# Alien

**Canonical:** https://apis.io/providers/alien/  
**Website:** https://alien.org/  
**APIs profiled:** 1

Alien is a proof-of-humanity protocol with its own Layer 1 blockchain that verifies users are real, unique humans without storing biometrics, documents, or personal data — retaining only cryptographic proofs, hashes, and Merkle roots via its Continuous Human Verification Protocol (CHVP). For developers, Alien ships Alien SSO: a standard OpenID Connect / OAuth 2.0 identity provider (authorization code + PKCE, DPoP-bound tokens) that lets apps offer "Sign in with Alien ID" so users prove personhood without sharing name or email. It also provides Alien Agent ID (Ed25519 cryptographic identity linking AI agents to a verified human owner), a Mini Apps SDK, Solana wallet-linking attestations, and first-party JavaScript/React/Python SDKs plus a CLI. Backed by Initialized Capital.

## Kin Score — 31.6 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 31.6).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 73.2 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

## Agent readiness — 14.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (1)

- **Alien SSO** — OpenID Connect / OAuth 2.0 identity provider for proof-of-humanity sign-in. Authorization code + PKCE (S256), refresh tokens, optional DPoP (RFC 9449) sender-constrained tokens,...

## MCP servers (1)

- **Alien MCP Server**

## Security (2)

- **Alien Authentication** — oauth2/openIdConnect · 2 schemes
- **Alien Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Crypto, Identity, Authentication, OpenID Connect, Proof of Humanity, Blockchain, Solana, Agents

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