APITier

APITier is an AI agent infrastructure platform that connects agents such as Claude, Cursor, Windsurf, and custom-built ones to production APIs through the Model Context Protocol. It supplies agents with real data and actions by providing a unified account and MCP key for tools including address validation, lead intelligence, business verification, and fraud detection.

The Address Agent validates and enriches addresses across 120 countries in a single call. UK addresses route automatically to Royal Mail PAF for building-level confirmation while international addresses use OpenStreetMap data. Every response returns geocoding with latitude and longitude, a confidence score rated high medium or low, a canonical address, and fraud signals that cover IP geo-mismatch, disposable email detection, invalid phone flags, and delivery risk. The same JSON schema applies everywhere without any country parameter required.

The Lead Agent performs validation of email, phone, company, and postcode in one API call then applies an AI layer to produce a quality score from 0 to 100 with an A to F grade plus a plain-English risk summary. Business verification checks Companies House records for active or dissolved status, registered address, VAT, and risk score. Director search returns appointment history, dissolved company exposure, address clusters, and risk flags for UK directors. All three agents operate under a single key with average response times below 200 milliseconds.

The service runs as a web-based API platform. It offers a free tier that includes trial requests with no credit card required. The platform reports 99.9 percent uptime SLA and more than 26,000 active subscriptions. Developers and teams building AI-first applications use it to equip agents with production tools for automated verification and intelligence.