> For the complete documentation index, see [llms.txt](https://docs.nextblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nextblock.io/api/submit-transaction.md).

# Submit Transaction

### POST /api/v2/submit

#### Description

Submits a single signed transaction to NextBlock.

### Request

* **URL: `/api/v2/submit`**
* **Method:** `POST`
* **Headers:**
  * `Content-Type: application/json`
  * `Authorization: <token>`

**Request Body**

```json
{
  "transaction": {
    "content": "base64-encoded-signed-transaction"
  },
  "skipPreFlight": true,
  "frontRunningProtection": false,
  "disableRetries": false,
  "revertOnFail": false,
  "snipeTransaction": false
}
```

### Notes

* `transaction.content` must be the base64-encoded bytes of a fully signed Solana transaction.
* The optional flags above are available on the HTTP and gRPC submission paths.
* If you use [QUIC Transaction Submission](/api/quic-transaction-submission.md), these flags are **not** available. QUIC accepts only the raw signed transaction bytes.

### **Response**

**Success (200 OK)**

```json
{
  "signature": "tx-signature",
  "uuid": "jito-bundle-uuid"
}
```

**Error (400 Bad Request)**

```json
{
  "code": 2,
  "message": "fee too low; transaction contains low tip",
  "details": []
}
```


---

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