# Diamond Bitcoin Address Watch

> Diamond Bitcoin Address Watch is a paid API for AI agents from diamond.btc-intel.workers.dev, paid per call via x402, $1/call, status unknown (last checked 2026-10-20).

Registers a Bitcoin address for ongoing monitoring and returns an RSS/notification feed URL to receive alerts about that address

## Facts

- Endpoint: GET https://diamond.btc-intel.workers.dev/api/x402/watch?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/diamond-bitcoin-address-watch-c9fa880e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SRxG3cI90h01M01eYPHAr

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 diamond-bitcoin-address-watch-c9fa880e
```

Example prompt: Set up a watch alert for the Bitcoin address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh so I get an RSS feed and notifications whenever there's any activity on it.

## When to prefer this

Use this endpoint when you need ongoing, persistent monitoring of a specific Bitcoin address with feed-based alerting (RSS or push notifications via ntfy), rather than a one-time synchronous risk check. Ideal for compliance workflows, investigative tracking, or exchange deposit monitoring where you need to be notified asynchronously about future activity.

## Known failure modes

- Invalid or malformed Bitcoin address format returns an error
- Payment not completed (x402 flow failure) results in no resource creation
- Invalid or non-existent feed_id when trying to extend an existing watch
- Network or worker timeout during resource creation
- Address already watched at maximum capacity for the feed

## How this service works

Bitcoin address risk checks (sanctions, ransomware, laundering patterns), address watch alerts, a live market pulse and a daily whale report. Pay per call with Lightning or USDC - no account.

## Output

Returns a JSON object containing the monitored Bitcoin address, the watch expiry timestamp (typically ~1 year), a feed URL for viewing alerts in a browser, an RSS URL for programmatic/feed-reader consumption, and an ntfy topic string for push notification delivery.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "feed": {
       "type": "string",
       "description": "Optional: an existing Address Watch feed id to add to or extend"
      },
      "address": {
       "type": "string",
       "description": "Bitcoin mainnet address (bc1..., 1... or 3...)"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "until": "2026-11-15T00:00:00Z",
  "address": "bc1q...",
  "rss_url": "https://<host>/w/<feed id>.rss",
  "feed_url": "https://<host>/w/<feed id>",
  "ntfy_topic": "dw..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/diamond-bitcoin-address-watch-c9fa880e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from diamond.btc-intel.workers.dev](https://www.zero.xyz/host/diamond.btc-intel.workers.dev/llms.txt)