Onto addresses the challenge of making website content accessible and understandable to AI agents by transforming complex web pages into clean, structured Markdown and providing an AIO (AI Optimization) score that reflects content readiness for AI consumption. The platform targets both AI developers building agents and site owners or engineering teams who want their sites to be accurately interpreted by AI crawlers without compromising the human browsing experience.
The tool offers a REST API and an official Model Context Protocol (MCP) server that convert web HTML into agent-ready Markdown, delivering sub-100ms cache hits. Onto’s Read API extracts the core semantic content from any URL, stripping away layout code, scripts, and extraneous elements to yield a concise Markdown payload. In addition to content cleaning, Onto provides an AIO score, which grades the site’s readiness for AI agents, and flags hallucination risks. The platform also supports batch processing of URLs, site mapping to discover URLs, and data extraction for JSON-LD, Open Graph, and meta tags, all accessible through the MCP server for integration with tools like Claude Code, Cursor, Cline, Zed, and Continue.
js SDK and edge middleware that can be installed with a single line, ensuring that AI crawlers receive clean Markdown while human visitors experience the original site. This approach enables significant reductions in payload size—up to 99%—and helps prevent AI hallucinations or misattributions by providing accurate, cited, and token-efficient content context. The Serve layer is designed for seamless integration into existing web stacks, regardless of framework or hosting provider.
A forthcoming "Act" layer is planned to enable autonomous agents to interact with websites through semantic intent rather than brittle CSS selectors, with site owners opting in. Onto positions itself as a comprehensive compatibility layer for the agent web, combining content cleaning, scoring, and interaction capabilities under a unified engine. The platform offers a free AIO Scanner that allows users to drop any URL and receive a readiness score within seconds. Onto’s infrastructure is built for extensibility, aiming to support the evolving needs of AI agents and the broader agent web ecosystem.
Onto is an Infrastructure & Backend product. It focuses on enabling AI agents and developers to access clean, structured website content for improved AI compatibility and analysis. It is built as a B2B product for AI developers and site owners. Onto follows a freemium model, with paid plans starting at $19. It runs on the command line and API.
Onto first shipped in 2026. PulseGate's similarity index finds few close equivalents — Onto occupies a relatively distinct niche. Key capabilities include markdown conversion, AIO scoring, and API access. It exposes integrations via an MCP server and a public API.
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