OVB3 — Oracle Visual Builder Bridge

OVB3 = Oracle Visual Builder + 3 (a nod to Thrishul — त्रिशूल, trident) + Bridge.

MCP server + CLI for driving Oracle Visual Builder Studio (VBS) / Visual Builder Cloud Service (VBCS) app development from Claude — reading/writing VBCS artifacts, running Oracle's build/audit tasks, and (once a live dev instance is available) driving VB Studio's CI/CD REST API.

This favors artifact/git-based automation (editing the JSON/JS files VB Studio projects are made of, then using git + Oracle's own grunt-vb-* tasks) over browser automation of the VB Studio design-time UI, which has no documented public API and is brittle to script.

The toolkit targets a whole VBS instance, not one hardcoded app: an instance hosts multiple VB Studio projects (each its own git repo), and each repo can hold multiple VBCS web apps under webApps/. Every tool takes the repo and app as arguments; nothing is wired to a single project.

Install

git clone https://github.com/vanamthrishul/ovb3-bridge.git
cd ovb3-bridge        # or whatever local folder name you cloned it into — that's cosmetic
npm install          # also compiles TypeScript into dist/ (via the "prepare" script)
npm run cli -- init   # guided setup — see below
npm test              # optional sanity check — should be all green

That's the whole install. There's no npm-registry package and deliberately no "one-line npx install" — this tool holds real per-machine state (your .env credentials, and local checkouts of VBS repos under VBS_WORKSPACE_DIR), so a stable clone is the right model, not an ephemeral npx run. Clone it once to wherever you keep dev tools, configure it there, and point any Claude Code project's .mcp.json at that one stable checkout (see below).

ovb3 init — guided setup

npm run cli -- init (or just ovb3 init once installed on your PATH) walks you through linking either a VB Studio project or a standalone VBCS instance, and writes the relevant non-secret fields into .env for you (creating it from .env.example first if it doesn't exist yet). This is the CLI-native equivalent of the /link slash command below — same rules, same fields, just usable without Claude Code. Like /link, it never asks for or writes credentials; those are always yours to fill into .env directly.

Using it in Claude Code

This repo already has .mcp.json + .claude/commands/vbs-*.md committed, so opening this folder in Claude Code and starting a new session picks up both automatically (MCP servers and commands are loaded at session start — restart/reload if you had a session open before installing).

Any other project: add an entry to that project's own .mcp.json pointing at this checkout's absolute path:

{
  "mcpServers": {
    "vbcs": {
      "type": "stdio",
      "command": "node",
      "args": ["/absolute/path/to/ovb3-bridge/dist/server.js"]
    }
  }
}

Then copy .claude/commands/vbs-*.md from this repo into that project's .claude/commands/ if you want the /vbs-* shortcuts there too.

The MCP server key (vbcs) and the /vbs-* command prefix are left as-is after the OVB3 rename on purpose — they name the domain (VB Studio/VBCS), not the project brand, so they don't need to track whatever this repo is called.

Related MCP server: workday-studio-mcp

Using it — quick tour

Start with /link — a guided setup that asks whether you're connecting to a VB Studio project (git-backed) or a standalone VBCS instance (REST-only, no git remote), collects the details, and writes the relevant non-secret .env vars for you. Secrets (git tokens, IDCS password) are never asked for or written by /link — you fill those into .env yourself, as always. (Not using Claude Code? ovb3 init from a terminal does the same thing — see above.)

Once linked, use /vbs-* commands for a VB Studio-backed project, or /vbcs-* commands for a standalone VBCS instance:

<repo> is either the exact folder name under VBS_WORKSPACE_DIR, an absolute path, or -/omitted to use the VBCS_REPO_PATH default.

For a standalone VBCS instance (no VB Studio project, no git remote — see /vbcs-help for the always-current, self-generated list):

These call the standalone VBCS REST API directly (VBCS_BASE_URL in .env), not a git repo — there's no /vbcs-read//vbcs-write equivalent because Oracle doesn't expose page/flow CRUD over REST for standalone instances, only the operations above plus data import (still stubbed — see Status).

