HALOWERK x402 Payment Policy Checker

Use this endpoint when an AI agent needs to autonomously make x402 micropayments and requires a pre-flight policy gate to enforce spending controls, asset whitelisting, chain restrictions, or recipient filtering before committing a payment. It is especially valuable for agentic workflows where the agent has a budget ceiling and must avoid overspending across calls. Prefer this over manual limit-checking logic when you need a stateless, structured policy evaluation that accounts for accumulated hourly and daily spend.

• Payment amount exceeds max_per_call threshold — returns policy violation with the exceeded limit
• Hourly spend plus proposed amount exceeds max_per_hour — returns budget exceeded error
• Daily spend cap reached — returns daily limit exhausted response
• Recipient address is in blocked_recipients list — returns recipient blocked error
• Proposed asset token address not in allowed_assets — returns asset not permitted error
• Chain not in allowed_chains — returns chain not permitted error
• Missing required amount_units in proposed_payment — returns schema validation error
• Malformed numeric strings in policy fields — returns pattern validation error