Private tools from chat. Connect once.
Server4Agent

Your assistant can ship real tools

Connect Server4Agent once. Ask for a monitor, dashboard, invoice tool, or private workflow. We build it, host it, and hand back a project URL.

Connect your assistant Browse first-build templates
assistant conversation
your AI assistantconnected
Server4Agent connectedprivate by default
  1. youMonitor our top supplier's pricing page and alert me to any changes
  3. Server4Agent is creating a private watcher project
  4. assistantDone. I set a daily check, text alerts, and a hard budget cap.

  5. Pricing watcher ready

    supplier-prices.apps.server4agent.com

    open
    PrivateRuns dailyText alerts
A person working at a laptop in a quiet workspace

For teams who need useful software to keep running after the chat ends.

Private by default

New projects stay closed until you decide to publish.

Budget capped

You set the spend limit. Agents cannot raise it.

Handoff-ready

Every project is a workspace engineers can keep owning.

Start with a working thing

Pick the first tool you want live

The fastest path is a narrow workflow with a clear success state. Start from a template, add your details, and let the build agent ship the first version.

Tool

Invoice maker

Turn client and line-item details into clean, numbered invoices and quotes you can download and send.

Use template
Tool

Cleanup portal

Upload messy CSVs, clean and dedupe rows, map columns, and export a reusable result.

Use template
Monitor

Uptime monitor

Check URLs on a schedule, alert on downtime, and publish a live status page.

Use template
Watcher

Price watch

Watch competitor pricing, job pages, or vendor pages and alert on changes.

Use template
Watcher

Deal watcher

Watch retailers and listings for a category of gear, keep a price history, and alert you the moment a real deal appears.

Use template
Browse all templates

Why we're different

A shipping layer, not another sandbox

Sandbox tools help an agent execute code. Server4Agent is a server for agent projects: it turns the request into an owned project with a workspace, visibility controls, budget caps, and a URL your team can use.

Who writes the code

Sandbox primitive

Your agent. It has to plan and code itself.

Server4Agent

Our build agent. Plans, writes, ships.

Lifespan

Sandbox primitive

Per call. Lives seconds.

Server4Agent

Persistent. Survives between sessions.

Output surface

Sandbox primitive

Piped back through your backend.

Server4Agent

Stable project URL, private by default and public when you choose.

How your agent calls it

Sandbox primitive

Your dev's backend code, per request.

Server4Agent

Describe a goal in plain English, from the dashboard or through an assistant.

Spend control

Sandbox primitive

Per-call only. No tenant model.

Server4Agent

You set the budget cap. Agent can't override it.

GitHub gave devs a repo. We give your team a place to ship. When engineering takes over, they work in the same project. Nothing thrown away.

Compare

Looking for a server for agent workflows?

If you are comparing sandboxes, browser coding agents, and agent infrastructure, these pages explain where Server4Agent fits.

Server4Agent vs E2B

Compare AI sandboxes with persistent servers, MCP tools, project workspaces, live URLs, and capped spend.

Read comparison

Server4Agent vs Daytona

Compare fast sandboxes for running AI code with persistent servers that ship the work to a live URL.

Read comparison

Server4Agent vs Replit Agent

Compare interactive prompt-to-app builders with infrastructure any MCP-compatible assistant can drive.

Read comparison

Server4Agent vs LangChain sandboxes

Compare sandbox backends for agent code execution with persistent server infrastructure for shipped work.

Read comparison

See the full Server4Agent alternatives guide.

Without Server4Agent

  • Ideas stay in chat. Nothing ships to a real URL
  • Projects don't persist between sessions
  • No budget cap you control
  • Engineers can't pick up where automation left off

With Server4Agent

  • Ships real software, not just answers
  • Stable URLs that stay private until you publish
  • Projects persist between sessions, or run on a schedule
  • Your monthly cap; spending stops when you say so
  • Engineers can take over when the work gets serious

For managers

You know the goal. We ship the result.

Founders, PMs, ops leads: describe the outcome you want. No technical setup, no code, no stack decisions. Get something real back and share it with your team.

STEP 01

Describe what you need

"Alert me when pricing changes." "I want a dashboard for this week's sales." Plain English, in the dashboard or through an assistant.

STEP 02

Get a live link back

A working URL your team can open today. Private by default, public when you choose, and stable at apps.server4agent.com.

STEP 03

Hand off when ready

When engineers need to own it, they open the project workspace and keep building on the same files, with full history. Nothing thrown away.

  • Describe what you need in plain English
  • Get a live link you can share today
  • Keep projects private until you choose to publish
  • Set a budget cap. Spending stops when you say so
  • Hand off to engineers when the work gets serious
See how it works

What you get

From answering questions to shipping real things

Whether you start in the dashboard or connect an assistant, the same build agent ships to a live URL.

