# Money Reactor — BTC Halving Countdown

> Money Reactor — BTC Halving Countdown is a paid API for AI agents from mr-river8.makar52nn2016.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the estimated date, block height, days remaining, and reward details for the next Bitcoin halving event

## Facts

- Endpoint: GET https://mr-river8.makar52nn2016.workers.dev/api/btc-halving?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/money-reactor-btc-halving-countdown-feee6a31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gC5mCVOiiE8rRSf0yuYrw

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 money-reactor-btc-halving-countdown-feee6a31
```

Example prompt: When is the next Bitcoin halving — how many days away is it, what block height does it happen at, and what will the block reward be afterward?

## When to prefer this

Choose this endpoint when you need a single structured snapshot of Bitcoin halving metrics — date estimate, days remaining, block heights, and reward schedule — paid per call with no API key or account setup, especially in automated agent workflows that need current halving data on demand via x402 micropayments on Base.

## Known failure modes

- Payment not included or insufficient USDC — returns 402 Payment Required
- Upstream block height data unavailable — may return stale or error response
- Network congestion on Base causing delayed x402 settlement — request may time out
- Invalid or missing x402 payment header — request rejected before processing

## How this service works

22 agent-native micro APIs paid per call in USDC on Base via x402: funded bounty radar, honeypot trust scoring, token safety verdicts, crypto prices, multi-asset price snapshots, fear & greed index, full market-pulse snapshot, AI chat completion (Llama 3.1), crypto news, weather, web reader, ERC-20 balances. No accounts, no API keys — instant on-chain settlement.

## Output

A JSON object containing: the estimated halving date (eta), the Bitcoin network name, days remaining (daysLeft), current block height (btcHeight), blocks remaining until halving (blocksLeft), post-halving block reward string (rewardAfter), halving sequence number (halvingNumber), and the target block height for the next halving (nextHalvingHeight).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "eta": "2029-03-01",
  "network": "bitcoin",
  "daysLeft": 937.5,
  "btcHeight": 915000,
  "blocksLeft": 135000,
  "rewardAfter": "1.5625 BTC",
  "halvingNumber": 5,
  "nextHalvingHeight": 1050000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/money-reactor-btc-halving-countdown-feee6a31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mr-river8.makar52nn2016.workers.dev](https://www.zero.xyz/host/mr-river8.makar52nn2016.workers.dev/llms.txt)