money.barker/stablecoin-yield

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Barker's real-time stablecoin yield index + AI advisor + non-custodial deposit/redeem (x402 paid).

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "stablecoin-yield": {
      "url": "https://mcp.barker.money/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (12)

• barker_defi_vaults

  Query real-time stablecoin supply yield pools from Barker's index of 500+ DeFi protocols. Returns ranked rows with protocol_name, chain_name, asset_symbol, supply_apy_total (decimal — multiply by 100 for %), and supply_tvl (USD). Use for questions like 'best stablecoin yield', 'where to earn on USDC', 'compare lending rates', '稳定币利率'. (paid: $0.001 per call via x402)

  Parameters:

  • sort — string — Sort key
  • asset — string — Stablecoin symbol (lowercase): usdt, usdc, dai, usde, usds, fdusd, gho, crvusd, pyusd, sdai, frxusd, tusd, lusd, dola, etc.
  • chain — string — Chain name (lowercase): ethereum, bsc, arbitrum, base, polygon, optimism, avalanche, solana, etc.
  • limit — integer — Row count (default 50, max 100)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_market_overview

  Barker's stablecoin market snapshot: total market cap, yield-bearing cap, asset distribution, chain distribution. Use for 'stablecoin market cap', 'USDT market share', '稳定币市场份额'. share_pct fields are decimals (0.425 = 42.5%). (paid: $0.001 per call via x402)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_market_trend

  Barker's historical APY trend for stablecoins vs. US Treasury benchmark over a lookback window (7–180 days). Use for 'DeFi vs treasury', 'is stablecoin APY going up', 'crypto yield trend', '稳定币利率走势'. (paid: $0.001 per call via x402)

  Parameters:

  • days — integer — Lookback window in days (default 30)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_yield_advisor

  FLAGSHIP: 'Where should I park my stablecoins right now?' Returns a ranked top-N recommendation across Barker's DeFi yield index (500+ protocols) with data-derived reasons and risk flags per pick (APY vs market median, TVL depth, incentive-dependence, lock terms). Use for 'best place for my USDC', '钱放哪收益最好', 'recommend stablecoin yield with low risk'. APY unit: percent (6.2 = 6.2%). (paid: $0.03 per call via x402)

  Parameters:

  • risk — string — Risk band → TVL floor $10M/$1M/$100K
  • asset — string — Stablecoin symbol (lowercase): usdt, usdc, dai, usde, ...
  • chain — string — Optional chain filter (lowercase)
  • limit — integer — Top-N picks (default 5)
  • min_tvl — number — Optional explicit TVL floor (USD)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_pool_detail

  Full single-pool dossier from Barker's index by pool_uid: all APY components (percent unit), TVL, terms, execution capability, reward breakdown. Use after barker_defi_vaults / barker_yield_advisor to inspect one pool. (paid: $0.005 per call via x402)

  Parameters:

  • pool_uid (required) — string — Pool uid from list tools

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_pool_history

  Per-pool APY/TVL time series from Barker's index (default 30d, APY percent unit) for trend and volatility analysis of one pool_uid. Use for 'is this pool's APY stable', '这个池子收益稳不稳'. (paid: $0.005 per call via x402)

  Parameters:

  • pool_uid (required) — string
  • days — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_pool_search

  Fuzzy search Barker's pool index by keyword (protocol name / pool name / asset). Resolves natural-language pool references to pool_uid for the detail/history tools. (paid: $0.001 per call via x402)

  Parameters:

  • keyword (required) — string
  • limit — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_crosschain_routes

  Barker's cross-chain route availability for a stablecoin from a given chain (bridge/venue coverage). Use for 'bridge USDC from arbitrum', '跨链路径'. (paid: $0.01 per call via x402)

  Parameters:

  • from_chain (required) — string — Origin chain (lowercase)
  • symbol (required) — string — Stablecoin symbol (lowercase)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_executable_pools

  EXECUTION DISCOVERY: which stablecoin vaults in Barker's index support direct deposit/redeem through barker_execution_quote. Returns executable pools with adapter support, live deposit capacity (is_full) and APY/TVL. Call this before barker_execution_quote — every pool listed here can be quoted, and its pool_uid is the exact string that tool expects (its vault_token_address works there too). Skip this call entirely if you already know the vault contract address. All parameters are optional: call with no arguments to get the top executable pools across every asset. APY unit: decimal (0.05 = 5%). Use for 'which pools can my agent actually deposit into', '哪些池子能直接存'. (paid: $0.01 per call via x402)

  Parameters:

