Back to Discover

Lumière PayCheck

Startup Launched Recently

Visit Website

Share: X LinkedIn Reddit

Machine translation — the English original is authoritative.

The Story

AI agents are starting to pay for APIs on their own with x402. But an endpoint can be down, return the wrong data, quietly raise its price, or switch its payout wallet, and the agent only finds out after the money is gone.

Lumière PayCheck is a trust layer that answers before the agent pays. It continuously monitors tens of thousands of x402 endpoints on Base and Solana and makes real test payments to confirm they deliver what they promise. It also screens payout wallets against the U.S. Treasury sanctions list. Ask about any endpoint and you get a proceed, caution or avoid verdict.

Use it free through the API, the MCP server (works in Claude, Cursor and other AI tools), or the x402-paycheck SDK. Teams can add per-agent spending limits, human review for unusual payments, and signed receipts with an audit trail. Facilitators can screen payments before they settle.

AI Overview

AI-generated

Autonomous API payments introduce a vulnerability: endpoints can fail, return incorrect data, quietly raise prices, or redirect funds to compromised wallets—with agents discovering problems only after transactions settle. Lumière PayCheck addresses this gap by serving as a verification layer that validates x402 endpoints before payment occurs, ensuring agents access services that deliver as promised.

The platform monitors roughly 64,000 x402 endpoints across blockchain networks and executes real test payments to confirm endpoint integrity. This active verification approach—checking actual performance rather than relying on passive monitoring—distinguishes the product. Each endpoint receives classification as proceed, caution, or avoid, giving agent builders immediate risk assessment for payment decisions.

Integration flexibility removes adoption barriers. The service reaches developers through a free REST API, MCP server compatibility (integrated with Claude and Cursor), or the x402-paycheck npm package. The free tier serves individual developers without payment requirements, while API keys enable higher rate limits for scaling.

For teams, Lumière PayCheck adds governance and compliance layers. Features span per-agent spending caps, manual review workflows for unusual payments, signed receipts with full audit trails, and sanctions screening of payout wallet addresses. These additions position the product for finance and compliance operations, not solely development teams.

Current monitoring data shows approximately 57,900 endpoints passing validation from a tracked base of 64,000, suggesting substantial adoption within the x402 ecosystem.

Team pricing starts at $200 monthly plus $750 setup, with bundled agent features at $500 monthly plus $2,000 setup. This cost structure targets organizations automating invoicing, quote follow-ups, missed-call management, insurance verification, and receipt tracking.

Founder Diary

Devlog

The maker hasn't posted a diary entry yet.

Key Features

API Endpoint Verification

Validates x402 endpoints before payment to ensure service reliability

Active Monitoring

Tests 64,000 x402 endpoints with real test payments to confirm integrity

Risk Classification

Rates endpoints as proceed, caution, or avoid for immediate assessment

Multi-Channel Integration

Accessible via REST API, MCP server (Claude/Cursor), and npm package

Compliance Features

Includes spending caps, manual review, audit trails, and sanctions screening

Use Cases

1

Agent Developers

Verify payment endpoint reliability before service integration
2

Finance Teams

Manage governance, compliance, and audit requirements for automated payments
3

Enterprise Automation

Automate invoicing, quote follow-ups, insurance verification, and receipt tracking