Run quantum experiments — no physics degree needed.

Tell an AI agent what you're curious about, watch your A quantum bit. Like a bit it reads out as 0 or 1 when measured, but before that it can hold a blend of both with different weights. run on a simulator, and get results explained in plain words — with a tamper-evident A record on Robinhood Chain that ties your job to a fingerprint (SHA-256) of its result file. It proves the file hasn't changed since — not that the maths was right. on Robinhood Chain.

Free simulatorNo account or walletResults as measured
How it works

Three steps from idea to verified result

  1. DescribePick a ready-made experiment or ask the agent in plain English. It proposes a plan — it never runs anything on its own.
  2. RunYou press Run. A Qiskit simulator executes the circuit within clear limits and streams the results back live.
  3. Verify on Robinhood ChainEvery result gets a SHA-256 fingerprint your wallet can record on-chain, so anyone can check it hasn't changed.
Playground

Build a circuit, see the odds instantly

Drop gates onto qubit wires and watch the exact probabilities update — computed right here in your browser from the The full list of numbers (amplitudes) describing every possible outcome of the qubits. Squaring each one gives its probability.. Start with the Bell pair below: two qubits in When qubits share one joint state, so their outcomes are linked. Measure one entangled qubit and you know something about the other., so they always agree.

Your circuit

Hadamard — puts a qubit into an even superposition. Click a wire to place the gate.
h●
·⊕

2 gates · click a placed gate to remove it · outcomes read with qubit 0 on the right.

Exact probabilities

browser preview — not authoritative

A perfect coin flip between 00 and 11.

Computed in your browser from the statevector. Real runs with shots, seeds and receipts happen on the server.

Run it on the simulator
Experiments

Ready-made experiments to start with

Nine classics — from entanglement and teleportation to search, hidden-function puzzles and random numbers. Each one teaches a real quantum idea. Pick one, press Run, and the lab explains what happened.

Verifiable results

Results you can prove haven't been edited

Every finished job produces a manifest file. Its SHA-256 fingerprint can be written to a registry contract on Robinhood Chain by your own wallet. Later, anyone can drop the file into the verifier: if a single byte changed, the fingerprint won't match.

Honest fine print: a receipt is a commitment to the result, not a proof of correctness.

Open the verifier
manifest.jsoncounts, circuit, seed
SHA-256
Robinhood Chain
On-chain agents · free

Helpers that read the chain for you

Two agents for Robinhood Chain. They explain what they find in plain words, link every claim to its evidence, and never touch your funds.

$QEDRA & the Holder Pass

A token that's just for fun extras

Not launched Any contract claiming to be $QEDRA before an address appears here is not ours.

It plays no part in compute — the simulator is free and needs no wallet. Holding it unlocks the optional Lens, a 3D view of your qubits. Nothing here is investment advice.

See the Holder Pass →
For AI agents

Let Claude, Cursor or VS Code use Qedra

An MCP endpoint, no key needed: experiments, token checks and exposure checks as tools. No hardware, signing or funds.

$ claude mcp add --transport http qedra https://…/api/mcp
plan_experimentrun_experimenttoken_safety_reportquantum_exposureverify_receipt

Set up an agent →