Google Chat

The Google Chat API enables building Chat apps that integrate with Google Chat. It provides RESTful access to manage Chat spaces, memberships, messages, reactions, attachments, and custom emojis. The API supports creating conversational bots, automating messaging workflows, and managing organizational chat resources programmatically.

Google Chat publishes 7 API contracts indexed on the APIs.io network, including Google Chat API, Members API, Messages API, and 4 more. Tagged areas include Chat, Collaboration, Google, Google Workspace, and Messaging.

The Google Chat catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Google Chat’s developer surface includes developer portal, getting-started guide, authentication, pricing, support, engineering blog, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.6/100 developing ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract

Chat Collaboration Google Google Workspace Messaging Spaces

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Application Communications

AE-150

Messages

POST /v1/{parent}/messages

Kin Score

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

Composite quality — 51.6/100 · developing

Contract Quality 9.7 / 19

Developer Ergonomics 7.7 / 15

Access Clarity 10.7 / 15

Operational Transparency 3.6 / 10

Contract Governance 0.9 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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 0 / 4

Delegated User Identity 0 / 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

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 51.8 — up to +12.1 composite points
Contract Governance scores 9.8 — up to +10.8 composite points
Developer Ergonomics scores 51.2 — up to +9.8 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-chat/apis.yml: open an issue on github.com/api-evangelist/google-chat 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
Smartsheet Marketplace (connectors and partner-built solutions on Smartsheet)	long-tail	5.0 (thin)	-	-

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

Google Chat Google Chat API

The Google Chat API API from Google Chat — 1 operation(s) for google chat api.

Google Chat Members API

The Members API from Google Chat — 1 operation(s) for members.

Google Chat Messages API

The Messages API from Google Chat — 1 operation(s) for messages.

Google Chat Reactions API

The Reactions API from Google Chat — 1 operation(s) for reactions.

Google Chat Spaces API

The Spaces API from Google Chat — 1 operation(s) for spaces.

Google Chat Spaces:setup API

The Spaces:setup API from Google Chat — 1 operation(s) for spaces:setup.

Google Chat Custom Emojis API

The Custom Emojis API from Google Chat — 1 operation(s) for custom emojis.

Scroll for all 7

Postman Collections 7

Ready-to-run Postman collections for exercising this provider's APIs.

Google Chat customEmojis API

POSTMAN

Google Chat customEmojis Google Chat API API

POSTMAN

Google Chat customEmojis Members API

POSTMAN

Google Chat customEmojis Messages API

POSTMAN

Google Chat customEmojis Reactions API

POSTMAN

Google Chat customEmojis Spaces API

POSTMAN

Google Chat customEmojis Spaces:setup API

POSTMAN

Scroll for all 7

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Google Chat customEmojis API

OPEN COLLECTION

Google Chat customEmojis Google Chat API API

OPEN COLLECTION

Google Chat customEmojis Members API

OPEN COLLECTION

Google Chat customEmojis Messages API

OPEN COLLECTION

Google Chat customEmojis Reactions API

OPEN COLLECTION

Google Chat customEmojis Spaces API

OPEN COLLECTION

Google Chat customEmojis Spaces:setup API

OPEN COLLECTION

Google Chat API

OPEN COLLECTION

Scroll for all 8

Google Chat API pricing

Prices published by Google Chat, read 2026-10-28 from workspace.google.com/pricing.

Plan	Price
Starter	$7 **/ user per month Includes: 30 GB pooled storage per person; business email; Gemini AI assistant in Gmail; video meetings, 100 p
Standard	$14 **/ user per month Includes: 2 TB storage; Gemini in Gmail, Docs, Meet; recordings; 150 participants
Plus	$22 **/ user per month Includes: 5 TB storage; eDiscovery; 500 participants; Vault; Secure LDAP
Enterprise	Contact sales Includes: 5 TB or upgrade for more; DLP; 1000 participants; Cloud Identity Premium

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Google Chat's documentation. All 5 limits →

Billed by: user · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Google Chat Plans Pricing

4 plans

PLANS

Google Chat Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Chat Rate Limits

5 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 Chat

SLA

FinOps 1

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

Google Chat Finops

FINOPS

Semantic Vocabularies 1

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

Json Ld Context

4 classes · 4 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Chat — jsonschema rules

6 rules · 4 warnings 2 info

SPECTRAL

Security Posture 2

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

Google Chat Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Chat Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Google Chat Agentic Access

