Azure SignalR Service

Azure SignalR Service REST API enables management of real-time web communication services. It supports creating SignalR instances, managing connections, sending messages to clients and groups, and configuring upstream endpoints for serverless real-time messaging.

Azure SignalR Service publishes 3 API contracts indexed on the APIs.io network: Operations API, SignalR API, and General API. Tagged areas include Real-Time, WebSocket, SignalR, Messaging, and Push.

The Azure SignalR Service catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Azure SignalR Service’s developer surface includes engineering blog, CLI, changelog, authentication, developer portal, pricing, documentation, and 39 more developer resources.

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67.6/100 exemplar ▲ 17.4 Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

2 published contracts 2 Agent Skills

Real-Time WebSocket SignalR Messaging Push

What this lets a business do 1

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

Information Technology Management

BC-600

SignalR

PUT /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.SignalRService/signalR/{name}

Kin Score

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

Composite quality — 67.6/100 · exemplar

Contract Quality 8.3 / 19

Developer Ergonomics 9.7 / 15

Access Clarity 11.8 / 15

Operational Transparency 8.2 / 10

Contract Governance 2.0 / 9

Discoverability 6.2 / 8

Regulatory Posture 6.8 / 15

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 26/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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
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
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 44.3 — up to +13.9 composite points
Contract Governance scores 22.0 — up to +9.4 composite points
Developer Ergonomics scores 64.9 — up to +7.0 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/microsoft-azure-signalr/apis.yml: open an issue on github.com/api-evangelist/microsoft-azure-signalr 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 →

Standards implemented 4

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.

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

WebSub

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 3

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

Azure SignalR Service Operations API

Operations operations

Azure SignalR Service SignalR API

SignalR operations

Azure SignalR Service General API

The general API from Azure SignalR Service — 1 operation(s) for general.

Open Collections 3

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

Azure SignalR Service REST Operations API

OPEN COLLECTION

Azure Service REST Operations SignalR API

OPEN COLLECTION

Azure SignalR Service REST API

OPEN COLLECTION

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

provision-signalr-instance

AGENT SKILL

send-signalr-messages

AGENT SKILL

Azure SignalR Service API pricing

Prices published by Azure SignalR Service, read 2026-09-20 from azure.microsoft.com/en-us/pricing/details/signalr-service/. A free plan or tier is listed.

Plan	Price
Free	Free Includes: Concurrent Connections per Unit 20; Messages/Unit/Day 20,000; Max Units 1
Standard	$- Includes: 1,000 concurrent connections per unit; unlimited messages (free for the first 1,000,000 messages); M
Premium	$- Includes: 1,000 concurrent connections per unit; unlimited messages (free for the first 1,000,000 messages); M

Plan details, limits and sources →

Rate limits

Concurrent connections per unit (Free): Concurrent connections per unit for Free tier
Concurrent connections per unit (Standard/Premium): Concurrent connections per unit for Standard/Premium tier
Included messages per unit per day (Free): Included messages per unit per day for Free tier

All 8 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Microsoft Azure Signalr Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Microsoft Azure Signalr Rate Limits

8 limits

RATE LIMITS

Service Levels 1

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

Azure SignalR Service

SLA

FinOps 1

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

Microsoft Azure Signalr Finops

FINOPS

Semantic Vocabularies 1

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

Microsoft Azure Signalr Context

3 classes · 6 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Azure SignalR Service API Rules

39 rules · 34 errors 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

OperationList

2 properties

JSON SCHEMA

Security Posture 4

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

Microsoft Azure Signalr Authentication

oauth2 · 1 scheme

SECURITY

Microsoft Azure Signalr Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Microsoft Azure Signalr Vulnerability Disclosure

security.txt · contact published

SECURITY

Microsoft Azure Signalr Trust Center

GDPR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Microsoft Azure Signalr Scopes

