MouseCat
MouseCat is an agentic AI infrastructure company for risk operations, founded in 2026 and a graduate of the Y Combinator Winter 2026 batch. The platform runs human-quality fraud investigations to help risk teams automatically detect, investigate, and mitigate emerging fraud, scale investigations, build better models, and make faster decisions. MouseCat deploys entirely within customer-owned cloud environments, integrating with the data, vendors, and APIs a risk team already relies on so companies retain complete control of sensitive data. The company was founded by Nicholas Aldridge (CEO) and Joseph McAllister (CTO) and is backed by Y Combinator, Imagination Capital, and SurgePoint Capital. As of this profile MouseCat is an early-stage startup with a public marketing site and a private application; it publishes no public API, SDK, developer documentation, or MCP server yet.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles MouseCat the way a machine reads it — 1 machine-readable artifact, 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 — MouseCat scores 9.4/100 (minimal), with a separate agent-readiness read of 0/100 (human only). 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 MouseCat
Each block below is one kind of artifact we hold for MouseCat. 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.
Security Posture 1
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.
Resources
Every other property we hold for MouseCat — 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 2
Portal, sign-up, and the first successful call
Access & Security 1
Authentication, authorization, and security posture
Company 4
The organization behind the API
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