# HyperExtend Asset Context Latest Rows

> HyperExtend Asset Context Latest Rows is a paid API for AI agents from api.hyperextend.xyz, paid per call via x402, $0.0034/call, status unknown (last checked 2026-09-15).

Returns the most-recent N asset-context rows for a given crypto asset (e.g. BTC), optionally filtered by DEX.

## Facts

- Endpoint: GET https://api.hyperextend.xyz/v1/asset_ctx/BTC/latest
- Price: $0.0034/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hyperextend-asset-context-latest-rows-e0fb2a23
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qx8Xib-ewOFIH5X1VL7Ny

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 hyperextend-asset-context-latest-rows-e0fb2a23
```

Example prompt: Give me the last 20 asset-context rows for BTC from HyperExtend — include any available DEX filter for the main perp market.

## When to prefer this

Use this endpoint when you need the freshest available snapshots of asset-level market context (open interest, funding, mark, oracle, volumes) for a specific coin without specifying a time window. Prefer it over windowed endpoints when you want the latest N rows rather than a historical range, and over OHLCV endpoints when you need richer per-minute context beyond just candle data.

## Known failure modes

- Unknown or unsupported coin symbol returns 404 or empty result
- Invalid value for n (non-integer or out of range) returns 400 validation error
- Unknown dex filter value may return empty rows or 400
- Payment failure (x402) returns 402 if USDC balance is insufficient
- Rate limiting may return 429 if too many requests are made in quick succession

## How this service works

The most-recent N open-interest / funding / ctx rows (≤5000). Priced per row ($0.000025 premium); served live (no lag).

## Output

A list of the most-recent N asset-context rows for the requested coin, each containing market context data such as open interest, funding rates, mark price, oracle price, mid price, and volume metrics as of that snapshot timestamp.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "pathParams": {
   "coin": "BTC"
  },
  "queryParams": {
   "n": 10
  }
 }
}
```

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "coin"
     ],
     "properties": {
      "coin": {
       "type": "string",
       "description": "Asset symbol, e.g. BTC"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "n": {
       "type": "integer"
      },
      "dex": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hyperextend-asset-context-latest-rows-e0fb2a23/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hyperextend.xyz](https://www.zero.xyz/host/api.hyperextend.xyz/llms.txt)