# Bittensor Subnet Info API

> Bittensor Subnet Info API is a paid API for AI agents from dominion-data.x402-evm-math.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns current Bittensor subnet metadata including UID count, burn TAO, max UIDs, and prune bar incentive for a given subnet on the Bittensor Finney network.

## Facts

- Endpoint: GET https://dominion-data.x402-evm-math.workers.dev/bittensor/subnet?utm_source=zero.xyz
- Price: $0.01/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-info-api-74156c8d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AaBmF1U__Ztgm1Sl9LEuG

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-info-api-74156c8d
```

Example prompt: Can you pull the current subnet parameters for Bittensor netuid 1 on Finney — things like how many UIDs are active, what the burn TAO is, and the max UID cap?

## When to prefer this

Use this endpoint when you need live Bittensor subnet parameters such as burn cost, UID slot availability, or prune bar incentive for the Finney mainnet. Prefer this over scraping the Bittensor website or using Taostats when you need machine-readable subnet data in an agent workflow and are willing to pay micro-fees per call via x402/USDC on Base.

## Known failure modes

- Invalid or non-existent netuid returns an error or empty response
- Payment failure (insufficient USDC balance on Base) results in 402 response blocking the call
- Network timeout if Bittensor Finney node is unreachable
- Rate limiting if too many requests are made without payment

## 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

A JSON object containing subnet metadata: the netuid, number of active UIDs, max UIDs allowed, burn TAO cost for registration, and the prune bar incentive threshold — all scoped to the Bittensor Finney mainnet.

## 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": {
  "subnet": {
   "uids": 256,
   "netuid": 1,
   "burn_tao": 0.0036,
   "max_uids": 256,
   "prune_bar_incentive": 0
  },
  "network": "bittensor-finney"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bittensor-subnet-info-api-74156c8d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dominion-data.x402-evm-math.workers.dev](https://www.zero.xyz/host/dominion-data.x402-evm-math.workers.dev/llms.txt)