Nacre: Private payments for AI agents
Nacre
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Private payments for AI agents

Nacre

Your agents can pay. Nobody has to watch. The first router to shield multi-chain exposure with heuristic, Groth16-shielded transfers, and intent-based cross-chain settlement behind one wallet-standard connection. Built for agents, open to people.

$ claude mcp add --transport http nacre https://nacreshield.xyz/mcp

Free · no sign-up · read-only, nothing to sign

  • Agent-ready (MCP)
  • Glass Check exposure report
  • Shielded USDC
  • Shielded SOL
  • Exits to ZEC · Aleo · XMR · BTC
  • Private receive links
  • Wallet watch alerts
Or scroll to see what agents leak

01 · The ledger

Every agent leaves a trail.

Each thread is a wallet. Each light is a transfer. Agents run on schedules, pay the same endpoints and share one funder, so their patterns are the easiest on the chain to read.

02 · The veil

Then the trail frosts over.

Nacre moves transfers into a shielded pool. Everything still settles on Solana, and far less of it is legible to the people watching.

03 · The proof

Proven, never shown.

Your transfer becomes a zero-knowledge proof. Validators check the math, mark the note as spent, and learn nothing about who paid whom.

Commitment
0x2b9e…c41f
Nullifier
0x7f3c…0a92
Proof
Groth16 · 256 bytes
Revealed
Nothing

04 · The network

Private by default.

Same chain, same speed, same fees. Your agent keeps working on its own. The only thing that changes is who gets to watch.

Connect a Solana wallet to run Glass Check on it.

Before you use Nacre

Nacre is a non-custodial interface. It never holds your funds or keys; transactions are signed in your own wallet and executed by third-party protocols: Umbra (Arcium), Privacy Cash, NEAR Intents and Exolix. The Monero swap through Exolix is custodial while the exchange runs. Smart contracts, relayers and swap services can fail, pause, or lose funds, and Nacre cannot reverse a transaction. Deposits, swaps and their amounts are visible on-chain; privacy comes from what happens after. Start with small amounts. Privacy tools are restricted in some jurisdictions; you are responsible for complying with the laws that apply to you. Nothing here is financial or legal advice.

05 · Use it today

Give your agent a private wallet. Or use it yourself.

Nacre is a privacy router built for agents, with the same tools open to people. It shows what the chain gives away, shields it across the deepest live pools, and waits exactly as long as you set before anything moves again.

SolanaZcashMoneroRobinhood ChainAleoEthereum

06 · For agents

Your agent gets a privacy router.

Agents are the easiest wallets on earth to track. They run on schedules, pay the same endpoints and are all funded by the same owner.

One line gives any MCP agent the whole router: score a counterparty before paying it, shield its float into an encrypted balance, and move value across chains without a bridge UI. Every step is a plain tool call, so nothing needs a human in the loop. Connect to the hosted MCP endpoint with no install, or run the local server when the agent should sign.

  • glass_checkScore any Solana wallet before paying it.
  • pool_depthLive crowd size of Solana privacy pools.
  • shield / unshieldMove USDC into and out of an Umbra encrypted balance.
  • private_balanceDecrypt the agent's shielded balance locally.
  • route_quote / route_createCross-chain to Zcash, Aleo, Robinhood Chain, Bitcoin and more via NEAR Intents.
  • route_fundPay the deposit address from the agent wallet, capped by NACRE_MAX_USDC.
  • route_statusTrack a transfer until it lands.
Agent sessionnacre-mcp 0.3
# remote, nothing to install (read-only)
$ claude mcp add --transport http nacre https://nacreshield.xyz/mcp
# or local, adds signing: shield, unshield, route_fund
$ curl -O https://nacreshield.xyz/nacre-mcp.mjs
$ claude mcp add nacre -- node nacre-mcp.mjs

nacre.glass_check(counterparty)     exposure, funder, active hours
nacre.pool_depth(depth: 256)        live tx/h, hours to depth
nacre.shield(250 USDC)              encrypted balance on Umbra
nacre.route_create(sol USDC → zec)  deposit address
nacre.route_fund(deposit)           paid from the agent wallet

Claude Desktop, Cursor or another client? Setup for every client · REST API · llms.txt

Claude Desktop, Cursor or another client? Setup for every client · llms.txt

07 · Glass Check

See what a tracker sees.

Paste any Solana or Robinhood Chain wallet. In about a second you see who funded it, which wallets share that funder, where it cashes out and what hours you are awake.

Reads live Solana mainnet data right now. Deeper history unlocks only for a wallet you sign for.

Exposure reportLive Solana data

08 · Depth picker

You choose how deep you hide.

Pools leak through timing. Deposit 6 SOL at 14:02, withdraw 6 SOL at 14:03, and the crowd you hid in was one person.

So every note waits for depth: the number of look-alike deposits that land after yours. Pick a depth, or pick a deadline and let Nacre find the deepest pool that makes it. Each note also gets a private random margin, so nobody can count back from your withdrawal.

