{ "data": { "tool": { "category": "payment-platforms", "endpoint": "https://mcp.barker.money/mcp", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/barker-stablecoin-yield.json", "kind": "mcp", "listed": "indexed", "liveUrl": "https://www.anchorterminal.com/api/v1/live/barker-stablecoin-yield.json", "markdownUrl": "https://www.anchorterminal.com/tools/barker-stablecoin-yield.md", "mcpTools": { "check": { "checker": "anchor-check/1.0", "totalTokens": 2464, "counts": { "error": 0, "note": 1, "warn": 13 }, "findings": [ { "rule": "TC11", "severity": "warn", "tool": "barker_pool_history", "message": "none of its 2 parameters has a description", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "barker_pool_search", "message": "none of its 2 parameters has a description", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC16", "severity": "warn", "tool": "barker_crosschain_routes", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_defi_vaults", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_executable_pools", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_execution_quote", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_market_overview", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_market_trend", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_pool_detail", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_pool_history", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_pool_search", "message": "no readOnlyHint or destructiveHint", "fix": "Its name starts with \"search\"; if it only reads, set readOnlyHint: true so harnesses can run it without asking." }, { "rule": "TC16", "severity": "warn", "tool": "barker_vault_position", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC16", "severity": "warn", "tool": "barker_yield_advisor", "message": "no readOnlyHint or destructiveHint", "fix": "Set readOnlyHint: true if it only reads; otherwise set destructiveHint and idempotentHint." }, { "rule": "TC24", "severity": "note", "message": "11 of 11 tools have no outputSchema", "fix": "Declare outputSchema for tools that return structured data, and return structuredContent that matches it." } ] }, "checkedAt": "2026-10-04T22:25:32Z", "count": 11, "schemaTokens": 2464, "status": "ok", "tools": [ { "name": "barker_defi_vaults", "description": "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)", "inputSchema": { "properties": { "asset": { "description": "Stablecoin symbol (lowercase): usdt, usdc, dai, usde, usds, fdusd, gho, crvusd, pyusd, sdai, frxusd, tusd, lusd, dola, etc.", "type": "string" }, "chain": { "description": "Chain name (lowercase): ethereum, bsc, arbitrum, base, polygon, optimism, avalanche, solana, etc.", "type": "string" }, "limit": { "description": "Row count (default 50, max 100)", "maximum": 100, "minimum": 1, "type": "integer" }, "sort": { "description": "Sort key", "enum": [ "apy", "tvl" ], "type": "string" } }, "type": "object" } }, { "name": "barker_market_overview", "description": "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)", "inputSchema": { "properties": {}, "type": "object" } }, { "name": "barker_market_trend", "description": "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)", "inputSchema": { "properties": { "days": { "description": "Lookback window in days (default 30)", "maximum": 180, "minimum": 7, "type": "integer" } }, "type": "object" } }, { "name": "barker_yield_advisor", "description": "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)", "inputSchema": { "properties": { "asset": { "description": "Stablecoin symbol (lowercase): usdt, usdc, dai, usde, ...", "type": "string" }, "chain": { "description": "Optional chain filter (lowercase)", "type": "string" }, "limit": { "description": "Top-N picks (default 5)", "maximum": 20, "minimum": 1, "type": "integer" }, "min_tvl": { "description": "Optional explicit TVL floor (USD)", "type": "number" }, "risk": { "description": "Risk band → TVL floor $10M/$1M/$100K", "enum": [ "conservative", "balanced", "aggressive" ], "type": "string" } }, "type": "object" } }, { "name": "barker_pool_detail", "description": "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)", "inputSchema": { "properties": { "pool_uid": { "description": "Pool uid from list tools", "type": "string" } }, "required": [ "pool_uid" ], "type": "object" } }, { "name": "barker_pool_history", "description": "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)", "inputSchema": { "properties": { "days": { "maximum": 180, "minimum": 7, "type": "integer" }, "pool_uid": { "type": "string" } }, "required": [ "pool_uid" ], "type": "object" } }, { "name": "barker_pool_search", "description": "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)", "inputSchema": { "properties": { "keyword": { "type": "string" }, "limit": { "maximum": 50, "minimum": 1, "type": "integer" } }, "required": [ "keyword" ], "type": "object" } }, { "name": "barker_crosschain_routes", "description": "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)", "inputSchema": { "properties": { "from_chain": { "description": "Origin chain (lowercase)", "type": "string" }, "symbol": { "description": "Stablecoin symbol (lowercase)", "type": "string" } }, "required": [ "from_chain", "symbol" ], "type": "object" } }, { "name": "barker_executable_pools", "description": "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)", "inputSchema": { "properties": { "action": { "description": "Filter by executable action", "enum": [ "deposit", "redeem" ], "type": "string" }, "asset": { "description": "Optional stablecoin symbol filter, case-insensitive: usdc, usdt. Omit to list all assets.", "type": "string" }, "chain": { "description": "Optional chain filter (lowercase), e.g. base, ethereum", "type": "string" }, "limit": { "description": "Max rows (default 20)", "maximum": 100, "minimum": 1, "type": "integer" }, "min_tvl": { "description": "Min TVL floor in USD (default 1000000)", "type": "number" }, "query": { "description": "Optional pool keyword, e.g. 