Transparent Token-Based Pricing
Predictable API Limits for Developers & Agents
Start with free daily tokens without creating an account. Upgrade to Pro or Scale when you need higher automated throughput.
No Registration
Free
$0/ forever
100 tokens / day
Instant access for testing, quick manual checks, and lightweight scripts.
- 100 API Tokens per day (1 request = 1 token)
- No sign-up or API key required (IP-tracked)
- Access to all 33 validation tools
- Standard rate limiting headers included
- Deterministic JSON output with line/column errors
Most Popular
Pro Developer
$9/ per month
50,000 tokens / month
For active developers, indie builders, and growing applications.
- 50,000 API Tokens per month
- Personal API Keys (up to 3 keys with vt_ prefix)
- Ad-free online workspace and tools
- Usage analytics and consumption dashboard
- Increased input body limits (up to 50 KB)
- Priority API response routing
High Volume
Scale / Business
$49/ per month
500,000 tokens / month
Built for CI/CD pipelines, production backends, and autonomous AI agents.
- 500,000 API Tokens per month
- Up to 5 API Keys for team & staging environments
- Dedicated high-throughput rate limit allocation
- Webhooks & schema automation support
- Full access to trust heuristics & live probes
- Priority developer email support
How Token Consumption Works
Every API call deducts 1 tokenfrom your quota for standard payloads (< 25 KB). Responses include standard rate-limit headers:
X-RateLimit-Limit: Total token pool
X-RateLimit-Remaining: Tokens left in window
X-RateLimit-Reset: UTC timestamp of next reset
X-RateLimit-Plan: Current tier (free, pro, team)
Need automated integration guides? Read our Developer API Documentation or machine-readable discovery endpoint at /api/v1/status.