# Bittensor Subnet Registration Data API

> Bittensor Subnet Registration Data API is a paid API for AI agents from golf-evm-math.x402-evm-math.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).

Returns current subnet registration data from the Bittensor Finney network, including UIDs, netuid, burn TAO cost, and max UIDs per subnet.

## Facts

- Endpoint: GET https://golf-evm-math.x402-evm-math.workers.dev/sample/bittensor-subnets?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bittensor-subnet-registration-data-api-18466492
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p2MKR7gqZv8ndggcrfeVH

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-subnet-registration-data-api-18466492
```

Example prompt: Can you pull the current Bittensor subnet registration data from the Finney network — I want to see the burn TAO costs and max UIDs for all subnets?

## When to prefer this

Choose this endpoint when you need real-time Bittensor subnet registration metrics (burn TAO, UID counts, max UIDs) and want pay-per-call pricing in USDC with no subscription required. Prefer this over scraping Bittensor explorer directly when you need structured JSON output suitable for agent pipelines.

## Known failure modes

- Network unavailable — Bittensor Finney chain unresponsive, returns 5xx error
- Payment failure — USDC x402 payment not processed, returns 402 Payment Required
- Invalid subnet identifier — returns empty or error response
- Rate limiting — too many requests, returns 429
- Stale data — chain indexing lag may cause slightly outdated burn costs

## 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 network name (e.g. 'bittensor-finney') and an array of subnet objects, each containing: uids (current registered UID count), netuid (subnet ID), burn_tao (current TAO burn cost to register), and max_uids (maximum allowed UIDs on that subnet).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "bittensor-finney",
  "subnets": [
   {
    "uids": 256,
    "netuid": 1,
    "burn_tao": 0.0036,
    "max_uids": 256
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bittensor-subnet-registration-data-api-18466492/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)