Arachne checks machine-readable signals, then tests whether a bounded agent can actually understand your offer, find the right path, and stop before unsafe actions.
Enter a public website URL once. Arachne checks machine-readable signals, then automatically tests a bounded agent task and builds one combined result.
No signup. No card. Just the score.
By submitting a URL, you agree that Arachne may scan publicly accessible pages and signals to generate an Agent Readiness result. Arachne does not log in, bypass access controls, or perform write actions without authorization. See our Privacy Policy.
Arachne compiles your site into a Shadow API — a native MCP server, an OpenAPI surface, and an agent policy — without you touching your codebase. Preview the exact Shadow API we'd build for you, right now.
We'll verify your domain and get your Shadow API live. No charge until your build is scheduled.
The questions buyers ask most often before clicking unlock.
Agents and scrapers can already read public pages. Arachne turns that invisible traffic into a governed, logged interface.
Publishing a Shadow API does not grant blanket write access. Reads are structured, writes default to draft_only, high-risk actions require approval, and page content is treated as data rather than instructions. Every call lands in a tamper-evident ledger.
The trade is unmanaged scraping versus accountable access.
Deterministic, 7 weighted signals, max 100. Each is binary — full weight or zero. The weights sum to 100.
| Signal | Weight |
|---|---|
| MCP server endpoint | 35 |
| OpenAPI spec at root | 25 |
| llms.txt | 15 |
| sitemap.xml | 10 |
| robots.txt | 5 |
| JSON-LD on homepage | 5 |
| Semantic forms | 5 |
Grade: A (90+) · B (75+) · C (60+) · D (40+) · F (<40)
The $99 Implementation Pack breaks down exactly which signal you missed, why it matters, and your projected score after Arachne compiles a Shadow API.
Instant redirect to your Implementation Pack — every readiness signal scored with the specific detail, a prioritized fix list, and your projected score after Arachne. Plus a live preview of the Shadow API we'd compile for your domain (real manifest, real tools), and the option to commission a hosted build.
No. One-time, per domain. You only enter subscription territory if you commission a hosted Shadow API ($500 setup + $99/mo), and that's an explicit separate decision on the next page.
The Shadow API works with any MCP-capable agent. Most common: Claude Desktop, plus Claude Code, Cursor, Continue, and custom agents built with LangChain MCP adapters or the OpenAI Agents SDK. One URL, every client.
No. Arachne is fully egress-side — we only see what a normal browser sees on your public site. Domain ownership is proven via a single DNS TXT record. We never touch your code, your database, or your auth system.
More questions? See the full Arachne FAQ or email [email protected].