# URSY.art

Open museum artworks, source evidence and verified image packages.

API: https://ursy.art/wp-json/ursy-art/v1/
OpenAPI: https://ursy.art/wp-json/ursy-art/v1/openapi.json
Art MCP: https://ursy.art/wp-json/ursy-art/v1/mcp
Agents: https://ursy.art/agents.json
Developer manifest: https://ursy.art/.well-known/ursy-developer.json
Capabilities: https://ursy.art/.well-known/ursy-capabilities.json
Workflows: https://ursy.art/wp-json/ursy-art/v1/workflows
NICOLA: https://ursy.art/wp-json/nicola/v2/hello
Under the Hood: https://ursy.art/under-the-hood/
Attention data: https://ursy.art/under-the-hood/data.json
Attention declaration: https://ursy.art/.well-known/ursy-machine-attention.json
Local methodology: https://ursy.art/under-the-hood/machine-attention/
Central VME methodology: https://ursy.ad/machine-attention/vme/
Authentication: https://ursy.art/wp-json/ursy-art/v1/openapi.json
Image vocabulary: https://ursy.art/ns/1.0/
Companion JSON Schema: https://ursy.art/schemas/image-companion-v1.json
Estate totals: https://ursy.art/wp-json/ursy-runtime/v1/estate-totals
Sources: https://ursy.art/sources/
Estate directory MCP: https://ursy.art/wp-json/ursy-mcp/v1/mcp

## Access and limits
Public catalogue reads and Art MCP tools are keyless. Private collections, saved briefs, image jobs and account operations require URSY.ID sign-in, a valid local session or supported API credential, and ownership. Read the OpenAPI security requirements; directory discovery grants no private access.
Use bounded pagination and the documented tool input/output limits. Standard curl and Python urllib are intended public clients; an edge-denied response may be HTML rather than the application JSON error contract.
Catalogue counts describe imported holdings; source dates remain attached. Similarity does not establish authenticity or image rights. Sponsorship is separate metadata and never changes data, rankings, rights or utility results.