Per-client onboarding eats your margin.

Every new merchant: install Meta pixel + CAPI, install Google tags + Enhanced Conversions, install TikTok pixel + Events API, install Klaviyo, configure dedup, test refunds, debug consent. Two weeks per client at agency rates is $4-8k of unbillable engineering before the first ad runs.

One-off tools don't survive 20+ accounts.

Stape / Elevar work great for one merchant. At 20 clients you're managing 20 GTM containers, 20 sets of credentials, 20 versions of dedup logic, 20 places where iOS 17.4 broke fbp persistence. Auditing 'is tracking healthy across all clients?' takes a person, not a query.

Reporting is a Frankenstein of CSVs.

Clients want one number: 'what was my real CAC last week?' Pulling that from Meta Ads + Google Ads + the store's Stripe + Klaviyo means a junior buyer spends Friday afternoon stitching exports together. The agency that ships that number in real time, white-labeled, retains the contract.

Create the agency workspace

One signup. Your agency gets a parent workspace with its own user roles (owner, account-manager, buyer, viewer). Single sign-on via Google or Okta. 2FA enforced for owner.

Add a merchant in 90s

Click 'Add Client', name them, pick the platform (Shopify / BigCommerce / WooCommerce / custom). TrackLayer provisions a per-client API key, webhook URL, and dashboard view. Hand the install link to the client's dev or run it yourself.

White-label the reporting

Custom subdomain (reports.<your-agency>.com). Your logo, your colors, your fonts. Clients log in with magic-link email, see only their own workspace. No TrackLayer branding on the client view.

AI Marketing Operator audits all clients

The Operator scans every client workspace nightly: 'merchant_42 has 23% Meta dedup mismatch — investigate'. 'merchant_88 refund attribution stopped 4 days ago'. You triage from one inbox; clients see a green dashboard.

curl https://api.tracklayer.io/v1/agency/merchants \
  -H "Authorization: Bearer sk_agency_LiveAg3ncyKey..."

{
  "data": [
    {
      "merchant_id": "northfield_42",
      "name": "Northfield Apparel",
      "platform": "shopify",
      "status": "healthy",
      "events_30d": 18420,
      "dedup_match_rate": 0.96,
      "last_event_at": "2026-04-26T09:14:32Z"
    },
    {
      "merchant_id": "halcyonlabs_88",
      "name": "Halcyon Labs",
      "platform": "bigcommerce",
      "status": "warning",
      "events_30d": 41200,
      "dedup_match_rate": 0.74,
      "last_event_at": "2026-04-26T09:14:01Z",
      "issues": ["meta_dedup_below_threshold"]
    }
  ],
  "total": 23
}

curl -X POST \
  https://api.tracklayer.io/v1/agency/merchants/halcyonlabs_88/keys/rotate \
  -H "Authorization: Bearer sk_agency_LiveAg3ncyKey..." \
  -H "Content-Type: application/json" \
  -d '{ "reason": "client_offboarded_dev" }'

{
  "merchant_id": "halcyonlabs_88",
  "new_key": "sk_merchant_NewLiveK3y_2026...",
  "rotated_at": "2026-04-26T09:18:00Z",
  "previous_key_revoked_at": "2026-04-26T09:18:00Z",
  "audit_id": "aud_01HW2K3M..."
}