# Citiview Agent Market – Premium Text-to-Speech (Deepgram Aura-2)

> Citiview Agent Market – Premium Text-to-Speech (Deepgram Aura-2) is a paid API for AI agents from agents.citiviewgroup.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).

Converts up to 5,000 characters of text into high-quality speech audio using Deepgram Aura-2, returning MP3 audio or base64 JSON, with 40 English voices and Spanish language support.

## Facts

- Endpoint: GET https://agents.citiviewgroup.com/v1/speak/pro?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citiview-agent-market-premium-text-to-speech-deepgram-aura-2-d40a931e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sStaQTB6NFTuJm6WAAZyQ

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 citiview-agent-market-premium-text-to-speech-deepgram-aura-2-d40a931e
```

Example prompt: Can you turn this paragraph into spoken audio using the 'athena' voice in English and give me a shareable link I can send to someone: 'Welcome to our quarterly review. Here are the highlights from this period.'

## When to prefer this

Choose this endpoint when you need high-quality neural TTS with a wide selection of English voices (40 options) or Spanish, and want the output as a ready-to-use MP3 or a shareable hosted link. It is especially well-suited for agents needing to quickly produce voice content for end users, create audio announcements, or narrate text-heavy content without managing a full TTS API integration. Prefer it over generic TTS when voice variety and Deepgram Aura-2 quality are priorities, or when a 7-day shareable audio URL is needed.

## Known failure modes

- Text exceeds 5,000 character limit — request rejected
- Invalid voice name provided — may fall back to default or return error
- Unsupported language code — only 'en' and 'es' are supported
- Invalid format value (only 'mp3' and 'json' accepted)
- Payment insufficient — x402 payment below minimum $0.005 USDC
- store link expired — 7-day share links become unavailable after expiry

## How this service works

Premium natural speech with Deepgram Aura-2: 40 English voices (luna, orion, athena, zeus...) and Spanish, returned as MP3 (or base64 JSON). $0.002 plus $0.07 per 1,000 characters, minimum $0.005. Add store=true (+$0.001) to get a 7-day share link instead of the data inline.

## Output

Returns either a raw MP3 audio file stream or a base64-encoded JSON object containing the audio data. If store=true is passed, returns a JSON object containing a 7-day shareable URL to the hosted audio file instead of the inline audio data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "text"
     ],
     "properties": {
      "text": {
       "type": "string",
       "description": "Up to 5,000 characters"
      },
      "store": {
       "type": "boolean",
       "description": "Return a 7-day share link (+$0.001)"
      },
      "voice": {
       "type": "string",
       "description": "e.g. luna, orion, athena"
      },
      "format": {
       "type": "string",
       "description": "mp3 (default) or json"
      },
      "language": {
       "type": "string",
       "description": "en (default) or es"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/citiview-agent-market-premium-text-to-speech-deepgram-aura-2-d40a931e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.citiviewgroup.com](https://www.zero.xyz/host/agents.citiviewgroup.com/llms.txt)