# money.barker/stablecoin-yield (remote · mcp.barker.money)

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

- Trust score: 60/100 (medium)
- Change this week: +2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `mcp.barker.money`: 60/100 (this document), [markdown](https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp.md), [page](https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp)

## Channel facts

- Endpoint: `https://mcp.barker.money/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.4`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 11 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS not yet verified: we couldn't determine whether a plaintext access path exists.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 66/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1975 tokens (~179/item across 11 items; 11 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 96/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 87% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http money-barker-stablecoin-yield https://mcp.barker.money/mcp
```

### Codex

```toml
[mcp_servers.money-barker-stablecoin-yield]
url = "https://mcp.barker.money/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "money-barker-stablecoin-yield": {
      "type": "remote",
      "url": "https://mcp.barker.money/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add money-barker-stablecoin-yield --url https://mcp.barker.money/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  money-barker-stablecoin-yield:
    url: "https://mcp.barker.money/mcp"
```

### Other

```json
{
  "mcpServers": {
    "money-barker-stablecoin-yield": {
      "type": "http",
      "url": "https://mcp.barker.money/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 59, 0)

- [functional regression] Schema quality: 161 → 179

### 2026-07-31 (score 59, −2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-29 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 59, +1)

- [functional] Schema quality: good → excellent

### 2026-07-27 (score 58, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 58)

First indexed and scored.

## MCP tools (11)

### `barker_defi_vaults` (~225 tokens)

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 parameters:

- `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)
- `sort` (string): Sort key

### `barker_market_overview` (~81 tokens)

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)

### `barker_market_trend` (~94 tokens)

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 parameters:

- `days` (integer): Lookback window in days (default 30)

### `barker_yield_advisor` (~216 tokens)

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 parameters:

- `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)
- `risk` (string): Risk band → TVL floor $10M/$1M/$100K

### `barker_pool_detail` (~89 tokens)

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 parameters:

- `pool_uid` (string, required): Pool uid from list tools

### `barker_pool_history` (~93 tokens)

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 parameters:

- `days` (integer)
- `pool_uid` (string, required)

### `barker_pool_search` (~70 tokens)

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 parameters:

- `keyword` (string, required)
- `limit` (integer)

### `barker_crosschain_routes` (~85 tokens)

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 parameters:

- `from_chain` (string): Origin chain (lowercase)
- `symbol` (string): Stablecoin symbol (lowercase)

### `barker_executable_pools` (~287 tokens)

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 parameters:

- `action` (string): Filter by executable action
- `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)
- `min_tvl` (number): Min TVL floor in USD (default 1000000)
- `query` (string): Optional pool keyword, e.g. 'Steakhouse USDC'

### `barker_execution_quote` (~499 tokens)

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 parameters:

- `action` (string): Default deposit
- `amount_base_units` (string, required): Integer amount in token decimals (1 USDC = 1000000). For redeem: underlying assets to withdraw.
- `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, required): 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 exact…
- `signer_address` (string, required): EVM address that will sign AND receive vault shares / redeemed assets. Required.
- `slippage` (number): Optional slippage tolerance, e.g. 0.005

### `barker_vault_position` (~236 tokens)

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 parameters:

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

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp#diagnostics

## Score history

- 2026-08-03: 60
- 2026-08-02: 60
- 2026-08-01: 59
- 2026-07-31: 59
- 2026-07-30: 61
- 2026-07-29: 60
- 2026-07-28: 59
- 2026-07-27: 58
- 2026-07-26: 58

## Links

- Remote endpoint: https://mcp.barker.money/mcp
- Repository: https://github.com/barkermoney/barker-mcp
- Website: https://barker.money/
- Changelog RSS feed: https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/money-barker-stablecoin-yield/mcp