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AppsFlyer Measure first app opens API

The Measure first app opens API from AppsFlyer — 1 operation(s) for measure first app opens.

AppsFlyer Measure first app opens API is one of 72 APIs that AppsFlyer publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Measure first app opens. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and authentication docs.

This API exposes 1 operation across 1 path, and defines 2 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against 2 base URLs: https://events.appsflyer.com/v1.0/s2s/, https://sandbox-events.appsflyer.com/v1.0/s2s/.

1 operations 1 paths 2 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://hq1.appsflyer.com/api/
Authentication
API Key
Resource Areas
1

Authentication & Security 1

AppsFlyer Measure first app opens API declares 1 security scheme for authenticating requests. An API key is passed in the header as authorization (ApiKeyAuth). By default, every request must be authenticated.

  • ApiKeyAuth — Create an HMAC signature by hashing the entire raw message. The HMAC is generated using SHA256 and uses the DevKey as the signature’s secret key. For example,…

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

Measure first app opens 1
POST
/first_open/app/{platform}/{app-id}
Measure first app opens
2 params body → 202400401403500

Schemas 2

The contract defines 2 schemas that model the data the API accepts and returns. Each schema is shown below with its type and property counts.

DeviceIds
array
A vector of the different device IDs. Can be either advertising ID or a custom ID. The custom device ID is mapped to appsflyeridin raw data reports.
SharingFilter
array
The sharing filter blocks the sharing of events via postbacks/API with integrated partners and other third-party integrations. Use the filter to fulfill regula…

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

appsflyer-measure-first-app-opens-api-openapi.yml Raw ↑

Other APIs AppsFlyer publishes across the network.

Creative External API
AppsFlyer MCP Server
AppsFlyer Account connections API
AppsFlyer Account Integration API
AppsFlyer Account splits API
AppsFlyer Active audiences API
AppsFlyer Active integrations API
AppsFlyer Ad Revenue raw data API
AppsFlyer Add excluded app API
AppsFlyer Additional Identifiers Handling API
AppsFlyer Aggregate (user acquisition and retargeting) API
AppsFlyer Allowed devices API
Where this information came from

This is an independent, third-party profile of AppsFlyer Measure first app opens API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

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