'Steakhouse USDC'", "type": "string" } }, "type": "object" } }, { "name": "barker_execution_quote", "description": "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)", "inputSchema": { "properties": { "action": { "description": "Default deposit", "enum": [ "deposit", "redeem" ], "type": "string" }, "amount": { "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.", "type": "string" }, "amount_base_units": { "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).", "type": "string" }, "chain_id": { "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.", "type": "integer" }, "pool_uid": { "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.", "type": "string" }, "signer_address": { "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.", "type": "string" }, "slippage": { "description": "Optional slippage tolerance, e.g. 0.005", "type": "number" } }, "required": [ "pool_uid", "amount_base_units", "signer_address" ], "type": "object" } }, { "name": "barker_vault_position", "description": "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)", "inputSchema": { "properties": { "address": { "description": "EVM wallet address holding the vault shares (0x + 40 hex)", "type": "string" }, "pool_uid": { "description": "Barker pool uid of the ERC-4626 vault, e.g. morpho-vault_base_usdc_0xee8f4ec5 (from barker_executable_pools)", "type": "string" } }, "required": [ "address", "pool_uid" ], "type": "object" } } ] }, "name": "stablecoin-yield", "note": "Indexed from the official MCP registry: facts and our own checks, not reviewed, so no score, grade or rank.", "packages": null, "pageJsonUrl": "https://www.anchorterminal.com/tools/barker-stablecoin-yield.json", "popularity": { "githubStars": 3 }, "registryName": "money.barker/stablecoin-yield", "remotes": [ { "type": "streamable-http", "url": "https://mcp.barker.money/mcp" } ], "repository": "https://github.com/barkermoney/barker-mcp", "reviewed": false, "slug": "barker-stablecoin-yield", "source": "the official MCP registry", "sourceUrl": "https://registry.modelcontextprotocol.io/v0.1/servers?search=money.barker/stablecoin-yield", "summary": "Barker's real-time stablecoin yield index + AI advisor + non-custodial deposit/redeem (x402 paid).", "updatedAt": "2026-08-01T10:45:02Z", "url": "https://www.anchorterminal.com/tools/barker-stablecoin-yield", "vendor": "barker.money", "vendorUrl": "https://barker.money", "version": "1.0.4", "websiteUrl": "https://barker.money", "where": "hosted", "why": [ "vendor" ] } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/tools/barker-stablecoin-yield", "json": "https://www.anchorterminal.com/tools/barker-stablecoin-yield.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/tools/barker-stablecoin-yield.md", "slim": "https://www.anchorterminal.com/tools/barker-stablecoin-yield.min.md" }, "markdown": "# stablecoin-yield\n\n\u003e Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/\n\n- Kind: MCP server, by barker.money (https://barker.money)\n- Category: Payment \u0026 monetisation platforms (https://www.anchorterminal.com/categories/payment-platforms.md)\n- Listed because: It's published in the registry under barker.money, a namespace the registry only gives to whoever proves they control that domain.\n- What the official MCP registry says: Barker's real-time stablecoin yield index + AI advisor + non-custodial deposit/redeem (x402 paid).\n\n## Facts\n\n- MCP registry: `money.barker/stablecoin-yield` 1.0.4\n- Endpoint: https://mcp.barker.money/mcp (streamable HTTP)\n- Source: https://github.com/barkermoney/barker-mcp\n- Website: https://barker.money\n- GitHub stars: 3\n- Registry entry updated: 2026-08-01\n\n## Tools\n\n- Tools it lists (11, about 2,464 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:25 UTC):\n - `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,…\n - `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…\n - `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…\n - `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…\n - `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…\n - `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…\n - `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…\n - `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…\n - `barker_executable_pools`: EXECUTION DISCOVERY: which stablecoin vaults in Barker's index support direct deposit/redeem through barker_execution_quote. Returns executable pools with…\n - `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…\n - `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 /…\n- How its tools read to an agent (0 errors, 13 warnings, 1 note, about 2,464 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):\n - warn TC11 barker_pool_history: none of its 2 parameters has a description\n - warn TC11 barker_pool_search: none of its 2 parameters has a description\n - warn TC16 barker_crosschain_routes: no readOnlyHint or destructiveHint\n - warn TC16 barker_defi_vaults: no readOnlyHint or destructiveHint\n - warn TC16 barker_executable_pools: no readOnlyHint or destructiveHint\n - warn TC16 barker_execution_quote: no readOnlyHint or destructiveHint\n - warn TC16 barker_market_overview: no readOnlyHint or destructiveHint\n - warn TC16 barker_market_trend: no readOnlyHint or destructiveHint\n - warn TC16 barker_pool_detail: no readOnlyHint or destructiveHint\n - warn TC16 barker_pool_history: no readOnlyHint or destructiveHint\n - warn TC16 barker_pool_search: no readOnlyHint or destructiveHint\n - warn TC16 barker_vault_position: no readOnlyHint or destructiveHint\n - warn TC16 barker_yield_advisor: no readOnlyHint or destructiveHint\n - note TC24 server: 11 of 11 tools have no outputSchema\n\n- JSON: https://www.anchorterminal.com/api/v1/tools/barker-stablecoin-yield.json\n- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-05", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.3", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Terminal", "url": "https://www.anchorterminal.com/tools/" }, { "name": "Indexed", "url": "https://www.anchorterminal.com/indexed/" }, { "name": "stablecoin-yield", "url": "" } ], "description": "stablecoin-yield, an MCP server by barker.money, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Barker's real-time stablecoin yield index + AI advisor + non-custodial deposit/redeem (x402 paid).", "facts": [ "not reviewed", "not ranked", "facts only" ], "h1": "stablecoin-yield", "image": "https://www.anchorterminal.com/assets/og/indexed.png", "path": "/tools/barker-stablecoin-yield", "published": "", "section": "indexed", "title": "stablecoin-yield: MCP server, indexed from the official MCP registry", "toc": null, "updated": "2026-10-05", "url": "https://www.anchorterminal.com/tools/barker-stablecoin-yield" }, "tokens": { "markdown": 1300, "slim": 1230 }, "version": 1 }