Persistent. Or disposable. Your call

Pin a project as long-lived for monitors, dashboards, internal tools. Or spin one up for a one-shot, ship the report, clean up, done.

Real URLs, not throwaway previews

Every project has a stable subdomain at apps.server4agent.com. Keep it private while you work, then publish when the team should use it.

You set the cap

Set a monthly budget. Spending stops when you say so, with no surprise charges from a runaway loop.

Continuous, not one-shot

"Check the supplier's prices every morning, redeploy if anything changes." Projects keep running between sessions.

What you can ship

Turn narrow pains into durable tools

Monitors, websites, dashboards, integrations, and internal tools all follow the same path: describe the outcome, let the build agent ship, then keep editing the live project.

/01 · Tool

"Turn client details into a polished invoice"

Generates numbered invoices and quotes as PDFs, with a history of everything you've issued.

see live
/02 · Monitor

"Alert me if our site goes down"

Scheduled checks, failure history, alerts, and a live status page.

see live
/03 · Watcher

"Catch the deal before it sells out"

Tracks retailer and listing prices, keeps a history, and alerts you the moment a real deal drops.

see live
/04 · Watcher

"Tell me when this pricing page changes"

Monitors competitor pricing, job pages, or vendor terms and notifies the team.

see live
/05 · Tool

"Turn messy CSV cleanup into a tool"

Reusable upload, clean, dedupe, map, and export flow at a real URL.

see live
/06 · Dashboard

"I want to see this week's sales at a glance"

A live dashboard pulling your real data, updating automatically.

see live

Want a guided first build?

The five flagship templates are built for first success

Invoice & quote maker, CSV cleanup portal, uptime monitor, price/job watcher, or telescope deal watcher. Each template includes a prompt, setup notes, limitations, success criteria, and a live example you can open.

Browse templates

For developers

Equip your agent, or jump in yourself

Connect any MCP-compatible assistant, delegate builds with a single goal, and take over the live workspace whenever you want control.

Connect your agent

Add Server4Agent to any MCP-compatible assistant. One config line. Your agent delegates goals to our build agent and gets live URLs back.

Take over anytime

Every project is a git repo. Open browser VS Code on the live workspace, review commit history, and keep building where the agent left off.

API, webhooks, escape hatches

Prefer raw HTTP? Use the REST API. Subscribe to deployment and quota webhooks. exec, read_file, and write_file when you want direct control.

The toolbox

One goal in, full delivery out

MCP tools your agent can call, or wire into your own automation.

prompt

The headline tool. Your agent sends a goal ("build me a monitor for X") and our build agent plans, writes, runs, and ships. One call, full delivery.

list_templates

Browse starters for invoice makers, uptime monitors, price/job watchers, deal watchers, cleanup portals, and more.

list_projects / get_project

Check what's already been shipped. Your agent looks here before starting fresh, picks up where the last session left off.

create_project

Start a fresh project explicitly. Optional; the build agent can start one on its own.

exec / read_file / write_file

Escape hatch. If your agent wants direct access instead of delegating to the build agent, the primitives are here.

deploy

Publish manually. Skip if you delegated to the build agent; it ships automatically.

provision.sh
# 1. Provision a server. Just your API key, no plan field.
curl -X POST https://api.server4agent.com/servers \
  -H "Authorization: Bearer $SERVER4AGENT_API_KEY"
# → { "id": "srv_2k9", "url": null, "status": "running", "tier": "small" }

# 2. Hand it a goal. The build agent plans, writes, runs, ships.
curl -X POST https://api.server4agent.com/servers/srv_2k9/tasks \
  -H "Authorization: Bearer $SERVER4AGENT_API_KEY" \
  -d '{ "goal": "Check these URLs every 5 minutes and alert me on downtime" }'
# → { "task_id": "tsk_8t1", "status": "running" }

Three ways to call it

MCP server REST API Webhooks

The same surface over MCP, REST, or webhooks. Start from a goal, or drive the primitives yourself.

MCP toolsRead the docs

Pricing

Usage-based. Never a surprise bill

Usage is metered as dollar credits. You set a budget cap on your account, and work stays within your budget.

Starter

Ship your own tools.

$29/mo

  • 2 servers
  • $10 AI credits / mo
  • 3 live public projects
Choose Starter
Recommended

Pro

Run team workflows.

$99/mo

  • 3 servers
  • $40 AI credits / mo
  • 10 live public projects
Choose Pro
Account-wide budget cap Usage-based creditsSee full pricing →

Turn the request into something your team can open.

Describe the goal, start from a proven template, or connect an assistant. The result is a working project with a stable URL and a clean handoff path.

See how it works

Isolated, private by default, with hard budget caps