The secure payment layer for AI agents and machines.
Paratro combines MPC wallet infrastructure with native x402 protocol support — enabling AI agents, services and machines to make HTTP-native payments with enterprise-grade security, policy control and full auditability.
HTTP 402
Payment required
Policy Check
Limits verified
MPC Sign
3/5 threshold
Settled
On-chain confirmed
End-to-end x402 payment flow — from HTTP challenge to on-chain settlement in ~50ms
MPC signing for automated x402 payments
Policy-controlled spending for AI agents
x402 facilitator and payment relay
Full audit trail for every micro-transaction
MPC security meets x402 machine payments
A unified platform where threshold cryptography, approval policies and HTTP-native payments work together.
Multi-Cloud Key Sharding
MPC key shards are distributed across AWS, Google Cloud and Azure — no single cloud provider holds enough material to sign. Even if one cloud is compromised, your keys remain safe.
x402 Payment Gateway
Act as a facilitator for HTTP 402 payments. When a service returns 402 Payment Required, Paratro handles MPC-signed payment, verification and settlement automatically.
Policy Engine
Set spending limits, whitelist recipients, define rate limits and approval thresholds. AI agents pay autonomously within policy bounds — anything outside triggers human review.
Audit & Compliance
Every x402 payment is logged with full context: who requested, which policy matched, what was signed, and the settlement result. Enterprise-ready compliance out of the box.
Why MPC is the natural infrastructure for x402
The x402 protocol enables HTTP-native machine payments. MPC makes them secure, governed and enterprise-ready.
Multi-Cloud Security
No hot wallet risk
x402 demands automated signing, but a single private key is a liability. MPC distributes key shards across AWS, GCP and Azure so payments happen instantly — without any single cloud holding a complete key.
Policy-Controlled
Governed agent spending
Each AI agent gets its own MPC wallet with configurable policies: daily limits, per-transaction caps, whitelisted services. Spend freely within bounds, escalate beyond them.
Facilitator Layer
x402 payment relay
Paratro acts as the facilitator between x402 clients and blockchain settlement. Intercept 402 responses, execute MPC-signed payments, verify proofs and relay receipts — all in one round-trip.
Enterprise Audit
Every cent accounted for
Micropayments at machine scale need machine-scale auditability. Every x402 transaction carries full provenance: agent identity, policy evaluation, signing parties and settlement hash.
From 402 response to settled payment in milliseconds
Paratro handles the entire x402 payment flow — from HTTP interception to MPC signing to on-chain settlement.
Service returns HTTP 402
An AI agent or service hits a paid API endpoint. The server responds with 402 Payment Required, including price, token and recipient details.
MPC wallet signs the payment
Paratro's facilitator intercepts the 402 response, evaluates spending policies, and triggers MPC threshold signing — no single key ever exposed.
Payment settles, access granted
The signed transaction settles on-chain, a payment proof is attached to the retry request, and the service grants access. Full audit trail recorded.
Built for the machine payment economy
From AI agent wallets to enterprise treasury — Paratro powers secure automated payments at every scale.
AI Agent Payments
Give every AI agent its own MPC-secured wallet with spending policies. Agents pay for APIs, compute and data via x402 — autonomously and securely.
Learn moreAPI Monetization
Accept x402 payments for your APIs with zero integration friction. Paratro handles verification, settlement and revenue tracking automatically.
Learn moreEnterprise Treasury
Govern all outbound payments through MPC threshold signing, multi-level approvals and real-time audit — whether human-initiated or machine-triggered.
Learn moreWhat builders ask before adopting
Is it safe to let agents spend autonomously?
Yes. MPC eliminates single-key risk, and the policy engine enforces per-agent limits, whitelists and approval escalation. Agents operate within strict bounds.
Can we use this with existing x402 services?
Yes. Paratro is a standards-compliant x402 facilitator. Any service returning HTTP 402 with proper headers works out of the box.
How does this scale for thousands of agents?
Each agent gets a dedicated MPC wallet with independent policies. The platform is designed for high-throughput micro-payment workloads at machine scale.
- MPC threshold signing — no single point of compromise
- x402 protocol compliant facilitator
- Per-agent spending policies and rate limits
- Real-time audit trail for every transaction
Frequently asked questions
Ready to power secure machine payments?
Talk to our team about integrating MPC-secured x402 payments into your AI agents, APIs or enterprise treasury workflows.