Zernio
Zernio
API Reference

Targeting

Search targeting optionsGETSuggested bid and budget boundsPOSTImpressions, clicks and spend forecastPOSTEstimate audience reachPOST
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Targeting

Estimate audience reach

Returns a normalized pre-flight audience-size estimate for a targeting spec, before any campaign is created. Backed by each platform's native reach API (Meta delivery_estimate, LinkedIn audienceCounts, X audience_summary, Pinterest audience_sizing).

Platforms without a usable pre-flight reach API (Google Search/Display, TikTok) return available: false with no bounds, so clients can hide or grey out the estimate rather than treat the absence as an error.

PlatformsMetaLinkedInPinterestX
POST
/v1/ads/targeting/reach-estimate

Authorization

bearerAuth
AuthorizationBearer <token>

API key authentication: send your Zernio API key in the Authorization header, prefixed with Bearer.

In: header

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

{  "available": true,  "lower": 0,  "upper": 0,  "daily": 0,  "currency": "string",  "estimateReady": true}
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Impressions, clicks and spend forecast

LinkedIn-only. Forecasted impressions, clicks, spend and ~20 other metrics for a targeting spec over a time range. Wraps LinkedIn's `adSupplyForecasts` finder. Each returned series carries a `metricType` (IMPRESSION, CLICK, SPENDING, MAX_POTENTIAL_BUDGET, COST_PER_MILLION_IMPRESSIONS, ...) and a `granularity` (DAILY, SEVEN_DAY, THIRTY_DAY, CUSTOM). LinkedIn caps the daily spending forecast at 1.2x the daily budget and returns 0 once the total budget is exhausted. Non-LinkedIn accounts return `available: false`.

Search the public Ad Library

Competitor and market research over the public ad archives. Meta's Ad Library (`GET /ads_archive`) is searched with Zernio's own developer access, so `platform=meta` needs no connected account at all. LinkedIn's Ad Library (`GET /rest/adLibrary`) runs on a connected `linkedin` / `linkedinads` account, passed as `accountId`. Passing a Meta account as `accountId` also selects Meta. Rows are returned in the platform's raw shape under `data`; `paging.after` is an opaque cursor on both (`null` when exhausted). **Meta coverage.** Political and social-issue ads are searchable worldwide. Every other ad is in the archive only if it was delivered to the EU or UK within the last year, so a US-only commercial advertiser is invisible. Spend, impressions and demographics are political-only fields and are left out of the default projection; request them via `fields`. All customers share Zernio's Meta quota, so a `429` means back off for a minute. **LinkedIn coverage.** Ads served after June 1 2023, worldwide, kept for a year after their last impression. EU-delivered ads carry impression ranges and the disclosed targeting facets. Pages are capped at 25 ads (`limit` > 25 is a 400); `after` is the next offset. Which params apply: `q`, `countries`, `since`, `until`, `limit`, `after` on both; `pageIds`, `adType`, `status`, `platforms`, `mediaType`, `languages`, `searchType`, `fields` are Meta-only; `advertiser` is LinkedIn-only. Passing a param the account's platform does not support is a 400 naming the param.

accountId*string

Zernio account ID on the target ad platform (the estimate runs against its platform).

adAccountId*string

Required. The platform ad-account ID the reach call runs against (Meta act_..., LinkedIn numeric sponsoredAccount ID, Pinterest ad-account ID, X account ID) - every backing reach API is scoped to one ad account. Get it from GET /v1/ads/accounts.

spec*

The targeting spec to estimate. Same shape used by POST /v1/ads/create.

optimizationGoal?string

Optional. The optimization goal the estimate should assume (platform's own vocabulary, e.g. Meta REACH, LINK_CLICKS, OFFSITE_CONVERSIONS). Some platforms vary the estimate by goal; omit to use the platform default.