# NPC Voice Direction Generator

> NPC Voice Direction Generator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-03).

Generates voice-performance notes and sample spoken lines for non-player character (NPC) roles in games or interactive media.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/npc-voices?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/npc-voice-direction-generator-f4af3a9c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eRwRt6goAzSc1gKBPzYlO

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 npc-voice-direction-generator-f4af3a9c -d '<json body>'
```

Example prompt: Generate voice direction and 3 sample lines for a grizzled dwarven blacksmith NPC in a dark fantasy setting — use seed 'anvil-01' so I can reproduce the results.

## When to prefer this

Choose this endpoint when you need structured voice-acting guidance — not just dialogue lines — for NPCs in a game or interactive story. It is particularly useful when directing voice actors, setting audio production guidelines, or ensuring consistent character voice across a project. Prefer this over general text-generation tools when you need specifically formatted performance notes alongside sample lines, and over the sibling 'Dialogue opener generator' when you need deeper character voice definition rather than just opening lines.

## Known failure modes

- Invalid count value outside 1–5 range returns a validation error
- Overly vague or empty context may produce generic, low-specificity voice notes
- Conflicting theme and context inputs may produce inconsistent character voice
- Seed value that doesn't match prior inputs will produce different output despite being the same seed string

## How this service works

NPC voice direction: Create voice-performance notes and sample lines for an NPC role.

## Output

Returns voice-performance direction including character tone, accent notes, emotional delivery guidance, and sample spoken lines tailored to the NPC role, world theme, and any lore constraints provided. Multiple NPC voice packs can be returned in a single call (up to 5).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "seed": {
   "type": "string",
   "description": "Optional repeatable seed."
  },
  "count": {
   "type": "integer",
   "default": 1,
   "maximum": 5,
   "minimum": 1
  },
  "theme": {
   "type": "string",
   "description": "Optional world or project theme."
  },
  "context": {
   "type": "string",
   "description": "Optional constraints or established lore."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/npc-voice-direction-generator-f4af3a9c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)