SBOR

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Check a lending rate before your agent borrows. Bitcoin-backed dollar rates from contracts. No key.

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compare_chains Read-only

The same asset classes on the largest lending markets on Ethereum, Base, Hyperliquid and Solana, plus SOFR, the US repo rate, and what it costs to borrow dollars against bitcoin. Context only: none of these is ever a constituent of an SBOR index. Every rate is read from the venues' contracts (Aave on Ethereum and Base, HyperLend on Hyperliquid, Kamino on Solana, Morpho for the bitcoin-collateral markets); DefiLlama picks the largest market per chain, gives its size, and stands in only if a read fails.

indexstring

Only markets comparable to this index. Omit for all.

Tools (6)

compare_chains

read-only

Argument	Type	Description
index	string	Only markets comparable to this index. Omit for all.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "index": {
      "enum": [
        "SBOR-USD",
        "SBOR-BTC",
        "SBOR-STX"
      ],
      "type": "string",
      "description": "Only markets comparable to this index. Omit for all."
    }
  },
  "additionalProperties": false
}

compare_rate

Given a rate you have been offered, say whether it is above or below the market for that currency, and by how much. This is the main reason SBOR exists. Recommended use: if a borrow offer is more than 50 basis points above the benchmark, stop and ask a human. Use SBOR to stop, never to start. For a dollar loan against bitcoin, compare with that stablecoin's rate (for example BTC-COLLATERAL-USDC) where one is published, else with BTC-COLLATERAL-USD; for lending on Stacks against other collateral, with the index for the currency. This tool refuses rather than guesses: an error result means there is no trustworthy answer, not that the rate is bad.

read-only

Argument	Type	Description
rate*	number	The rate offered, as a percentage between 0 and 100. 4.2 means 4.2%, not 0.042.
side*	string	Whether you would be borrowing or supplying.
index*	string	Which benchmark: BTC-COLLATERAL-USD or BTC-COLLATERAL-<stablecoin> for borrowing dollars against bitcoin, or a Stacks currency index.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "rate",
    "side",
    "index"
  ],
  "properties": {
    "rate": {
      "type": "number",
      "maximum": 100,
      "description": "The rate offered, as a percentage between 0 and 100. 4.2 means 4.2%, not 0.042.",
      "exclusiveMinimum": 0
    },
    "side": {
      "enum": [
        "borrow",
        "supply"
      ],
      "type": "string",
      "description": "Whether you would be borrowing or supplying."
    },
    "index": {
      "enum": [
        "SBOR-USD",
        "SBOR-BTC",
        "SBOR-STX",
        "BTC-COLLATERAL-USD",
        "BTC-COLLATERAL-USDC",
        "BTC-COLLATERAL-USDT",
        "BTC-COLLATERAL-RLUSD",
        "BTC-COLLATERAL-PYUSD",
        "BTC-COLLATERAL-USD1"
      ],
      "type": "string",
      "description": "Which benchmark: BTC-COLLATERAL-USD or BTC-COLLATERAL-<stablecoin> for borrowing dollars against bitcoin, or a Stacks currency index."
    }
  },
  "additionalProperties": false
}

get_history

Daily fixings since each rate began. Use this to see whether a rate is unusual, or how the cost of capital has moved. Means are given per methodology version, never across a change in how the number is built.

read-only

Argument	Type	Description
days	integer	How many days back, up to 200. Default 30.
index*	string	A Stacks currency index, BTC-COLLATERAL-USD (from 14 October 2026), or BTC-COLLATERAL-<stablecoin>.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "index"
  ],
  "properties": {
    "days": {
      "type": "integer",
      "maximum": 200,
      "minimum": 1,
      "description": "How many days back, up to 200. Default 30."
    },
    "index": {
      "enum": [
        "SBOR-USD",
        "SBOR-BTC",
        "SBOR-STX",
        "BTC-COLLATERAL-USD",
        "BTC-COLLATERAL-USDC",
        "BTC-COLLATERAL-USDT",
        "BTC-COLLATERAL-RLUSD",
        "BTC-COLLATERAL-PYUSD",
        "BTC-COLLATERAL-USD1"
      ],
      "type": "string",
      "description": "A Stacks currency index, BTC-COLLATERAL-USD (from 14 October 2026), or BTC-COLLATERAL-<stablecoin>."
    }
  },
  "additionalProperties": false
}

get_methodology

The full methodology and integration policy: how the fixing is built, what is excluded and why, and what SBOR will and will not do. Read this before quoting a rate in anything that matters.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

get_rate

SBOR's benchmark borrow and supply rates, read from lending contract state: BTC-COLLATERAL-USD, what it costs to borrow dollars against bitcoin, with a rate per stablecoin (from 14 October 2026), and the currency indices for lending on Stacks. Use this to judge whether a lending offer is good: borrowing above the SBOR borrow rate means paying more than the market, supplying below the supply rate means earning less. Returns every currency index unless one is named. Always read the freshness line first.

read-only

Argument	Type	Description
index	string	BTC-COLLATERAL-USD for borrowing any dollar stablecoin against bitcoin, BTC-COLLATERAL-<stablecoin> for one stablecoin, or a Stacks currency index. Omit for all of them.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "index": {
      "enum": [
        "SBOR-USD",
        "SBOR-BTC",
        "SBOR-STX",
        "BTC-COLLATERAL-USD",
        "BTC-COLLATERAL-USDC",
        "BTC-COLLATERAL-USDT",
        "BTC-COLLATERAL-RLUSD",
        "BTC-COLLATERAL-PYUSD",
        "BTC-COLLATERAL-USD1"
      ],
      "type": "string",
      "description": "BTC-COLLATERAL-USD for borrowing any dollar stablecoin against bitcoin, BTC-COLLATERAL-<stablecoin> for one stablecoin, or a Stacks currency index. Omit for all of them."
    }
  },
  "additionalProperties": false
}

list_markets

Every venue and asset in an index, with its borrow rate, supply rate, utilization, depth and weight. Utilization explains why a rate sits where it does.

read-only

Argument	Type	Description
index	string	BTC-COLLATERAL-USD, BTC-COLLATERAL-<stablecoin>, or a Stacks currency index. Omit for the Stacks indices.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "index": {
      "enum": [
        "SBOR-USD",
        "SBOR-BTC",
        "SBOR-STX",
        "BTC-COLLATERAL-USD",
        "BTC-COLLATERAL-USDC",
        "BTC-COLLATERAL-USDT",
        "BTC-COLLATERAL-RLUSD",
        "BTC-COLLATERAL-PYUSD",
        "BTC-COLLATERAL-USD1"
      ],
      "type": "string",
      "description": "BTC-COLLATERAL-USD, BTC-COLLATERAL-<stablecoin>, or a Stacks currency index. Omit for the Stacks indices."
    }
  },
  "additionalProperties": false
}