C# and .NET SDK

# The authorize request is a page the person opens, not an API call. Build the address on your
# server: a fresh PKCE pair, state and nonce for this browser, then redirect them to it.
VERIFIER=$(openssl rand -base64 32 | tr '+/' '-_' | tr -d '=\n')
CHALLENGE=$(printf '%s' "$VERIFIER" | openssl dgst -sha256 -binary | openssl base64 | tr '+/' '-_' | tr -d '=\n')
STATE=$(openssl rand -hex 16)
echo "https://accounts.aton-network.org/oauth/authorize?response_type=code&client_id=$ATHERON_CLIENT_ID&redirect_uri=https%3A%2F%2Fapp.example.com%2Fcallback&scope=openid%20profile%20email&state=$STATE&code_challenge=$CHALLENGE&code_challenge_method=S256"

# Swap the code from the redirect for tokens, on your server. HTTP Basic carries your client ID and
# secret; the verifier proves this is the browser that started the sign-in.
curl https://accounts.aton-network.org/oauth/token \
  -u "$ATHERON_CLIENT_ID:$ATHERON_CLIENT_SECRET" \
  -d grant_type=authorization_code \
  -d code="$CODE" \
  -d redirect_uri=https://app.example.com/callback \
  -d code_verifier="$VERIFIER"

# Who the person is as of now, with an access token issued to your client.
curl https://accounts.aton-network.org/oauth/userinfo \
  -H "Authorization: Bearer $ACCESS_TOKEN"

# A new access token and a new refresh token for the newest refresh token you hold. The old one stops working.
curl https://accounts.aton-network.org/oauth/token \
  -u "$ATHERON_CLIENT_ID:$ATHERON_CLIENT_SECRET" \
  -d grant_type=refresh_token \
  -d refresh_token="$REFRESH_TOKEN"

// Check that a webhook came from Atheron before you act on it. Pass the raw body, exactly as received.
import { verifyWebhook, type WebhookEvent } from "@aton-network/sdk";

export async function handleWebhook(request: Request): Promise<Response> {
  const raw = await request.text();
  const ok = await verifyWebhook(request.headers.get("atheron-signature"), raw, process.env.ATHERON_WEBHOOK_SECRET!);
  if (!ok) return new Response("bad signature", { status: 400 });
  const event = JSON.parse(raw) as WebhookEvent;
  if (event.type === "consent.revoked") {
    // Delete the refresh token you hold for event.data.sub, and stop using what you read.
  }
  return new Response(null, { status: 204 });
}

# Follow the events stream. -N keeps curl from buffering; pass the last id you handled to resume.
curl -N https://developers.aton-network.org/api/v1/events \
  -H "Authorization: Bearer $ATHERON_API_KEY" \
  -H "Accept: text/event-stream" \
  -H "Last-Event-ID: $LAST_EVENT_ID"

// Your app and its usage in one GraphQL request, then its events as they happen over the subscription.
// Node 22 has a global WebSocket; on Node 20, pass { WebSocket } from the ws package.
import { AtheronGraphQL, UsageQuery } from "@aton-network/sdk";

export async function usageThisMonth(apiKey: string): Promise<number> {
  const { usage } = await new AtheronGraphQL({ apiKey }).query(UsageQuery, { days: 30 });
  return usage ? usage.usage.reduce((sum, day) => sum + day.calls, 0) : 0;
}

export async function watchConsent(apiKey: string, lastId: string | null, forget: (sub: string | undefined) => void, signal?: AbortSignal): Promise<string | null> {
  for await (const event of new AtheronGraphQL({ apiKey }).events({ types: ["consent.revoked"], lastEventId: lastId, ...(signal ? { signal } : {}) })) {
    forget(event.data.sub);
    lastId = event.id; // keep it somewhere durable, to pass back after a restart
  }
  return lastId;
}

# Your app as registered, for the environment this API key belongs to. Needs app:read.
curl https://developers.aton-network.org/api/v1/app \
  -H "Authorization: Bearer $ATHERON_API_KEY"