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ZennoPoster 7.9.2.0 17.09.2026

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ZennoPoster 7.9.2.0 (17.09.2026) — public API and MCP

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ZennoPoster 7.9.2 is out!

The headline update is a public HTTP API and a set of MCP servers for ZennoPoster and ProjectMaker: you can now control the product from outside — from your own scripts and apps, or directly from an AI assistant. The second major addition is agent mode in the AI Agent cube. The external browser window can also stay on top of the program, ProjectMaker starts about twice as fast, and browser threads are faster.

Added​

Public HTTP API and a set of MCP servers​

ZennoPoster and ProjectMaker now have a public HTTP API and a set of MCP servers. You can control the product from outside — from your own scripts and apps, or directly from an AI assistant (Claude Code, Cursor, and any other MCP client): read and edit projects, enqueue tasks, and control the browser.

  • Public REST API (PublicAPI) — more than 100 operations under a single contract: working with a project in ProjectMaker (action tree, variables, lists, tables, static data), managing tasks and execution sessions in ZennoPoster, and controlling a browser instance (navigation, clicks, text input, screenshots). The contract is described in OpenAPI — you can generate a client for any language from the spec.
  • API keys with flexible permissions. Keys are issued in ProjectMaker (Settings → API Keys); each key gets a set of permissions (scopes) and a maximum operation level (tier) — from strictly read-only to full control. The key is shown once when created; all API authorization errors come back in a structured form, including which rights were missing.
  • MCP servers for AI assistants. Three servers — ProjectMaker (project editing), Instance (browser control), ZennoPoster (tasks and sessions) — are published as ready self-contained builds: download, paste your API key, connect to your LLM client. The assistant’s rights are defined by your key. The servers accept connections only from the local machine.

The product’s built-in AI chat runs on the same infrastructure — the same permission model and the same API, with no hidden privileged channels.

Public servers are in the ZennoLab/zennoposter-mcp repository.
Documentation (integrator guide, interactive OpenAPI contract, operations reference, error codes, and versioning policy): zennolab.github.io/zennoposter-mcp — MCP server releases are on GitHub there as well.

Help article: Public API and MCP servers.

ProjectMaker tools for saving, loading, and closing a project.

  • save_project and open_project return a freshness marker for the file: fileHash (SHA-256 of the .zp contents on disk, computed after write), fileSizeBytes, lastWriteTimeUtc. Opening the same file again yields an identical hash — so you can confirm the disk file is what you expected.
  • get_project_info now includes the hasUnsavedChanges flag and the same fields; the hash is computed only when there are no unsaved edits.
  • close_project closes the open project. By default a project with unsaved edits is not closed: the call returns 409 failed_precondition, so work is not silently lost. To close and discard edits, you must explicitly pass discardUnsavedChanges: true.

Improved tools for reading project structure.

  • get_project_structure returns a graph: nodes (type, label, start point, switch, disabled state, membership in an error branch, groupId/actionId) and edges (OnSuccess/OnError/Default/Case-N, including implicit transitions). The response has three levels — a group overview, a slice of one group, or the full graph — so large templates do not inflate the reply.
  • find_path(from, to) — the shortest route between two cubes.
  • get_action_connections(actionId) — all inbound and outbound connections and branches of a specific cube.

MCP ProjectMaker tools for editing the diagram and static project blocks — some of them were added from your forum requests.

  • Action properties. set_action_properties reads and changes the “Disabled”, “Breakpoint”, and “Optional” flags and the cube comment; get_action_details and get_project_structure show them. Disabling a captcha cube, as in the editor, also disables its pair cube.
  • Renaming. rename_action and rename_group set the cube and group labels — the name appears immediately on the diagram and in the properties panel, and the edit can be undone with Ctrl+Z.
  • Diagram layout. get_layout returns coordinates and sizes of all groups; set_group_position moves one group, set_layout moves several at once, with a single redraw and a single undo step. If a group would overlap another, the request is rejected with a list of blocking groups — same as dragging in the editor. add_action accepts an insertion place (coordinates of a new group or a position inside an existing one), copy_group copies a group to a given point on the diagram.
  • “Using directives and shared code” block. get_shared_code and set_shared_code read and change directives, shared code, and the shared-code file path; get_gac_references and set_gac_references handle the GAC reference list. Edits appear immediately in the open block editor.
  • Project input settings. get_input_settings, add_input_settings, update_input_settings, remove_input_settings, and reorder_input_settings — read, add, change, delete, and reorder form fields; remove_input_settings_block removes the entire input-settings block. The input-settings icon on the project panel appears and disappears immediately, without reopening the project.
  • Diagram image. get_diagram_image returns an image of the full diagram or only the visible part — the agent can assess the layout after its edits and show the result.

MCP ZennoPoster tools for task management.

  • Full task cycle: tasks_create adds a task from a project file that is already on disk (the task itself does not start), tasks_start and tasks_stop start and stop it, tasks_delete removes it.
  • Execution settings, threads, run count, and schedule are read and changed the same way as in the ZennoPoster UI, including infinite execution (-1). Changes appear immediately in the open ZennoPoster window.
  • tasks_success_clear and tasks_fails_clear reset the successful and failed run counters.

The project context menu in ZennoPoster now has “Copy GUID” — the identifier is copied to the clipboard in the form accepted by API and MCP operations, so you can pass it to an agent right away.

