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This recipe is for partners calling the AGG API from their own backend (Node, Go, Python, anywhere that isn’t the end-user’s browser). Browser-based integrations do not need an API key — they’re authenticated by their allowed origins and the end-user’s session token.
An API key is a secret. Never embed it in browser bundles, source maps, public repositories, or logs. Treat it like a database password.

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When You Need One

Send x-app-api-key from your backend when:
  • You call any AGG endpoint from server code (no Origin header, no user session).
  • You want per-key rate-limit quota instead of the shared browser-IP quota.
  • You’ve enabled requireApiKey on your app.
The header is always accepted but never required by default — turning on requireApiKey is how you make it mandatory for your app.

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Creating a Key

Open the admin dashboard, select the target app, and go to Credentials → API Keys → Create new key. Pick a scope:
ScopeCan do
readRead-only access to your app’s public endpoints.
read_writeRead + partner-admin write operations on your app (members, settings, etc., excluding security).
The key value is shown once in the creation dialog. Copy it immediately and store it in your secret manager — AGG only stores a SHA-256 hash and cannot display the raw value again. Keys have the format agg_<appId>_<64 hex>. The appId is embedded so the key is bound to a specific app; using it against a different app’s x-app-id is rejected with 403.

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Sending It

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From @agg-build/sdk

import { createAggClient } from "@agg-build/sdk";

const client = createAggClient({
  baseUrl: "https://api.agg.market",
  appId: process.env.AGG_APP_ID!,
  apiKey: process.env.AGG_API_KEY!, // server-side only
});

// Every call now includes x-app-api-key automatically.
await client.getOrderbooks({ venueMarketIds: ["..."] });

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Raw HTTP

GET /app/config HTTP/1.1
Host: api.agg.market
x-app-id: your-app-id
x-app-api-key: agg_your-app-id_<64 hex>
A key that’s missing, malformed, unknown, revoked, expired, or bound to a different app is rejected with 401 / 403. The server returns identical "Invalid API key" messages for unknown and wrong-app cases — don’t rely on the error text to distinguish them.

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Locking Your App to Key-Only Access

By default the key is optional — requests without one proceed as before. If your integration is strictly server-side and you want AGG to hard-reject unauthenticated calls, flip Require API key in the admin dashboard’s Settings view for that app. Once enabled:
  • Any request to your app without a valid x-app-api-key returns 401 with "This app requires x-app-api-key for all requests."
  • Browser-SDK calls from your app will start failing — they don’t carry a key. Only turn this on for server-only apps.
  • The toggle can only be flipped by a signed-in admin. A read_write API key cannot call the endpoint that changes it (defense against a compromised key locking you out of your own app).
Enabling requireApiKey on a browser-facing app will break the integration. If in doubt, leave it off — the origin allowlist already protects browser callers from cross-site misuse.

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Rate Limits

A validated x-app-api-key moves you into a dedicated per-key budget:
  • Default — shared with your app’s general quota (RATE_LIMIT_APP_MAX, 18 000 requests/minute on the platform today).
  • Custom — AGG can raise or lower an individual key’s budget on request; once set, that key no longer shares IP-level throttling.
Keyed requests respond with 429 Too Many Requests and a Retry-After: <seconds> header when the per-key bucket is exhausted.

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Rotating a Key

  1. Create a new key in the admin dashboard.
  2. Deploy your backend with the new key.
  3. Confirm traffic is using the new key (check lastUsedAt in the admin).
  4. Revoke the old key.
Revoked and expired keys fail fast with 401 — there is no grace period.