Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 6 Complete, well-documented, and agent-ready

Facebook Conversions APISend web and offline events directly to Facebook for improved tracking and attribution.75.9 Optimizely Attribution APIGet a list of bucketing decisions for a visitor.75.5 CycleCalcs Attribution APIThe Attribution API from CycleCalcs — 1 operation(s) for attribution.70.4 Nutshell Sources APILead sources — how leads arrive at your website and learn about your business. 4 operation(s) across 3 path...66.8 Singular Reporting APIAsynchronous REST API for programmatically pulling Singular's unified marketing data — attribution, cost, a...66.7 Singular Server-to-Server (S2S) APIServer-side ingestion endpoints for reporting sessions/launches and in-app events without a client SDK — us...66.7

Strong 15 Solid coverage with minor gaps

Northbeam MCP ServerFirst-party remote Model Context Protocol server giving an agent read-only access to the caller's Northbeam...66.4 BuiltWith Tags APIThe Tags API from BuiltWith — 1 operation(s) for tags.66.2 Snapchat Marketing APIOAuth 2.0 REST API for managing Snapchat advertising: organizations, ad accounts, campaigns, ad squads, ads...58.7 ServiceTitan Marketing APIManage marketing campaigns, campaign categories, suppression lists, and attribution data that powers cost-p...57.7 NextRoll GraphQL Reporting APIGraphQL API for retrieving all AdRoll and AdRoll ABM reporting data in a single request — organization, adv...56.2 NextRoll Server-to-Server (S2S) Event APIServer-side event ingestion API for sending user events and conversions to AdRoll directly from your own se...56.2 Wefunder Attribution APIThe Attribution API from Wefunder — 2 operation(s) for attribution.56.2 Airbridge APIThe Airbridge REST API. Resource-oriented URLs over HTTPS, JSON responses, bearer API-token authentication ...55.8 Airbridge MCP ServerAirbridge's hosted Model Context Protocol server. Streamable HTTP transport at https://mcp.airbridge.io/mcp...55.8 The Trade Desk Real-Time Conversions APIThe Trade Desk Real-Time Conversions API (formerly the Real-Time Conversion Events API) allows advertisers ...55.7 CJ Affiliate Click Events APIServer-to-server JSON REST API through which CJ partners register a consumer click and receive back the fin...55.6 CJ Affiliate Publisher Tracking APIServer-to-server JSON REST API through which publishers exchange a standard CJ tracking link for a final de...55.6 Disco Event APIThe server-to-server conversion intake used by advertisers who cannot run the Web SDK. A POST carries an ev...54.6 Partnerize Attribution APINote: Attribution is a limited availability BETA feature. Attribution features allow you to control who the...54.5 Partnerize Brands APIREST API for brands to manage networks, campaigns, payments, commissions, attribution, and partner relation...54.5

Developing 18 Usable, with meaningful gaps to close

Allo-Media Hermes Call TrackingFirst-party browser JavaScript that performs dynamic number insertion so an inbound phone call can be attri...52.8 SmartNews Ads Conversion APIServer-to-server conversion event ingestion for SmartNews Ads. Advertisers POST self-attributed web and app...52.5 SegmentStream MCPHosted Model Context Protocol server exposing SegmentStream's marketing measurement, attribution, budget-op...50.4 Foursquare Measurement API (MAPI)API for attribution and audience measurement using Foursquare visit panels.49.0 Morningstar Investment Analysis APIsDynamic Services investment-analysis endpoints - securities data (US and global ecint), screening, autocomp...49.0 SegMetrics Import APIThe v1 Import API lets a customer push their own data into a SegMetrics integration — contacts (with UTM at...48.2 SegMetrics Reporting APIThe Reporting API returns the metrics SegMetrics generates — saved report data (KPIs, graph series and a ta...48.2 Remerge Event Tracking APIServer-to-server ingestion API that Remerge clients and measurement partners use to forward data into the R...47.8 MNTN Attribution APIAdvertiser attribution windows, estimates, sales cycle, and verified-visit blacklist settings.47.7 MNTN Reporting API 3.0Public partner reporting surface at api3.mountain.com. GET /apilist returns the tables and columns availabl...47.7 CMS — Centers for Medicare & Medicaid Services Attribution APIThe Attribution API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for attribution.47.2 Chartbeat Conversion APIRetrieve the top articles that drove a given conversion event for a specified host and date range, with cou...47.1 Voyant.io Attribution APIThe Attribution API from Voyant.io — 5 operation(s) for attribution.46.4 Keepface Affiliate API v2The public server-side affiliate tracking API for Keepface. Brands POST sale and refund events from their o...45.9 Lever Sources APIRead source attribution (job board, referral, sourced) for opportunities to drive sourcing analytics.45.1 Chainalysis Entities APIEnterprise REST API exposing Chainalysis's labelled-entity dataset - look up the entity behind a given addr...42.5 FERMAT Pixel v2First-party browser ES module (claire.mjs) a brand embeds to emit commerce telemetry to FERMAT. Exposes a w...42.4 Yahoo Conversion APIServer-to-server conversion-event API (CAPI) for campaign measurement, attribution and optimization, positi...41.6

Thin 5 Limited public surface area

Clear Channel Outdoor RADAR Data SuiteRADAR is CCO's first-party audience-planning, attribution and measurement suite built on aggregated and/or ...38.3 Knotch Events APIServer-side conversion event ingestion. Accepts batches of up to 100 events over HTTPS with Bearer authenti...35.6 Qeen Mobile Analytics SDKQeen's first-party mobile analytics and commerce-event SDK, shipped as a binary XCFramework for iOS (Swift ...34.0 MAI Pixel Event Collection APIThe one public, callable API MAI publishes. A single unauthenticated write-only endpoint, POST /api/collect...31.0 Lucky Cart Promo Matching APIThe promo-matching and creative-delivery host used by the JavaScript SDK. It serves the same banner selecti...27.7

Emerging 4 Early or largely undocumented

Rokt Event APIEnables sending conversion data and client events to Rokt to close the attribution loop for campaign perfor...23.3 Valid Chat With Your Ads MCP ServerA live first-party Model Context Protocol server that lets a Valid managed-service client query their whole...21.4 Bloomberg PORT (Portfolio Risk and Analytics)Bloomberg's portfolio risk and analytics solution providing attribution, risk factor analysis, stress testi...18.2 Tapad Event Tracking APITapad's app install and in-app event tracking beacon, documented in the company's own open-source mobile SD...14.6

Minimal 2 Almost no public developer surface

Sync API User AcquisitionUser acquisition API leveraging advanced algorithms to optimize user acquisition strategies for mobile apps...10.2 Elementus Attribution APIREST API that resolves a batch of blockchain addresses to attribution data — beneficial owner, custodian, e...9.2

Companies reaching this through an API (29)

These companies publish an API, specification or operation carrying “Attribution” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Score breakdown

Frequency

56.7

log-scaled weighted occurrences

Breadth

1.7

spread across providers

Quality lift

46.2

mean composite of providers using it

Cohesion

11.3

strength of nearest seed neighbor

Where this tag sits

72 providers carry this tag directly, and 75 counting the 5 narrower tags below — 3 more to reach.

Marketing Analytics broader Mobile Attribution 3 providers Marketing Attribution 7 providers Multi-Touch Attribution 0 providers B2B Attribution 0 providers Revenue Attribution 0 providers

Where this tag comes from

Provider tag72

Api tag49

Openapi tag8

Openapi op tag21

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find_cohortsEvery scored population of providers in the catalog.

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Attribution

Providers using this tag (72)

APIs with this tag (50)