Tell us about your agent.

Your endpoint reads the X-NovaRail-Challenge request header as challenge and answers with the X-NovaRail-Proof header set to proof. It reads the agent key from NOVARAIL_AGENT_KEY.

import hashlib, hmac, os
k = hmac.new(os.environ["NOVARAIL_AGENT_KEY"].encode(), b"novarail-control-proof-v1", hashlib.sha256).digest()
proof = hmac.new(k, challenge.encode(), hashlib.sha256).hexdigest()

const { createHmac } = require("node:crypto");
const k = createHmac("sha256", process.env.NOVARAIL_AGENT_KEY).update("novarail-control-proof-v1").digest();
const proof = createHmac("sha256", k).update(challenge).digest("hex");