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@subly_fi/pay

v0.1.1

Published

Subly client: pay for x402 (subly-yield-exact) HTTP resources from Kamino vault yield. Ships an MCP server and a one-shot pay/deposit CLI; non-custodial (signs locally with your own key).

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@subly_fi/pay

Subly client for x402-style HTTP payments funded by Kamino vault yield — your agent pays for paywalled APIs from the yield on deposited USDC, and the principal is never spent. Non-custodial: it signs locally with your own Solana key; Subly never holds it.

Ships one pay dispatcher bin with subcommands, all runnable with npx (no clone):

  • pay mcp — an MCP server (Claude Code, Cursor, any MCP client)
  • pay fetch <url> — one-shot: pay for a URL, print the receipt (used by the OpenClaw skill)
  • pay deposit <amountRawUsdc> / pay withdraw <amountRawUsdc> — vault deposit / withdraw

Wallet

Subly does not create wallets — bring your own Solana keypair:

solana-keygen new --no-bip39-passphrase -o ~/.subly/agent.json
export SUBLY_DEMO_AGENT_KEYPAIR_PATH=~/.subly/agent.json

Send USDC (Solana mainnet) to the printed address — no SOL needed, fees are sponsored — then deposit (vault minimum 1 USDC; deposit self-registers the wallet):

npx -y @subly_fi/pay deposit 1000000   # 1 USDC

Use it

# Claude Code (no clone):
claude mcp add subly -- npx -y @subly_fi/pay mcp

# One-shot pay (also what the OpenClaw skill calls):
npx -y @subly_fi/pay fetch https://seller.example.com/api/premium

Environment

| Var | Required | Default | |---|---|---| | SUBLY_DEMO_AGENT_KEYPAIR_PATH | yes (or SUBLY_DEMO_AGENT_KEYPAIR base58) | — | | SUBLY_FACILITATOR_URL | no | https://api.demo.sublyfi.com | | SOLANA_RPC_URL | no | public mainnet RPC | | SUBLY_MCP_MAX_AMOUNT_RAW_USDC | no | 10000 (0.01 USDC) per-payment cap |

Requests authenticate with a signature from your wallet key — there is no API token. The cap and the facilitator's yield-budget check both bound spending; the principal is never touched.