API & MCP

Everything a person can do on PBR Texture Set Export (glTF, Unreal, Unity), a program or AI agent can do with the same inputs and get the identical result.

HTTP API

POST https://renderloompbrexport.usefulweb.app/api/v1/calculate – run PBR Texture Set Export (glTF, Unreal, Unity)
GET https://renderloompbrexport.usefulweb.app/api/v1/tool – inputs, output schema, examples
OpenAPI 3.1: /openapi.json · /openapi.yaml
Errors: application/problem+json; 422 includes per-field errors.

PBR Texture Set Export (glTF, Unreal, Unity)

Render a Material Nodes preset or your own graph at up to 1024 px and download a ZIP named for your engine: base color, normal in the right Y convention, a packed ORM or HDRP mask map, separate roughness, metallic and occlusion maps, 8- and 16-bit height, the editable graph and a manifest that lists channels and color spaces.

Inputs of PBR Texture Set Export (glTF, Unreal, Unity)
Field	Type	Default	Description
`preset`	select (brick, wood, stone, metal, fabric, custom)	"brick"	Material graph
`graph`	textarea	—	Graph JSON (for a custom graph). Format renderloom-material-graph version 1 (schema at /static/apps/renderloom/material-graph.schema.json). Copy it from Renderloom → Material Nodes.
`size`	integer	512	Texture size (px)
`seed`	integer	-1	Graph seed (−1 keeps the graph’s seed)
`convention`	select (gltf, unreal, unity-hdrp)	"gltf"	Target engine
`height16`	boolean	true	Include a 16-bit height PNG

Example request

Oak planks for glTF and Blender

curl -X POST https://renderloompbrexport.usefulweb.app/api/v1/calculate -H 'content-type: application/json' -d '{"preset":"wood","size":256}'

Every result contains

inputs (normalised, defaults applied), summary, result (validated against the published schema), units, assumptions, sources, warnings, computedAt and links.

MCP (Model Context Protocol)

Streamable HTTP endpoint: https://renderloompbrexport.usefulweb.app/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
Tools: renderloom_pbr_export
Local stdio connector: node src/mcp-stdio.ts --tool=renderloom-pbr-export

{
  "mcpServers": {
    "renderloom-pbr-export": { "type": "http", "url": "https://renderloompbrexport.usefulweb.app/mcp" }
  }
}