# 41st Parameter

**Canonical:** https://apis.io/providers/41st-parameter/  
**APIs profiled:** 0

The 41st Parameter, Inc. was a device-identification and web-fraud-detection company founded in 2004 and headquartered in Silicon Valley, with offices in Arizona, the UK, and Tokyo. Its device intelligence technology reduced fraud detection false positives for use cases such as new-account fraud, card-not-present (CNP) online transaction risk scoring, and account-takeover protection. Experian acquired the company in October 2013 and folded its device-recognition technology into Experian's global web-fraud and risk-based identity-authentication portfolio (FraudNet). 41st Parameter no longer operates as a standalone entity and publishes no independent developer portal, API, or documentation. This profile was surfaced as a portfolio company of kleiner-perkins and retained in the API Evangelist network as a historical record.

## Kin Score — 5.0 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 5.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Tags

Company, Enterprise, Fraud Detection, Device Intelligence, Web Fraud, Identity Verification, Account Takeover, Acquired

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/41st-parameter/). Scores are computed from the provider's own public artifacts under a published rubric.