FusionAuth
FusionAuth is a developer-focused customer identity and access management (CIAM) platform that delivers authentication, authorization, registration, multi-factor authentication, single sign-on, OAuth2 and OpenID Connect, and user management capabilities through a comprehensive REST API and self-hostable identity service.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles FusionAuth the way a machine reads it — 60 machine-readable artifacts across 37 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — FusionAuth scores 52.4/100 (developing), with a separate agent-readiness read of 64/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile FusionAuth
Each block below is one kind of artifact we hold for FusionAuth. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 37
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
FusionAuth Api Key API
The Api Key API from FusionAuth — 2 operation(s) for api key.
FusionAuth Application API
The Application API from FusionAuth — 8 operation(s) for application.
FusionAuth Connector API
The Connector API from FusionAuth — 2 operation(s) for connector.
FusionAuth Consent API
The Consent API from FusionAuth — 3 operation(s) for consent.
FusionAuth Email API
The Email API from FusionAuth — 5 operation(s) for email.
FusionAuth Entity API
The Entity API from FusionAuth — 10 operation(s) for entity.
FusionAuth Form API
The Form API from FusionAuth — 4 operation(s) for form.
FusionAuth Group API
The Group API from FusionAuth — 5 operation(s) for group.
FusionAuth Health API
The Health API from FusionAuth — 1 operation(s) for health.
FusionAuth Identity API
The Identity API from FusionAuth — 4 operation(s) for identity.
FusionAuth Identity Provider API
The Identity Provider API from FusionAuth — 9 operation(s) for identity provider.
FusionAuth Integration API
The Integration API from FusionAuth — 1 operation(s) for integration.
FusionAuth Ip Acl API
The Ip Acl API from FusionAuth — 4 operation(s) for ip acl.
FusionAuth Jwt API
The Jwt API from FusionAuth — 7 operation(s) for jwt.
FusionAuth Key API
The Key API from FusionAuth — 7 operation(s) for key.
FusionAuth Lambda API
The Lambda API from FusionAuth — 3 operation(s) for lambda.
FusionAuth Login API
The Login API from FusionAuth — 2 operation(s) for login.
FusionAuth Logout API
The Logout API from FusionAuth — 1 operation(s) for logout.
FusionAuth Message API
The Message API from FusionAuth — 3 operation(s) for message.
FusionAuth Messenger API
The Messenger API from FusionAuth — 2 operation(s) for messenger.
FusionAuth Oauth2 API
The Oauth2 API from FusionAuth — 7 operation(s) for oauth2.
FusionAuth Passwordless API
The Passwordless API from FusionAuth — 3 operation(s) for passwordless.
FusionAuth Reactor API
The Reactor API from FusionAuth — 2 operation(s) for reactor.
FusionAuth Report API
The Report API from FusionAuth — 5 operation(s) for report.
FusionAuth Status API
The Status API from FusionAuth — 1 operation(s) for status.
FusionAuth System API
The System API from FusionAuth — 11 operation(s) for system.
FusionAuth System Configuration API
The System Configuration API from FusionAuth — 1 operation(s) for system configuration.
FusionAuth Tenant API
The Tenant API from FusionAuth — 5 operation(s) for tenant.
FusionAuth Tenant Manager API
The Tenant Manager API from FusionAuth — 2 operation(s) for tenant manager.
FusionAuth Theme API
The Theme API from FusionAuth — 3 operation(s) for theme.
FusionAuth Two Factor API
The Two Factor API from FusionAuth — 7 operation(s) for two factor.
FusionAuth User Action API
The User Action API from FusionAuth — 2 operation(s) for user action.
FusionAuth User Action Reason API
The User Action Reason API from FusionAuth — 2 operation(s) for user action reason.
FusionAuth User API
The User API from FusionAuth — 29 operation(s) for user.
FusionAuth Webauthn API
The Webauthn API from FusionAuth — 8 operation(s) for webauthn.
FusionAuth Webhook API
The Webhook API from FusionAuth — 3 operation(s) for webhook.
FusionAuth .well Known API
The .well Known API from FusionAuth — 2 operation(s) for .well known.
Scroll within the panel for all 37 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
MCP Server
MCP SERVERAgent Skills 14
An agent skill packages the how-to for driving these APIs from an assistant — the prompts, the sequence, the guardrails — so the knowledge to use the API travels with it.
Packaged agent skills for driving this provider's APIs from an AI assistant.
chargebee-webhooks
AGENT SKILLclerk-webhooks
AGENT SKILLdeepgram-webhooks
AGENT SKILLelevenlabs-webhooks
AGENT SKILLfusionauth-webhooks
AGENT SKILLgithub-webhooks
AGENT SKILLhookdeck-event-gateway
AGENT SKILLopenai-webhooks
AGENT SKILLpaddle-webhooks
AGENT SKILLresend-webhooks
AGENT SKILLsendgrid-webhooks
AGENT SKILLshopify-webhooks
AGENT SKILLstripe-webhooks
AGENT SKILLwebhook-handler-patterns
AGENT SKILLScroll within the panel for all 14 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Fusionauth Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Fusionauth Finops
FINOPSSecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for FusionAuth — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 3
Portal, sign-up, and the first successful call
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/fusionauth · machine-readable index on apis.io