Google Firebase

Google Firebase is a comprehensive app development platform that provides backend services, SDKs, and APIs for building and scaling mobile and web applications, including authentication, real-time databases, cloud messaging, hosting, and analytics.

Google Firebase publishes 5 API contracts indexed on the APIs.io network, including Data API, Messages API, and 3 more. Tagged areas include Analytics, Authentication, Backend-as-a-Service, Cloud Messaging, and Google Cloud.

The Google Firebase catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Google Firebase’s developer surface includes authentication, getting-started guide, pricing, developer console, support, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.4/100 developing ▬ flat Agent 27/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

2 published contracts

Analytics Authentication Backend-as-a-ServiceCloud MessagingGoogle Cloud Hosting MobileReal-Time DatabaseIdentity Federation

Kin Score

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

Composite quality — 47.4/100 · developing

Contract Quality 11.2 / 19

Developer Ergonomics 8.4 / 15

Access Clarity 4.7 / 15

Operational Transparency 3.6 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 4 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 31.6 — up to +13.7 composite points
Contract Governance scores 13.6 — up to +10.4 composite points
Contract Quality scores 59.7 — up to +10.1 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/google-firebase/apis.yml: open an issue on github.com/api-evangelist/google-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)	undeclared	-	-	-

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 2

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.

OpenAPI

Prices published by Google 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; A/B Testing, Analytics, App Check, App Dist
Pay as you go (Blaze plan)	Pay as you go (Blaze plan) Includes: No-cost usage from Spark plan included*; if eligible, get $300 in free credit

Plan details, limits and sources →

Rate limits

Firestore writes per second per document: 1 writes per second
Firestore writes per second per index field: 500 writes per second
Realtime Database concurrent connections (Spark): 100 concurrent connections

Compiled by API Evangelist, not yet checked against Google Firebase's documentation. All 11 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Google Firebase Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Firebase Rate Limits

11 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Google Firebase

SLA

FinOps 1

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

Google Firebase Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Google Firebase Context

0 classes · 5 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Google Firebase — jsonschema rules

6 rules · 5 warnings 1 info

SPECTRAL

Google Firebase API Rules

18 rules · 10 errors 7 warnings 1 info

SPECTRAL

JSON Schema 9

Standalone JSON Schema definitions for this provider's data models.

AndroidConfig

4 properties

JSON SCHEMA

ApnsConfig

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

Google Firebase Authentication

oauth2 · 1 scheme

SECURITY

Google Firebase Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Firebase Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Firebase Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Google Firebase Agentic Access

