Detect invoice assignment conflicts API

Flag when the same invoice id or number is assigned to more than one assignee in the supplied set.

The Detect invoice assignment conflicts operation is part of the Trade Finance & Receivables Intelligence API on BRAINIAC.software. Flag when the same invoice id or number is assigned to more than one assignee in the supplied set. It is exposed as POST /api/v1/trade-finance/invoice-assignment-conflict-detect and priced at $0.04 USDC on Base. Payment uses the x402 exact scheme: an unpaid call returns HTTP 402 with payment requirements; after paying the exact USDC amount, retry the same request with a payment-signature header and Idempotency-Key. No account and no API key are required. Data sources for this product: Caller-supplied invoices, contracts, letters of credit, and trade documents World Bank Open Data (no API key) when requested Limitations: No paid trade-finance data provider is used and no API key is required. Missing amounts, parties, and due dates are not invented. Financing readiness and discounting are descriptive only. A credit or financing decision is never produced. Discrepancy checks compare supplied fields only and do not contact banks or registries. World Bank responses are contextual only when country and indicator codes are supplied. Outputs are compliance prechecks, drafts, or data lookups for human review. They are not official determinations, legal advice, identity confirmation, or certified filings. Related operations in this group include Match trade finance documents, Detect letter of credit discrepancies, Assess invoice financing readiness, Analyze receivable aging risk. Open the group documentation for the full request schema, field notes, and response examples before integrating.