Most validation APIs hide failure modes behind vague binary flags. LookTwice provides deterministic verification, pinned regulatory standards, and tamper-evident audit logs that developers and autonomous agents can rely on.
Four rules govern every API endpoint, data pipeline, and status boundary we ship.
We never use probabilistic models or fuzzy heuristics to validate bank checksums or tax IDs. Every check executes strict mathematical specifications, including ISO 7064 MOD-97-10 arithmetic, SWIFT IBAN Registry Release 102 (102 countries), and real-time EU VIES SOAP registries.
When a government tax authority drops for weekend maintenance, naive billing software returns “invalid VAT” and drops enterprise checkouts. LookTwice returns HTTP 503 and charges exactly 0 credits. You never pay for an upstream failure.
Every response carries cryptographic proof: the exact source, UTC query timestamp, content hash, and execution duration. If an auditor asks why an order was approved or a recall match was flagged, the evidence is already in your log.
We report signals, not legal certainty. An IBAN check confirms mathematical and structural validity, not bank account ownership. A clean recall check means no match was found in scoped federal feeds. We never sell false confidence.
As software shifts from human-operated dashboards to autonomous AI agents, deterministic tooling is no longer optional. LookTwice serves as the mission-critical guardrail layer connecting LLM reasoning with real-world financial, product safety, and identity facts.
Official packages available for Model Context Protocol (MCP) agents, n8n visual workflows, Node.js, and Python SDKs.
Self-hosted and cloud-edge deployments across North America and Europe, delivering sub-50ms deterministic validation latencies.
No high-pressure sales reps. Technical questions are answered directly by engineers who maintain the validation engines.