# Price Discovery Engine

> Price Discovery Engine is a paid API for AI agents from phion.systems, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-16).

Reports price bands derived exclusively from settled, confirmed market observations

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/price-discovery-engine?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/price-discovery-engine-e5dae1e2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jZ5yRSP5WWPZS4kw_7Z42

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 price-discovery-engine-e5dae1e2 -d '<json body>'
```

Example prompt: What are the settled price bands for ETH right now — only based on confirmed, finalized observations, not pending or speculative data?

## When to prefer this

Choose this endpoint when you need price information grounded only in confirmed, finalized trade settlements — not real-time ticks, order book quotes, or unconfirmed pending transactions. Ideal for pre-trade validation, oracle sanity checks, or any workflow requiring defensible, evidence-backed price bounds rather than speculative market signals.

## Known failure modes

- Insufficient settled observations in the requested window returns an empty or degraded band
- Asset not recognized or unsupported returns an error or null result
- Time window too narrow to capture any finalized settlements yields no price band
- Stale or unavailable settlement data may cause the endpoint to return an error indicating data freshness issues

## How this service works

Report price bands only from settled observations

## Output

Returns structured price band data (lower and upper bounds) computed exclusively from settled, finalized market observations, along with associated confidence or coverage signals about the underlying data quality.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "example"
   ],
   "properties": {
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/price-discovery-engine-e5dae1e2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)