Open Source

Python SDK

Python 3.8+·License MIT

Sync and async clients, compliance checks, safe-regeneration, policy engine, multi-turn sessions, middleware, agent evaluation (v2.4), and full OpenTelemetry observability. Provider extras for OpenAI, Anthropic, Google Generative AI, and LiteLLM.

from rail_score import RailScore

client = RailScore(api_key=RAIL_API_KEY)
result = client.eval(
    content="Our AI system prioritizes user privacy and data security.",
    mode="deep",
)
print(result.scores)

JavaScript / TypeScript SDK

TypeScript 5.2, Node 16+·License MIT

Type-safe API coverage for eval, safe-regenerate (server + external mode), compliance, and health. Built-in provider wrappers (OpenAI, Anthropic, Google). Policy engine, session tracking, Langfuse integration, OTEL telemetry. Agent evaluation in v2.4.

import { RailScore } from "@responsible-ai-labs/rail-score";

const client = new RailScore({ apiKey: process.env.RAIL_API_KEY! });
const result = await client.eval({
  content: "Our AI system prioritizes user privacy and data security.",
});
console.log(result.scores);