# POST /forms/prefills/:id/values

**Resource:** [Forms](./forms.md)  
**Scopes:** `forms:write`  
**Write operation:** yes

Upsert prefill values for form fields.

## Parameters

| Name | In | Type | Required | Description |
|------|----|------|----------|-------------|
| `id` | path | uuid | yes | Prefill ID |
| `values` | body | object[] | yes | Array of { field_id, value, confidence?, reasoning? } |

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Base URL: `https://api.trustpager.com/functions/v1/api/v1` — Auth: `Authorization: Bearer YOUR_API_KEY`