> For the complete documentation index, see [llms.txt](https://relationlabs.gitbook.io/relation-graph/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://relationlabs.gitbook.io/relation-graph/api/mutual-contract-interaction.md).

# Mutual Contract Interaction

## <mark style="color:blue;">GET</mark> /api/v1/mutualContractInteraction

* Through this API, you can verify or query the list of smart contract addresses that have been mutually interacted with between two or more accounts or addresses.
* Header

| Field  | Type   | Required | Remarks                                                                                      |
| ------ | ------ | -------- | -------------------------------------------------------------------------------------------- |
| ApiKey | String | true     | [ApiKey](/relation-graph/api/mutual-contract-interaction.md) obtained from the administrator |

* Request Parameters

| Field   | Type | Required | Remarks     |
| ------- | ---- | -------- | ----------- |
| address | List | true     | EOA Address |

* Request Example

```shell
curl  GET 'https://api.relationlabs.ai/api/v1/mutualContractInteraction?address=0x9bd286ef4e3d9ec1af6c6ae9da2f0b3617deab13,0x1ac286ef4e3d9ec1af6c6ae9da2f0b3617deab22' \
--header 'ApiKey: <ApiKey>'
```

* Response Parameters

| Field | Type   | Remarks        |
| ----- | ------ | -------------- |
| code  | String | Return code    |
| desc  | String | Return message |
| data  | List   | Data           |

* Response Body

```json
{
  "code": "0",
  "desc": "success",
  "data": [
    "0x1111",
    "0x2222",
    "0x3333"
  ]
}
```

* Return Code

| code | desc    | Remarks                           |
| ---- | ------- | --------------------------------- |
| 0    | success | the flag for a successful request |