# QuantaFlow x402 API Gateway – rapid-youtube138

> QuantaFlow x402 API Gateway – rapid-youtube138 is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Proxies requests to a YouTube-related upstream API endpoint via the x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-youtube138?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-rapid-youtube138-bc7ab7b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sy6i4Gw6BtLgYK9nnsCdb

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-api-gateway-rapid-youtube138-bc7ab7b1 -d '<json body>'
```

Example prompt: Look up the metadata for YouTube video ID 'dQw4w9WgXcQ' — use the rapid-youtube138 gateway and hit the /video/details path with that video ID as the query parameter.

## When to prefer this

Choose this endpoint when you need YouTube data (video metadata, search results, channel info) and want to pay per-call in USDC via the x402 protocol without managing a long-term RapidAPI subscription. It is best suited for agents operating in a web3/DeFi context where micropayment billing is preferred over API key management.

## Known failure modes

- Insufficient USDC balance causes payment failure and request rejection
- Invalid or unsupported path results in upstream 404 or error passthrough
- Malformed query object causes upstream API to return an error
- Upstream RapidAPI YouTube service downtime results in 502/503 passthrough
- Rate limits on the upstream RapidAPI key cause 429 errors to be forwarded

## How this service works

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

## Output

The raw upstream YouTube API response body (JSON) is passed through directly, along with the content type header, after the $0.01 USDC x402 payment is settled. The agent receives whatever the underlying RapidAPI YouTube endpoint returns for the given path and query.

## 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-api-gateway-rapid-youtube138-bc7ab7b1/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)