---
title: "Broadcast signed Ada transaction"
method: POST
path: "/v3/ada/broadcast"
tags: ["Cardano - Tatum API"]
---

# Broadcast signed Ada transaction

`POST /v3/ada/broadcast`

/v3/ada/broadcast

**You can work with Cardano by [connecting directly to a blockchain node provided by Tatum](https://apidoc.tatum.io/tag/Node-RPC#operation/NodeJsonPostRpcDriver).**

  

#### 2 credits per API call.

Broadcasts a signed transaction to the Ada blockchain. This method is used internally from Tatum KMS or Tatum Client Libraries. It is possible to create a custom signing mechanism and only use this method for broadcasting data to the blockchain.

## Request body

- BroadcastKMS
  - `txData` string, required — Raw signed transaction to be published to network.
  - `signatureId` string, uuid — ID of prepared payment template to sign. Required only, when broadcasting transaction signed by Tatum KMS.
  - `index` number — (Only if the signature ID is mnemonic-based and you run KMS v6.2 or later) The index of the address to send the assets from that was generated from the mnemonic

## Response `200`

OK

- TransactionHash
  - `txId` string, required — The hash (ID) of the transaction

## Other responses

- `400` — Bad Request
- `401` — Unauthorized. Not valid or inactive subscription key present in the HTTP Header.
- `403` — Forbidden. The request is authenticated, but it is not possible to perform the required operation due to a logical error or invalid permissions.
- `500` — Internal server error. There was an error on the server during the processing of the request.

---

[API](https://skmtc.net/tatum/apis/blockchain-data.md) · [All operations](https://skmtc.net/tatum/apis/blockchain-data/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/tatum/blockchain-data/revisions/8622ee4b8fae/schema)