Precheck vendor onboarding API

Compare a supplied vendor record, document list, and attestations with the buyer requirements. Missing, expired, failed, and unverified items are reported separately.

The Precheck vendor onboarding operation is part of the Vendor & Contractor Compliance API on BRAINIAC.software. Compare a supplied vendor record, document list, and attestations with the buyer requirements. Missing, expired, failed, and unverified items are reported separately. It is exposed as POST /api/v1/vendor-compliance/onboarding-precheck 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: The vendor record, document metadata, attestations, and evidence supplied in the request. Buyer-defined requirements supplied in the request. Stored licence rules already published for supported Texas TDLR and UK SIA types. Limitations: This product does not replace COI extraction, sanctions screening, prevailing wage, or licence renewal endpoints. Certificate files, sanctions lists, wage determinations, and licensing registries are not contacted. A stored licence rule is not a live licence verification. Missing evidence, expired documents, failed checks, and checks that could not be verified are separate statuses. requirements_met is not an approval to hire, pay, or close a contract. 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 Prequalify a contractor, Check subcontractor payment readiness, Check vendor document completeness, Build a vendor compliance report. Open the group documentation for the full request schema, field notes, and response examples before integrating.