The Update Framework (TUF) · JSON Structure

Tuf Targets Metadata Structure

JSON structure for The Update Framework targets.json metadata file

Type: Properties: 0

CNCFCloud-NativeGraduatedSecuritySoftware Supply ChainSoftware UpdatesVerification

Tuf Targets Metadata Structure is a JSON Structure definition published by The Update Framework (TUF).

Meta-schema:

JSON Structure

{
  "title": "TUF Targets Metadata Structure",
  "description": "JSON structure for The Update Framework targets.json metadata file",
  "structure": {
    "signed": {
      "_type": "string (const: 'targets')",
      "spec_version": "string (semver)",
      "version": "integer",
      "expires": "string (ISO 8601 date-time UTC)",
      "targets": {
        "<target_path>": {
          "length": "integer (file size in bytes)",
          "hashes": {
            "sha256": "string (hex digest)",
            "sha512": "string (hex digest)"
          },
          "custom": "object (optional application-specific metadata)"
        }
      },
      "delegations": {
        "keys": {
          "<key_id>": {
            "keytype": "string",
            "scheme": "string",
            "keyval": {
              "public": "string"
            }
          }
        },
        "roles": [
          {
            "name": "string (delegated role name)",
            "keyids": ["string"],
            "threshold": "integer",
            "terminating": "boolean",
            "paths": ["string (target path patterns)"]
          }
        ]
      }
    },
    "signatures": [
      {
        "keyid": "string",
        "sig": "string"
      }
    ]
  }
}

Work with this as data

Every JSON Structure here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for json structure

4 MCP tools reach this

find_json_structuresBrowse and filter every JSON Structure in the catalog.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools

Call it yourself

curl for this page

This JSON Structure

curl "https://apis.io/api/v1/json-structures/tuf-targets-metadata-structure"

All json structure

curl "https://apis.io/api/v1/json-structures?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.