The agent successfully assembled a comprehensive overview of grep.app by working around the site's direct access restrictions (Vercel security checkpoint). It retrieved key information from Vercel's official changelog and acquisition announcement, supplemented with third-party documentation (Bellingcat toolkit), and synthesized findings from web search results to answer what grep.app does, who it's for, its pricing model, and how it differs from alternatives. The site itself was largely inaccessible via direct fetch, forcing heavy reliance on external sources and prior knowledge.

• ›Steps [14] and [15] returned Vercel's official marketing content (changelog and acquisition blog) that confirmed grep.app is a free GitHub code search engine owned by Vercel, supports regex, indexes 500,000+ repos, and integrates via MCP—core facts cited in the final response.
• ›Step [5] (Bellingcat GitBook entry) provided independent third-party documentation that likely contained practical use cases and positioning, though the full content was truncated in the response.
• ›The grep.app domain itself returned 429 security checkpoint errors on direct access attempts ([1], [20]), making the site fundamentally inaccessible to the agent; all substantive content came from off-domain sources (Vercel blog, GitBook, SaaSHub alternatives page).
• ›The agent could not access grep.app's own terms of service, pricing page, or API documentation despite attempting to fetch /terms; specific details like exact rate limits, data freshness, and API tiers remain undocumented in the final answer.
• ›The site does not publish machine-readable structured data (pricing, features, terms) in a form accessible to agents; the agent had to assemble the answer from Vercel's product pages and third-party comparison sites rather than from grep.app's native resources.