# BlockchainSecurity Address Labels Lookup

> BlockchainSecurity Address Labels Lookup is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Retrieves risk labels and classification data for a blockchain address on a specified chain via the BlockchainSecurity Atlantis upstream service.

## Facts

- Endpoint: GET https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/bcs/labels
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchainsecurity-address-labels-lookup-951167d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aOq6mP6ceE-e1bE7QYsx-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability blockchainsecurity-address-labels-lookup-951167d7
```

Example prompt: Can you look up the BlockchainSecurity risk labels for Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — use the MistTrack source and get fresh data?

## When to prefer this

Use this endpoint when you need to retrieve structured risk labels and classifications for a specific blockchain address from the BlockchainSecurity Atlantis data source. Prefer this over generic blockchain explorers when you need curated risk/compliance labels (e.g. from MistTrack) rather than raw on-chain transaction data. Ideal for compliance screening, agent payment guard workflows, or due diligence on counterparty addresses before executing transactions.

## Known failure modes

- Invalid or malformed address format returns a validation error
- Unsupported chain slug returns an error or empty result
- Upstream BlockchainSecurity service unavailable causes a proxy failure
- Rate limiting or credit exhaustion from the upstream provider
- Invalid sources selector returns no data or an error
- Address has no labels in the database returns an empty data object

## How this service works

Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.

## Output

Returns a JSON object containing the product identifier ('bcs-address-labels'), upstream service name ('blockchainsecurity-atlantis'), upstream response with a data object containing the address labels and classifications, metadata including a request ID, and upstream headers with credit usage information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "pattern": "^[a-z0-9_-]{2,32}$",
       "description": "BlockchainSecurity chain slug, such as ethereum, bsc, or tron."
      },
      "address": {
       "type": "string",
       "pattern": "^[A-Za-z0-9:_-]{3,128}$",
       "description": "Address to label on the selected chain."
      },
      "refresh": {
       "type": "string",
       "pattern": "^(?:true|false)$",
       "description": "Optional true to bypass upstream cache when supported."
      },
      "sources": {
       "type": "string",
       "pattern": "^[A-Za-z0-9,_-]{1,80}$",
       "description": "Optional BlockchainSecurity sources selector, such as misttrack or all."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "product",
      "upstream_service",
      "upstream_response"
     ],
     "properties": {
      "product": {
       "type": "string"
      },
      "request": {
       "type": "object"
      },
      "provenance": {
       "type": "object"
      },
      "upstream_headers": {
       "type": "object"
      },
      "upstream_service": {
       "type": "string"
      },
      "upstream_response": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "product": "bcs-address-labels",
  "upstream_headers": {
   "request_id": "example-request-id",
   "credit_cost": null,
   "credit_remaining": null
  },
  "upstream_service": "blockchainsecurity-atlantis",
  "upstream_response": {
   "data": {},
   "meta": {
    "request_id": "example-request-id"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchainsecurity-address-labels-lookup-951167d7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-agent-preflight.bytoken2023.workers.dev](https://www.zero.xyz/host/base-agent-preflight.bytoken2023.workers.dev/llms.txt)