# Blockaid Transaction Screening \[Use Blockaid data in Newton policies to screen transaction and address risk before vault manager actions execute.]

The Blockaid policy pack screens transaction or address risk before a manager action executes. Use it when a vault wants an external security signal in the same composite policy as market, compliance, or oracle checks.

## Deployment

| Field | Value |
| --- | --- |
| Pack id | `blockaid` |
| PolicyData addresses | [VaultKit address table](/developers/vaults/policy-packs#deployed-policydata-addresses) |
| Canonical deployments | [`deployments.json`](https://github.com/newt-foundation/newton-policy-packs/blob/main/deployments.json) |

### Secret

| Secret | Required? | Where to get it |
| --- | --- | --- |
| `BLOCKAID_API_KEY` | Required | [blockaid.io](https://www.blockaid.io) |

## Usage

Install the pack package, include its module in `defineComposite(...)`, upload the API key with `shield.uploadSecrets(...)`, and pass any per-call inputs the pack's `prepareQuery` requires under `prepareQueryOptions.blockaid`.