For agents · a hosted MCP

The PCB tool your agent can finish a board with.

Give Claude Code, Cursor, ChatGPT or any MCP client the same tools the editor uses. It places, routes, checks and exports Gerbers; you watch the board in your browser and take over any time.

Get a key and connect See five real runs

GIF / MP4 LOOP · 20 s · 1200×675 Left: the agent's tool calls scrolling. Right: the 3V3 editor, parts landing, copper routing, then DRC 0. Real speed, the clock in the corner.

Set up

One line, then ask for a board.

Make a key on the Connect page. It is shown once.
Add 3V3 to your agent (the line on the right).
Ask for a board in plain words. Open app.3v3.dev to watch it happen.

# one line, then ask for a board
$ claude mcp add --transport http 3v3 https://mcp.3v3.dev/mcp \
    --header "Authorization: Bearer $V3_KEY"

> Make a 50 × 50 mm board with an ESP32-C3, USB-C power
  and a status LED. Route it and stop when the check is clean.

Five real runs

About four minutes, measured.

Five boards, each from one plain prompt to exported Gerbers by a real agent (Claude Code, Opus) on our hosted MCP. Uncut, every design-rule check clean.

Board	Time	Tool calls	Model cost
Relay module, 62 × 40 mm	3:43	79	$1.36
555 blinker	3:50	77	$1.45
Pico + I2S amplifier, 90 × 70 mm	3:52	34	$1.42
USB-C to 3.3 V, 30 × 37 mm	5:23	101	$1.94
ESP32-C3 + USB-C, 36 × 37 mm	7:46	50	$2.61

Median 3 min 52 s. The transcripts, every tool call in them, are linked here at launch.

What it got wrong, too. In a trial run before these five, the agent made a coin-cell board 35 × 23 mm instead of the 30 × 20 asked for, because the battery holder alone is 33.5 mm, and it said so. On the USB-C board the status stayed amber for the pins a power-only design leaves empty on purpose; that one was ours to fix, and is fixed: a pin can now be marked “not connected” (6 October).

Your key, your boards.

Keys are shown once, stored only as a hash, rate-limited and revocable in one click.
A key can build and change your boards; it cannot touch your account, billing or other keys.
Every tool call your agent makes is logged on your account.
Your agent works only on your boards. Nobody else's are reachable.