14 operations · 8 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

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 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: google-chat
name: Google Chat
description: The Google Chat API enables building Chat apps that integrate with Google Chat. It provides RESTful access to
  manage Chat spaces, memberships, messages, reactions, attachments, and custom emojis. The API supports creating conversational
  bots, automating messaging workflows, and managing organizational chat resources programmatically.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-chat.png
url: https://raw.githubusercontent.com/api-evangelist/google-chat/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-09-16'
specificationVersion: '0.23'
type: Index
tags:
- Chat
- Collaboration
- Google
- Google Workspace
- Messaging
- Spaces
tags_raw:
- Chat
- Collaboration
- Google
- Google Workspace
- Messaging
- Spaces
apis:
- aid: google-chat:google-chat-google-chat-api-api
  name: Google Chat Google Chat API
  description: The Google Chat API API from Google Chat — 1 operation(s) for google chat api.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Google Chat API
  properties:
  - type: OpenAPI
    url: openapi/google-chat-google-chat-api-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-members-api
  name: Google Chat Members API
  description: The Members API from Google Chat — 1 operation(s) for members.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Members
  properties:
  - type: OpenAPI
    url: openapi/google-chat-members-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-messages-api
  name: Google Chat Messages API
  description: The Messages API from Google Chat — 1 operation(s) for messages.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/google-chat-messages-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-reactions-api
  name: Google Chat Reactions API
  description: The Reactions API from Google Chat — 1 operation(s) for reactions.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Reactions
  properties:
  - type: OpenAPI
    url: openapi/google-chat-reactions-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-spaces-api
  name: Google Chat Spaces API
  description: The Spaces API from Google Chat — 1 operation(s) for spaces.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Spaces
  tags_raw:
  - Spaces
  properties:
  - type: OpenAPI
    url: openapi/google-chat-spaces-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-spaces-setup-api
  name: Google Chat Spaces:setup API
  description: The Spaces:setup API from Google Chat — 1 operation(s) for spaces:setup.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Spaces:setup
  properties:
  - type: OpenAPI
    url: openapi/google-chat-spaces-setup-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
- aid: google-chat:google-chat-custom-emojis-api
  name: Google Chat Custom Emojis API
  description: The Custom Emojis API from Google Chat — 1 operation(s) for custom emojis.
  humanURL: https://developers.google.com/workspace/chat/api/guides
  baseURL: https://chat.googleapis.com
  tags:
  - Custom Emojis
  properties:
  - type: OpenAPI
    url: openapi/google-chat-custom-emojis-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/workspace/chat/api/guides
  - type: Authentication
    url: https://developers.google.com/workspace/chat/authenticate-authorize
  - type: GettingStarted
    url: https://developers.google.com/workspace/chat/quickstart/apps-script
  - type: JSONSchema
    url: json-schema/json-schema.yml
  - type: JSONLD
    url: json-ld/json-ld.jsonld
common:
- type: CapabilityMap
  url: capabilities/google-chat-capability-edges.yml
  name: Google Chat Business Capability Map
- type: Plans
  url: plans/google-chat-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-chat-rate-limits.yml
- type: FinOps
  url: finops/google-chat-finops.yml
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-chat/overview
- type: AgenticAccess
  url: agentic-access/google-chat-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-chat-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-chat-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/googleworkspace
- type: Portal
  url: https://developers.google.com/workspace/chat
- type: GettingStarted
  url: https://developers.google.com/workspace/chat/api/guides
- type: Authentication
  url: https://developers.google.com/identity/protocols/oauth2
- type: Pricing
  url: https://workspace.google.com/pricing
- type: TermsOfService
  url: https://developers.google.com/terms
- type: PrivacyPolicy
  url: https://policies.google.com/privacy
- type: StatusPage
  url: https://www.google.com/appsstatus/dashboard/
- type: Support
  url: https://developers.google.com/workspace/chat/support
- type: Blog
  url: https://workspaceupdates.googleblog.com/
- type: JSONLD
  url: json-ld/json-ld.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: google
x-relationship: product
x-tags-removed:
- Space

Google Chat API — frequently asked questions

Does Google Chat have an API?

Yes. APIs.io lists 7 APIs from Google Chat, including Google Chat Google Chat API, Google Chat Members API and Google Chat Messages API, and 4 more.

Is there an OpenAPI specification for the Google Chat API?

Yes. APIs.io indexes 7 OpenAPI specifications for Google Chat, each linked for download from this page.

How do I authenticate with the Google Chat API?

Google Chat uses bearer-token authentication.

How much does the Google Chat API cost?

Google Chat publishes its prices; its Starter plan is $7 **/ user per month as of 2026-10-28. APIs.io lists 4 pricing plans for Google Chat, with each plan's price, limits and inclusions under Pricing on this page.

Is the Google Chat API ready for AI agents?

Google Chat has a Kin Score of 51.6 out of 100 (developing) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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