Stackon
Start free

Run AI agents on your codebase.
And prove they got better.

Stackon is the observability-first workspace for teams running Claude and Codex. Every agent run becomes a replayable trace — cost, latency, and eval results attached — dropped into your existing stack over MCP, no rewrites.

Start freeExplore the platform

● Recently shipped · v0.99.53

Meet Jarvis — Stackon Space gets a voice

trace · speciment+00:00:14.2
trace · run_8c4f742ms · $0.0045
agent.plan
742ms
tools.search
118ms
llm.completion
284ms
tools.edit
92ms

eval · gate.passed

PR check ready to merge

5/5 assertions$0.0045 · 0 retries
cost · this monthteam · acme

$312 / $1,000

31% · ↘ 18% wow

canvas$184
evals$93
adversary$35
5 spans · 1 eval · 1 budget meterillustrative

19/20

Pillars shipped

Phase 2 · 3 · 4 — auto-counted

7 editors

Speak Stackon MCP

Claude Code · Cursor · Windsurf · Codex · Zed +2

$0 to start

Free tier

No card — upgrade when your team grows

Built to ship together

Four products.
One workflow.

Everything an engineering team needs to go from intent to production — with agent teammates at every step of the ship loop.

Trace.

See every span. Replay any run. Ship with receipts.

trace · run_8c4f742ms · $0.0045
agent.plan
700ms
tools.search
154ms
llm.completion
266ms
tools.edit
126ms

Canvas.

Wire a Planner → Coder → Reviewer pipeline. Watch them debate.

Planner
Coder
Reviewer

MCP.

One JSON block. Every tool wakes up connected to your workspace.

{
  "mcpServers": {
    "stackon": {
      "command": "npx",
      "args": ["@stackon/mcp"]
    }
  }
}

Mobile.

Approve queued runs from your phone. Watch traces land in real time.

Approvals3 pending
PR review pipeline3 nodes · 1m ago
→
Schema migration1 node · 4m ago
→
Release notes2 nodes · 9m ago
→
§ 02Lead pillar

Every run
leaves a trace.

Typed spans for every LLM call, tool, and child task — cost and latency captured by default. Replay any run, days later. Prove this week beat last week.

Trace · run_8c4ft+00:00:14.2 · live capture
latency742mscost $0.0045
agent.plan
742ms
$0.0024
tools.search
118ms
$0.0003
llm.completion
284ms
$0.0017
tools.edit
92ms
$0.0001
evals.assert
61ms
—
eval · pass5/5 spans · 0 retries

otel · jsonb · pgvectorspecimen / 005

01

OTel-compatible

Bring your existing observability stack along — no rewrites, no proprietary schema.

02

Cost on every row

Token spend rolled up per span, per task, per team. Budgets and alerts shipped in.

03

Eval gates

PRs blocked the moment a trace regresses against last week. Receipts attached.

Explore Trace

The agentic stack

From Prompt.
To Production.

Describe the task. Orchestrate a team of agents. Ship a measurable result. Stackon is the loop that closes itself — every run leaves a trace.

01 · Describe

Describe.

Open a Mission. Drop a task description in 3-6 lines and let the Planner agent decompose it into concrete subtasks across 30+ languages.

mission · M-0042● draft

Ship fresh-token rotation to /api/v1/auth.

// Acceptance: existing access tokens stay valid until expiry; new column on api_tokens for hashed refresh secret; migration ships in same PR.

Planner ready · 4 subtasks proposed

02 · Orchestrate

Orchestrate.

Wire a canvas: Planner → Coder → Reviewer → Tester. Watch them debate. Stackon hands the baton between agents that already share your repo, ADRs, and prior traces.

canvas · auth-rotation● running
Planner

claude-opus-4-7

Coder

claude-opus-4-7

Reviewer

claude-opus-4-7

Tester

claude-opus-4-7

03 · Ship

Ship.

Evals run on every PR. Budgets catch the runaways. Approvals fan out to mobile. The same trace that proved this run worked will prove next week's didn't regress.

eval · gate.passed5/5 assertions

✓ ship/auth-token-rotation

PR #1142 opened · 1 review requested

$ stackon trace receipts

→ 16 spans · 742ms · $0.0045 · 0 retries

§ 03Ecosystem

The full suite.
Built to ship together.

The platform is a constellation of products, each fluent in the same spans, the same identity, the same budgets. Build the slice you need first.

obs · receipts

Observability

Prove every agent run. Traces, evals, postmortems, adversarial sweeps, cost — instrumented end to end.

build · orchestrate

Canvas & Missions

Compose multi-agent pipelines visually, version them like code, ground them in your repo and ADRs.

everywhere · trusted

Apps & Surfaces

Reach your agents from any surface. CLI, MCP, phone, voice, BYO compute — same trace, same identity, same trust.

§ —Get started

Up and running in 60 seconds.

Point your existing agents at Stackon over MCP — or one OTel-compatible endpoint. No SDK to adopt, no schema to migrate, bring your own model keys. Your traces start flowing immediately.

01

Create a token

Mint a scoped token in Settings → Tokens.

ht_live_••••••••••••
02

Add the MCP server

Drop one block into your editor's MCP config.

{
  "mcpServers": {
    "stackon": {
      "command": "npx",
      "args": ["@stackon/mcp"]
    }
  }
}
03

Watch it land in Trace

Every call your agent makes becomes a span in Trace — cost, latency, and replay included.

span
span
span

Speaks Stackon MCP to

  • Claude Code
  • Cursor
  • Windsurf
  • Codex
  • Zed
  • VS Code
  • JetBrains
  • GitHub Actions
§ 04Receipts

We ship in public.
Read along.

Full changelog
shipped2026-07-04

Meet Jarvis — Stackon Space gets a voice

<strong>Stackon Space</strong> opens onto something new: <strong>Simple mode</strong>, a voice-first stage with a single breathing Stackon mark. Talk to it &mdash; or type &mdash; and <strong>Jarvis</strong> does the rest: creates projects, dispatches real, traced Claude Code agents, watches your pull requests, and reports back out loud. Speech recognition runs <strong>fully on your machine</strong> (local Whisper), and the full workspace &mdash; now <strong>Advanced mode</strong> &mdash; stays one toggle away, exactly as you left it.

v0.99.53

shipped2026-07-03

GitHub, woven into Stackon Space

<strong>Stackon Space</strong> now keeps GitHub in your peripheral vision instead of behind a door. A new <strong>status chip in the footer</strong> always shows your current branch, its open pull request, and a live check-status dot &mdash; and one click takes you exactly where that state points: the PR itself, a pre-filled <strong>Create PR</strong> form for a branch that doesn&rsquo;t have one yet, or a guided <strong>connect checklist</strong> if GitHub isn&rsquo;t set up. <strong>Agent-lane cards</strong> show their branch&rsquo;s PR and checks at a glance, too.

v0.99.52

shipped2026-07-01

Live Preview — see your app inside Stackon Space

<strong>Stackon Space</strong> gains a <strong>Preview pane</strong>: a toggleable rail that renders the web app you&rsquo;re building, live, right beside your terminals and editor. Start your dev server in a terminal tab and Space <strong>detects it</strong> &mdash; reading your <code>package.json</code> scripts and probing the usual ports &mdash; then attaches with one click. Every hot reload your agents trigger shows up instantly.

v0.99.51

§ 05Start

Ship agents you can trust — starting today.

Create a free workspace and instrument your first agent run in minutes. No credit card, no waitlist.

Start freeSee pricing

Free to start · upgrade when your team grows

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