Circle

Circle (circle.so) is an all-in-one community platform for creators, coaches, and brands - hosting discussions, courses, events, live streams, memberships, paywalls, and chat under a single branded space. This is the community software company at circle.so, NOT the USDC / stablecoin financial-services company. Circle exposes a documented public developer platform: an admin-authenticated Admin API (V2) for automations, migrations, and bulk administration; a Headless offering (Member API plus Auth API) for embedding Circle features into your own website or app via member-scoped JWT tokens; and a beta ActionCable WebSocket surface for realtime chat and notifications. API access is plan-gated to the Business plan and above.

Circle publishes 8 APIs on the APIs.io network, including Realtime WebSocket API, Admin - Courses API, Admin - Events API, and 5 more. Tagged areas include Community, Creators, Courses, Memberships, and Events.

The Circle catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Circle’s developer surface includes authentication, documentation, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.0/100 developing ▬ flat Agent 32/100 agent aware Full breakdown ↓
scored 2026-08-03 · rubric v0.9

AccessPaidSelf serve

8 APIs

CommunityCreatorsCoursesMembershipsEventsChatCommunity Platform

Kin Score

Kin Score How this is scored →
scored 2026-08-03 · rubric v0.9

Composite quality — 44.0/100 · developing

Contract Quality 15.7 / 25

Developer Ergonomics 3.9 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.1 / 13

Governance 5.0 / 12

Discoverability 7.4 / 10

Agent readiness — 32/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

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 6 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/circle-community: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 8

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

Circle Realtime WebSocket API

Beta ActionCable (Rails) WebSocket surface for realtime chat and notifications, connected at wss://app.circle.so/cable with a member Bearer access token and a whitelisted Origin...

Circle Admin - Courses API

Course sections, lessons, and progress.

Circle Admin - Events API

Events and event attendees.

Circle Admin - Members API

Admin-authenticated community member management.

Circle Admin - Posts API

Posts, comments, and topics.

Circle Admin - Spaces API

Spaces, space groups, and their memberships.

Circle Headless - Auth API

Member JWT token exchange for the Headless Member API.

Circle Headless - Member API

Member-authenticated experience endpoints.

Scroll for all 8

Open Collections 1

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

Circle Developer Platform API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Circle Community Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Circle Community Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Circle Community Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Circle Realtime WebSocket API (Beta)

Circle exposes a documented public WebSocket API for realtime chat and notifications, in beta for customers on the Business plan and above. The transport is ActionCable (Rails' ...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Circle API Rules

8 rules · 1 errors 7 warnings

SPECTRAL

Security Posture 2

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

Circle Community Authentication

apiKey/http · 2 schemes

SECURITY

Circle Community Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Circle Community Agentic Access

69 operations · 38 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: circle-community
url: https://raw.githubusercontent.com/api-evangelist/circle-community/refs/heads/main/apis.yml
name: Circle
kind: company
description: 'Circle (circle.so) is an all-in-one community platform for creators, coaches, and brands - hosting discussions,
  courses, events, live streams, memberships, paywalls, and chat under a single branded space. This is the community software
  company at circle.so, NOT the USDC / stablecoin financial-services company. Circle exposes a documented public developer
  platform: an admin-authenticated Admin API (V2) for automations, migrations, and bulk administration; a Headless offering
  (Member API plus Auth API) for embedding Circle features into your own website or app via member-scoped JWT tokens; and
  a beta ActionCable WebSocket surface for realtime chat and notifications. API access is plan-gated to the Business plan
  and above.'
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/circle-community.png
tags:
- Community
- Creators
- Courses
- Memberships
- Events
- Chat
- Community Platform
created: '2026-07-05'
modified: '2026-07-05'
specificationVersion: '0.19'
apis:
- aid: circle-community:circle-community-realtime-websocket-api
  name: Circle Realtime WebSocket API
  tags:
  - WebSocket
  - Realtime
  - Chat
  - Notifications
  - ActionCable
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://api.circle.so/get-started/websockets-beta
  baseURL: wss://app.circle.so/cable
  properties:
  - url: https://api.circle.so/get-started/websockets-beta
    type: Documentation
  - url: asyncapi/circle-community-asyncapi.yml
    type: AsyncAPI
  description: Beta ActionCable (Rails) WebSocket surface for realtime chat and notifications, connected at wss://app.circle.so/cable
    with a member Bearer access token and a whitelisted Origin header. Exposes a NotificationChannel (new-notification and
    unread-count events) and three chat channels for member-level room updates, room-wide messages, and thread events.
- aid: circle-community:circle-community-admin-courses-api
  name: Circle Admin - Courses API
  description: Course sections, lessons, and progress.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Admin - Courses
  properties:
  - type: OpenAPI
    url: openapi/circle-community-admin-courses-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-admin-events-api
  name: Circle Admin - Events API
  description: Events and event attendees.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Admin - Events
  properties:
  - type: OpenAPI
    url: openapi/circle-community-admin-events-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-admin-members-api
  name: Circle Admin - Members API
  description: Admin-authenticated community member management.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Admin - Members
  properties:
  - type: OpenAPI
    url: openapi/circle-community-admin-members-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-admin-posts-api
  name: Circle Admin - Posts API
  description: Posts, comments, and topics.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Admin - Posts
  properties:
  - type: OpenAPI
    url: openapi/circle-community-admin-posts-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-admin-spaces-api
  name: Circle Admin - Spaces API
  description: Spaces, space groups, and their memberships.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Admin - Spaces
  properties:
  - type: OpenAPI
    url: openapi/circle-community-admin-spaces-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-headless-auth-api
  name: Circle Headless - Auth API
  description: Member JWT token exchange for the Headless Member API.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Headless - Auth
  properties:
  - type: OpenAPI
    url: openapi/circle-community-headless-auth-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
- aid: circle-community:circle-community-headless-member-api
  name: Circle Headless - Member API
  description: Member-authenticated experience endpoints.
  humanURL: https://api.circle.so/apis/admin-api
  baseURL: https://app.circle.so/api/admin/v2
  tags:
  - Headless - Member
  properties:
  - type: OpenAPI
    url: openapi/circle-community-headless-member-api-openapi.yml
  - type: Documentation
    url: https://api.circle.so/apis/admin-api
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Admin+API+V2
  - type: PostmanCollection
    url: collections/circle-community.postman_collection.json
  - type: OpenCollection
    url: collections/circle-community.opencollection.json
  - type: Documentation
    url: https://api.circle.so/apis/headless
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Member+APIs
  - type: Documentation
    url: https://api.circle.so/apis/headless/quick-start
  - type: APIReference
    url: https://api-headless.circle.so/?urls.primaryName=Auth+APIs
common:
- type: AgenticAccess
  url: agentic-access/circle-community-agentic-access.yml
- type: DomainSecurity
  url: security/circle-community-domain-security.yml
- type: Authentication
  url: authentication/circle-community-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/circleco
- type: Website
  url: https://circle.so
- type: Documentation
  url: https://api.circle.so
- type: Plans
  url: plans/circle-community-plans-pricing.yml
- type: RateLimits
  url: rate-limits/circle-community-rate-limits.yml
- type: FinOps
  url: finops/circle-community-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Where this information came from

This is an independent, third-party profile of Circle, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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