Capri Ai Agentpay

Capri AgentPay is a governed payment layer designed specifically for AI agents that need to interact with paid APIs, settle transactions, and manage budgets autonomously. As autonomous agents become more capable, the traditional approach of handing them a private key introduces a critical security vulnerability: a single malicious or poorly constructed prompt can drain an entire wallet with no oversight. Capri AgentPay solves this by inserting a runtime policy engine between the agent and the signing mechanism, ensuring that every payment is evaluated against a fixed set of rules before any signature is created. The product is built for engineering teams shipping agent systems in production who need real controls over spending, approval workflows, and audit trails. Its core value proposition is enabling agents to call paid endpoints and settle transactions safely, without exposing raw key material. The system handles HTTP 402 Payment Required challenges by intercepting them, evaluating policies in a strict order (merchant allowlist, per-transaction cap, daily budget, auto-approve threshold), and only settling if all checks pass. After settlement, Capri retries the original request with proof attached and stores a signed receipt that can be verified offline. This approach transforms agent payments from a security nightmare into a controlled, auditable process that satisfies both engineering and security teams.

x402 Payment Handling

Capri AgentPay natively supports the HTTP 402 Payment Required challenge, a standard that allows APIs to request payment before serving data. When an agent makes a request and receives a 402 response, Capri intercepts the challenge, evaluates the configured policy, and handles the payment settlement automatically. This eliminates the need for agents to manage payment logic or hold credentials directly, making the entire flow seamless from the agent's perspective.

Per-Agent Budgets and Caps

Each agent can be assigned its own spending budget and per-transaction caps, providing granular control over how much an individual agent can spend. Budgets are enforced at runtime, preventing any single agent from exceeding its allocated resources even if a prompt goes rogue. This feature is essential for teams running multiple agents with different roles, risk profiles, or funding sources.

Merchant Allowlists

Operators can define allowlists of approved merchants or API endpoints that agents are permitted to pay. Any payment request to a merchant not on the allowlist is automatically denied, providing a first line of defense against unauthorized spending. This allows teams to curate a set of trusted services that their agents can interact with, reducing the attack surface significantly.

Human-in-the-Loop Approvals

When a payment request exceeds a configurable auto-approve threshold, Capri pauses the transaction and routes it to a human operator for review. The operator sees the exact amount, asset, chain, and recipient before making a decision. This hybrid approach balances autonomy with oversight, allowing routine small payments to flow automatically while flagging larger or unusual transactions for human judgment.

Autonomous Research Agents Calling Paid Data APIs

Research agents that need to access premium data sources, such as financial market feeds, scientific databases, or proprietary analytics, can use Capri AgentPay to pay per-API-call without holding a key. The agent requests data, Capri handles the 402 challenge, checks the merchant allowlist and budget, and settles the payment. The research team gets a verifiable receipt for every data purchase.

Multi-Agent Workflows with Shared Budgets

Teams running multiple specialized agents that share a common budget can use Capri to enforce spending limits across the group. For example, a content generation agent, a data enrichment agent, and an image generation agent can all draw from the same daily budget, with Capri tracking each agent's consumption and denying requests when the budget is exhausted.

Internal Tool Automation with Payment Gates

Organizations that expose internal APIs with usage-based pricing can integrate Capri AgentPay as a payment gate for their own services. Internal agents that call these APIs are subject to the same policy checks, ensuring that internal tool usage is tracked, budgeted, and auditable. This prevents cost overruns and provides clear attribution for infrastructure spending.

Compliance-Driven Agent Deployments

In regulated industries, agents that handle payments must leave an audit trail. Capri AgentPay stores signed receipts for every settled transaction, which can be verified offline by compliance teams. This provides cryptographic proof of each payment, including the merchant, amount, timestamp, and policy outcome, satisfying audit requirements without slowing down agent operations.

How does Capri AgentPay protect against a compromised agent?

Capri AgentPay ensures that even if an agent is compromised or given a malicious prompt, it cannot spend beyond the configured policy boundaries. The agent never holds a private key or signing capability. Every payment request is evaluated against the merchant allowlist, per-transaction cap, daily budget, and auto-approve threshold before a signature is created. If any check fails, the payment is denied.

What happens when a payment exceeds the auto-approve threshold?

When a payment request exceeds the configured auto-approve threshold, Capri pauses the transaction and sends a notification to the designated human operator. The operator is presented with the exact details of the request, including the amount, asset, chain, and recipient. They can then approve, deny, or modify the request. The agent waits for the human decision before proceeding.

Can I verify receipts offline without connecting to Capri?

Yes. Every settled transaction produces a signed receipt that includes cryptographic proof of the payment details, policy outcome, and settlement. This receipt can be verified offline using standard cryptographic tools, without any connection to Capri's infrastructure. This is designed to support audit and compliance requirements where offline verification is necessary.

Which blockchain networks does Capri AgentPay support for settlement?

Capri AgentPay currently supports settlement on Base Sepolia for sandbox testing, with plans to expand to additional networks. The sandbox environment allows teams to test their agent payment flows, policy configurations, and receipt verification processes in a safe, testnet setting before moving to production on mainnet networks.