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

# Error Response

> When any error occurs, Horizon responds with a JSON document with the below attributes.

When any error occurs, Horizon responds with a JSON document with the below attributes.

**type** `URL`

The type of Status Code returned.

**title** `string`

A short title describing the Status Code, which can be used to look up more information about a error.

**status** `number`

A short title describing the Status Code, which can be used to look up more information about a error.

**detail** `string`

A short title describing the Status Code, which can be used to look up more information about a error.

**extras** `map`

If the Status Code is `Transaction Failed`, this extras field displays the Result Code returned by Stellar Core describing why the transaction failed.

**extras properties**

**envelope\_xdr** `string`

A base64-encoded representation of the TransactionEnvelope XDR whose failure triggered this response.

**result\_xdr** `string`

A base64-encoded representation of the TransactionResult XDR returned by stellar-core when submitting this transaction.

**result\_codes.transaction** `string`

The transaction Result Code returned by Stellar Core, which can be used to look up more information about an error in the docs.

**result\_codes.operations** `array`

An array of operation Result Codes returned by Stellar Core, which can be used to look up more information about an error in the docs.

```json Example theme={"theme":{"light":"github-light","dark":"github-dark"}}
{
  "type": "https://stellar.org/horizon-errors/transaction_failed",
  "title": "Transaction Failed",
  "status": 400,
  "detail": "The transaction failed when submitted to the Stellar network. The `extras.result_codes` field on this response contains further details.  Descriptions of each code can be found at: https://stellar.org/developers/learn/concepts/list-of-operations.html",
  "extras": {
    "envelope_xdr": "AAAAANPRjCD1iCti3hovsrrz6aSAjmp263grVr6+mI3SQSkcAAAAZAAPRLgAAAADAAAAAAAAAAAAAAABAAAAAQAAAACuSL9OciKkFztj4d3zuadl20HHObu+7qJenBxHPrMayQAAAAUAAAABAAAAANPRjCD1iCti3hovsrrz6aSAjmp263grVr6+mI3SQSkcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAtJBKRwAAABA1N0iqDAgqS6+3RIZGoNB9OXrY3wd/nLruXYi+eiTt4jn94fLVLwAw6jJCaK+qxStwO7c4kP6u5k0RPbuYC55CT6zGskAAABAiUGCNCS4pGlfcRmi82kbralzcFlTQAFzLyfUrYGn3RtQ4p/7TUwAqIanVoWGfEqzIJo64ZT+mYtJ72BfI+FiDg==",
    "result_codes": {
      "transaction": "tx_failed",
      "operations": ["op_no_source_account"]
    },
    "result_xdr": "AAAAAAAAAGT/////AAAAAf////4AAAAA"
  }
}
```