Firebase

Firebase is Google's app development platform — a backend-as-a-service (BaaS) suite for building, running, and growing web and mobile apps. It bundles managed backend products including Authentication, Cloud Firestore, Realtime Database, Cloud Storage, Cloud Functions, Hosting and App Hosting, Cloud Messaging (FCM), Remote Config, Crashlytics, Performance Monitoring, App Distribution, Test Lab, A/B Testing, App Check, Firebase AI Logic, and Extensions. Firebase exposes Google-hosted REST APIs (Management, Firestore, Realtime Database, FCM, Remote Config, Identity Toolkit) plus first-party client and Admin SDKs for Apple, Android, Web, Flutter, Unity, C++, Node.js, Python, Java, Go, and .NET, a cross-platform CLI (firebase-tools), a local Emulator Suite, and an official MCP server for agent-driven workflows.

Firebase is listed with 4 APIs on the APIs.io network. Tagged areas include Company, Backend-as-a-Service, Application Development, Mobile, and Web.

Firebase’s developer surface includes documentation, API reference, getting-started guide, developer console, signup flow, pricing, engineering blog, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

50.3/100 developing ▬ flat Agent 14/100 agent aware Front door AI 6/6 dominant Heartbeat 98/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

4 APIs 1 MCP Servers

Company Backend-as-a-Service Application Development Mobile Web Authentication Database Cloud Functions Messaging Google Real-Time

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 50.3/100 · developing

Contract Quality 0.0 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 13.9 / 17

Operational Transparency 5.8 / 11

Contract Governance 0.0 / 10

Discoverability 6.5 / 9

Regulatory Posture 6.0 / 15

Agent readiness — 14/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Contract Governance scores 0.0 — up to +12.0 composite points
Operational Transparency scores 52.6 — up to +6.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/firebase/apis.yml: open an issue on github.com/api-evangelist/firebase to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Mobile SDK Publishers (Play SDK Index, CocoaPods, ADA certification)	covered	22.3	-	-
Official SDKs on Packagist, pub.dev and Hex	covered	22.3	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Firebase Management API

REST API to programmatically create and manage Firebase projects, apps (Web, Android, Apple), and their configuration.

Cloud Firestore REST API

REST API for reading and writing documents, running queries, and managing indexes in Cloud Firestore.

Firebase Realtime Database REST API

REST API to read and write JSON data in the Firebase Realtime Database over HTTPS.

Firebase Cloud Messaging HTTP v1 API

REST API to send notification and data messages to devices via Firebase Cloud Messaging (FCM).

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Firebase MCP Server

Local (stdio) MCP server.

MCP SERVER

Firebase API pricing

Prices published by Firebase, read 2026-10-28 from firebase.google.com/pricing.

Plan	Price
No-cost (Spark plan)	No-cost (Spark plan) Includes: Generous no-cost usage limits; no payment method needed; e.g. Firestore 1 GiB stored, 20K writes/day
Pay as you go (Blaze plan)	No-cost usage from Spark plan included* Includes: Free tiers e.g. Cloud Functions 2M invocations/month, App Hosting 10 GiB/month bandwidth, Cloud Stor

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Firebase Plans Pricing

2 plans

PLANS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Firebase Finops

FINOPS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Firebase Authentication

apiKey/oauth2/bearer/serviceAccount/idToken · 5 schemes

SECURITY

Firebase Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Firebase Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Firebase Scopes

