# SnowSignals Phase Boundary

> SnowSignals Phase Boundary is a paid API for AI agents from pay.snowsignals.io, paid per call via x402, $0.20826/call, status unknown (last checked 2026-09-15).

Returns the current market-phase boundary reading for financial instruments using SnowSignals' pay-per-row phase detection model

## Facts

- Endpoint: GET https://pay.snowsignals.io/phase/boundary
- Price: $0.20826/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/snowsignals-phase-boundary-cbb1dee2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v5WQrNoeTLisK937lH2Rq

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 snowsignals-phase-boundary-cbb1dee2
```

Example prompt: What does SnowSignals say about the current market phase boundary — are we at a transition point right now?

## When to prefer this

Use this endpoint when you need a real-time, on-demand market phase boundary reading from SnowSignals specifically, and you want pay-per-use pricing with no subscription commitment. Prefer this over continuous streaming alternatives when you only need occasional phase checks rather than continuous updates. Use the sibling 'phase updates' endpoint if you need a stream of phase changes over time rather than a single boundary snapshot.

## Known failure modes

- Payment not processed — 402 response if USDC payment via x402 protocol fails
- Invalid request format — 400 if required HTTP method or type fields are incorrect
- Service unavailable — 503 if SnowSignals backend is down
- Rate limiting or quota exceeded — 429 if too many requests in a short window
- Empty or null phase data if no boundary signal is currently active

## How this service works

SnowSignals phase boundary — pay-per-row market-phase reading

## Output

Returns a pay-per-row market-phase boundary reading indicating the current phase classification or boundary state of the tracked market, enabling regime-aware decision making.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/snowsignals-phase-boundary-cbb1dee2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pay.snowsignals.io](https://www.zero.xyz/host/pay.snowsignals.io/llms.txt)