Solinkify

Lets an assistant pay x402 paywalls, datasets and store checkouts on Solana, within hard per-payment and daily spending caps.

What you can do

This local MCP server gives an assistant the ability to settle payments on Solana for x402 paywalls, datasets and store checkouts. Spending is bounded by two hard caps: a maximum for a single payment and a maximum total per UTC day. It can run in owner mode, where a designated owner wallet funds checkouts through its on-chain SpendAuthority while the agent signs but never holds the owner's funds. Discovery and search tools work without a wallet; only the spending tools need the agent keypair.

When to use it

Worth adding when an assistant needs to buy access to paid content, datasets or store checkouts on Solana without manual approval each time, and you want that spending constrained by explicit caps. Not needed if you only want discovery or search, since those tools run without a wallet. Test on devnet first.

Requirements

Runs locally over stdio, installed from the npm package @solinkify/mcp, so Node.js is required; desktop only. No authentication is declared. Optional environment variables: SOLANA_RPC_URL (defaults to public RPC), SOLINKIFY_NETWORK (devnet by default, or mainnet-beta), SOLINKIFY_DAILY_CAP_USD (default 10), SOLINKIFY_MAX_PAYMENT_USD (default 1), SOLINKIFY_OWNER_WALLET, and SOLINKIFY_WALLET_PATH for the agent keypair, which spending tools need.