Headerline Review
Arex is an editorial site that evaluates website data APIs, focusing on how teams can obtain reliable, machine-readable facts about domains without building their own crawlers. It provides practical guidance on per-call pricing, API integration, and the meaning of specific checks like AI readiness and email authentication, using BusinessMCP's website checks API as a concrete example.
- Developer Tools
- Data & Analytics
- Artificial Intelligence
- Marketing Technology
- Software Only
Funding
Funding not disclosed
Founders
Founder details are not available yet.
Product
Problem
Teams that audit websites for AI visibility, email deliverability, and machine readability often rely on manual tools that work for one domain at a time or on scraping APIs that return raw HTML requiring custom parsing. This makes it difficult to run consistent, repeatable checks across many domains and to integrate those checks into automated workflows.
Solution
BusinessMCP provides a website data API that takes a domain and returns structured verdicts on narrow, checkable questions. The API performs the fetching, DNS lookups, and interpretation on the vendor's side, returning results code can store, diff, and alert on. Each of the four per-domain endpoints—AI readiness grade, AI crawler access, WebMCP detection, and email authentication—is exposed as both a REST route and an MCP tool under a single bearer token. The service is prepaid per call with no subscription, and unreadable sites are refunded rather than graded.
Target Audience
Primary users are developers, agencies, SEO and deliverability engineers who audit many domains and need programmatic, repeatable checks integrated into scripts, CI jobs, or AI agent workflows.
Features
- AI readiness grade endpoint scoring a site's readability to AI agents and answer engines on a 0-100 scale at $0.03 per call
- AI crawler access check reporting which crawlers (GPTBot, ClaudeBot, PerplexityBot) robots.txt allows at $0.01 per call
- WebMCP detection check for in-page tools exposed to browser agents at $0.01 per call
- Email authentication check covering MX, SPF, DMARC, and DKIM records, graded with fixes for failures at $0.01 per call
- Return of "unknown" as a third state for unreadable robots.txt or incomplete DNS lookups rather than guessing allowed or failed
- Each endpoint available as both a REST route of the form `GET /api/hub/v1/sites/{domain}/...` and an MCP tool with the same name, input, and price