---
title: "Returns a Canonical Transaction Chain transaction by index"
method: GET
path: "/transaction/index/{index}"
---

# Returns a Canonical Transaction Chain transaction by index

`GET /transaction/index/{index}`

## Request

- The document declares no server URL.
- Auth: none declared
- TypeScript: <https://skmtc.dev/bobanetwork/apis/ethereum-optimism-data-transport-later/docs/transaction/index/:index/get.ts> (a function with typed inputs; its response is checked against the schema)

This returns a transaction that has been appended to the Canonical Transaction
Chain via a `sequencerBatchAppend()` or `queueBatchAppend()` by index

## Path parameters

- `index` integer, required

## Response `200`

An object representing a Transaction by index

- TransactionResponse
  - `batch` BatchEntry
    - `index` number
    - `blockNumber` number
    - `timestamp` number
    - `submitter` string
    - `size` number
    - `root` string
    - `prevTotalElements` number
    - `extraData` string
    - `l1TransactionHash` string
  - `transaction` TransactionEntry
    - `index` number
    - `batchIndex` number
    - `data` string
    - `blockNumber` number
    - `timestamp` number
    - `gasLimit` number
    - `target` string
    - `origin` string
    - `queueOrigin` string
    - `queueIndex` number
    - `decoded` DecodedSequencerBatchTransaction
      - `sig` ECDSASignature
        - `r` string
        - `s` string
        - `v` number
      - `gasLimit` number
      - `gasPrice` number
      - `nonce` number
      - `target` string
      - `data` string

## Changes

- **2026-07-17** `ec0cd0f61e01`: 2 breaking, 1 info
  - added the new path request parameter `index`
  - the `transaction/queueIndex` response's property type changed from no type to `number` for status `200`
  - added the optional property `transaction/decoded` to the response with the `200` status

[Operation history](https://skmtc.dev/bobanetwork/apis/ethereum-optimism-data-transport-later/changes/transaction/index/:index/get.md)

---

[API](https://skmtc.dev/bobanetwork/apis/ethereum-optimism-data-transport-later.md) - [All operations](https://skmtc.dev/bobanetwork/apis/ethereum-optimism-data-transport-later/llms.txt) - [OpenAPI document](https://skmtc.dev/bobanetwork/apis/ethereum-optimism-data-transport-later/revisions/ec0cd0f61e01?raw)