MCP Server
stablecoin-yield
money.barker/stablecoin-yield
What this MCP does
Provides stablecoin yield data, market analysis, recommendations, cross-chain routes, and unsigned vault deposit or redemption transactions.
Capabilities
Tools
11
tools
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)
Input schema
{'type': 'object', 'required': ['from_chain', 'symbol'], 'properties': {'symbol': {'type': 'string', 'description': 'Stablecoin symbol (lowercase)'}, 'from_chain': {'type': 'string', 'description': 'Origin chain (lowercase)'}}}
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)
Input schema
{'type': 'object', 'properties': {'sort': {'enum': ['apy', 'tvl'], 'type': 'string', 'description': 'Sort key'}, 'asset': {'type': 'string', 'description': 'Stablecoin symbol (lowercase): usdt, usdc, dai, usde, usds, fdusd, gho, crvusd, pyusd, sdai, frxusd, tusd, lusd, dola, etc.'}, 'chain': {'type': 'string', 'description': 'Chain name (lowercase): ethereum, bsc, arbitrum, base, polygon, optimism, avalanche, solana, etc.'}, 'limit': {'type': 'integer', 'maximum': 100, 'minimum': 1, 'description': 'Row count (default 50, max 100)'}}}
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)
Input schema
{'type': 'object', 'properties': {'asset': {'type': 'string', 'description': 'Optional stablecoin symbol filter, case-insensitive: usdc, usdt. Omit to list all assets.'}, 'chain': {'type': 'string', 'description': 'Optional chain filter (lowercase), e.g. base, ethereum'}, 'limit': {'type': 'integer', 'maximum': 100, 'minimum': 1, 'description': 'Max rows (default 20)'}, 'query': {'type': 'string', 'description': "Optional pool keyword, e.g. 'Steakhouse USDC'"}, 'action': {'enum': ['deposit', 'redeem'], 'type': 'string', 'description': 'Filter by executable action'}, 'min_tvl': {'type': 'number', 'description': 'Min TVL floor in USD (default 1000000)'}}}
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)
Input schema
{'type': 'object', 'required': ['pool_uid', 'amount_base_units', 'signer_address'], 'properties': {'action': {'enum': ['deposit', 'redeem'], 'type': 'string', 'description': 'Default deposit'}, 'amount': {'type': 'string', 'description': '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': {'type': 'integer', 'description': '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.'}, 'pool_uid': {'type': 'string', 'description': '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.'}, 'slippage': {'type': 'number', 'description': 'Optional slippage tolerance, e.g. 0.005'}, 'signer_address': {'type': 'string', 'description': '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.'}, 'amount_base_units': {'type': 'string', 'description': '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).'}}}
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)
Input schema
{'type': 'object', 'properties': {}}
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)
Input schema
{'type': 'object', 'properties': {'days': {'type': 'integer', 'maximum': 180, 'minimum': 7, 'description': 'Lookback window in days (default 30)'}}}
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)
Input schema
{'type': 'object', 'required': ['pool_uid'], 'properties': {'pool_uid': {'type': 'string', 'description': 'Pool uid from list tools'}}}
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)
Input schema
{'type': 'object', 'required': ['pool_uid'], 'properties': {'days': {'type': 'integer', 'maximum': 180, 'minimum': 7}, 'pool_uid': {'type': 'string'}}}
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)
Input schema
{'type': 'object', 'required': ['keyword'], 'properties': {'limit': {'type': 'integer', 'maximum': 50, 'minimum': 1}, 'keyword': {'type': 'string'}}}
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)
Input schema
{'type': 'object', 'required': ['address', 'pool_uid'], 'properties': {'address': {'type': 'string', 'description': 'EVM wallet address holding the vault shares (0x + 40 hex)'}, 'pool_uid': {'type': 'string', 'description': 'Barker pool uid of the ERC-4626 vault, e.g. morpho-vault_base_usdc_0xee8f4ec5 (from barker_executable_pools)'}}}
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)
Input schema
{'type': 'object', 'properties': {'risk': {'enum': ['conservative', 'balanced', 'aggressive'], 'type': 'string', 'description': 'Risk band → TVL floor $10M/$1M/$100K'}, 'asset': {'type': 'string', 'description': 'Stablecoin symbol (lowercase): usdt, usdc, dai, usde, ...'}, 'chain': {'type': 'string', 'description': 'Optional chain filter (lowercase)'}, 'limit': {'type': 'integer', 'maximum': 20, 'minimum': 1, 'description': 'Top-N picks (default 5)'}, 'min_tvl': {'type': 'number', 'description': 'Optional explicit TVL floor (USD)'}}}
History
Recent tool changes
Added
barker_vault_position
Sept. 17, 2026, 12:54 p.m.
Added
barker_execution_quote
Sept. 17, 2026, 12:54 p.m.
Added
barker_executable_pools
Sept. 17, 2026, 12:54 p.m.
Added
barker_crosschain_routes
Sept. 17, 2026, 12:54 p.m.
Added
barker_pool_search
Sept. 17, 2026, 12:54 p.m.
Added
barker_pool_history
Sept. 17, 2026, 12:54 p.m.
Added
barker_pool_detail
Sept. 17, 2026, 12:54 p.m.
Added
barker_yield_advisor
Sept. 17, 2026, 12:54 p.m.
Added
barker_market_trend
Sept. 17, 2026, 12:54 p.m.
Added
barker_market_overview
Sept. 17, 2026, 12:54 p.m.
Added
barker_defi_vaults
Sept. 17, 2026, 12:54 p.m.
Discover
Similar MCP servers
The Stall
ai.intuitek.the-stall/the-stall
Provides pay-per-call tools for YouTube keyword research and research on stocks, crypto, DeFi, options, and macroeconomic data.
Crank Protocol
ing.crank/crank
Provides non-custodial Solana and EVM tools for swaps, derivatives, lending, staking, tokenized equities, bridging, and strategy …
x402-services
ai.firmbrain/x402-services
Provides on-chain, trading, and AI tools for Robinhood Chain.
FortFi Treasury MCP
io.github.rebelArtists/fortfi-treasury-mcp
Provides policy-controlled crypto treasury operations across chains, including wallets, payments, token discovery, swaps, bridges…
DeltaSignal ATLAS-7
io.github.aitrailblazer/deltasignal-atlas-7
Analyzes SEC and XBRL data for crypto-related public companies, including fundamentals, issuer signals, peer comparisons, stress …
intel
io.chainhelix/intel
Provides multi-chain market intelligence, blockchain activity metrics, trading and portfolio planning, sanctions clearance, agent…
TradingCalc MCP: Options, Forex, Risk Stats, Prediction Markets, On-Chain & Crypto Futures
io.github.SKalinin909/tradingcalc
Performs deterministic calculations for crypto futures, funding, leverage, liquidation, position sizing, token swaps, on-chain ri…
Market Intelligence API
com.marketintelligenceapi.api/market-intelligence
Analyzes crypto and tokenized-asset markets using DEX flows, perpetual positioning, smart-money activity, token risk, market news…