# Etch

**Canonical:** https://apis.io/providers/etch-systems/  
**Website:** https://etch.systems/  
**APIs profiled:** 1

Etch provides a signed audit chain for AI agent decisions, enabling offline verification of events against pinned public keys. It uses a hybrid Ed25519 + FIPS 205 SLH-DSA-SHA2-128f envelope, Merkle chaining, and anchors epochs on Sigstore Rekor and Bitcoin OpenTimestamps, offering independent evidence without trusting the vendor.

## Kin Score — 38.7 / 100 (thin)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 76.8 |
| Contract Quality | 42.6 |
| Contract Governance | 22.0 |
| Operational Transparency | 9.5 |
| Developer Ergonomics | 21.4 |
| Access Clarity | 57.4 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 20.0 (matched via fallback).

## Agent readiness — 20.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | documented |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

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

## APIs (4)

- **Etch Auditor API** — Public verification surface: pinnable public keys, OSS-format manifest, browser chain-integrity endpoint.
- **Etch Discovery API** — Well-known metadata endpoints for aggregators and MCP clients.
- **Etch Onboarding API** — Zero-signup path to a signed audit chain.
- **Etch Portable identity API** — Track B v1.0+v1.1 portable per-agent identity: mint, session, rotate, grant/revoke, delegated write.

## Agentic access (1)

- **Etch Agentic Access** — 12 operations · 6 acting · 1 human-in-the-loop

## Security (3)

- **Etch Domain Security** — TLSv1.3 · HSTS · DMARC
- **Etch Vulnerability Disclosure** — security.txt · contact published
- **Etch Trust Center** — SOC 2, HIPAA

## Plans (1)

- **Etch Plans Pricing**

## Tags

Artificial Intelligence, Security, Auditing, Blockchain, Open Source, Company

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