Agent-Readiness Grade / Compare / Writesonic

Writesonic's AI Crawlability Checker and Agent-Readiness Grade

Tool compared: https://writesonic.com/free-tools/ai-crawl-checker. The facts about Writesonic were read from its public pages on 2026-09-29; features and prices change, so check the linked page.

What it checks	Signup or card required	Price of the free tool	What Agent-Readiness Grade adds
Words and links readable in the raw HTML (without JavaScript) and the robots.txt rules for about 16 named bots.	No login.	Free.	Payment and agent surfaces: /.well-known/x402, /.well-known/agent-card.json, /.well-known/mcp-registry-auth and /openapi.json, each fetched and validated (catch-all HTML pages do not count) Legal notices: the six required notices and request mechanisms, via the TAKE IT DOWN desk check MCP census entry: whether the host is listed among sites selling to agents in the agent-economy index, and whether /mcp answers A letter grade (A-F, 0-12, shown as a percentage too) with evidence lines and one fix per area, plus the top three fixes ordered by points recoverable A permanent public profile at /site/<host> with grade history and an embeddable SVG badge No email at any step; JSON API with CORS

What it checks

Signup or card required

Price of the free tool

What Agent-Readiness Grade adds

Words and links readable in the raw HTML (without JavaScript) and the robots.txt rules for about 16 named bots.

No login.

Free.

Payment and agent surfaces: /.well-known/x402, /.well-known/agent-card.json, /.well-known/mcp-registry-auth and /openapi.json, each fetched and validated (catch-all HTML pages do not count)
Legal notices: the six required notices and request mechanisms, via the TAKE IT DOWN desk check
MCP census entry: whether the host is listed among sites selling to agents in the agent-economy index, and whether /mcp answers
A letter grade (A-F, 0-12, shown as a percentage too) with evidence lines and one fix per area, plus the top three fixes ordered by points recoverable
A permanent public profile at /site/<host> with grade history and an embeddable SVG badge
No email at any step; JSON API with CORS

Where the two overlap

Both read robots.txt and the raw HTML of a public site without a browser, and both are free to run. Writesonic's tool is the right choice for the checks in its first column; Agent-Readiness Grade is the one to run when you also sell to agents, need the legal notices checked, or want a permanent, linkable record.

Free agent-readiness checkers are a crowded category: Goodie, Frase, aiwebreadiness.com, Arobis, Rank Prompt, Otterly and Writesonic each offer one. Of the checkers we looked at, Agent-Readiness Grade is the only one we found that grades payment and agent-checkout surfaces (/.well-known/x402, agent-card.json, mcp-registry-auth, openapi.json, the MCP endpoint) and legal notices. Statement dated 2026-09-29.

Other comparisons

Otterly · AmICited · AmIOnAI · Goodie · Frase