Agent-Readiness Grade / Compare
Free agent-readiness checkers, compared
One page per tool: what it checks, whether it needs a signup or a card, what the free tool costs, and what Agent-Readiness Grade adds. Facts read from each vendor's public pages on 2026-09-29.
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.
| Vendor | Tool | Signup or card | Price |
|---|---|---|---|
| Otterly | AI Crawlability Check | No signup for Otterly's free GEO tools. | Free. |
| Writesonic | AI Crawlability Checker | No login. | Free. |
| AmICited | free tools (agent accessibility score) | Login required; a card is required for the trial. | The free tools sit behind a login and the trial needs a card. |
| AmIOnAI | AI visibility checker | An email address is required. | Free once you give an email address. |
| Goodie | Agent Readiness Audit | No signup and unlimited scans; an email address is required only to receive the report. | Free; the upsell is a product demo. |
| Frase | Agent Readiness Checker | No signup for the score; the full assembled report is inside a Frase trial. | Free; paid plans start at $39 per month billed yearly. |
What Agent-Readiness Grade adds in every comparison
- 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