Chiprun · siliconless firmware simulation

Give your coding agent real hardware. Virtually.

An agent can write firmware. It can't run it on a chip, see what the chip did, or fix what it can't observe. Chiprun closes that loop over a single MCP endpoint — no board on a desk, no flashing, no waiting.

Start free Read the docs

Free tier, no credit card. 11 boards across 3 chips, and the board is simulated too — not just the CPU.

agent session

# your agent, connected to https://urdb.io/mcp
chiprun_list_boards()
→ uno · atmega328p · avr-none
chiprun_create_firmware_upload()
→ upload_url, firmware_id  (PUT your ELF)
chiprun_run_firmware({ board: "uno" })
→ Hello world!

The loop, closed at the hardware.

Connect the endpoint

Point your coding agent at https://urdb.io/mcp with an API key. Standard MCP — Claude Code, Cursor, and anything else that speaks the protocol.

Upload a compiled ELF

Cross-compile on your side and PUT the binary to a presigned upload slot. We run it as-is; nothing about your toolchain has to change.

Read the UART back

The run returns inline with whatever the chip printed. Bounded by virtual CPU time, so a runaway loop returns at the cap instead of hanging.

What we're building

Two products, one endpoint, one API key.

Firmware simulation, over MCP

Your agent uploads a compiled ELF, runs it on a virtual instance of a real microcontroller, and reads the UART output back. No board on a desk, no flashing, no waiting.

Runs are bounded by virtual CPU time, so firmware that loops forever returns at the cap with whatever it printed — it never hangs your agent.

Read the quickstart

Arduino Uno R3

uno · avr-none

16 MHz

Arduino Nano (ATmega328P)

nano · avr-none

16 MHz

Arduino Pro Mini 5V/16MHz

pro-mini-16 · avr-none

16 MHz

Arduino Pro Mini 3.3V/8MHz

pro-mini-8 · avr-none

8 MHz

Arduino Duemilanove (ATmega328)

duemilanove · avr-none

16 MHz

Arduino Mini

mini · avr-none

16 MHz

LilyPad Arduino

lilypad · avr-none

8 MHz

Arduino Mega 2560

mega2560 · avr-none

16 MHz

Arduino Mega ADK

mega-adk · avr-none

16 MHz

Arduino Diecimila (ATmega168)

diecimila · avr-none

16 MHz

Arduino Nano (ATmega168)

nano-168 · avr-none

16 MHz

More boards and architectures are landing continuously — each ships only with a passing smoke test on its own chip.

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The URDB Integrity Awards 2025: The Full Story

Behind every winner and every Hall of Shame inductee in the first URDB Integrity Awards is a story about choices: the ones manufacturers made, the ones they didn't, and what those choices cost the people who trusted them enough to buy their products. This is the full account.

And the database that started it.

URDB tracks how consumer products get worse over time — downgrades, warranty cuts, feature removals — scored and evidence-backed. Query it from the same MCP endpoint.