Google Firebase App Check API
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For Agents
Exchange platform attestation tokens for Firebase App Check tokens and manage App Check provider configurations so an agent can lock backend resources to genuine app traffic.
Use for: Exchange a Play Integrity token for a Firebase App Check token, Generate an App Attest challenge for an iOS client, Configure App Check enforcement for the Firestore service, List all App Check debug tokens for an Android app
Not supported: Does not authenticate end users, scan code for vulnerabilities, or replace Firebase Security Rules — use for attesting app authenticity and enforcing App Check on Firebase services only.
The Firebase App Check API helps protect backend resources from abuse such as billing fraud and phishing by attesting that traffic originates from your genuine app. It supports multiple attestation providers including App Attest, Play Integrity, DeviceCheck, reCAPTCHA Enterprise, reCAPTCHA v3, and SafetyNet, exchanging provider tokens for short-lived App Check tokens. Use it to enforce app authenticity for Firestore, Realtime Database, Cloud Functions, and other Firebase backends.
Install Jentic One Beta
Connect the Firebase App Check API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Firebase App Check API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Firebase App Check API.
Exchange Apple App Attest, DeviceCheck, and Play Integrity tokens for App Check tokens
Verify reCAPTCHA Enterprise and reCAPTCHA v3 site tokens against an App Check resource
Generate App Attest challenges and Play Integrity challenges for client attestation flows
Configure per-service App Check enforcement for Firestore, Realtime Database, and Storage
Issue debug tokens for App Check during local development and CI testing
Use Cases
Patterns agents use Firebase App Check API for, with concrete tasks.
★ Backend Abuse Protection for Firestore
Lock Firestore reads and writes to traffic that has been attested by App Check, blocking direct API hits from emulators, scraped credentials, or modified app binaries. The API exposes service config endpoints under projects/{project}/services/{service} so enforcement can be toggled to UNENFORCED, AUDIT, or ENFORCED per service. Rolling out enforcement typically takes a release cycle to gather audit data before turning on full enforcement.
Call PATCH /v1/{+name} on projects/PROJECT/services/firestore.googleapis.com with enforcementMode=ENFORCED and confirm via GET /v1/{+name} that the new mode is set.
iOS App Attest Token Exchange
Exchange an Apple App Attest assertion or attestation produced on the device for a short-lived Firebase App Check token used in subsequent Firebase requests. The flow uses generateAppAttestChallenge to issue a challenge and exchangeAppAttestAttestation or exchangeAppAttestAssertion to redeem it. This proves the request came from a genuine, unmodified iOS app.
Call POST /v1/{+app}:generateAppAttestChallenge for an iOS app, then POST /v1/{+app}:exchangeAppAttestAttestation with the device-signed attestation and store the returned App Check token.
Android Play Integrity Verification
Validate Android client requests by exchanging a Play Integrity token from the Google Play Integrity API for a Firebase App Check token. The exchangePlayIntegrityToken endpoint lets backends trust that requests come from a Play-distributed binary running on a non-tampered device. This is the recommended attestation provider for current production Android apps.
Call POST /v1/{+app}:exchangePlayIntegrityToken with playIntegrityToken set to the JWS produced by Play Integrity for the Android app and store the returned token in the request header X-Firebase-AppCheck.
Agent-Managed App Check Rollout via Jentic
An AI agent connected to Jentic can configure and gradually roll out App Check enforcement across Firebase services in response to a security review. Jentic exposes the 27 App Check endpoints, the agent loads service config and debug-token operations, and the OAuth 2.0 flow stays inside the Jentic vault rather than the agent context.
Through Jentic, search for configure firebase app check enforcement, load the services.patch operation, and execute it with name=projects/PROJECT/services/firebasestorage.googleapis.com and enforcementMode=AUDIT.
Key Endpoints
27 endpoints — the firebase app check api helps protect backend resources from abuse such as billing fraud and phishing by attesting that traffic originates from your genuine app.
