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

# Zap-Out — Submit and land zap-out transactions

> Submit signed zap-out (decrease position) transactions via Jito bundles for on-chain execution. Provides better landing rate than direct RPC submission.



## OpenAPI

````yaml /api-reference/openapi.json post /position/landing-decrease-tx
openapi: 3.0.0
info:
  title: LP Agent Open API
  version: 1.0.0
  description: |+
    Public API for LP Agent

    **Authentication**

    All endpoints require an API key passed via the `x-api-key` header.

servers:
  - url: https://api.lpagent.io/open-api/v1
    description: Production
security:
  - apiKeyAuth: []
tags: []
paths:
  /position/landing-decrease-tx:
    post:
      tags:
        - Position
      summary: Zap-Out — Submit and land zap-out transactions
      description: >-
        Submit signed zap-out (decrease position) transactions via Jito bundles
        for on-chain execution. Provides better landing rate than direct RPC
        submission.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - lastValidBlockHeight
                - closeTxsWithJito
              properties:
                lastValidBlockHeight:
                  type: integer
                  description: Last valid block height for the transactions
                closeTxs:
                  type: array
                  items:
                    type: string
                  description: Close position transactions (base64)
                  default: []
                swapTxs:
                  type: array
                  items:
                    type: string
                  description: Swap transactions (base64)
                  default: []
                closeTxsWithJito:
                  type: array
                  items:
                    type: string
                  description: Close position transactions with Jito tips (base64)
                swapTxsWithJito:
                  type: array
                  items:
                    type: string
                  description: Swap transactions with Jito tips (base64)
                  default: []
      responses:
        '200':
          description: Successfully submitted and landed transactions
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    example: success
                  data:
                    type: object
                    properties:
                      method:
                        type: string
                        enum:
                          - JITO
                      signature:
                        type: string
        '400':
          description: Invalid parameters or transaction execution failed
        '500':
          description: Internal server error
components:
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API key for authentication

````