DripMetrics

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Institutional-grade market microstructure, a cent at a time. x402: Base USDC or Robinhood USDG.

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compute_portfolio_var Read-only

Paid via x402 ($0.05 per request). Computes empirical and/or normal parametric VaR for a crypto portfolio. Provide either weights + portfolioValueUsd, or quantities. Invalid portfolios fail before payment.

assetsarray, required

Asset symbols, e.g. ["BTC", "ETH"].

windowstring

Price history window (default 180d).

horizonstring

Risk horizon, e.g. "1d" (default).

methodsstring

empirical, normal, or both (default).

weightsarray

Portfolio weights (with portfolioValueUsd).

confidencenumber

Confidence level (default 0.95).

quantitiesarray

Asset quantities (alternative to weights).

portfolioValueUsdnumber

Total portfolio value in USD.

Tools (6)

Tool list last changed Oct 25, 2026.

compute_portfolio_var

read-only

Argument	Type	Description
assets*	array	Asset symbols, e.g. ["BTC", "ETH"].
window	string	Price history window (default 180d).
horizon	string	Risk horizon, e.g. "1d" (default).
methods	string	empirical, normal, or both (default).
weights	array	Portfolio weights (with portfolioValueUsd).
confidence	number	Confidence level (default 0.95).
quantities	array	Asset quantities (alternative to weights).
portfolioValueUsd	number	Total portfolio value in USD.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "assets"
  ],
  "properties": {
    "assets": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "description": "Asset symbols, e.g. [\"BTC\", \"ETH\"]."
    },
    "window": {
      "enum": [
        "90d",
        "180d"
      ],
      "type": "string",
      "description": "Price history window (default 180d)."
    },
    "horizon": {
      "type": "string",
      "description": "Risk horizon, e.g. \"1d\" (default)."
    },
    "methods": {
      "enum": [
        "empirical",
        "normal",
        "both"
      ],
      "type": "string",
      "description": "empirical, normal, or both (default)."
    },
    "weights": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Portfolio weights (with portfolioValueUsd)."
    },
    "confidence": {
      "type": "number",
      "maximum": 0.999,
      "minimum": 0.5,
      "description": "Confidence level (default 0.95)."
    },
    "quantities": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Asset quantities (alternative to weights)."
    },
    "portfolioValueUsd": {
      "type": "number",
      "description": "Total portfolio value in USD.",
      "exclusiveMinimum": 0
    }
  },
  "additionalProperties": false
}

compute_spread_greeks

Paid via x402 ($0.05 per request). Nets Black-76 greeks across up to 6 Deribit BTC option legs and returns a spot×vol scenario P&L grid. Invalid legs or unknown instruments fail before payment.

read-only

Argument	Type	Description
legs*	array	Spread legs.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "legs"
  ],
  "properties": {
    "legs": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "instrument",
          "qty"
        ],
        "properties": {
          "qty": {
            "type": "number",
            "description": "Signed quantity in 1 BTC contracts; negative = short."
          },
          "instrument": {
            "type": "string",
            "description": "Deribit BTC option instrument, e.g. \"BTC-26SEP26-120000-C\"."
          }
        },
        "additionalProperties": false
      },
      "maxItems": 6,
      "minItems": 1,
      "description": "Spread legs."
    }
  },
  "additionalProperties": false
}

describe_metric

Free. Returns full details for one metric id from list_metrics: parameters, request/response schemas, price, and how to fetch it.

read-only

Argument	Type	Description
id*	string	Metric id from list_metrics, e.g. "metrics/vpin" or "options/gex".

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Metric id from list_metrics, e.g. \"metrics/vpin\" or \"options/gex\"."
    }
  },
  "additionalProperties": false
}

get_metric

Paid via x402 (up to $0.25 per request; exact price per metric in list_metrics). Fetches any GET metric by id with query parameters. Without payment this returns the x402 challenge in _meta["x402/error"]; x402-capable clients (e.g. withX402Client) sign it and retry with _meta["x402/payment"] automatically. Invalid requests fail before payment.

read-only

Argument	Type	Description
id*	string	Metric id from list_metrics, e.g. "metrics/vpin".
params	object	Query parameters, e.g. {"pair": "BTC-USD", "window": "1h"}. See describe_metric.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Metric id from list_metrics, e.g. \"metrics/vpin\"."
    },
    "params": {
      "type": "object",
      "description": "Query parameters, e.g. {\"pair\": \"BTC-USD\", \"window\": \"1h\"}. See describe_metric.",
      "additionalProperties": {
        "type": [
          "string",
          "number",
          "boolean"
        ]
      }
    }
  },
  "additionalProperties": false
}

get_payment_requirements

Free. Dry-runs a metric request without payment and returns the exact x402 challenge the API issues (accepted networks, asset, amount, payTo). Invalid parameters fail here before any payment.

read-only

Argument	Type	Description
id*	string	Metric id from list_metrics.
body	object	JSON body for POST metrics (portfolio VaR, spread greeks).
params	object	Query parameters for GET metrics (see describe_metric).

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Metric id from list_metrics."
    },
    "body": {
      "type": "object",
      "description": "JSON body for POST metrics (portfolio VaR, spread greeks).",
      "additionalProperties": {}
    },
    "params": {
      "type": "object",
      "description": "Query parameters for GET metrics (see describe_metric).",
      "additionalProperties": {
        "type": [
          "string",
          "number",
          "boolean"
        ]
      }
    }
  },
  "additionalProperties": false
}

list_metrics

Free. Lists every DripMetrics metric endpoint with its id, family, HTTP method, USD price, and summary. Use describe_metric for parameter details and get_metric (or the compute_* tools for POST endpoints) to fetch values. Paid fetches use x402 with USDC on Base or USDG on Robinhood Chain; discovery is free.

read-only

Argument	Type	Description
family	string	Optional family filter, e.g. "Exchange metrics" or "BTC options".

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "family": {
      "enum": [
        "Aerodrome",
        "BTC options",
        "Exchange metrics",
        "Hyperliquid",
        "Hyperliquid book",
        "Kraken xStocks",
        "Market summary",
        "On-chain",
        "Orderbook",
        "Polymarket",
        "Portfolio risk"
      ],
      "type": "string",
      "description": "Optional family filter, e.g. \"Exchange metrics\" or \"BTC options\"."
    }
  },
  "additionalProperties": false
}