# Bittensor Registration Window Price API

> Bittensor Registration Window Price API is a paid API for AI agents from golf-evm-math.x402-evm-math.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-30).

Returns current, min, max, median, and hourly breakdown of Bittensor subnet registration window prices for a given netuid

## Facts

- Endpoint: GET https://golf-evm-math.x402-evm-math.workers.dev/bittensor/window?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bittensor-registration-window-price-api-9a8cc6ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ww1wBZXB6nsz-qLnsKGrY

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 bittensor-registration-window-price-api-9a8cc6ba
```

Example prompt: What's the current Bittensor subnet registration window price for netuid 1, and what hour of the day is cheapest to register?

## When to prefer this

Use this endpoint when you need real-time or historical Bittensor subnet registration window pricing, especially to time registrations optimally by UTC hour. Prefer this over generic blockchain RPC calls when you want pre-computed statistics (min, max, median, cheapest hour) without writing custom on-chain queries.

## Known failure modes

- Invalid or non-existent netuid returns an error or empty response
- Network connectivity issues to the Bittensor Finney chain may cause stale or missing data
- Payment failure (insufficient USDC on Base) results in 402 response blocking the call
- Rate limiting if too many requests are made in quick succession

## How this service works

Exact EVM address, calldata, Uniswap V2/V3 and impermanent-loss math. Pay per call in USDC on Base via x402.

## Output

Returns a JSON object with the netuid, network name (e.g. bittensor-finney), and a window object containing current, min, max, and median registration prices, a cheap_now flag, percentage of range, average price broken down by UTC hour, and the cheapest UTC hour for registration.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "netuid": 1,
  "window": {
   "max": 0.0029,
   "min": 0.0029,
   "median": 0.0029,
   "current": 0.0029,
   "cheap_now": null,
   "pct_of_range": null,
   "avg_by_utc_hour": {
    "22": 0.0029
   },
   "cheapest_utc_hour": "22"
  },
  "network": "bittensor-finney"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bittensor-registration-window-price-api-9a8cc6ba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from golf-evm-math.x402-evm-math.workers.dev](https://www.zero.xyz/host/golf-evm-math.x402-evm-math.workers.dev/llms.txt)