# Circle

**Canonical:** https://apis.io/providers/circle-community/  
**Website:** https://circle.so  
**APIs profiled:** 8

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.

## Kin Score — 39.8 / 100 (developing)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.4 from 40.2).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 59.0 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 20.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (8)

- **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.

## Agentic access (1)

- **Circle Community Agentic Access** — 69 operations · 38 acting

## Security (2)

- **Circle Community Authentication** — apiKey/http · 2 schemes
- **Circle Community Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Circle Community Plans Pricing**

## Tags

Community, Creators, Courses, Memberships, Event, Chat, Community Platform

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/circle-community/). Scores are computed from the provider's own public artifacts under a published rubric.