# set-crowdloan-max-contribution (/docs/tx/set-crowdloan-max-contribution)

Caps how much any single contributor can put in, useful to keep a raise
broadly distributed. Omitting the amount clears the limit. Only the
creator may change it, and only while the loan has not been finalized.

| Signer    | Pallet    | Wraps                            |
| --------- | --------- | -------------------------------- |
| `coldkey` | Crowdloan | `Crowdloan.set_max_contribution` |

## Parameters [#parameters]

| Parameter                  | Type              | Required | Description                                                               |
| -------------------------- | ----------------- | -------- | ------------------------------------------------------------------------- |
| `crowdloan_id`             | integer           | yes      | Identifier of the crowdloan, assigned when it was created.                |
| `new_max_contribution_tao` | number \| `"all"` | no       | Largest total any single contributor may put in. Omit to clear the limit. |

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 set-crowdloan-max-contribution \
  --crowdloan-id <int> --dry-run
btcli tx set-crowdloan-max-contribution \
  --crowdloan-id <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.SetCrowdloanMaxContribution(crowdloan_id=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("set_crowdloan_max_contribution", {...}, wallet)
```