1 scope · implicit

1 scopes

SCOPES

Agentic Access 1

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

Microsoft Azure Signalr Agentic Access

7 operations · 3 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

WellKnown

AgenticAccess

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

Lifecycle

ErrorCatalog

Conformance

Scroll for all 9

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 8

Authentication, authorization, and security posture

Compliance

SecurityTxt

Security

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Scroll for all 8

Operate 7

Status, limits, changes, and where to get help

ChangeLog

Deprecation

ChangeLog

RateLimits

StatusPage

Support

StackOverflow

Scroll for all 7

Commercial 5

Pricing, plans, and the legal terms of use

FinOps

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 4

Properties that don't map to a standard resource type

Hosts

Vendors

Leadership

CapabilityMap

Source (apis.yml)

aid: microsoft-azure-signalr
url: https://learn.microsoft.com/en-us/azure/azure-signalr/
name: Azure SignalR Service
x-parent: microsoft-azure
description: Azure SignalR Service REST API enables management of real-time web communication services. It supports creating
  SignalR instances, managing connections, sending messages to clients and groups, and configuring upstream endpoints for
  serverless real-time messaging.
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/microsoft-azure-signalr.png
tags:
- Real-Time
- WebSocket
- SignalR
- Messaging
- Push
tags_raw:
- Real-Time
- WebSockets
- SignalR
- Messaging
- Push
created: '2026-03-13'
modified: '2026-09-16'
specificationVersion: '0.23'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: Blog
  url: https://techcommunity.microsoft.com/category/windows/blog/windows-itpro-blog
- type: Spectral
  url: rules/microsoft-azure-signalr-rules.yml
- type: JSONLD
  url: json-ld/microsoft-azure-signalr-context.jsonld
- type: Vocabulary
  url: vocabulary/microsoft-azure-signalr-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/microsoft-azure-signalr-data-model.yml
- type: CLI
  url: cli/microsoft-azure-signalr-cli.yml
- type: ChangeLog
  url: changelog/microsoft-azure-signalr-changelog.yml
- type: Idempotency
  url: conventions/microsoft-azure-signalr-conventions.yml
- type: Conventions
  url: conventions/microsoft-azure-signalr-conventions.yml
- type: Compliance
  url: https://www.microsoft.com/en-us/trust-center
- type: Deprecation
  url: https://learn.microsoft.com/en-us/azure/azure-signalr/signalr-reference-data-plane-rest-api
- type: Lifecycle
  url: lifecycle/microsoft-azure-signalr-lifecycle.yml
- type: ErrorCatalog
  url: errors/microsoft-azure-signalr-problem-types.yml
- type: Conformance
  url: conformance/microsoft-azure-signalr-conformance.yml
- type: LLMsTxt
  url: llms/microsoft-azure-signalr-llms.txt
- type: SecurityTxt
  url: well-known/microsoft-azure-signalr-security.txt
- type: WellKnown
  url: well-known/microsoft-azure-signalr-well-known.yml
- type: Hosts
  url: hosts/microsoft-azure-signalr-hosts.yml
- type: Vendors
  url: vendors/microsoft-azure-signalr-vendors.yml
- type: SDKs
  url: packages/microsoft-azure-signalr-packages.yml
- type: Packages
  url: packages/microsoft-azure-signalr-packages.yml
- type: Security
  url: https://techcommunity.microsoft.com/tag/security
- type: Leadership
  url: https://news.microsoft.com/leadership
- type: ChangeLog
  url: https://developer.microsoft.com/en-us/changelog
- type: TrustCenter
  url: security/microsoft-azure-signalr-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/microsoft-azure-signalr-vulnerability-disclosure.yml
- type: RateLimits
  url: rate-limits/microsoft-azure-signalr-rate-limits.yml
- type: FinOps
  url: finops/microsoft-azure-signalr-finops.yml
- type: Plans
  url: plans/microsoft-azure-signalr-plans-pricing.yml
- type: Website
  url: https://microsoft.com
- type: CapabilityMap
  url: capabilities/microsoft-azure-signalr-capability-edges.yml
  name: Azure SignalR Service Business Capability Map
- type: AgenticAccess
  url: agentic-access/microsoft-azure-signalr-agentic-access.yml
- type: DomainSecurity
  url: security/microsoft-azure-signalr-domain-security.yml
- type: Authentication