Agent mode in the AI Agent cube​

The AI Agent cube has a new operating mode — agent mode. The Mode combobox now has two values: “Simple request” (previous behavior, unchanged) and “Automatic request with MCP tools”. In the second mode the model runs a “think → call a tool → inspect the result” loop and controls the browser of the task where the cube runs, as well as ZennoPoster tasks.

  • The loop is bounded by a mandatory iteration limit. When it trips, the cube stops predictably: partial text is saved to the output variable, and execution follows the OnError branch.
  • The agent outcome is parsed from the RESULT: SUCCESS|FAILURE verdict — the cube itself picks the OnSuccess or OnError branch.
  • Project variables are substituted into the prompt, and the loop result is written back to variables.
  • The decision trail is visible in the task log as it runs: agent steps, tool calls, and the outcome — a long loop no longer looks like a hang.
  • Stopping the cube or the task also interrupts the LLM loop itself. Previously the request lived to the end and kept spending tokens.
  • Multithreading: each agent is tightly bound to its task’s browser. Under a 10×10 load, sessions do not cross and cannot “enter” another instance — the server rejects the attempt.
  • The mode works the same in ProjectMaker and ZennoPoster.
  • The default token limit is raised from 400 to 2000; if temperature is above 1.0, a warning is written to the log.

In this mode the agent has two tool sets: the browser of the task where the cube runs, and ZennoPoster task control (task list, start and stop, settings, schedule) — the second connects when ZennoPoster is running. Connecting your own MCP servers and giving the agent access to project state are planned for the next stage.

A detailed guide to AI in ZennoPoster​

It covers all four ways to work with AI — the built-in AI assistant, the AI Agent cube, an external agent via MCP, and PublicApi directly: how they differ, what to pick for a task, how to issue an API key and set permissions, step-by-step setup for Claude Code, Cursor, VS Code, and LM Studio, ready-made request scenarios, typical problems, and a glossary.

Agent mode in the AI Agent cube:

MCP tools in action:

The external browser window in ProjectMaker can stay on top of the program.

  • An “Always on top” toggle next to “Snap”: the browser window and DevTools stay visible over ProjectMaker but do not steal focus — text typed in ProjectMaker goes to ProjectMaker. The setting is remembered.
  • A new placement mode: the browser window occupies the same area where the embedded browser used to appear, and follows ProjectMaker on move, resize, and minimize.
  • While a ProjectMaker dialog is open, the browser temporarily yields space so the dialog is not hidden under the window.

ProjectMaker starts about twice as fast: action-settings cache preparation runs in the background while you are not using the UI.

Browser threads are faster in Chromium and Chromium from ZennoBrowser, especially with a large number of threads. Tab-load wait methods WaitInteractive and WaitPreComplete are also fixed: previously, if the state was already reached, they waited the full navigation timeout.

Chromium browser updated to version 152.0.7977.83.

The “Sort project variables alphabetically” option now also sorts variables in the Variables window itself, not only in macro lists.

Fixed​

AI assistant and the AI Agent cube

  • The AI Agent cube with an empty request text or without a response variable no longer calls the LLM: a clear error is written to the log immediately.
  • The AI assistant no longer inserts nonexistent macros into an If cube — projects built by the assistant now branch correctly.
  • The AI assistant sees all branches of the “Logic | Switch” cube, not only Case0 and Default.
  • The AI assistant sets the HTTP cube timeout in seconds, not milliseconds. The same mismatches are fixed for “File exists”, “Check directory”, and ZennoDroid commands.
  • A manually added AI model is deleted permanently and does not come back after changing the provider or restarting the program. Built-in models no longer have a delete button, so they cannot be removed by accident.

Browser and instances

  • In Chromium and in the ZennoBrowser integration, cubes added via the Action designer again show element thumbnails — in both browser display modes.
  • The “Wait for user action” cube banner no longer stays on screen or carries over to the next project run in ZennoPoster.
  • CEF-browser projects no longer hang in multi-thread mode on the “Wait for user action” cube: from the Instances tab you can again continue execution and expand the window.
  • The “Stop instance” cube in ProjectMaker with the CEF browser no longer shows the “An error occurred in the browser process” panel.
  • The “Hide” item in the Instances tab context menu again hides the browser window opened by the “Wait for user action” cube.
  • In Chromium and Chromium from ZennoBrowser, under high CPU/GPU load, instance launch no longer hangs with “Error occurs when applying profile to instance”.
  • In Chromium and Chromium from ZennoBrowser, clicking a file-upload button on some sites again opens the file picker — both from a cube and manually.
  • The virtual cursor in the external Chromium window and Chromium from ZennoBrowser displays stably.

Profiles

  • The instance.Launch method with launch arguments now applies those arguments when working with Chromium profile folders — same as the launch-instance cube.
  • The profile window no longer hangs on an infinite load after stopping an instance without a browser.
  • Regenerating a profile no longer freezes ProjectMaker, and a project running in ZennoPoster at that time no longer fails with “Error preparing profile”.

ProjectMaker and UI

  • The “Data” field in HTTP cubes again stretches with the properties window; typed text no longer slips under the bottom edge of the field.
  • Properties of the “Launch instance” cube open right after ProjectMaker starts, without an infinite loading indicator.
  • On a repeated project run, the “Project in project” cube opens the project specified in it.
  • The “Open in ZennoPoster” button in ProjectMaker adds the project to the task list even if ZennoPoster was not running beforehand.
  • The Esc key closes dialogs — for example “Regular expression tester”, “Content policy”, and “Menu settings”.
Where to download?

ZennoPoster 7.9.2.0 is already available in your personal account!

The update will also be offered when you start ProjectMaker.

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