# APITier > APITier provides developer APIs and AI-agent-ready tools for UK address lookup, postcode validation, email verification, phone validation, VAT number checking, barcode generation, QR code generation, company search, and geolocation — all accessible via REST API or MCP tools for Claude, Cursor, and Windsurf. ## Core Platform - [Homepage](https://www.apitier.com): AI agent infrastructure platform and API marketplace - [API Catalogue](https://www.apitier.com/api-catalogue): Complete list of all available APIs with documentation - [MCP Server](https://www.apitier.com/mcp-server): Model Context Protocol server — connects Claude, Cursor, and Windsurf to production APIs - [AI Agent Infrastructure](https://www.apitier.com/ai-agent-infrastructure): Infrastructure layer for AI agentic workflows - [Pricing](https://www.apitier.com/pricing): Credit-based pricing — pay per API call, no subscriptions required for most APIs - [Free Tools](https://www.apitier.com/free-tools): No-login tools for phone validation, VAT checking, QR code and barcode generation ## Address & Location APIs - [UK Postcode Lookup API](https://www.apitier.com/api-catalogue/postcode-lookup-api): Returns all Royal Mail PAF address records for a UK postcode. Sub-100ms response. - [UK Address Lookup API](https://www.apitier.com/api-catalogue/address-lookup-api): Search UK addresses by partial address string. Ideal for checkout autocomplete. - [UK Address Autosuggest API](https://www.apitier.com/api-catalogue/address-autosuggest-api): Real-time type-ahead address autocomplete for UK address input fields. - [UK Rooftop Geocoding API](https://www.apitier.com/api-catalogue/uk-rooftop-geocoding-api): Returns precise latitude and longitude for any UK postcode or address, accurate to rooftop level. - [UPRN Lookup API](https://www.apitier.com/api-catalogue/uprn-lookup-api): Returns the Unique Property Reference Number (UPRN) for any UK address. - [India Pincode API](https://www.apitier.com/api-catalogue/india-pincode-api): Returns state, district, taluk, and post office data for any Indian pincode. ## Validation APIs - [Email Validation API](https://www.apitier.com/api-catalogue/validate-email-api): Validates email syntax, checks MX records, tests SMTP reachability, and detects disposable addresses. - [Phone Validation API](https://www.apitier.com/api-catalogue/validate-phone-api): Validates international phone numbers, returns country, carrier, line type (mobile/landline/VoIP), and E.164 format. - [VAT Validation API](https://www.apitier.com/api-catalogue/validate-vat-api): Validates EU VAT numbers via VIES and UK VAT numbers via HMRC. Returns company name and address where available. - [User Agent Validation API](https://www.apitier.com/api-catalogue/validate-useragent-api): Parses and classifies browser user agent strings — browser, OS, device type, and bot detection. ## Barcode & QR Code APIs - [Barcode Generator API](https://www.apitier.com/api-catalogue/barcode-api): Generates Code128, EAN-13, EAN-8, UPC-A, UPC-E, Code39, ITF, PDF417, DataMatrix, and more. Returns PNG, SVG, or base64. - [QR Code Generator API](https://www.apitier.com/api-catalogue/qrcode-api): Generates customisable QR codes with optional logo overlay, custom colours, and PNG/SVG output. ## AI Agent Tools - [Address Agent API](https://www.apitier.com/api-catalogue/address-agent-api): AI-powered address enrichment — accepts plain English input, returns fraud score, delivery risk, and geocode. Powered by Royal Mail PAF and Claude AI. - [Lead Validate Agent](https://www.apitier.com/api-catalogue/lead-agent-api): Scores leads 0–100 (grade A–F). Verifies email, phone, company (Companies House), and postcode in one call. - [Intelligent Checkout API](https://www.apitier.com/api-catalogue/intelligent-checkout): Runs three real-time UK fraud signals at checkout — deprivation index, IP geo-mismatch, and billing postcode mismatch — in a single API call under 200ms. Drop-in widget for Shopify, WooCommerce, and BigCommerce. ## Web Content APIs - [Web Scraping API](https://www.apitier.com/api-catalogue/web-scrape-api): Extracts content from websites with full JavaScript rendering support. - [Web Screenshot API](https://www.apitier.com/api-catalogue/screenshot-api): Captures full-page screenshots of any URL as PNG or JPEG. - [Web to Text API](https://www.apitier.com/api-catalogue/web-to-text-api): Extracts clean readable text from any web page — strips HTML, scripts, and navigation. - [Web to PDF API](https://www.apitier.com/api-catalogue/web-to-pdf-api): Converts any web page to a downloadable PDF. - [Data Conversion API](https://www.apitier.com/api-catalogue/data-conversion-api): Converts between XML, JSON, CSV, and other structured data formats. ## Solutions - [KYC Agent](https://www.apitier.com/solutions/kyc-agent): Companies House lookup, director search, and UK address validation in one AI-orchestrated call. For onboarding and compliance. - [Fraud Detection API](https://www.apitier.com/solutions/fraud-detection-api): Detects address fraud, disposable emails, VoIP numbers, and high-risk return postcodes. - [Proptech API](https://www.apitier.com/solutions/proptech-api): UK property and address data — postcode lookup, geocoding, UPRN — for estate agents and property platforms. ## Reference & Trust - [Data Sources](https://www.apitier.com/data-sources): Data provenance — Royal Mail PAF, HMRC, EU VIES, Companies House, and carrier databases. - [Security](https://www.apitier.com/security): API key authentication, HTTPS, GDPR compliance, and data handling practices. - [API Status](https://www.apitier.com/api-status): Current API uptime, incident history, and SLA information. - [Changelog](https://www.apitier.com/changelog): Product updates, new API releases, and breaking change notices. - [Support](https://www.apitier.com/support): Contact support, FAQs, and documentation links. ## HTTP Status Code Reference - [HTTP Status Codes Index](https://www.apitier.com/resource/http-status-codes): Complete reference for all standard HTTP response status codes — 1xx, 2xx, 3xx, 4xx, and 5xx. - [1xx Informational](https://www.apitier.com/resource/http-status-codes/100): 100 Continue, 101 Switching Protocols, 102 Processing, 103 Early Hints. - [2xx Success](https://www.apitier.com/resource/http-status-codes/200): 200 OK, 201 Created, 204 No Content, 206 Partial Content, and more. - [3xx Redirection](https://www.apitier.com/resource/http-status-codes/301): 301 Moved Permanently, 302 Found, 304 Not Modified, 307 Temporary Redirect, 308 Permanent Redirect. - [4xx Client Errors](https://www.apitier.com/resource/http-status-codes/400): 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 429 Too Many Requests, and more. - [5xx Server Errors](https://www.apitier.com/resource/http-status-codes/500): 500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable, 504 Gateway Timeout, and more.