Overview

Verified impressions over time

By campaign

Campaign	Impressions	Est. spend	Last served
No verified impressions in this range yet.

Campaigns

New campaign

Headline Body

Image URL

Or pick a saved asset:

CTA link

Brand name Ad format

Category Daily budget limit (USD)

Leave blank for uncapped.

Ad group (optional)

Organizes campaigns for reporting — doesn't change how they're served. Create one on the Ad Groups page.

Your campaigns

No campaigns yet — create one above to start serving.

Ad Groups

A lightweight, organizational layer over campaigns — for grouping creative variants under one name for reporting. It doesn't change targeting or serving; every campaign still competes for slots independently in adselect.js.

New ad group

Name

Your ad groups

No ad groups yet.

Assets

Upload an image

File

PNG, JPEG, WEBP, or GIF — up to 5MB (enforced by Storage rules, not just this form).

Name

Your assets

No assets yet — upload one above.

Reports

Group by Range

Verified impressions

Group	Impressions	Est. spend
No data in this range yet.

Docs & API

Everything below matches the deployed worker exactly — there's no separate "real" API behind it.

GET/v1/ad

Fetch a raw JSON ad payload. Always $0 — nothing is billed on a fetch, only on a verified impression.

curl https://worker.lemprage.cobinar.com/v1/ad \
  -H "X-Lemprage-Api-Key: YOUR_KEY"

Response includes headline, body, image_url, cta_link, brand_name, category, and a security block with a single-use impression_id + signing_key your SDK uses to sign the Proof-of-Impression, plus a hidden _canary_pixel — never request it from real code.

POST/v1/impressions

Submit a signed Proof-of-Impression once an ad has been ≥50% in viewport for ≥1s with window focus. This is the only call that results in a charge.

POST /v1/impressions
{
  "impression_id": "...",
  "poi": { "viewportRatio": 0.8, "dwellMs": 1400, "windowFocused": true, ... },
  "signature": "HMAC-SHA256(signing_key, JSON.stringify(poi))"
}

POST/v1/billing/checkout

Advertiser-authenticated. Requires Authorization: Bearer <Firebase ID token>. Creates a Stripe Checkout session to top up ad balance.

POST /v1/billing/checkout
Authorization: Bearer <id token>
{ "amountCents": 2500 }

-> { "url": "https://checkout.stripe.com/..." }

Client SDK

Not published yet — the IntersectionObserver + visual-safety-check + PoI-signing client is the natural next piece once the endpoints above are stable.

Settings

API key

No key yet. Generate one to start requesting ads from worker.lemprage.cobinar.com.

Shown once. Store it now — Lemprage can't show it to you again.

Key active and ready.

Ad categories

Only these categories will ever be served on your site. Leave everything unchecked to accept all categories.

Billing

Ad balance

0.00USD

Spent against campaign delivery. Stripe test/live keys are configured per Worker environment, not in this page.

Add funds

Amount (USD)

Admin

Publishers

—

Campaigns

—

Verified impressions

—

Fraud blacklist

IPs blocked by the canary honeypot, ASN filtering, bot score, or a signature mismatch — see fraud.js.

IP	Reason	Blocked
Loading…

Grant admin

Promotes another signed-up account to admin. They'll need to sign out and back in for it to take effect.

Their user ID (uid)

Lemprage — headless ad delivery, verified at the edge.