# x402-service Catalyst Grade

> x402-service Catalyst Grade is a paid API for AI agents from x402-service.pages.dev, paid per call via x402, $0.04/call, status down (last checked 2026-09-15).

Grades a market-moving headline into a structured trade signal including asset, direction, confidence, horizon, and invalidation level.

## Facts

- Endpoint: POST https://x402-service.pages.dev/catalyst-grade
- Price: $0.04/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-service-catalyst-grade-ca6d2bd9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Knk4QLcgAFEnk7LTyS4Ac

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 x402-service-catalyst-grade-ca6d2bd9 -d '<json body>'
```

Example prompt: Grade this headline into a trade signal for ETH and BTC: 'Federal Reserve signals surprise rate cut amid cooling inflation data — markets surge.' Give me the direction, confidence, time horizon, and invalidation level.

## When to prefer this

Use this endpoint when you have a specific news headline or market catalyst and need a structured, machine-readable trade signal (direction, confidence, horizon, invalidation) rather than a general market summary. Prefer this over web-search-grounded endpoints when the headline text is already known and you need fast, deterministic signal extraction rather than live research.

## Known failure modes

- Headline too vague or unrelated to financial markets — low-confidence or neutral signal returned
- Headline exceeds 4000 character limit — request rejected with validation error
- Payment not processed or x402 header missing — 402 Payment Required response
- Ambiguous asset context without tickers provided — signal may target wrong or generic asset
- Service unavailable or Cloudflare Pages outage — 5xx error

## How this service works

Grade a market-moving headline into a structured trade signal (asset, direction, confidence, horizon, invalidation).

## Output

A structured trade signal object specifying the relevant asset(s), directional call (long/short/neutral), a confidence score, a time horizon for the trade, and an invalidation condition — derived from AI analysis of the submitted headline.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "assets": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Optional asset tickers to consider (e.g. ETH, BTC)"
  },
  "headline": {
   "type": "string",
   "maxLength": 4000,
   "description": "Market-moving headline to grade into a trade signal (max 4000 chars)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-service-catalyst-grade-ca6d2bd9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-service.pages.dev](https://www.zero.xyz/host/x402-service.pages.dev/llms.txt)