# QuantaFlow x402 Deepgram API Gateway

> QuantaFlow x402 Deepgram API Gateway is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Proxies requests to Deepgram's speech-to-text and audio intelligence API via the x402 micropayment protocol at $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/deepgram?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-deepgram-api-gateway-1befddc0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R-IB6OptwfbXS8_VvhRU7

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 quantaflow-x402-deepgram-api-gateway-1befddc0 -d '<json body>'
```

Example prompt: Transcribe this audio file for me — use the Deepgram gateway at the /v1/listen path and send the audio URL as the JSON body so I can get the full transcript back.

## When to prefer this

Choose this endpoint when you need pay-per-use access to Deepgram's speech-to-text API using USDC micropayments via the x402 protocol, without managing a Deepgram subscription or API key. Ideal for AI agents operating in web3/DeFi contexts that already handle x402 payments, or for low-volume transcription tasks where per-call billing at $0.01 USDC is preferable to a monthly subscription.

## Known failure modes

- Insufficient USDC balance or failed x402 payment results in 402 Payment Required response
- Invalid or inaccessible audio URL causes Deepgram upstream error
- Malformed JSON body forwarded to Deepgram returns 400 Bad Request from upstream
- Incorrect path parameter results in Deepgram 404 or unrecognized route
- Network timeout from upstream Deepgram service
- Unsupported audio format rejected by Deepgram

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

The raw upstream Deepgram API response body is passed through after successful x402 payment verification — typically a JSON object containing transcription text, word-level timestamps, confidence scores, speaker labels, and metadata depending on the Deepgram endpoint and parameters used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-x402-deepgram-api-gateway-1befddc0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)