8 scopes · authorizationCode

8 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Console

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Lifecycle

Lifecycle

Components

Components

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 8

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

TrustCenter

Compliance

Security

Authentication

OAuthScopes

SecurityTxt

Scroll for all 8

Operate 5

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

Deprecation

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: firebase
name: Firebase
description: Firebase is Google's app development platform — a backend-as-a-service (BaaS) suite for building, running, and
  growing web and mobile apps. It bundles managed backend products including Authentication, Cloud Firestore, Realtime Database,
  Cloud Storage, Cloud Functions, Hosting and App Hosting, Cloud Messaging (FCM), Remote Config, Crashlytics, Performance
  Monitoring, App Distribution, Test Lab, A/B Testing, App Check, Firebase AI Logic, and Extensions. Firebase exposes Google-hosted
  REST APIs (Management, Firestore, Realtime Database, FCM, Remote Config, Identity Toolkit) plus first-party client and Admin
  SDKs for Apple, Android, Web, Flutter, Unity, C++, Node.js, Python, Java, Go, and .NET, a cross-platform CLI (firebase-tools),
  a local Emulator Suite, and an official MCP server for agent-driven workflows.
url: https://raw.githubusercontent.com/api-evangelist/firebase/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
- union-square-ventures
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - plans
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
image: https://firebase.google.com/downloads/brand-guidelines/PNG/logo-logomark.png
tags:
- Company
- Backend-as-a-Service
- Application Development
- Mobile
- Web
- Authentication
- Database
- Cloud Functions
- Messaging
- Google
- Real-Time
tags_raw:
- Company
- Backend as a Service
- Application Development
- Mobile
- Web
- Authentication
- Database
- Cloud Functions
- Messaging
- Google
- Real-Time
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Firebase Management API
  description: REST API to programmatically create and manage Firebase projects, apps (Web, Android, Apple), and their configuration.
  humanURL: https://firebase.google.com/docs/projects/api/reference/rest
  baseURL: https://firebase.googleapis.com
  properties:
  - type: APIReference
    url: https://firebase.google.com/docs/projects/api/reference/rest
- name: Cloud Firestore REST API
  description: REST API for reading and writing documents, running queries, and managing indexes in Cloud Firestore.
  humanURL: https://firebase.google.com/docs/firestore/use-rest-api
  baseURL: https://firestore.googleapis.com
  properties:
  - type: APIReference
    url: https://firebase.google.com/docs/reference/rest/firestore
- name: Firebase Realtime Database REST API
  description: REST API to read and write JSON data in the Firebase Realtime Database over HTTPS.
  humanURL: https://firebase.google.com/docs/reference/rest/database
  baseURL: https://firebaseio.com
  properties:
  - type: APIReference
    url: https://firebase.google.com/docs/reference/rest/database
- name: Firebase Cloud Messaging HTTP v1 API
  description: REST API to send notification and data messages to devices via Firebase Cloud Messaging (FCM).
  humanURL: https://firebase.google.com/docs/reference/fcm/rest
  baseURL: https://fcm.googleapis.com
  properties:
  - type: APIReference
    url: https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
common:
- type: Plans
  url: plans/firebase-plans-pricing.yml
- type: VulnerabilityDisclosure
  url: security/firebase-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/firebase-domain-security.yml
- type: Website
  url: https://firebase.google.com
- type: DeveloperPortal
  url: https://firebase.google.com
- type: Documentation
  url: https://firebase.google.com/docs
- type: APIReference
  url: https://firebase.google.com/docs/reference
- type: GettingStarted
  url: https://firebase.google.com/docs/guides
- type: Console
  url: https://console.firebase.google.com
- type: SignUp
  url: https://console.firebase.google.com
- type: Pricing
  url: https://firebase.google.com/pricing
- type: Blog
  url: https://firebase.blog
- type: Support
  url: https://firebase.google.com/support
- type: GitHubOrganization
  url: https://github.com/firebase
- type: StatusPage
  url: https://status.firebase.google.com
- type: ChangeLog
  url: https://firebase.google.com/support/releases
- type: TermsOfService
  url: https://firebase.google.com/terms
- type: PrivacyPolicy
  url: https://policies.google.com/privacy
- type: TrustCenter
  url: https://cloud.google.com/security/compliance
- type: Compliance
  url: https://cloud.google.com/security/compliance
- type: Deprecation
  url: https://cloud.google.com/terms/deprecation
- type: Security
  url: https://g.co/vrp
- type: Packages
  url: packages/firebase-packages.yml
- type: SDKs
  url: packages/firebase-packages.yml
- type: CLI
  url: cli/firebase-cli.yml
- type: MCPServer
  url: mcp/firebase-mcp.yml
- type: Authentication
  url: authentication/firebase-authentication.yml
- type: OAuthScopes
  url: scopes/firebase-scopes.yml
- type: Conventions
  url: conventions/firebase-conventions.yml
- type: Lifecycle
  url: lifecycle/firebase-lifecycle.yml
- type: ChangeLog
  url: changelog/firebase-changelog.yml
- type: Components
  url: components/firebase-components.yml
- type: WellKnown
  url: well-known/firebase-well-known.yml
- type: SecurityTxt
  url: well-known/firebase-security.txt
- type: LLMsTxt
  url: llms/firebase-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Firebase API — frequently asked questions

Does Firebase have an API?

Yes. APIs.io lists 4 APIs from Firebase, including Firebase Management API, Cloud Firestore REST API and Firebase Realtime Database REST API, and 1 more.

How do I authenticate with the Firebase API?

Firebase documents its authentication (apiKey/oauth2/bearer/serviceAccount/idToken · 5 schemes). The details are profiled on APIs.io as Firebase Authentication.

How much does the Firebase API cost?

Firebase publishes its prices; its No-cost (Spark plan) plan is No-cost (Spark plan) as of 2026-10-28. APIs.io lists 2 pricing plans for Firebase, with each plan's price, limits and inclusions under Pricing on this page.

Does Firebase have an MCP server?

Yes. APIs.io lists 1 MCP server for Firebase: Local (stdio) MCP server.

Is the Firebase API ready for AI agents?

Firebase has a Kin Score of 50.3 out of 100 (developing) and an Agent Readiness score of 14.2 (agent-aware), scored by API Evangelist on 2026-11-06.

Compared on APIs.io

Side by side with a competitor, using the compare_providers tool: facet by facet, with the full tool response.

vs Supabase Supabase vs Firebase: open contracts against a polished SDK
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MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

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