Depth pickerLive Solana pool rates
Depth128
64 minReady in
384Crowd needed in band
1 in 128Best odds of a guess

09 · Routes

Every route. A depth on every hop.

The router chains live rails into routes: Solana pools, NEAR Confidential Intents, shielded Zcash, Monero by atomic swap or aggregator, Privacy Pools on Robinhood Chain, Railgun and private dollars on Aleo.

Each pool hop waits for the depth you picked above. More hops take longer, and each hop with its own crowd multiplies the work needed to link the two ends.

Route builderLive quotes · NEAR Intents

Route map (illustrative)

    —Estimated total time
    —Hops with their own crowd
    —Nacre route fee

    10 · More ways to vanish

    Small tools that keep the crowd deep.

    Crowd · live

    Tide windows

    The hours when Solana privacy pools are busiest, measured from mainnet right now. Deposit inside a tide and your note lands in the biggest crowd.

    Measuring…

    Get paid · live

    Receive links

    Share one link. Whoever opens it pays USDC straight into your encrypted Umbra balance, so the amount you hold never shows on-chain.

    Alerts · live

    Watch mode

    Watch any wallet. Every time you come back, Nacre checks the chain and tells you what moved since your last look.

    Exit · live

    Private exits

    Leave to shielded Zcash, private dollars on Aleo or Monero from the route builder above, with live quotes and tracked status.

    Earn · next

    Yield while waiting

    Long waits routed to pools that earn inside the pool, such as Privacy Pools v2 with Aave yield.

    Agents · live

    Remote MCP and REST API

    Connect to /mcp with no install, or call /api over plain HTTP. Read-only, never holds keys. Next: API keys with per-agent spend caps, endpoint allowlists and a kill switch.

    11 · Rails

    One router. Every rail worth using.

    Nacre does not ask anyone to trust a new pool. It routes through rails that are already live and picks the deepest one for each hop.

    Live · Solana

    Umbra on Arcium

    Encrypted balances and a mixer that breaks the deposit-to-withdrawal link, public since March 2026.

    Default shield rail.

    Live · Solana

    Privacy Cash

    Audited shielded pool for SOL, with a 0.25% withdrawal fee.

    Second hop for larger amounts.

    Live · Solana

    MagicBlock

    Private payments inside a TEE rollup, with stealth handles and gasless USDC transfers.

    Session wallets and receive links.

    Live · cross-chain

    NEAR Intents

    Confidential Intents hide size, timing and counterparties. About $29B in cumulative volume by September 2026.

    Moves value between chains.

    Live · Zcash

    Shielded ZEC

    The Orchard pool holds about 30% of all ZEC. Depth counts the Orchard notes added since yours.

    Long-term private storage.

    Live · Monero

    Monero

    Private by default. Reached by trustless BTC-to-XMR atomic swaps or by swap aggregators.

    The deepest exit.

    Live · Robinhood Chain

    Privacy Pools v2

    Private payments, swaps and Aave yield inside the pool, live on seven networks since October 22, 2026.

    Shielding on Robinhood Chain.

    Live · Aleo

    USDCx

    Circle-backed dollars where sender, receiver and amount are encrypted by default, moved in over CCTP.

    Private dollars.

    Live · inference

    Venice · NEAR AI

    Private models with no stored prompts, paid over x402 with no account, or run in attested hardware.

    Keeps the agent's reasoning private.

    12 · Flywheel

    Privacy is a crowd. Every deposit hides everyone else.

    01 02 03 04 05 deeper crowd
    1. Glass Check shows the leakA free, shareable score. People post their numbers, and every share brings in another wallet.
    2. One tap shields itSign in with Privy, pick a depth, done. No seed phrase to learn.
    3. Each deposit deepens the crowdYour note gets more company, and so does everyone else's. Tide windows make the bursts bigger.
    4. Depth arrives fasterShorter waits for people, smaller Cellars for agents, cheaper private spending for both.
    5. Agent platforms plug inMCP and x402 make Nacre one dependency. Agent fleets deposit around the clock, which feeds step three.

    13 · How it pays for itself

    Revenue from people using privacy, not from trading a token.

    Data · phase 1$0.01

    Per Glass Check over x402, or monthly plans for wallets and platforms. Depth data at $0.001 a call.

    App · phase 20.15%

    Interface fee on shields, in the same transaction the user signs.

    Routes · phase 20.15%

    Per hop Nacre orchestrates on multi-hop routes to Zcash, Monero, Aleo or Robinhood Chain, shown in the quote.

    Agents · phase 3$19

    Per hosted agent a month, plus 0.1% of Cellar volume. Local mode stays free and open source.

    Pricing. For scale, Privacy Cash earned about $60,000 in fees in 30 days at a 0.25% withdrawal fee.

    14 · Begin

    Start with one line.

    Add nacre-mcp to your agent, or connect a Solana wallet to run Glass Check yourself.