# Etch Portable identity API

**Canonical:** https://apis.io/apis/etch-systems/etch-systems-portable-identity-api/  
**Provider:** Etch — https://apis.io/providers/etch-systems/  
**Base URL:** https://etch.systems  
**Documentation:** https://etch.systems/docs

Etch Portable identity API is one of 4 APIs that [Etch](https://apis.io/providers/etch-systems/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Portable identity. The published artifact set on APIs.io includes an OpenAPI specification.

Track B v1.0+v1.1 portable per-agent identity: mint, session, rotate, grant/revoke, delegated write.

## Operations (5)

| Method | Path | Summary |
|---|---|---|
| POST | `/v1/identity/session` | Idempotent-per-identity mint or attach; portable-identity clients bind to a… |
| POST | `/v1/identity/rotate` | Rotate a portable identity's keypair; the OLD key's signature IS the… |
| POST | `/v1/identity/grant` | Delegate authority to another identity; grantor signature IS the authorization |
| POST | `/v1/identity/revoke-grant` | Revoke a delegation grant; grantor signature IS the authorization; idempotent |
| POST | `/v1/identity/delegated-write` | Append a chain row on behalf of a grantor; grantee signature verifies; grant… |

## Machine-readable artifacts (1)

- **OpenAPI** — https://artifacts.apis.io/etch-systems/openapi/etch-systems-portable-identity-api-openapi.yml

## Other Etch APIs (3)

- [Etch Auditor API](https://apis.io/apis/etch-systems/etch-systems-auditor-api/)
- [Etch Discovery API](https://apis.io/apis/etch-systems/etch-systems-discovery-api/)
- [Etch Onboarding API](https://apis.io/apis/etch-systems/etch-systems-onboarding-api/)

## Tags

Portable identity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/etch-systems/etch-systems-portable-identity-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/etch-systems/.