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.

MouseCat is profiled on the APIs.io network. Tagged areas include Company, Fraud Detection, Fraud Investigation, Risk Operations, and Artificial Intelligence.

MouseCat’s developer surface includes signup flow and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
9.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyFraud DetectionFraud InvestigationRisk OperationsArtificial IntelligenceAgentic AIFinancial ServicesSecurity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 9.4/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 2.6 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/mousecat: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Mousecat Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login
Login
 SignUp
SignUp

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 4

The organization behind the API

Website
Website
 Crunchbase
Crunchbase
 LinkedIn
LinkedIn
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: mousecat
name: MouseCat
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/mousecat/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://www.mousecat.ai/images/logo_white.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
- imagination-capital
- surgepoint-capital
x-batch: YC W26
x-founders:
- FN: Nicholas Aldridge
  role: Co-Founder & CEO
  url: https://www.linkedin.com/in/nicholas-aldridge/
- FN: Joseph McAllister
  role: Co-Founder & CTO
  url: https://www.linkedin.com/in/joseph-mcallister/
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Fraud Detection
- Fraud Investigation
- Risk Operations
- Artificial Intelligence
- Agentic AI
- Financial Services
- Security
apis: []
common:
- type: DomainSecurity
  url: security/mousecat-domain-security.yml
- type: Website
  url: https://www.mousecat.ai
- type: Login
  url: https://app.mousecat.ai
- type: SignUp
  url: https://www.mousecat.ai/book-demo
- type: Crunchbase
  url: https://www.ycombinator.com/companies/mousecat
- type: LinkedIn
  url: https://www.linkedin.com/company/mousecat
- type: Twitter
  url: https://x.com/mousecat_ai
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io