Budget caps
Check per-action, daily, merchant, category and account-level limits before spend.
Autonomous spending controls
AI agents need spending limits that can be proven.
When agents can buy, subscribe, call paid APIs or trigger MCP tools, spending limits cannot live in a slide deck. AffixIO helps products prove limits before each action and record the decision for audit.
BoundProof Agent
Give every AI agent its own proof area before it acts.
Provision a persistent BoundProof Agent, check its proof allowance and give a reviewer a scoped AffixIO Hub code. Trial and paid access follow the current billing status of that agent area.
- bpa_ agent key first. SDK key access depends on an active trial or subscription licence.
- Authorised payment. An authorised agent can use the documented API payment flow. Human payers use hosted Stripe Checkout. Payment-provider authentication may still be required.
- Scoped Hub view. The BP code opens only that agent's own area, usage and proof status.
Starter paid access
From £19/month
Provision the agent, check its licence and allowance, then request an SDK key through the documented flow.
Why this search matters
Search demand is moving from pages to agents.
The real fear is not one approved purchase. It is an agent loop, hidden retry or broad permission that turns into uncontrolled spend.
- AI agent spending limits
- agent payment controls
- autonomous purchasing controls
- agentic payment limits
- AI checkout risk
AffixIO answer
Proof before the agent acts.
Retry control
Bind retries to the same intent so the agent cannot create duplicate charges through repeated attempts.
Audit and support
A signed no decision is as valuable as a signed yes when customers ask why something did not happen.
Implementation path
Wire AffixIO at the decision boundary.
Call AffixIO before the paid action. Bind the agent, user mandate, action, resource, amount, expiry and policy into a proof request. Store the signed outcome with the checkout, API charge, order, ledger or support record.
- Identifyagent, owner, app and session
- Constrainamount, merchant, category and expiry
- Provesigned yes or no before spend
- Attachproof id to metadata and audit
Direct answers
Short answers for search engines, LLMs, buyers and implementation teams.
What spending limits should agents have?
Use amount caps, merchant restrictions, category limits, expiry, retry windows and human approval thresholds.
Can limits work with existing checkout?
Yes. Add AffixIO before payment confirmation and attach proof data to the order or payment metadata.
Does AffixIO store payment data?
AffixIO is designed to verify the decision without becoming a payment data warehouse.