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

Writes the connection info to chain storage so validators on the subnet
know where to reach this miner or validator; it does not start any server —
running the actual axon service is up to the caller. Signed by the hotkey,
which must be registered on the subnet, and subject to the chain's serving
rate limit (re-publishing too soon fails). Use `serve_axon_tls` if peers
should verify a TLS certificate, and `reset_axon` to stop advertising the
endpoint.

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

## 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.                                                      |
| `protocol` | integer | no       | Application protocol tag stored alongside the endpoint; its meaning is subnet-defined. |
| `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-axon \
  --netuid <int> \
  --ip <value> \
  --port <int> --dry-run
btcli tx serve-axon \
  --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.ServeAxon(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_axon", {...}, wallet)
```