Mosey
Mosey is a business compliance platform that helps multi-state companies open and manage state and local tax, HR, payroll, insurance, and registration accounts. The Mosey API is a composable set of OpenAPI 3.1 endpoints that let software platforms embed state compliance into their own products: sign up or authenticate a legal entity, register the states it operates in, generate and resolve compliance tasks, receive physical mail, and securely manage state-agency logins via short-lived hosted sessions. Authentication is OAuth2 (password grant). Mosey partnered with Gusto, Stripe, and Sequoia Consulting Group and was subsequently acquired by Gusto. This profile was surfaced as a Canaan Partners portfolio company and enriched by the API Evangelist pipeline from Mosey's public OpenAPI and developer documentation.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Mosey the way a machine reads it — 16 machine-readable artifacts across 12 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 — Mosey scores 41.9/100 (thin), with a separate agent-readiness read of 65/100 (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 Mosey
Each block below is one kind of artifact we hold for Mosey. 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 12
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.
Mosey Accounts API
The Accounts API from Mosey — 7 operation(s) for accounts.
Mosey Agency Accounts API
The Agency Accounts API from Mosey — 2 operation(s) for agency accounts.
Mosey Auth API
The Auth API from Mosey — 2 operation(s) for auth.
Mosey Documents API
The Documents API from Mosey — 1 operation(s) for documents.
Mosey Handbook API
The Handbook API from Mosey — 3 operation(s) for handbook.
Mosey Legal Entity API
The Legal Entity API from Mosey — 2 operation(s) for legal entity.
Mosey Locations API
The Locations API from Mosey — 7 operation(s) for locations.
Mosey Logins API
The Logins API from Mosey — 4 operation(s) for logins.
Mosey Mail API
The Mail API from Mosey — 2 operation(s) for mail.
Mosey Regions API
The Regions API from Mosey — 2 operation(s) for regions.
Mosey Signup API
The Signup API from Mosey — 3 operation(s) for signup.
Mosey Tasks API
The Tasks API from Mosey — 9 operation(s) for tasks.
Scroll within the panel for all 12 ·
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.
mosey-mcp.yml
MCP SERVERSecurity Posture 2
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 Mosey — 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
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Access & Security 2
Authentication, authorization, and security posture
Commercial 3
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type
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