Cloud Firestore API
Cloud Firestore API
Cloud Firestore API is Google Cloud managed NoSQL document database — real-time sync, offline support, strong consistency; a top choice for mobile / web app backends.
Real-time listeners (data changes auto-push to clients)
Limited query capabilities (no JOINs or complex filters)
Create project in Firebase Console + enable Firestore. Web SDK: const db = getFirestore(app); await setDoc(doc(db, "users", "alice"), {name: "Alice"});
Uptime · 30-day window
About this API
Firestore is Google's next-generation NoSQL document database launched 2017, upgrading from Firebase Realtime Database. Design core: (1) Document model (collection > document > sub-collection nested), fits mobile/web app data models; (2) Real-time sync (register onSnapshot listener, data changes auto-pushed); (3) Offline support (mobile cache during disconnect, auto-sync on reconnect); (4) Strong consistency (multi-region replication while guaranteeing read-after-write). Common uses: mobile app backend, collaboration apps (Google Docs-style), IoT device state, chat apps. vs. Firebase Realtime Database: Firestore is more structured, better scaling. Realtime DB is cheaper, lower latency. New projects: Firestore. vs. Supabase: Firestore is NoSQL, Supabase is Postgres relational — pick based on document vs relational need.
What you can build
- 1Mobile app real-time data sync (chat, collaboration)
- 2Web app backend (Firebase integration with auth + storage)
- 3IoT device state collection
- 4Small SaaS backend
Strengths & limitations
Strengths
- Real-time listeners (data changes auto-push to clients)
- Offline-first (mobile SDK handles network interruptions)
- Strong consistency (unlike Firebase Realtime DB which is eventual)
- Deep Firebase ecosystem integration
Limitations
- Limited query capabilities (no JOINs or complex filters)
- Per read/write pricing — expensive at scale
- Hard to migrate out
Example request
curl https://google.com/<endpoint>Getting started
Create project in Firebase Console + enable Firestore. Web SDK: const db = getFirestore(app); await setDoc(doc(db, "users", "alice"), {name: "Alice"});
FAQ
Firestore vs. Realtime DB?+
New projects: Firestore (more modern). Realtime DB suits simple key-value at scale with low-latency needs.
Firestore vs. Supabase?+
NoSQL + mobile-heavy: Firestore. SQL/relational + flexible queries: Supabase.
Technical details
- Auth type
- unknown
- Pricing
- unknown
- Protocols
- REST, gRPC
- SDKs
- python, javascript, typescript, go, java, swift, kotlin
- Response time
- 41 ms
- Last health check
- 5/12/2026, 7:37:31 AM
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