Bullet Market-Data API

openapi: 3.1.0
info:
  title: Bullet Trading Account Market-Data API
  description: REST API for the Bullet exchange. Provides Binance FAPI-compatible endpoints for trading, account management, and market data.
  contact:
    name: Bullet
    url: https://bullet.xyz
  license:
    name: Proprietary
  version: 0.1.0
servers:
- url: /
  description: Current server
- url: https://tradingapi.mainnet.bullet.xyz
  description: Mainnet
- url: https://tradingapi.testnet.bullet.xyz
  description: Testnet
- url: https://tradingapi.staging.bullet.xyz
  description: Staging
tags:
- name: Market-Data
paths:
  /fapi/v1/borrowLendPools:
    get:
      tags:
      - Market-Data
      summary: Borrow Lend Pools - Doesnt exist in Binance
      operationId: borrow_lend_pools
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: false
        schema:
          type: string
      responses:
        '200':
          description: BorrowLendPools
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/BorrowLendPoolResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/depth:
    get:
      tags:
      - Market-Data
      summary: Get orderbook
      operationId: order_book
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: true
        schema:
          type: string
        example: BTC-USD
      - name: limit
        in: query
        description: Limit (default 20, max 1000)
        required: false
        schema:
          type: integer
          format: int32
          minimum: 0
        example: 20
      responses:
        '200':
          description: Order book
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OrderBook'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/exchangeInfo:
    get:
      tags:
      - Market-Data
      summary: Get current exchange trading rules and symbol information
      operationId: exchange_info
      responses:
        '200':
          description: Exchange information
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExchangeInfo'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/fundingInfo:
    get:
      tags:
      - Market-Data
      summary: Funding rate metadata (caps, intervals) per symbol
      operationId: funding_info
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Funding info
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/FundingInfo'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/fundingRate:
    get:
      tags:
      - Market-Data
      summary: Latest price for a symbol or symbols
      operationId: funding_rate
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Funding Rate
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/FundingRate'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/insuranceBalance:
    get:
      tags:
      - Market-Data
      summary: Query Insurance Fund Balance Snapshot
      operationId: insurance_balance
      responses:
        '200':
          description: Insurance Fund Balance Snapshot
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InsuranceBalance'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/openInterest:
    get:
      tags:
      - Market-Data
      summary: Open interest per market
      operationId: open_interest
      responses:
        '200':
          description: Open Interest
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/OpenInterest'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '503':
          description: Historical data service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/premiumIndex:
    get:
      tags:
      - Market-Data
      summary: Mark price, index price, and estimated funding rate per symbol
      operationId: premium_index
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Premium index
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/PremiumIndex'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/ticker/24hr:
    get:
      tags:
      - Market-Data
      summary: '24 hour rolling window price change statistics.

