# Perseus

**Canonical:** https://apis.io/providers/perseus/  
**Website:** https://perseus.computer  
**APIs profiled:** 0

Perseus (legal name Efficient Systems Inc.) is an applied AI lab focused on semantic search in latent spaces, founded by Samrath Chadha and backed by Y Combinator (Fall 2025 batch). Its first product is a retrieval engine that grounds coding agents in real code: developers and agents describe the code they are looking for in plain English and Perseus returns ranked file:line results with snippets in seconds, indexing the working tree (including uncommitted edits) so models like Claude Code, Cursor, and Codex can find the right context before editing. Rather than a public REST API, Perseus ships a first-party CLI (installed via a curl/PowerShell one-liner, as a PyInstaller binary or uv wheel), a provider-published Agent Skill, and a Factory Droid plugin, all under the efficientsystemsinc GitHub organization. The developer surface — docs, console, pricing, and blog — is live; there is no OpenAPI, MCP server, or /.well-known discovery document published as of this pass.

## Kin Score — 22.9 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 22.9).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 64.3 |
| Commercial Clarity | 23.7 |
| Access Clarity | 23.7 |

## Agent readiness — 12.8 (agent-aware)

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

## Access

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

## Security (2)

- **Perseus Authentication** — token · 1 scheme
- **Perseus Domain Security** — TLSv1.3

## Tags

Company, Artificial Intelligence, Developer Tools, Code Search, Semantic Search, Coding Agents, AI Agents, Latent Space, CLI, Agent Skills, Y Combinator

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