# Vault Check

This endpoint allows the caller to specify a Solana address and return whether or not that address is a valid Squads V3 or V4 vault account, and can receive funds.

**Endpoint:**

```
https://4fnetmviidiqkjzenwxe66vgoa0soerr.lambda-url.us-east-1.on.aws/isSquad/<ADDRESS>
```

**Example Request:**

```
https://4fnetmviidiqkjzenwxe66vgoa0soerr.lambda-url.us-east-1.on.aws/isSquad/HFwi9HgNtFcMwNJPHa1czrPhuxeZFZ7G9tPQ1LqAd7sy
```

**Example Response:**

```json
{
  “isSquad”: true,
  “version”: "v4“
}
```

`isSquad` denotes whether the given address is a valid Squads vault or not. True means it is a valid V3 or V4 vault account.

`version` denotes which Squads program version the vault is from, if it is a valid vault. This will return V3, V4, or an empty string if `isSquad` is false.

### Important Notes:

* This endpoint does not check for ATA (associated token account) validity. **IF SENDING SPL TOKENS, YOU MUST CHECK THIS SEPARATELY.**
* There is a rate limit of 25 RPS.
* Do not expose the endpoint URL on your frontend. Either use SSR, or proxy the endpoint through a server you control.
* If possible, cache responses to your own infrastructure to avoid polling the endpoint for the same addresses again and again.

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# 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.squads.so/main/development/api/vault-check.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.