Simple, transparent pricing

Start free, then scale guardrails and explainability as your AI usage grows.

Free

0 USD β€” explore basic RAIL scoring

$0/ forever
  • Access to basic RAIL score endpoints
  • 30 calls/day to simple endpoints
  • Up to 5 checks/day on advanced endpoints
  • Email support
Contact Sales

Pro

Best for individuals & small AI teams

$29/ mo
  • All Free features
  • Increased daily quotas across endpoints
  • Custom weights & explainable scoring
  • Priority email support
  • Access to Re-Prompt
Contact Sales

Business

For AI-heavy products & compliance needs

$249/ mo
  • Everything in Pro
  • Higher/negotiable daily quotas (1000+)
  • Protected Generation & policy guardrails
  • Team management & audit-ready logs
  • Dedicated success manager
  • 24/7 support & SLAs

It’s never been this easy πŸš€

cURL

curl --location 'https://api-693516574005.us-central1.run.app/v1/rail/score/basic' \
  --header 'Content-Type: application/json' \
  --header 'RAIL-API-KEY: YOUR_API_KEY' \
  --data '{ "content": "Any LLM output you want to evaluate." }'

Next.js / Node (fetch)

const BASE_URL = "https://api-693516574005.us-central1.run.app";

export async function railScoreBasic(content) {
  const res = await fetch(`${BASE_URL}/v1/rail/score/basic`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "RAIL-API-KEY": process.env.RAIL_API_KEY || "YOUR_API_KEY"
    },
    body: JSON.stringify({ content }),
    cache: "no-store"
  });
  if (!res.ok) throw new Error(`RAIL error ${res.status}`);
  return res.json();
}

Need help choosing a plan? Email api-support@responsibleailabs.ai.