Mumbooth
Buy with ETH
Send ETH on Robinhood Chain, get a pack of blind coupons. One coupon pays for one fast message; a deep message takes three.
Coupons issued
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blind-signed, all time
Mumbooth4 frames · 0 names
Nobody in the picture.
Just a mask.
Pay with your wallet. Chat as nobody.1
Your wallet buys coupons. Your browser blinds them before the server signs, so the server can check a coupon is genuine and unused — but not which wallet bought it. One coupon, one message. No account, and no chat history on our server.
CA
0x000…000
CA at launch
Coupons spent
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one per fast message
Purchases
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public transactions
ETH received
—
treasury, read from chain
Tokens burned
—
balance of the dead address
Loading live numbers…Check every number →
1 “Nobody” = no account, no name, and a wallet the server can’t tie to your chat. Not: no IP. See /privacy.
§02How the booth works4 steps
One payment. One blind stamp.
Then the wallet leaves.
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Pay
Your wallet sends ETH to the treasury on Robinhood Chain. That transaction is public, like any other.
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Blind
Your browser makes random coupons and seals each one in a mathematical envelope. The server only ever sees the envelopes.
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Stamp
The server checks the payment, then signs the sealed envelopes without opening them. Your browser unseals and verifies every signature against the published key.
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Punch
Each message spends a coupon. The server sees a valid, unused coupon — not the wallet that bought it. The wallet is not asked for anything again.
§03What we seeitemised
What the server sees.
What it can’t.
| Item | Server | In plain words |
|---|---|---|
| Your purchase | Seen · stored | Buying coupons is a public transaction. We store the tx hash, wallet, and coupon count — the same data anyone can read on the explorer. |
| Which coupon is whose | Can’t tell | We sign coupons blind (RSA blind signatures, RFC 9474). The server cannot tell which wallet a coupon came from — among the N coupons issued with the current key. |
| Your messages | Passed through · not stored | We forward your message through OpenRouter to Anthropic’s Claude models and stream the answer back. Every request is restricted to zero-data-retention endpoints (OpenRouter zdr: true, docs: https://openrouter.ai/docs/features/zdr). We do not store messages, answers, or conversation history. |
| Your IP address | Visible · not logged | Access logging is off for all /api routes and the app never writes IPs. Your IP is still visible to the server at the network level — use a VPN or Tor if that matters to you. |
| Spent coupons | Hash · key id | Spent coupons are stored as a hash and key id only — no time, no IP, no model. |
| Timing | Not prevented | Buying and then chatting right away can be correlated by timing. Coupons are valid until the key’s end date; use them later if you want distance. |
Full list, including the free trial counter and the model provider: /privacy.
§04Coupons3 ways
Three ways to fill the booth
Burn for packs
Send tokens to the dead address. The server reads the burn on chain and signs a pack of coupons the same blind way. The rate is set when the token goes live.
Hold for daily coupons
Wallets holding the minimum balance can claim a few coupons each UTC day. Still blind-signed: the claim is public, the chats are not tied to it.
§05The regular1 mask
Booth regular · name withheld
The only one in the booth wears a mask.
No account. No name. A wallet the server can’t tie to your chat. Three free messages a day on this page, then one coupon per message.