Bitcoin halving countdown
Bitcoin halving countdown: current block subsidy, blocks and estimated days to the next halving, plus coins mined and the share of 21 million.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
700 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/explorer/bitcoin/halving
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 700 ms |
Example input (from the provider)
{
"method": "GET",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"bitcoin_mined_btc": {
"description": "BTC created by block subsidies so far",
"type": "number"
},
"block_height": {
"description": "best block height",
"type": "number"
},
"blocks_until_halving": {
"description": "blocks remaining",
"type": "number"
},
"chain": {
"description": "the chain this describes",
"type": "string"
},
"current_subsidy_btc": {
"description": "block subsidy now, BTC",
"type": "number"
},
"estimated_days_until_halving": {
"description": "days remaining at 10-minute blocks",
"type": "number"
},
"estimated_halving_date_10min_blocks": {
"description": "estimated date at 10-minute blocks",
"type": "string"
},
"halving_era": {
"description": "number of halvings so far",
"type": "number"
},
"next_halving_height": {
"description": "block height of the next halving",
"type": "number"
},
"next_subsidy_btc": {
"description": "subsidy after the halving",
"type": "number"
},
"note": {
"description": "plain-language reading of the result, including units",
"type": "string"
},
"remaining_to_mine_btc": {
"description": "BTC still to be created",
"type": "number"
},
"share_of_21m_mined_pct": {
"description": "share of the 21 million cap",
"type": "number"
},
"source": {
"description": "where the data was read from",
"type": "string"
}
},
"required": [
"chain",
"block_height",
"current_subsidy_btc",
"next_halving_height",
"blocks_until_halving",
"estimated_halving_date_10min_blocks",
"bitcoin_mined_btc",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}