> ## Documentation Index
> Fetch the complete documentation index at: https://dexbuilder.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 调整持仓保证金

> 增加或减少指定持仓保证金

增加或减少指定持仓保证金。


## OpenAPI

````yaml openapi/perpdex.yaml POST /dex_futures/{settle}/positions/{contract}/margin
openapi: 3.0.3
info:
  title: DexBuilder PerpDEX API
  version: 1.0.0
  description: DexBuilder PerpDEX REST API。
servers:
  - url: https://api.dexbuilder.com/api/v1
    description: DexBuilder PerpDEX REST API
security:
  - DexBuilderKey: []
    DexBuilderTimestamp: []
    DexBuilderSignature: []
tags:
  - name: 行情
    description: 永续合约公开行情与市场数据
  - name: 风险数据
    description: 风险限额与市场强平数据
  - name: 账户
    description: 账户与费率
  - name: 持仓
    description: 持仓查询与管理
  - name: 订单
    description: 订单、成交与批量交易
paths:
  /dex_futures/{settle}/positions/{contract}/margin:
    post:
      tags:
        - 持仓
      summary: 调整持仓保证金
      description: 增加或减少指定持仓保证金。
      operationId: updatePerpPositionMargin
      parameters:
        - $ref: '#/components/parameters/Settle'
        - $ref: '#/components/parameters/ContractPath'
        - name: change
          in: query
          required: true
          description: 保证金调整数量；正数增加，负数减少
          schema:
            type: string
      responses:
        '200':
          description: 调整成功
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Position'
components:
  parameters:
    Settle:
      name: settle
      in: path
      required: true
      description: 结算币种
      schema:
        type: string
        enum:
          - usdt
      example: usdt
    ContractPath:
      name: contract
      in: path
      required: true
      description: 永续合约
      schema:
        type: string
      example: BTC_USDT
  schemas:
    Position:
      type: object
      description: 永续合约持仓
      properties:
        user:
          type: integer
          format: int64
          description: 用户 ID
        contract:
          type: string
          description: 合约
        size:
          type: string
          description: 持仓数量
        leverage:
          type: string
          description: 逐仓杠杆；0 表示全仓
        risk_limit:
          type: string
          description: 风险限额
        leverage_max:
          type: string
          description: 最大杠杆
        maintenance_rate:
          type: string
          description: 维持保证金率
        value:
          type: string
          description: 持仓价值
        margin:
          type: string
          description: 保证金
        entry_price:
          type: string
          description: 开仓均价
        liq_price:
          type: string
          description: 预估强平价
        mark_price:
          type: string
          description: 标记价格
        unrealised_pnl:
          type: string
          description: 未实现盈亏
        realised_pnl:
          type: string
          description: 已实现盈亏
        mode:
          type: string
          description: 持仓模式
        cross_leverage_limit:
          type: string
          description: 全仓杠杆
        pid:
          type: integer
          format: int64
          description: Position ID
      additionalProperties: true
  securitySchemes:
    DexBuilderKey:
      type: apiKey
      in: header
      name: KEY
      description: DexBuilder API Key
    DexBuilderTimestamp:
      type: apiKey
      in: header
      name: Timestamp
      description: Unix 时间戳（秒），与当前时间差不得超过 60 秒
    DexBuilderSignature:
      type: apiKey
      in: header
      name: SIGN
      description: 使用 API Secret 对签名字符串执行 HMAC-SHA512 后的十六进制签名

````

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