Typical first run:

/vbs-list-repos                              # see what's checked out
/vbs-list-apps my-vbs-project                # see the apps inside it
/vbs-read my-vbs-project webApps/myApp/flows/main/main-flow.json

You don't have to use the slash commands — plain requests like "read the order-entry page flow in myApp" work too, since they resolve to the same underlying MCP tools. The commands just save you from typing that out every time.

.env

See .env.example for the full list. Key ones:

• VBS_WORKSPACE_DIR — a local directory containing checkouts of one or more VB Studio project repos. list_repos / list_apps discover what's available under here.

• VBCS_REPO_PATH / VBCS_APP_NAME — optional single-repo/app defaults, for when a tool call doesn't specify one explicitly.

• VBSTUDIO_GIT_* — git remote + auth for commit/push/pull helpers.

• IDCS_* / VBSTUDIO_API_BASE_URL — VB Studio's own REST API auth (builds, pipelines, issues). Leave blank for now; the vbstudio_* tools are stubs — no live VB Studio instance access has been confirmed for this API yet, so its endpoint shapes aren't wired up (see "Status" below).

• VBCS_BASE_URL / VBCS_IDCS_USERNAME / VBCS_IDCS_PASSWORD — a standalone VBCS instance's own REST API (different product/auth from VB Studio's). VBCS_BASE_URL is normally set by /link; the two credential vars are always yours to fill in directly.

Checking out a VBS repo to work against

# clone target repos into the workspace dir (uses VBSTUDIO_GIT_TOKEN from .env)
git clone https://<username>@<your-vb-studio-host>/.../scm/<repo>.git workspace/<repo-name>

Then /vbs-list-repos / /vbs-list-apps will pick it up immediately — no toolkit restart needed, since discovery reads the filesystem live.

grunt-vb-build / grunt-vb-audit

These are Oracle-provided npm packages distributed via a private Oracle CDN tarball feed, not public npm. Install them into whichever VB Studio repo checkout you're building/auditing (not into this toolkit's own node_modules) — follow Oracle's own install steps for those packages in whichever VB Studio project you're working against. run_build / run_audit shell out to npx grunt vb-build / npx grunt vb-audit inside that repo; the exact task flags are TODO-marked in src/tools/build.ts pending confirmation against a real Gruntfile.

Running the MCP server or CLI directly

npm run build && npm start   # MCP server over stdio
npm run dev                  # MCP server, dev mode (tsx, no build step)
npm run cli -- init          # guided setup (see above)
npm run cli -- list-repos    # CLI, for manual testing without an MCP host
npm run cli -- list-apps <repo>
npm run cli -- read <repo> webApps/myApp/flows/main/main-flow.json
npm run cli -- run-build <repo> myApp
npm run cli -- vbcs-list-apps [filter]              # standalone VBCS instance (VBCS_BASE_URL)
npm run cli -- vbcs-lock-app <branchId>
npm run cli -- vbcs-unlock-app <branchId>
npm run cli -- vbcs-export-data <appName> <appVersion> <boName>

Every tool call — whether through MCP or the CLI — is logged to stderr: path/repo/app touched, git operations, and live-streamed stdout/stderr for build/audit runs. Nothing happens silently.

Status

Scaffolded and verified against a real cloned VBS project repo: discovery, artifact read, glob listing, and git status all confirmed working against live data.

Standalone VBCS REST API (/vbcs-* commands, src/tools/vbcs-api.ts): list applications, lock/unlock, and export business-object data are implemented against endpoint shapes confirmed from Oracle's published docs, and have been exercised and confirmed working against a real live instance — including the token response and applist response shapes. Import business-object data and credential management are deliberately left stubbed/unbuilt (unpublished request shapes / not needed yet).

VB Studio's own REST API (vbstudio_* tools — a separate product/integration from standalone VBCS above, different base URL and auth) is still fully stubbed: no live VB Studio instance access has been confirmed for it, so its endpoint shapes are deliberately not guessed at.

This folder is the ongoing development home for the toolkit — new tools and fixes land here and get pushed up, not maintained as a separate release artifact.