# Vault12

**Canonical:** https://apis.io/providers/vault12/  
**Website:** https://vault12.com  
**APIs profiled:** 1

Vault12 is a non-custodial crypto asset security company whose Vault12 Guard mobile app backs up wallet seed phrases and private keys using Shamir's Secret Sharing across a decentralized network of appointed Guardians, with designated legacy contacts for crypto inheritance — no cloud storage and no custody of funds. Its developer surface is open source, centered on the Zax NaCl-based cryptographic relay (asynchronous end-to-end-encrypted device-to-device messaging and file exchange), the glow.ts client library, and native Shamir's Secret Sharing implementations, plus RFC 8414 OAuth 2.0 authorization-server metadata published on vault12.com and a public Zax test relay at zt.vault12.com.

## Kin Score — 29.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 29.6).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 33.3 |
| Commercial Clarity | 31.6 |
| Access Clarity | 31.6 |

Regulatory layer — **Payments**: 54.7 (matched via tags).

## Agent readiness — 8.5 (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 | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

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

## APIs (1)

- **Vault12 Zax Cryptographic Relay API** — Open-source NaCl-based cryptographic relay operated as asynchronous "dead drops" for end-to-end-encrypted device-to-device communication. Clients establish anonymous session key...

## Security (2)

- **Vault12 Authentication** — oauth2/session-handshake · 2 schemes
- **Vault12 Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Cryptocurrency, Security, Backup, Inheritance, Wallets, Cryptography, Secret Sharing, Key Management

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/vault12/). Scores are computed from the provider's own public artifacts under a published rubric.