  url: authentication/microsoft-azure-signalr-authentication.yml
- type: OAuthScopes
  url: scopes/microsoft-azure-signalr-scopes.yml
- type: GitHubOrganization
  url: https://github.com/Azure
- type: Portal
  url: https://portal.azure.com/
- type: Pricing
  url: https://azure.microsoft.com/en-us/pricing/details/signalr-service/
- type: Documentation
  url: https://learn.microsoft.com/en-us/azure/azure-signalr/
- type: GettingStarted
  url: https://learn.microsoft.com/en-us/azure/azure-signalr/signalr-quickstart-azure-signalr-service-arm-template
- type: StatusPage
  url: https://azure.status.microsoft/en-us/status
- type: TermsOfService
  url: https://www.microsoft.com/en-us/legal/terms-of-use
- type: PrivacyPolicy
  url: https://privacy.microsoft.com/en-us/privacystatement
- type: Support
  url: https://support.microsoft.com/
- type: StackOverflow
  url: https://stackoverflow.com/questions/tagged/azure-signalr
apis:
- aid: microsoft-azure-signalr:microsoft-azure-signalr-operations-api
  name: Azure SignalR Service Operations API
  description: Operations operations
  humanURL: https://learn.microsoft.com/en-us/rest/api/signalr/
  baseURL: https://management.azure.com/
  tags: []
  tags_raw:
  - Operations
  properties:
  - type: OpenAPI
    url: openapi/microsoft-azure-signalr-operations-api-openapi.yml
  - type: Documentation
    url: https://learn.microsoft.com/en-us/rest/api/signalr/
  - type: Authentication
    url: https://learn.microsoft.com/en-us/azure/active-directory/develop/authentication-flows-app-scenarios
  - type: JSONSchema
    url: json-schema/microsoft-azure-signalr-operation-list-schema.json
- aid: microsoft-azure-signalr:microsoft-azure-signalr-signalr-api
  name: Azure SignalR Service SignalR API
  description: SignalR operations
  humanURL: https://learn.microsoft.com/en-us/rest/api/signalr/
  baseURL: https://management.azure.com/
  tags:
  - SignalR
  properties:
  - type: OpenAPI
    url: openapi/microsoft-azure-signalr-signalr-api-openapi.yml
  - type: OpenAPI
    name: OpenAPI (provider-hosted)
    url: https://raw.githubusercontent.com/Azure/azure-rest-api-specs/main/specification/signalr/resource-manager/Microsoft.SignalRService/SignalRService/stable/2024-03-01/signalr.json
  - type: Documentation
    url: https://learn.microsoft.com/en-us/rest/api/signalr/
  - type: Authentication
    url: https://learn.microsoft.com/en-us/azure/active-directory/develop/authentication-flows-app-scenarios
- aid: microsoft-azure-signalr:microsoft-azure-signalr-general-api
  name: Azure SignalR Service General API
  description: The general API from Azure SignalR Service — 1 operation(s) for general.
  humanURL: https://learn.microsoft.com/en-us/rest/api/signalr/
  baseURL: https://management.azure.com/
  tags: []
  tags_raw:
  - general
  properties:
  - type: OpenAPI
    url: openapi/microsoft-azure-signalr-general-api-openapi.yml
  - type: Documentation
    url: https://learn.microsoft.com/en-us/azure/azure-signalr/signalr-reference-data-plane-rest-api
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 8
  pass: local-v6

Azure SignalR Service API — frequently asked questions

Does Azure SignalR Service have an API?

Yes. APIs.io lists 3 APIs from Azure SignalR Service, including Azure SignalR Service Operations API, Azure SignalR Service SignalR API and Azure SignalR Service General API.

Is there an OpenAPI specification for the Azure SignalR Service API?

Yes. APIs.io indexes 3 OpenAPI specifications for Azure SignalR Service, each linked for download from this page.

How do I authenticate with the Azure SignalR Service API?

Azure SignalR Service uses bearer-token authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Microsoft Azure Signalr Authentication.

How much does the Azure SignalR Service API cost?

Azure SignalR Service publishes its prices; its Standard plan is $- as of 2026-09-20. APIs.io lists 3 pricing plans for Azure SignalR Service, with each plan's price, limits and inclusions under Pricing on this page.

Is the Azure SignalR Service API ready for AI agents?

Azure SignalR Service has a Kin Score of 67.6 out of 100 (exemplar) and an Agent Readiness score of 26.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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