# Call a Smart Contract Function

<mark style="color:green;">`POST`</mark> `Circular_CallContract_`

**Headers**

| Name         | Value              |
| ------------ | ------------------ |
| Content-Type | `application/json` |

**Body**

| Name         | Type   | Description                                                                                                              |
| ------------ | ------ | ------------------------------------------------------------------------------------------------------------------------ |
| `Blockchain` | string | Blockchain address excluding the "0x" hexadecimal identifier                                                             |
| `From`       | string | User's wallet address excluding the "0x" hexadecimal identifier                                                          |
| `Timestamp`  | string | Timestamp written in "YYYY:MM:DD-HH:mm:ss" format                                                                        |
| `Request`    | string | Requested function in Hex format (include the parenthesis and the semicolumn e.g. CRC\_Contract.\_\_GetContractName();). |

**Result**

{% tabs %}
{% tab title="200" %}

```json
{
    "Result": 200,
    "Response": "7b20225f506572666f726d616e636522203a2022487970657220436f646520457865637574696f6e2054696d653a20313130307573222c200a0a225f436f6e736f6c655f4f757470757422203a202235343635373337343230373336643631373237343230363336663665373437323631363337343061227d",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}
```

Remember to convert the response from Hex to String if you want to get the result in plain text.
{% endtab %}

{% tab title="117" %}
Wrong function call. Remember to pass the request in Hex format as shown in the body section or to verify that the smart contract address is the right one.

```json
{
    "Result": 117,
    "Response": "4552524f523a57726f6e672046756e6374696f6e2043616c6c3a200a",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}
```

{% endtab %}
{% endtabs %}


---

# 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://circular-protocol.gitbook.io/standard-apis/api-docs/apis/call-a-smart-contract-function.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.