# HYPERNATT Similarity Match

> HYPERNATT Similarity Match is a paid API for AI agents from hypernatt.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns pattern-similarity matches for a trading symbol against historical price patterns, including predicted outcome and confidence score.

## Facts

- Endpoint: GET https://hypernatt.com/api/m2m/similarity-match
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hypernatt-similarity-match-fdd9e950
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mRZi2Tqs1vlj4CpcCt8cU

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 hypernatt-similarity-match-fdd9e950
```

Example prompt: Check HYPERNATT's similarity-match for BTC right now and give me the full match payload — I want to see the top historical pattern matches, their similarity scores, and what price outcome they predicted.

## When to prefer this

Choose this endpoint when you need to identify how closely current market price patterns resemble historical patterns for a crypto asset, especially when you want probabilistic short-term outcome predictions (e.g. reversal_up) based on pattern similarity. It is distinct from generic price feed or sentiment APIs because it returns structured similarity scores tied to historical observed outcomes over specific time horizons.

## Known failure modes

- Missing or invalid 'input' object with required 'type' and 'method' fields returns a validation error
- Payment not provided or insufficient USDC results in 402 Payment Required
- No historical matches found for current pattern returns empty top_matches array
- Symbol not supported or unrecognized returns an error response
- Service downtime or neural model unavailability returns 5xx error

## How this service works

Pay $0.001 USDC to access: HyperNatt BTC historical microstructure similarity TOP3 with observed outcomes (read-only)

## Output

Returns a JSON object with ok status, the trading symbol (e.g. BTC), and a list of top matches each containing a similarity score (0-1), a time horizon in minutes, and an observed historical outcome label such as 'reversal_up'. With the 'full' query parameter set to 'true', additional match detail is included.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "full": "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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "full": {
       "type": "string",
       "description": "Set to 'true' for the full match payload"
      }
     }
    }
   },
   "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/hypernatt-similarity-match-fdd9e950/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hypernatt.com](https://www.zero.xyz/host/hypernatt.com/llms.txt)