Barker MCP
Barker provides a real-time stablecoin yield index and AI advisor, allowing agents to query vaults, search pools, and execute non-custodial deposits and redemptions across multiple chains and protocols via its MCP endpoint.
Endpoint and access
No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.
https://mcp.barker.money/mcpWhat its tools do
12 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.
Checks and signals
Each line is separate evidence, not a trust score.
- Passed Endpoint answered the live check ·
- Passed Official MCP Registry namespace is tied to barker.money ·
- Passed Endpoint is on the registry namespace domain ·
- Availability 1 of 1 checks passed in 30 days
What you can do with it
- Query real-time stablecoin yield data across DeFi protocols and CEXs
- Search for specific yield pools and view detailed history
- Execute non-custodial deposits and redemptions via x402 payments
- Get AI-driven yield advice and cross-chain route recommendations
Source and maintenance
- Maintenance checked
Protocol and capabilities
- Server
- barker-mcp 0.1.0
- MCP protocol negotiated in check
- 2025-11-25
- Tools
- 12 advertised
- Resources
- Not advertised
- Resource templates
- Not advertised
- Prompts
- Not advertised
{
"tools": {}
}Tools
12 advertised
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)
{
"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_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)
{
"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)
{
"type": "object",
"properties": {
"days": {
"type": "integer",
"maximum": 180,
"minimum": 7,
"description": "Lookback window in days (default 30)"
}
}
}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)
{
"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)"
}
}
}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)
{
"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)
{
"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)
{
"type": "object",
"required": [
"keyword"
],
"properties": {
"limit": {
"type": "integer",
"maximum": 50,
"minimum": 1
},
"keyword": {
"type": "string"
}
}
}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)
{
"type": "object",
"required": [
"from_chain",
"symbol"
],
"properties": {
"symbol": {
"type": "string",
"description": "Stablecoin symbol (lowercase)"
},
"from_chain": {
"type": "string",
"description": "Origin chain (lowercase)"
}
}
}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)
{
"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)
{
"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_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)
{
"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_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)
{
"type": "object",
"properties": {
"budget": {
"type": "number",
"description": "USDC loss budget; default 5 × margin"
},
"margin": {
"type": "number",
"minimum": 1,
"description": "USDC margin per leg; enables the estimate"
},
"market": {
"type": "string",
"description": "BTC or ETH; omit for all"
},
"leverage": {
"type": "integer",
"maximum": 100,
"minimum": 1
},
"stop_pct": {
"type": "number",
"description": "stop-loss distance in %, e.g. 0.3"
},
"take_pct": {
"type": "number",
"description": "take-profit distance in %, e.g. 0.6"
}
}
}Prompts
Not advertised
Resources
Not advertised
90-day uptime
A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.
- 2026-11-07: 1 of 1 checks answered
30-day availability
Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.
- Successful checks
- 1 of 1 (100%)
- Average latency
- 1409 ms
- 95th percentile latency
- 1409 ms
Maintenance history
Public check and source-refresh events. Editorial and ownership records remain private.
- · probe · passed · 1409 ms · metadata changed · 12 tool(s)
Connect from your client
Each snippet registers the same endpoint; pick the client you use.
Claude Code
claude mcp add --transport http barker-mcp https://mcp.barker.money/mcpCodex
codex mcp add barker-mcp --url https://mcp.barker.money/mcpCursor
{
"mcpServers": {
"barker-mcp": {
"url": "https://mcp.barker.money/mcp"
}
}
}Cline
{
"mcpServers": {
"barker-mcp": {
"type": "streamableHttp",
"url": "https://mcp.barker.money/mcp",
"disabled": false
}
}
}VS Code
{
"servers": {
"barker-mcp": {
"type": "http",
"url": "https://mcp.barker.money/mcp"
}
}
}Gemini CLI
gemini mcp add --transport http barker-mcp https://mcp.barker.money/mcpClaude Desktop
https://mcp.barker.money/mcpWindsurf
{
"mcpServers": {
"barker-mcp": {
"serverUrl": "https://mcp.barker.money/mcp"
}
}
}Let your agent find its tools
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Do you run Barker MCP?
Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.