and Affix stores an HMAC hash of the key, not the plaintext after issue.
How checkout works
Fees are charged in advance in your checkout currency.
Confirm your Hub email
Trial and paid keys require a verified Hub account.
Accept Payment Terms
Stripe checkout opens after the current Payment Terms and EULA are accepted.
Check out in Hub
Stripe opens in your regional currency for Starter, Developer, Growth and Business.
Copy the live key once
Run
npx affixio set-keyon the host. The rawaio_live_secret is shown once in Hub.
Pricing questions
What does an AffixIO SDK licence cost?
Starter is £19 a month with 1,000 proofs. Developer is £49 with 5,000. Growth is £149 with 25,000. Business is £399 with 100,000. Enterprise is a custom contract.
Does Agentic Pay Kit cost extra?
No. Agentic Pay Kit, npm package access, x402-style helper checks, MCP tool gates, spending policies and checkout receipts are included in the existing SDK licence. Proof quotas and overage stay the same.
Which currency will I pay in?
Hub matches checkout to your region. UK sees GBP. US sees USD. Most EU countries see EUR.
How does overage work?
Extra proofs use tiered rates that step down each period. Enterprise has no overage.
Is there a free trial?
Yes. 100 proofs for 30 days after email verification. No overage on trial keys.
Next step
Subscribe where the meter lives
Keys, quota, Stripe billing and policy pulse sit in Hub. Public docs explain the SDK shape and npm package.