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

# Wallet Broadcast Tx

> Broadcast a signed Polygon transaction (approval + redemption relay).

Accepts signed approval or redemption transactions targeting known
Polymarket contracts, and broadcasts via our reliable Alchemy RPC.
Rejects arbitrary transactions for safety.

The transaction is signed client-side (self-custody preserved).
We only relay it through our RPC for reliability.



## OpenAPI

````yaml /openapi.json post /api/sdk/wallet/broadcast-tx
openapi: 3.1.0
info:
  title: Simmer API
  description: Agent-native trading infrastructure for prediction markets.
  version: 1.0.0
servers:
  - url: https://api.simmer.markets
security: []
paths:
  /api/sdk/wallet/broadcast-tx:
    post:
      tags:
        - sdk-wallet
      summary: Wallet Broadcast Tx
      description: |-
        Broadcast a signed Polygon transaction (approval + redemption relay).

        Accepts signed approval or redemption transactions targeting known
        Polymarket contracts, and broadcasts via our reliable Alchemy RPC.
        Rejects arbitrary transactions for safety.

        The transaction is signed client-side (self-custody preserved).
        We only relay it through our RPC for reliability.
      operationId: api_wallet_broadcast_tx_api_sdk_wallet_broadcast_tx_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BroadcastTxRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BroadcastTxResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    BroadcastTxRequest:
      properties:
        signed_tx:
          type: string
          minLength: 10
          title: Signed Tx
          description: Hex-encoded signed transaction (0x-prefixed)
      type: object
      required:
        - signed_tx
      title: BroadcastTxRequest
      description: Request to broadcast a signed Polygon transaction (approval relay).
    BroadcastTxResponse:
      properties:
        success:
          type: boolean
          title: Success
        tx_hash:
          anyOf:
            - type: string
            - type: 'null'
          title: Tx Hash
        status:
          anyOf:
            - type: string
            - type: 'null'
          title: Status
        error:
          anyOf:
            - type: string
            - type: 'null'
          title: Error
      type: object
      required:
        - success
      title: BroadcastTxResponse
      description: Response from broadcasting a signed transaction.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError

````