Barker's real-time stablecoin yield index + AI advisor + non-custodial deposit/redeem (x402 paid).
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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)
Stablecoin symbol (lowercase)
Origin chain (lowercase)
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
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)
| Argument | Type | Description |
|---|---|---|
| symbol* | string | Stablecoin symbol (lowercase) |
| from_chain* | string | Origin chain (lowercase) |
{
"type": "object",
"required": [
"from_chain",
"symbol"
],
"properties": {
"symbol": {
"type": "string",
"description": "Stablecoin symbol (lowercase)"
},
"from_chain": {
"type": "string",
"description": "Origin chain (lowercase)"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| 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) |
{
"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)"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| 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) |
{
"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)"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| 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. |
| pool_uid* | 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. |
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)
No arguments.
{
"type": "object",
"properties": {}
}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)
| Argument | Type | Description |
|---|---|---|
| days | integer | Lookback window in days (default 30) |
{
"type": "object",
"properties": {
"days": {
"type": "integer",
"maximum": 180,
"minimum": 7,
"description": "Lookback window in days (default 30)"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| 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 |
{
"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"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| pool_uid* | string | Pool uid from list tools |
{
"type": "object",
"required": [
"pool_uid"
],
"properties": {
"pool_uid": {
"type": "string",
"description": "Pool uid from list tools"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| days | integer | |
| pool_uid* | string |
{
"type": "object",
"required": [
"pool_uid"
],
"properties": {
"days": {
"type": "integer",
"maximum": 180,
"minimum": 7
},
"pool_uid": {
"type": "string"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| limit | integer | |
| keyword* | string |
{
"type": "object",
"required": [
"keyword"
],
"properties": {
"limit": {
"type": "integer",
"maximum": 50,
"minimum": 1
},
"keyword": {
"type": "string"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM wallet address holding the vault shares (0x + 40 hex) |
| pool_uid* | string | Barker pool uid of the ERC-4626 vault, e.g. morpho-vault_base_usdc_0xee8f4ec5 (from barker_executable_pools) |
{
"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)"
}
}
}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)
| Argument | Type | Description |
|---|---|---|
| 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) |
{
"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)"
}
}
}| slippage | number | Optional slippage tolerance, e.g. 0.005 |
| signer_address* | 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. |
| amount_base_units* | 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). |
{
"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)."
}
}
}