        returns all markets — no per-symbol filtering (intentional, dataset is small)'
      operationId: ticker_24hr
      responses:
        '200':
          description: 24hr ticker statistics
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Ticker24hr'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '503':
          description: Historical data service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/ticker/price:
    get:
      tags:
      - Market-Data
      summary: Latest price for a symbol or symbols
      operationId: ticker_price
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Price ticker
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/PriceTicker'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
  /fapi/v1/trades:
    get:
      tags:
      - Market-Data
      summary: Recent Trades List
      operationId: recent_trades
      parameters:
      - name: symbol
        in: query
        description: Symbol
        required: true
        schema:
          type: string
        example: BTC-USD
      - name: limit
        in: query
        description: Default 100; max 1000
        required: false
        schema:
          type: integer
          format: int32
        example: 100
      responses:
        '200':
          description: List of recent trades
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Trade'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '404':
          description: Market not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '502':
          description: Upstream service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
        '503':
          description: Historical data service unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorResponse'
components:
  schemas:
    InsuranceAsset:
      type: object
      required:
      - asset
      - marginBalance
      - updateTime
      properties:
        asset:
          type: string
        marginBalance:
          type: string
          format: decimal
        updateTime:
          type: integer
          format: int64
    OpenInterest:
      type: object
      description: open interest for a single market
      required:
      - symbol
      - openInterest
      - time
      properties:
        openInterest:
          type: string
          format: decimal
        symbol:
          type: string
        time:
          type: integer
          format: int64
    ExchangeInfo:
      type: object
      required:
      - rateLimits
      - assets
      - symbols
      - globalConfig
      properties:
        assets:
          type: array
          items:
            $ref: '#/components/schemas/Asset'
        chainHash:
          type:
          - string
          - 'null'
        chainInfo:
          oneOf:
          - type: 'null'
          - $ref: '#/components/schemas/ChainInfo'
        globalConfig:
          $ref: '#/components/schemas/GlobalConfigResponse'
        rateLimits:
          type: array
          items:
            $ref: '#/components/schemas/RateLimit'
        symbols:
          type: array
          items:
            $ref: '#/components/schemas/Symbol'
    FundingRate:
      type: object
      required:
      - symbol
      - fundingRate
      - fundingTime
      - markPrice
      properties:
        fundingRate:
          type: string
          format: decimal
        fundingTime:
          type: integer
          format: int64
        markPrice:
          type: string
          format: decimal
        symbol:
          type: string
    Symbol:
      type: object
      required:
      - marketId
      - symbol
      - pair
      - contractType
      - deliveryDate
      - onboardDate
      - status
      - baseAsset
      - baseAssetId
      - quoteAsset
      - marginAsset
      - pricePrecision
      - quantityPrecision
      - baseAssetPrecision
      - quotePrecision
      - underlyingType
      - underlyingSubType
      - settlePlan
      - triggerProtect
      - filters
      - orderTypes
      - timeInForce
      - liquidationFee
      - marketTakeBound
      - makerFeeBps
      - takerFeeBps
      properties:
        baseAsset:
          type: string
        baseAssetId:
          type: integer
          format: uint16
          minimum: 0
        baseAssetPrecision:
          type: integer
          format: uint8
          minimum: 0
        contractType:
          type: string
        deliveryDate:
          type: integer
          format: int64
        filters:
          type: array
          items:
            $ref: '#/components/schemas/Filter'
        liquidationFee:
          type: string
          format: decimal
        makerFeeBps:
          type: array
          items:
            type: string
        marginAsset:
          type: string
        marketId:
          type: integer
          format: uint16
          minimum: 0
        marketTakeBound:
          type: string
          format: decimal
        onboardDate:
          type: integer
          format: int64
        orderTypes:
          type: array
          items:
            type: string
        pair:
          type: string
        pricePrecision:
          type: integer
          format: uint8
          minimum: 0
        quantityPrecision:
          type: integer
          format: uint8
          minimum: 0
        quoteAsset:
          type: string
        quotePrecision:
          type: integer
          format: uint8
          minimum: 0
        settlePlan:
          type: integer
          format: int32
        status:
          type: string
        symbol:
          type: string
        takerFeeBps:
          type: array
          items:
            type: string
        timeInForce:
          type: array
          items:
            type: string
        triggerProtect:
          type: string
          format: decimal
        underlyingSubType:
          type: array
          items:
            type: string
        underlyingType:
          type: string
    FundingInfo:
      type: object
      description: funding rate metadata per symbol
      required:
      - symbol
      - adjustedFundingRateCap
      - adjustedFundingRateFloor
