# serve-prometheus (/docs/tx/serve-prometheus)

Advertises where this neuron's prometheus metrics can be scraped, separate
from the axon endpoint used for inter-neuron traffic. Signed by the hotkey,
which must be registered on the subnet, and subject to the same serving
rate limit as `serve_axon`. Like the axon calls, this only writes chain
data — running the metrics server is up to the caller.

| Signer   | Pallet          | Wraps                              |
| -------- | --------------- | ---------------------------------- |
| `hotkey` | SubtensorModule | `SubtensorModule.serve_prometheus` |

## Parameters [#parameters]

| Parameter | Type    | Required | Description                                                                        |
| --------- | ------- | -------- | ---------------------------------------------------------------------------------- |
| `netuid`  | integer | yes      | Subnet on which to publish the endpoint.                                           |
| `ip`      | string  | yes      | Public IPv4 or IPv6 address of the endpoint, in standard dotted or colon notation. |
| `port`    | integer | yes      | TCP port the endpoint listens on.                                                  |
| `version` | integer | no       | Version number of the serving neuron's software, stored with the endpoint.         |

Address parameters (`--hotkey`, `--coldkey`, `--dest`, ...) accept a raw ss58
address, an address-book or proxy-book name, or a local wallet/hotkey name.

## CLI [#cli]

Preview with `--dry-run` (shows fee, effects, and policy result without
submitting), then submit:

```bash
btcli tx serve-prometheus \
  --netuid <int> \
  --ip <value> \
  --port <int> --dry-run
btcli tx serve-prometheus \
  --netuid <int> \
  --ip <value> \
  --port <int> -w my_coldkey
```

## Python [#python]

```python
import bittensor as sub
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = sub.ServePrometheus(netuid=1, ip="...", port=0)

async with sub.Client("finney") as client:
    plan = await client.plan(intent, wallet)   # fee, effects, policy — no submission
    result = await client.execute(intent, wallet)
    if not result.success:
        print(result.error.code, result.error.remediation)
```

Or build it by op name, as an agent would:

```python
await client.execute_tool("serve_prometheus", {...}, wallet)
```