# GW8 Crypto Regime + WaveTrend Alert Subscription API

> GW8 Crypto Regime + WaveTrend Alert Subscription API is a paid API for AI agents from micro-saas-agent.onrender.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-22).

Subscribe to a webhook that delivers WaveTrend band-dot alert notifications for specified crypto pairs, filtered by signal type (outer, inner, or all)

## Facts

- Endpoint: POST https://micro-saas-agent.onrender.com/api/alerts/subscribe?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gw8-crypto-regime-wavetrend-alert-subscription-api-23ab896c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nqjdItX1cOVMKPicSdCCM

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 gw8-crypto-regime-wavetrend-alert-subscription-api-23ab896c -d '<json body>'
```

Example prompt: Subscribe me to outer-band WaveTrend alert notifications for BTC and ETH, and send them to my webhook at https://myserver.com/crypto-hook.

## When to prefer this

Choose this endpoint when you need asynchronous, push-based delivery of WaveTrend band-dot events for one or more crypto pairs, rather than polling for current signal state. It is ideal for event-driven architectures where your agent or server needs to react immediately when a signal fires, without repeatedly calling a data endpoint. Prefer it over the point-in-time WaveTrend data endpoint when you want sustained monitoring over time rather than a single snapshot.

## Known failure modes

- Invalid or unreachable webhookUrl returns an error and no subscription is created
- Unsupported pair symbols result in rejection or empty alert stream
- Invalid filter enum value causes a validation error
- Payment failure via x402 means no charge and no subscription created
- Expired or exhausted subscription (alertsLeft = 0) stops delivering alerts
- Webhook endpoint going offline causes silent alert loss after subscription is created

## How this service works

Pay-per-call tools for AI agents via x402 (USDC on Base): should-I-pay decisions (spend policy + seller reputation in one call), spend-policy risk checks, x402 seller reputation verdicts, token safety verdicts, payment-rail cost checks, and crypto market data (regime, WaveTrend band dots, relative strength, flows, simulated hit-rate backtests). Agent guide: /agents.md. No charge on failure (settle only after data is ready), signed receipts, safe retries. Signal only, no trading, not financial advice.

## Output

Returns a one-time webhook secret (shown only at subscribe time), the active filter setting, subscription ID, expiry timestamp, and the number of alerts remaining in the subscription quota.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "pairs": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "example": [
    "BTC",
    "ETH"
   ]
  },
  "filter": {
   "enum": [
    "outer",
    "inner",
    "all"
   ],
   "type": "string",
   "example": "outer"
  },
  "webhookUrl": {
   "type": "string",
   "example": "https://example.com/hook"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "one-time webhook secret returned once at subscribe",
  "filter": "outer",
  "expiresAt": "2026-11-17T00:00:00Z",
  "alertsLeft": 300,
  "subscriptionId": "sub_…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gw8-crypto-regime-wavetrend-alert-subscription-api-23ab896c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from micro-saas-agent.onrender.com](https://www.zero.xyz/host/micro-saas-agent.onrender.com/llms.txt)