METHOD
PATH
DESCRIPTION
POST
/v1/{+app}:exchangePlayIntegrityToken
Exchange a Play Integrity token for an App Check token
POST
/v1/{+app}:exchangeAppAttestAttestation
Exchange an Apple App Attest attestation for an App Check token
POST
/v1/{+app}:exchangeRecaptchaEnterpriseToken
Exchange a reCAPTCHA Enterprise token for an App Check token
POST
/v1/{+app}:generateAppAttestChallenge
Generate a challenge for the App Attest flow
POST
/v1/{+app}:exchangeDebugToken
Exchange a debug token for an App Check token
POST
/v1/{+app}:exchangeCustomToken
Exchange a custom token for an App Check token
POST
/v1/{+app}:exchangePlayIntegrityToken
Exchange a Play Integrity token for an App Check token
POST
/v1/{+app}:exchangeAppAttestAttestation
Exchange an Apple App Attest attestation for an App Check token
POST
/v1/{+app}:exchangeRecaptchaEnterpriseToken
Exchange a reCAPTCHA Enterprise token for an App Check token
POST
/v1/{+app}:generateAppAttestChallenge
Generate a challenge for the App Attest flow
POST
/v1/{+app}:exchangeDebugToken
Exchange a debug token for an App Check token
POST
/v1/{+app}:exchangeCustomToken
Exchange a custom token for an App Check token
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
Google OAuth 2.0 service-account credentials are stored in the Jentic vault. Agents receive scoped access tokens for management calls and never see the underlying private key, while platform attestation tokens stay client-side as designed.
Intent-based discovery
Agents search Jentic with intents like exchange a play integrity token or configure firebase app check enforcement and Jentic returns the matching exchangePlayIntegrityToken or services.patch operations with their input schemas.
Time to first call
Direct integration with App Check: 3-7 days covering provider setup, client SDK changes, audit-mode rollout, and full enforcement. Through Jentic: under 1 hour for management calls; client-side attestation still requires the platform SDK.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Firebase App Check API through Jentic.
What authentication does the Firebase App Check API use?
Management endpoints (service configs, debug tokens, attestation configs) use Google OAuth 2.0 with the firebase or cloud-platform scope. Token exchange endpoints accept the platform attestation token (App Attest, Play Integrity, reCAPTCHA, etc.) directly. Through Jentic, OAuth credentials live in the encrypted vault and never enter agent context.
Can I exchange a Play Integrity token for an App Check token via the Firebase App Check API?
Yes. POST /v1/{+app}:exchangePlayIntegrityToken takes a Play Integrity JWS in the playIntegrityToken field and returns a short-lived App Check token suitable for the X-Firebase-AppCheck header on Firestore, Realtime Database, Cloud Storage, and Cloud Functions calls.
What are the rate limits for the Firebase App Check API?
Google enforces standard per-project quotas on the App Check API. Token exchange endpoints are designed for per-request invocation and scale with your app's traffic; management endpoints (service config, debug tokens) are subject to lower per-minute quotas typical of management APIs.
How do I enforce App Check on Firestore through Jentic?
Run pip install jentic, search for configure firebase app check enforcement, load the services.patch operation, and execute it with name=projects/PROJECT/services/firestore.googleapis.com and enforcementMode=ENFORCED. Sign up at https://app.jentic.com/sign-up.
Does the Firebase App Check API support reCAPTCHA Enterprise?
Yes. POST /v1/{+app}:exchangeRecaptchaEnterpriseToken accepts a reCAPTCHA Enterprise token from a Web client and returns an App Check token. There is also exchangeRecaptchaV3Token for reCAPTCHA v3 site keys.
Is the Firebase App Check API free?
App Check itself is included with Firebase at no extra charge under typical usage. Underlying provider services such as reCAPTCHA Enterprise are billed separately according to their own pricing.
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