Simility

Simility was a fraud-detection and risk-decisioning company (a "Digital Trust & Safety" adaptive machine-learning platform) founded in 2014 in Palo Alto, California and backed by Accel and Trinity Ventures. PayPal acquired Simility in 2018 and folded its device fingerprinting, behavioral analytics, and real-time fraud-scoring capabilities into PayPal's risk and fraud-management offerings. The standalone Simility product, developer portal, and any public fraud-scoring API have since been retired: as of this enrichment pass the simility.com domain is registered defensively by PayPal (via MarkMonitor / Google Domains nameservers) but publishes no A record, website, mail, or API host. No live public API surface exists to enrich.

Simility is profiled on the APIs.io network. Tagged areas include Company, Ai, Fraud Detection, Risk Management, and Machine Learning.

🌐 Visit website 📡 Source on GitHub

5.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyAiFraud DetectionRisk ManagementMachine LearningPaymentsSecurityAnti-Fraud

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 5.7/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 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

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Resources

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: simility
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/simility.png
name: Simility
description: 'Simility was a fraud-detection and risk-decisioning company (a "Digital Trust & Safety" adaptive machine-learning
  platform) founded in 2014 in Palo Alto, California and backed by Accel and Trinity Ventures. PayPal acquired Simility in
  2018 and folded its device fingerprinting, behavioral analytics, and real-time fraud-scoring capabilities into PayPal''s
  risk and fraud-management offerings. The standalone Simility product, developer portal, and any public fraud-scoring API
  have since been retired: as of this enrichment pass the simility.com domain is registered defensively by PayPal (via MarkMonitor
  / Google Domains nameservers) but publishes no A record, website, mail, or API host. No live public API surface exists to
  enrich.'
url: https://raw.githubusercontent.com/api-evangelist/simility/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- trinity-ventures
x-status: acquired
x-acquired-by: paypal
x-acquired-year: 2018
x-domain-status: held-no-live-site
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Ai
- Fraud Detection
- Risk Management
- Machine Learning
- Payments
- Security
- Anti-Fraud
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://www.simility.com
x-enrichment:
  date: '2026-07-21'
  status: nochange
  artifacts_added: 0
  pass: local-v1
  note: Domain held by PayPal (MarkMonitor) but resolves to no A/MX/TXT record; company acquired by PayPal 2018, no live public
    API surface.