Shinjuku Shield
Private x402 payments on Solana: shield, pay, and unshield USDC under caps you set.
- GitHub stars
- 9
- tools
- 12
- auth
- Secret needed
- transport
- STDIO
- env vars
- 2
- last updated
- Nov 11, 2026
Tools
12 toolsPublic tool metadata for what this MCP can expose to an agent.
shinjuku_setupAsks you to confirm in your MCP client that it may create a Shinjuku Shielded wallet on this machine, and shows the caps. Then it runs the setup and switches the same server to the wallet tools.
Asks you to confirm in your MCP client that it may create a Shinjuku Shielded wallet on this machine, and shows the caps. Then it runs the setup and switches the same server to the wallet tools.
No parameter schema in public metadata yet.
wallet_statusSays whether the wallet is set up, and what to do next.
Says whether the wallet is set up, and what to do next.
No parameter schema in public metadata yet.
wallet_add_fundsGives a new one-time Solana address of this wallet and a `solana:` pay link. Send USDC to it from any wallet or exchange, from 0.01 USDC.
Gives a new one-time Solana address of this wallet and a `solana:` pay link. Send USDC to it from any wallet or exchange, from 0.01 USDC.
No parameter schema in public metadata yet.
wallet_shieldMoves USDC that is already on the wallet's own Solana key into your shielded balance: any amount from 0.01 USDC, while the shielded balance stays at most 5 USDC.
Moves USDC that is already on the wallet's own Solana key into your shielded balance: any amount from 0.01 USDC, while the shielded balance stays at most 5 USDC.
No parameter schema in public metadata yet.
x402_discoverSearches public x402 listings on your machine and returns the sellers that match. Pays nothing.
Searches public x402 listings on your machine and returns the sellers that match. Pays nothing.
No parameter schema in public metadata yet.
x402_previewOne unpaid request. Returns the seller's price, the scheme, and whether your caps allow it. Pays nothing.
One unpaid request. Returns the seller's price, the scheme, and whether your caps allow it. Pays nothing.
No parameter schema in public metadata yet.
x402_payPays the URL (if it asks for payment) and returns the answer. Alias: `fetch_paid`.
Pays the URL (if it asks for payment) and returns the answer. Alias: `fetch_paid`.
No parameter schema in public metadata yet.
inference_chatOne AI answer from usePod's x402 chat endpoint, paid privately from your shielded balance.
One AI answer from usePod's x402 chat endpoint, paid privately from your shielded balance.
No parameter schema in public metadata yet.
wallet_unshieldSends shielded USDC to a public Solana address. It is on with `--exit-proof-tools` and `--profile`.
Sends shielded USDC to a public Solana address. It is on with `--exit-proof-tools` and `--profile`.
No parameter schema in public metadata yet.
wallet_balanceReturns the one balance (what `x402_pay` can spend) and the unshielded balance on the wallet's own Solana key, with a breakdown.
Returns the one balance (what `x402_pay` can spend) and the unshielded balance on the wallet's own Solana key, with a breakdown.
No parameter schema in public metadata yet.
wallet_receiptsYour most recent paid receipts, with kind, host, amount and transaction.
Your most recent paid receipts, with kind, host, amount and transaction.
No parameter schema in public metadata yet.
wallet_cancelCloses one unfinished payment, the pieces of a private send that did not start, or an add-funds link that no USDC reached.
Closes one unfinished payment, the pieces of a private send that did not start, or an add-funds link that no USDC reached.
No parameter schema in public metadata yet.
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SHIELDED_WALLET_HOMEThe private folder that holds the encrypted wallet and config.json. Default: ~/.carbon-shielded-wallet (the folder that setup uses).
SHIELDED_WALLET_PASSPHRASEsecretThe wallet passphrase, if you do not use --passphrase-file.
Readme
Shinjuku Shield. The privacy suite for AI. Shield once. Pay anywhere.
Shinjuku Shield
The privacy suite for AI. Shield once. Pay anywhere.
Install it once. Take your privacy everywhere you and your AI go.
Details
- Repository
- github.com/shinjukustaition/shinjuku-shield
- Website
- shinjukustaition.com
- Category
- Finance & Commerce
- Package
shinjuku-shield- Transport
- STDIO
- Auth
- Required
- Registry
- MCP registry, active
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