# LLM & AI Agent Usage Policy

This service allows autonomous AI agents and developer workflows to consume its public validation APIs.

## Allowed for AI / LLM / Agents

- API documentation: https://validatethis.org/developers
- Pricing & Packages: https://validatethis.org/pricing
- Full capability discovery: GET https://validatethis.org/api/v1/status (returns all 33 tools, endpoints, token rates, and limits)
- Tool sections: /tools (trust & scam checks), /validators (data & format validators), /seo (technical SEO tools), /security (security & developer tools), /ai (AI visibility / AEO tools), /api (API & webhook tools)
- Trust & scam checks: https://validatethis.org/tools/website-checker (URL patterns plus live HTTP status/redirects), https://validatethis.org/tools/email-validator (email syntax, disposable risk, live MX probe), https://validatethis.org/security/ssl-checker (issuer, expiry, SAN vs hostname, chain), https://validatethis.org/tools/phone-checker (phone syntax, country prefix, toll-free/premium risk), https://validatethis.org/tools/company-checker (legal suffixes, US EIN / UK CRN / EU VAT checks)
- All checks run without mandatory registration on the free tier and return structured JSON with deterministic errors (line/column) and signals.

## API & Token-Based Rate Limits

- Discovery: GET https://validatethis.org/api/v1/status
- Execute: POST /api/v1/validate/<tool>, POST /api/v1/check/*, POST /api/v1/test/*

### Token Plans:
1. Free Tier (Guest / No Registration):
   - 100 API Tokens per day per public IP (1 token = 1 validation request).
   - Direct access with no API key or sign-up needed.
   - Throttled with HTTP 429 once the 100 tokens/day limit is reached.
2. Pro Developer Tier ($9/mo):
   - 50,000 API Tokens per month.
   - API Key auth (header `Authorization: Bearer vt_...` or `X-API-Key: vt_...`), up to 3 keys, usage analytics dashboard.
3. Scale / Business Tier ($49/mo):
   - 500,000 API Tokens per month.
   - High-throughput capacity for CI/CD pipelines, production microservices, and autonomous multi-agent systems.

### Response Headers:
- `X-RateLimit-Limit`: Total token allocation for the current period.
- `X-RateLimit-Remaining`: Remaining tokens available.
- `X-RateLimit-Reset`: ISO 8601 UTC timestamp when token balance resets.
- `X-RateLimit-Plan`: Current tier (`free`, `pro`, `team`).
- `X-RateLimit-Tokens-Consumed`: Tokens deducted for the request (standard: 1).