AdTech APIs, Data Pipelines & Integrations

RESTful Resource Operations

GET Fetch inventory, performance reports, and line item statuses.
POST Create campaigns, submit bids, generate bulk report jobs.
PUT Full replacement of targeting or creative flight dates.
DELETE Archive deal IDs or deactivate underperforming creatives.

OAuth 2.0 & Token Lifecycles

• OAuth 2.0 Client Credentials: Machine-to-machine server communication (GAM API, Google Cloud).
• Bearer Tokens: Ephemeral JWTs passed in Authorization: Bearer <token>.
• API Keys: Parameterized validation for read-only telemetry and webhook verification.

Rate Limits & Safe Retries

• Rate Limiting: Respecting 429 Too Many Requests and Retry-After headers.
• Exponential Backoff: Retrying transient 5xx errors with jitter (e.g. 2s, 4s, 8s).
• Idempotency Keys: Passing Idempotency-Key in POST requests to prevent duplicate ad credit billing.

Webhooks & Stream Alerts

• Real-Time Postbacks: MMP attribution alerts (AppsFlyer install postbacks).
• Payload Signing: HMAC-SHA256 signature verification in X-Signature header.
• Dead-Letter Queues (DLQ): Capturing malformed webhook events for automated triage.

Campaign Channel Aggregations & eCPM

Business Question: What is the total spend, aggregate CTR, and average eCPM across active campaigns grouped by delivery channel?

-- Executable MySQL Query
SELECT 
    channel,
    COUNT(id) AS total_campaigns,
    SUM(spend) AS total_spend_usd,
    SUM(impressions) AS total_impressions,
    SUM(clicks) AS total_clicks,
    ROUND((SUM(clicks) / NULLIF(SUM(impressions), 0)) * 100, 3) AS aggregate_ctr_pct,
    ROUND((SUM(spend) / NULLIF(SUM(impressions), 0)) * 1000, 2) AS aggregate_ecpm_usd
FROM campaigns
WHERE status = 'active'
GROUP BY channel
ORDER BY total_spend_usd DESC;

Expected Output: Rows for CTV ($42.1k spend, $22.78 eCPM), Mobile Display ($18.4k spend, $5.00 eCPM), etc.

GAM vs. DSP Hourly Discrepancy Reconciliation

Business Question: Where does the billing variance between publisher ad server impressions and DSP billed logs exceed 15%?

-- Illustrative MySQL 8.0 CTE Query
WITH hourly_metrics AS (
    SELECT 
        DATE_FORMAT(g.event_time, '%Y-%m-%d %H:00:00') AS log_hour,
        g.ad_unit_id,
        COUNT(g.impression_id) AS gam_impressions,
        COUNT(d.dsp_impression_id) AS dsp_impressions
    FROM gam_data_transfer g
    LEFT JOIN dsp_billing_logs d 
      ON g.auction_id = d.auction_id
    WHERE g.event_time >= NOW() - INTERVAL 24 HOUR
    GROUP BY log_hour, g.ad_unit_id
)
SELECT 
    log_hour,
    ad_unit_id,
    gam_impressions,
    dsp_impressions,
    ROUND(((gam_impressions - dsp_impressions) / CAST(gam_impressions AS DECIMAL(10,2))) * 100, 2) AS discrepancy_pct
FROM hourly_metrics
WHERE gam_impressions > 0 
  AND ((gam_impressions - dsp_impressions) / CAST(gam_impressions AS DECIMAL(10,2))) > 0.15
ORDER BY discrepancy_pct DESC;

Expected Output: Log hours with discrepancy > 15% flagged for VAST render abort or tracking beacon drop triage.