      - fundingIntervalHours
      properties:
        adjustedFundingRateCap:
          type: string
          format: decimal
        adjustedFundingRateFloor:
          type: string
          format: decimal
        fundingIntervalHours:
          type: integer
          format: int32
          minimum: 0
        symbol:
          type: string
    PriceTicker:
      type: object
      required:
      - symbol
      - price
      - time
      properties:
        price:
          type: string
          format: decimal
        symbol:
          type: string
        time:
          type: integer
          format: int64
    ChainInfo:
      type: object
      description: chain-level constants from the rollup
      required:
      - chainId
      - chainName
      - gasTokenId
      - hyperlaneDomain
      - addressPrefix
      properties:
        addressPrefix:
          type: string
        chainId:
          type: integer
          format: uint64
          minimum: 0
        chainName:
          type: string
        gasTokenId:
          type: string
        hyperlaneDomain:
          type: integer
          format: uint64
          minimum: 0
    RateParams:
      type: object
      required:
      - optimal_utilisation_rate
      - min_borrow_rate
      - optimal_borrow_rate
      - max_borrow_rate
      properties:
        max_borrow_rate:
          type: string
          format: decimal
        min_borrow_rate:
          type: string
          format: decimal
        optimal_borrow_rate:
          type: string
          format: decimal
        optimal_utilisation_rate:
          type: string
          format: decimal
    Trade:
      type: object
      required:
      - id
      - price
      - qty
      - quoteQty
      - time
      - isBuyerMaker
      properties:
        id:
          type: integer
          format: int64
        isBuyerMaker:
          type: boolean
        price:
          type: string
          format: decimal
        qty:
          type: string
          format: decimal
        quoteQty:
          type: string
          format: decimal
        time:
          type: integer
          format: int64
    BorrowLendPoolResponse:
      type: object
      required:
      - asset
      - assetId
      - isActive
      - lastUpdateTimestamp
      - rateParams
      - depositLimit
      - borrowLimit
      - availableAmount
      - borrowedAmount
      - cumulativeDepositRate
      - cumulativeBorrowRate
      - accumulatedProtocolFees
      - unclaimedProtocolFees
      - interestFeeTenthBps
      properties:
        accumulatedProtocolFees:
          type: string
          format: decimal
        asset:
          type: string
        assetId:
          type: integer
          format: uint16
          minimum: 0
        availableAmount:
          type: string
          format: decimal
        borrowLimit:
          type: string
          format: decimal
        borrowedAmount:
          type: string
          format: decimal
        cumulativeBorrowRate:
          type: string
          format: decimal
        cumulativeDepositRate:
          type: string
          format: decimal
        depositLimit:
          type: string
          format: decimal
        interestFeeTenthBps:
          type: integer
          format: uint64
          minimum: 0
        isActive:
          type: boolean
        lastUpdateTimestamp:
          type: integer
          format: int64
        rateParams:
          $ref: '#/components/schemas/RateParams'
        unclaimedProtocolFees:
          type: string
          format: decimal
    GlobalConfigResponse:
      type: object
      required:
      - maxOrdersPerUser
      - maxTriggerOrdersPerUser
      - maxTriggerOrdersToExecutePerMsg
      - minNotionalTwapValue
      - minNotionalTwapValuePerOrder
      - twapExecutionIntervalSeconds
      properties:
        maxOrdersPerUser:
          type: integer
          format: uint16
          minimum: 0
        maxTriggerOrdersPerUser:
          type: integer
          format: uint16
          minimum: 0
        maxTriggerOrdersToExecutePerMsg:
          type: integer
          format: uint16
          minimum: 0
        minNotionalTwapValue:
          type: string
          format: decimal
        minNotionalTwapValuePerOrder:
          type: string
          format: decimal
        twapExecutionIntervalSeconds:
          type: integer
          format: uint64
          minimum: 0
    PremiumIndex:
      type: object
      description: real-time mark price, index price, and estimated funding rate per symbol
      required:
      - symbol
      - markPrice
      - indexPrice
      - lastFundingRate
      - interestRate
      - estimatedFundingRate
      - nextFundingTime
      - time
      properties:
        estimatedFundingRate:
          type: string
          format: decimal
          description: pre-computed estimated 1h funding rate (8h rate ÷ 8) from current premium index accumulator
        indexPrice:
          type: string
          format: decimal
        interestRate:
          type: string
          format: decimal
        lastFundingRate:
          type: string
          format: decimal
          description: funding rate for 8h period
        markPrice:
          type: string
          format: decimal
        nextFundingTime:
          type: integer
          format: int64
          description: unix timestamp ms of next hourly funding settlement
        symbol:
          type: string
        time:
          type: integer
          format: int64
          description: server time unix ms
    RateLimit:
      type: object
      required:
      - rateLimitType
      - interval
      - intervalNum
      - limit
      properties:
        interval:
          type: string
        intervalNum:
          type: integer
          format: int32
        limit:
          type: integer
          format: int32
        rateLimitType:
          type: string
    ApiErrorDetail:
      oneOf:
      - $ref: '#/components/schemas/JsonValidationErrorDetail'
      - type: object
      description: 'Typed details body. Variant order is important for untagged

