# Project Builder

### RPC Endpoint

{% hint style="info" %}
The project builders could send bundle to the [Endpoint Exclusive for Project](/transaction-submission/rpc/ethereum/integration.md)
{% endhint %}

<https://eth.blockrazor.xyz>

### Request parameters

<table><thead><tr><th width="183">Parameters</th><th width="118">Mandatory</th><th width="98">Format</th><th width="132">Example</th><th>Remark</th></tr></thead><tbody><tr><td>txs</td><td>mandatory</td><td>[]bytes</td><td>[ "0xf84a……e54284" ]</td><td>raw txs, up to 50 transactions allowed to be set</td></tr><tr><td>revertingTxHashes</td><td>optional</td><td>[]hash</td><td>["0x1f23……0abb1e"]</td><td>Transactions that allow to be reverted, a subset of txs</td></tr><tr><td>blockNumber</td><td>optional</td><td>uint64</td><td>"0x3C04F81"</td><td>The maximum block number for the bundle to be valid, with the default set to the current block number + 100</td></tr></tbody></table>

### Request Example

```json
curl -X POST -H "Content-Type: application/json" --data '{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_sendBundle",
  "params": [{
    "Txs": [
"0xf8668203988405f5e100825208942ee393c739036a7660ec11bf2101d537eb52f3ac80808193a06836d5f4052376dc3114794da5fedd7a5b8090ddae0ec45dfa66c234fcabb6efa07cf17dad992c33e8e3e4d82355cfe12d3be2560fc2b0873c36dce398088d8e4f"
    ]
    "revertingTxHashes":[],
    "blockNumber":"0x3C04F81"
  }]
}' https://eth.blockrazor.xyz
```

### Response Example

normal

```json
{"jsonrpc":"2.0","id":1,"result": "0x11111111..."}
```

abnormal

```json
{"jsonrpc":"2.0","id":1,"jsonerror":{"code":-38000,"message":"nonce too low: address 0x9Abae1b279A4Be25AEaE49a33e807cDd3cCFFa0C, tx: 0 state: 45"}}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.blockrazor.io/transaction-submission/bundle/ethereum/project-builder.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.