# TradeOS VPIN Microstructure Stress

> TradeOS VPIN Microstructure Stress is a paid API for AI agents from tradeos.tech, paid per call via x402, $0.12/call, status unknown (last checked 2026-09-15).

Returns VPIN-based order-flow stress metrics and crash-pressure context for use as a pre-trade risk filter in crypto trading systems.

## Facts

- Endpoint: POST https://tradeos.tech/x402/v1/intelligence/tradeos-vpin-stress
- Price: $0.12/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tradeos-tech-836fee50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_71dziT4O4EvEO9HMupszA

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 tradeos-tech-836fee50 -d '<json body>'
```

Example prompt: Check the VPIN microstructure stress and crash-pressure context for ETH right now — I need to decide whether to let my trading bot proceed with a large order or hold off.

## When to prefer this

Choose this endpoint when you need VPIN-specific order-flow microstructure stress and crash-pressure signals — distinct from general market regime or token risk endpoints — specifically for gating pre-trade decisions in bots or screeners. Prefer it over the bundled intelligence endpoints when VPIN is the only signal needed to minimize cost ($0.12/call) and latency.

## Known failure modes

- Unknown or unsupported token symbol returns 404 or empty result
- Stale market data causes freshness warning in response
- Malformed request body returns 400 validation error
- Service unavailable or upstream data feed outage returns 503
- Insufficient USDC balance causes x402 payment failure

## How this service works

Check order-flow and crash-pressure stress before a bot or analyst acts. Returns active stress symbols, stress levels, how fast stress is changing, crash-pressure level, alert level, VPIN flow-risk v2 state, time-to-stress context, and recent VPIN shock incident evidence showing first seen, later low, drawdown, and minutes to low.

## Output

A JSON object containing the VPIN score, microstructure stress level, crash-pressure context, order-flow imbalance indicators, reasons/explanations, freshness metadata, and safety boundaries — all ready to plug into a pre-trade risk filter.

## Example request

```json
{
 "symbol": "ETH",
 "timeframe": "1h",
 "includeContext": true
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "output": {
       "type": "string"
      },
      "symbol": {
       "type": "string"
      },
      "chain_id": {
       "type": "string"
      },
      "metadata": {
       "type": "object"
      },
      "contract_address": {
       "type": "string"
      }
     },
     "additionalProperties": true
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "POST"
    },
    "bodyType": {
     "type": "string",
     "const": "json"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tradeos-tech-836fee50/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tradeos.tech](https://www.zero.xyz/host/tradeos.tech/llms.txt)