        deserialization: keep the more-specific shape (`JsonValidation`)

        before more-permissive ones. `Upstream` holds the upstream payload

        verbatim (object, string, array, number, etc.) so pre-PR clients

        reading `details.error` (or `details` directly) keep working.'
    Filter:
      oneOf:
      - type: object
        required:
        - tickSize
        - minPrice
        - maxPrice
        - filterType
        properties:
          filterType:
            type: string
            enum:
            - PRICE_FILTER
          maxPrice:
            type: string
            format: decimal
          minPrice:
            type: string
            format: decimal
          tickSize:
            type: string
            format: decimal
      - type: object
        required:
        - stepSize
        - minQty
        - maxQty
        - filterType
        properties:
          filterType:
            type: string
            enum:
            - LOT_SIZE
          maxQty:
            type: string
            format: decimal
          minQty:
            type: string
            format: decimal
          stepSize:
            type: string
            format: decimal
      - type: object
        required:
        - limit
        - filterType
        properties:
          filterType:
            type: string
            enum:
            - MAX_NUM_ORDERS
          limit:
            type: integer
            format: uint16
            minimum: 0
      - type: object
        required:
        - limit
        - filterType
        properties:
          filterType:
            type: string
            enum:
            - MAX_NUM_ALGO_ORDERS
          limit:
            type: integer
            format: uint16
            minimum: 0
      - type: object
        required:
        - multiplierUp
        - multiplierDown
        - multiplierDecimal
        - filterType
        properties:
          filterType:
            type: string
            enum:
            - PERCENT_PRICE
          multiplierDecimal:
            type: string
          multiplierDown:
            type: string
            format: decimal
          multiplierUp:
            type: string
            format: decimal
    Asset:
      type: object
      required:
      - asset
      - marginAvailable
      - assetId
      - decimals
      - withdrawFee
      properties:
        asset:
          type: string
        assetId:
          type: integer
          format: uint16
          minimum: 0
        decimals:
          type: integer
          format: uint8
          minimum: 0
        marginAvailable:
          type: boolean
        tokenId:
          type:
          - string
          - 'null'
        userDepositLimit:
          type: string
          format: decimal
        withdrawFee:
          type: string
          format: decimal
    JsonValidationErrorDetail:
      type: object
      description: 'One JSON shape failure: machine-readable `rule` + full serde

        message including line/column. Surfaced under `details` on the wire.'
      required:
      - rule
      - message
      properties:
        message:
          type: string
          example: 'invalid type: integer `24500000`, expected a string at line 4 column 30'
        rule:
          type: string
          example: wrong_type
    InsuranceBalance:
      type: object
      required:
      - symbols
      - assets
      properties:
        assets:
          type: array
          items:
            $ref: '#/components/schemas/InsuranceAsset'
        symbols:
          type: array
          items:
            type: string
    ApiErrorResponse:
      type: object
      description: 'Structured API error response matching Bullet API format.


        All error responses from the trading API conform to this schema.'
      required:
      - status
      - message
      properties:
        details:
          oneOf:
          - type: 'null'
          - $ref: '#/components/schemas/ApiErrorDetail'
            description: Structured per-failure details. Shape depends on the variant.
        error_id:
          type:
          - string
          - 'null'
          description: Error identifier for support.
          example: 8b2e4d9f-7a1c-4f0e-9c5d-3e6a8b1c2d4f
        message:
          type: string
          description: Human-readable error message.
          example: 'Transaction validation failed: insufficient funds'
        status:
          type: integer
          format: uint16
          description: HTTP status code.
          example: 400
          minimum: 0
    OrderBook:
      type: object
      required:
      - lastUpdateId
      - E
      - T
      - bids
      - asks
      properties:
        E:
          type: integer
          format: int64
        T:
          type: integer
          format: int64
        asks:
          type: array
          items:
            type: array
            items: false
            prefixItems:
            - type: string
            - type: string
        bids:
          type: array
          items:
            type: array
            items: false
            prefixItems:
            - type: string
            - type: string
        lastUpdateId:
          type: integer
          format: uint64
          minimum: 0
    Ticker24hr:
      type: object
      required:
      - symbol
      - priceChange
      - priceChangePercent
      - weightedAvgPrice
      - lastPrice
      - openPrice
      - highPrice
      - lowPrice
      - volume
      - quoteVolume
      - openTime
      - closeTime
      - count
      properties:
        closeTime:
          type: integer
          format: int64
        count:
          type: integer
          format: int64
          minimum: 0
        highPrice:
          type: string
          format: decimal
        lastPrice:
          type: string
          format: decimal
        lowPrice:
          type: string
          format: decimal
        openPrice:
          type: string
          format: decimal
        openTime:
          type: integer
          format: int64
        priceChange:
          type: string
          format: decimal
        priceChangePercent:
          type: string
          format: decimal
        quoteVolume:
          type: string
          format: decimal
        symbol:
          type: string
        volume:
          type: string
          format: decimal
        weightedAvgPrice:
          type: string
          format: decimal