6 operations · 5 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Console

Console

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 3

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

SDKs

SDKs

Access & Security 5

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Authentication

OAuthScopes

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Pricing

Pricing

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

name: Google Firebase
description: Google Firebase is a comprehensive app development platform that provides backend services, SDKs, and APIs for
  building and scaling mobile and web applications, including authentication, real-time databases, cloud messaging, hosting,
  and analytics.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-firebase.png
url: https://raw.githubusercontent.com/api-evangelist/google-firebase/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-09-16'
specificationVersion: '0.23'
tags:
- Analytics
- Authentication
- Backend-as-a-Service
- Cloud Messaging
- Google Cloud
- Hosting
- Mobile
- Real-Time Database
- Identity Federation
tags_raw:
- Analytics
- Authentication
- Backend as a Service
- Cloud Messaging
- Google Cloud
- Hosting
- Mobile
- Real-Time Database
- Identity Federation
apis:
- name: Firebase Authentication REST API
  description: The Firebase Authentication REST API enables developers to manage user authentication using email/password,
    phone, and federated identity providers such as Google, Facebook, and Apple. The API supports creating and signing in
    users, verifying tokens, managing user accounts, sending verification emails, and password resets through the Identity
    Toolkit endpoints.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://firebase.google.com/docs/auth
  baseURL: https://identitytoolkit.googleapis.com
  tags:
  - Authentication
  - Identity
  - User
  tags_raw:
  - Authentication
  - Identity
  - Users
  properties:
  - type: Documentation
    url: https://firebase.google.com/docs/reference/rest/auth
- name: Firebase Hosting REST API
  description: The Firebase Hosting REST API allows developers to programmatically manage web hosting deployments on Firebase.
    It supports creating new releases, managing site versions, uploading files, configuring custom domains, and managing release
    channels for preview deployments.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://firebase.google.com/docs/hosting
  baseURL: https://firebasehosting.googleapis.com
  tags:
  - Deployment
  - Hosting
  - Web
  properties:
  - type: Documentation
    url: https://firebase.google.com/docs/reference/hosting/rest
- name: Firebase Remote Config API
  description: The Firebase Remote Config API enables developers to change the behavior and appearance of their apps without
    requiring users to download an update. The API allows publishing new Remote Config templates, managing conditions and
    parameters, and rolling back to previous configurations.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://firebase.google.com/docs/remote-config
  baseURL: https://firebaseremoteconfig.googleapis.com
  tags:
  - Configuration
  - Feature Flags
  - Remote Config
  properties:
  - type: Documentation
    url: https://firebase.google.com/docs/reference/remote-config/rest
- aid: google-firebase:google-firebase-data-api
  name: Google Firebase Data API
  description: Operations for reading and writing database nodes
  humanURL: https://firebase.google.com/docs/database
  baseURL: https://firebaseio.com
  tags:
  - Data
  properties:
  - type: OpenAPI
    url: openapi/google-firebase-data-api-openapi.yml
  - type: Documentation
    url: https://firebase.google.com/docs/reference/rest/database
  - type: JSONSchema
    url: json-schema/google-firebase-database-node-schema.json
  - type: Documentation
    url: https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
  - type: JSONSchema
    url: json-schema/google-firebase-fcm-message-schema.json
- aid: google-firebase:google-firebase-messages-api
  name: Google Firebase Messages API
  description: Send messages to devices and topics
  humanURL: https://firebase.google.com/docs/database
  baseURL: https://firebaseio.com
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/google-firebase-messages-api-openapi.yml
  - type: Documentation
    url: https://firebase.google.com/docs/reference/rest/database
  - type: JSONSchema
    url: json-schema/google-firebase-database-node-schema.json
  - type: Documentation
    url: https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
  - type: JSONSchema
    url: json-schema/google-firebase-fcm-message-schema.json
common:
- type: Plans
  url: plans/google-firebase-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-firebase-rate-limits.yml
- type: FinOps
  url: finops/google-firebase-finops.yml
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-firebase/overview
- type: AgenticAccess
  url: agentic-access/google-firebase-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-firebase-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-firebase-domain-security.yml
- type: Authentication
  url: authentication/google-firebase-authentication.yml
- type: OAuthScopes
  url: scopes/google-firebase-scopes.yml
- type: GitHubOrganization
  url: https://github.com/firebase
- type: LinkedIn
  url: https://www.linkedin.com/showcase/firebase
- type: GettingStarted
  url: https://firebase.google.com/docs
- type: Pricing
  url: https://firebase.google.com/pricing
- type: Authentication
  url: https://firebase.google.com/docs/admin/setup
- type: Console
  url: https://console.firebase.google.com
- type: SDKs
  url: https://firebase.google.com/docs/libraries
- type: Support
  url: https://firebase.google.com/support
- type: StatusPage
  url: https://status.firebase.google.com
- type: JSONLD
  url: json-ld/google-firebase-context.jsonld
- type: Integrations
  url: https://firebase.google.com/integrations
- url: https://firebase.blog/rss.xml
  type: Blog
integrations:
- name: Firebase
- name: Flutter
- name: Google Ads
- name: AdMob video
- name: Google Marketing Platform
- name: Google Play
- name: Looker Studio
- name: BigQuery
- name: Slack
- name: Jira
- name: Android Studio
- name: Google Developers
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: google
x-relationship: product

Google Firebase API — frequently asked questions

Does Google Firebase have an API?

Yes. APIs.io lists 5 APIs from Google Firebase, including Firebase Authentication REST API, Firebase Hosting REST API and Firebase Remote Config API, and 2 more.

Is there an OpenAPI specification for the Google Firebase API?

Yes. APIs.io indexes 2 OpenAPI specifications for Google Firebase, each linked for download from this page.

How do I authenticate with the Google Firebase API?

Google Firebase documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Google Firebase Authentication.

How much does the Google Firebase API cost?

Google 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 Google Firebase, with each plan's price, limits and inclusions under Pricing on this page.

Is the Google Firebase API ready for AI agents?

Google Firebase has a Kin Score of 47.4 out of 100 (developing) and an Agent Readiness score of 27.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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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.

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