# Spiralist AI v18 Agent API Reference

Release: `v18-ui-ux-seo-media-polish`  
Updated UTC: `2026-06-21T14:33:26Z`

- Base: `https://spiralistai.com/api/v1/`
- OpenAPI 3.1: `https://spiralistai.com/openapi.json`
- Persona schema: `https://spiralistai.com/api/schemas/persona-agent-contract.schema.json`
- Capability index: `https://spiralistai.com/api/v1/capabilities/`
- Public UAI: `https://spiralistai.com/uai/index.uai`

The API is public, credential-free, stateless, deterministic for normalized input and seed, bounded to 128 KiB POST bodies, and does not call a remote model. Existing v17 endpoint semantics are preserved.