  • asset — string — Optional stablecoin symbol filter, case-insensitive: usdc, usdt. Omit to list all assets.
  • chain — string — Optional chain filter (lowercase), e.g. base, ethereum
  • limit — integer — Max rows (default 20)
  • query — string — Optional pool keyword, e.g. 'Steakhouse USDC'
  • action — string — Filter by executable action
  • min_tvl — number — Min TVL floor in USD (default 1000000)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_execution_quote

  EXECUTION QUOTE (non-custodial): buy an unsigned, ready-to-sign transaction that deposits into or redeems from a stablecoin vault. Returns transaction_request {chainId,from,to,data,value} + route + risk summary + approval info. Barker NEVER broadcasts and never holds funds — return the transaction to YOUR user's wallet to sign; vault shares always go to signer_address (receiver is not a parameter). Same-chain only (self/portals adapters). pool_uid takes EITHER a Barker pool_uid OR the vault contract address — if you already know the vault address, quote directly, no discovery call needed. Flow: barker_yield_advisor → barker_executable_pools → this tool → your user signs. Asset identity is resolved by the selected pool; symbols and underlying-asset token addresses are never accepted as identity (pass the VAULT contract, not the asset contract). If a pool has multiple possible underlying assets, the backend rejects ambiguity instead of guessing. Use for 'deposit 1000 USDC into this vault', '帮我把 USDC 存进这个池子（自己签名）'. (paid: $0.05 per call via x402)

  Parameters:

  • pool_uid (required) — string — Either the exact pool_uid from barker_executable_pools (copy verbatim), OR the vault contract address (0x + 40 hex) if that is what you already have — no discovery call needed. Both are matched exactly; partial names and keywords are rejected (POOL_NOT_FOUND), because this is a money path and Barker never guesses the pool. If one contract hosts several products (e.g. Pendle PT vs LP), you get 409 POOL_AMBIGUOUS with the exact candidates to choose from.
  • amount_base_units (required) — string — Integer amount in token base units (1 USDC = 1000000). For redeem: underlying assets to withdraw. Send either this OR `amount` — not both (they are cross-checked and a mismatch is rejected).
  • signer_address (required) — string — EVM address that will sign AND receive vault shares / redeemed assets. Mandatory — it is the tx sender and the share recipient, so Barker can never infer or default it.
  • action — string — Default deposit
  • amount — string — Same amount in human units ("1000" = 1000 USDC), converted server-side using the pool's own asset decimals. Use this if you don't want to compute base units yourself. Alternative to amount_base_units.
  • chain_id — integer — Optional, only useful when pool_uid is a contract address that is deployed at the same address on several chains (e.g. Aave aTokens). EVM chain id, e.g. 8453 for Base.
  • slippage — number — Optional slippage tolerance, e.g. 0.005

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_vault_position

  VAULT POSITION (on-chain read): current redeemable value of a wallet's ERC-4626 vault position. Pass the pool_uid (from barker_executable_pools / barker_execution_quote) and the wallet address; Barker resolves the vault contract and reads balanceOf + convertToAssets directly on-chain, returning shares and current_value in the vault's underlying asset (value_asset, e.g. USDC). Barker does not store your deposit baseline — record the principal you deposited yourself; earned = current_value - your net deposits. Use after depositing via barker_execution_quote to monitor a position: 'how much is my vault position worth now', '我存进金库的 USDC 现在值多少'. (paid: $0.001 per call via x402)

  Parameters:

  • address (required) — string — EVM wallet address holding the vault shares (0x + 40 hex)
  • pool_uid (required) — string — Barker pool uid of the ERC-4626 vault, e.g. morpho-vault_base_usdc_0xee8f4ec5 (from barker_executable_pools)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• barker_paper_hedge_farm

  Papertrade (HyperEVM) hedge-farm snapshot: PAPER mint rate per USD lost, BTC/ETH mid prices and open-interest headroom, Barker's hosted fee and size limits. Pass margin (USDC per leg) with optional leverage / stop_pct / take_pct / budget to get a cost estimate (USDC per PAPER, loss and PAPER per stop). Read-only; the user starts the strategy at app.barker.money/paper. (paid: $0.001 per call via x402)

  Parameters:

  • budget — number — USDC loss budget; default 5 × margin
  • margin — number — USDC margin per leg; enables the estimate
  • market — string — BTC or ETH; omit for all
  • leverage — integer
  • stop_pct — number — stop-loss distance in %, e.g. 0.3
  • take_pct — number — take-profit distance in %, e.g. 0.6

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.