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

# Prepare Transaction

> Prepare an arbitrary transaction for a smart account

### Key Concepts

* **Transaction Signing**: Only authorized signers can create transactions
* **Destination**: Tokens will be sent to the specified destination address

### Important Notes

* The transaction must be valid and signed by the authorized signers


## OpenAPI

````yaml POST /api/v1/smart-accounts/{smart_account_address}/transactions
openapi: 3.0.0
info:
  title: Squads API
  version: 1.0.0
  description: >
    The Squads API provides functionality for managing smart accounts and
    spending limits.

    This API allows you to create and manage smart accounts, set up spending
    limits, and perform transactions.
servers:
  - url: https://developer-api.squads.so
    description: Production server
security:
  - bearerAuth: []
paths:
  /api/v1/smart-accounts/{smart_account_address}/transactions:
    post:
      summary: Prepare an arbitrary transaction for a smart account
      description: >
        Prepare an arbitrary transaction that will be executed by a smart
        account.

        This endpoint allows users to submit custom transactions to be processed
        through their smart account.
      operationId: prepareArbitraryTransaction
      parameters:
        - $ref: '#/components/parameters/NetworkHeader'
        - $ref: '#/components/parameters/SmartAccountAddress'
        - $ref: '#/components/parameters/Debug'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - transaction
              properties:
                transaction:
                  type: string
                  description: The serialized transaction to be processed
                transaction_signers:
                  type: array
                  items:
                    type: string
                  description: List of signers for this transaction
                fee_config:
                  $ref: '#/components/schemas/FeeConfig'
      responses:
        '200':
          description: Transaction prepared successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  transaction:
                    type: string
                    description: The prepared transaction ready for execution
                  fee:
                    $ref: '#/components/schemas/Fee'
                  simulation_logs:
                    type: array
                    items:
                      type: string
                    description: >-
                      Transaction simulation logs. Returns an empty array when
                      debug=false or not provided.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/UnprocessableEntity'
components:
  parameters:
    NetworkHeader:
      name: x-squads-network
      in: header
      required: true
      schema:
        type: string
        enum:
          - mainnet
          - devnet
      description: Specifies the network for the API request
    SmartAccountAddress:
      name: smart_account_address
      in: path
      required: true
      schema:
        type: string
      description: The address of the smart account
    Debug:
      name: debug
      in: query
      required: false
      schema:
        type: boolean
      description: When true, includes transaction simulation logs in the response
  schemas:
    FeeConfig:
      type: object
      properties:
        currency:
          type: string
          description: Currency for the fee
        payer_address:
          type: string
          description: Address of the fee payer
        self_managed_fees:
          type: boolean
          default: false
          description: >-
            When true, the fee is paid by the smart account itself. When false
            or not set, the fee is paid by the transaction signers.
    Fee:
      type: object
      properties:
        amount:
          type: string
          format: uint64
          description: Fee amount in base units
        amount_decimal:
          type: string
          description: Decimal representation of the fee amount
        currency:
          type: string
          description: Currency of the fee
        sol_equivalent:
          $ref: '#/components/schemas/SolEquivalent'
    SolEquivalent:
      type: object
      properties:
        amount:
          type: string
          format: uint64
          description: Amount in base units
        amount_decimal:
          type: string
          description: Decimal representation of the amount
    Error:
      type: object
      properties:
        status:
          type: integer
          description: HTTP status code
        code:
          type: string
          description: Error code for easy lookup
        message:
          type: string
          description: Detailed error description
        details:
          type: array
          items:
            $ref: '#/components/schemas/ErrorDetail'
        metadata:
          $ref: '#/components/schemas/ErrorMetadata'
        custom:
          type: object
          additionalProperties:
            type: string
        simulation_logs:
          type: array
          items:
            type: string
          description: >-
            Transaction simulation logs. Returns an empty array when debug=false
            or not provided.
    ErrorDetail:
      type: object
      properties:
        field:
          type: string
          description: The field that failed validation
        code:
          type: string
          description: Error code specific to this validation failure
        message:
          type: string
          description: Detailed message about the validation failure
        expected:
          type: string
          description: Expected value or condition
        actual:
          type: string
          description: Actual value received
    ErrorMetadata:
      type: object
      properties:
        status:
          type: integer
          description: HTTP status code
        request_id:
          type: string
          description: Unique identifier for debugging
        timestamp:
          type: string
          format: date-time
          description: When the error occurred
        resource_id:
          type: string
          description: Identifier of the resource that experienced the error
        useful_links:
          type: array
          items:
            type: string
          description: Links to relevant documentation
  responses:
    BadRequest:
      description: Bad Request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    UnprocessableEntity:
      description: Unprocessable Entity
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: UUID
      description: UUID-based API key provided by Squads

````