# BlockchainSecurity BCS Assets Lookup via x402 Payment Firewall

> BlockchainSecurity BCS Assets Lookup via x402 Payment Firewall is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Retrieves blockchain asset data for a specified chain from the BlockchainSecurity Atlantis upstream service, accessed through an x402-gated payment proxy.

## Facts

- Endpoint: GET https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/bcs/assets
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchainsecurity-bcs-assets-lookup-via-x402-payment-firewall-92a19212
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f4_CKlIpBQWTmrBmoCBKa

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-bcs-assets-lookup-via-x402-payment-firewall-92a19212
```

Example prompt: Can you fetch the list of blockchain assets for the 'base' chain from the BlockchainSecurity Atlantis service?

## When to prefer this

Use this endpoint when you need blockchain asset data specifically from the BlockchainSecurity Atlantis provider, accessed via a micro-payment x402 proxy. Prefer this over direct blockchain RPC calls when you need a curated, structured asset registry for a given chain, especially in agentic workflows where x402 payment rails are already in use.

## Known failure modes

- Missing or invalid 'chain' query parameter returns validation error
- Payment not provided or insufficient USDC causes 402 Payment Required response
- Upstream BlockchainSecurity Atlantis service unavailable causes proxy error
- Invalid chain slug format (not matching ^[a-z0-9_-]{2,32}$) causes schema validation failure
- Unknown chain slug returns empty or error upstream response

## 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

A JSON object containing a 'bcs-assets' product field, upstream service identifier ('blockchainsecurity-atlantis'), upstream response with asset data and metadata (including request_id), and upstream response headers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "pattern": "^[a-z0-9_-]{2,32}$",
       "description": "BlockchainSecurity chain slug."
      }
     }
    }
   },
   "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-assets",
  "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-bcs-assets-lookup-via-x402-payment-firewall-92a19212/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)