# Bitcoin Network Fee Estimator

> Bitcoin Network Fee Estimator is a paid API for AI agents from bitcoin-network.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-29).

Returns current Bitcoin fee rates (sat/vB) for fastest/half-hour/hour/economy confirmation tiers, mempool congestion level, and estimated USD/sats cost for a transaction of given size.

## Facts

- Endpoint: GET https://bitcoin-network.x402tookit.com/btc-fee-estimate?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bitcoin-network-fee-estimator-c5ea72cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zNScBcv-zOJh4TAVxZ4-j

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 bitcoin-network-fee-estimator-c5ea72cb
```

Example prompt: What are the current Bitcoin fee rates right now — how much in sats per vbyte and USD would a standard 141-vbyte SegWit transaction cost for next-block, half-hour, hour, and economy confirmation, and is the mempool congested?

## When to prefer this

Use this endpoint when you need live, multi-tier Bitcoin fee estimates with both sat/vB rates and fiat USD costs in a single call, especially when you also need mempool congestion context. It is preferable over raw mempool.space or similar when you want a pre-interpreted verdict/summary alongside the numbers, and when you need cost estimates scoped to a specific transaction size in vbytes.

## Known failure modes

- Upstream mempool data source unavailable — response may include degraded flag and reduced field set
- Invalid vbytes parameter type returns schema validation error
- Fee data may be stale if upstream provider is lagging — check asOf timestamp
- Network timeout if Bitcoin node or mempool API is temporarily unreachable

## How this service works

Bitcoin fee rates for next-block to economy confirmation, mempool congestion level and the cost of a typical transaction.

## Output

Returns fee rates in sat/vB for four confirmation speed tiers (fastest, halfHour, hour, economy), estimated transaction cost in sats and USD for each tier, mempool congestion label, mempool vsize, mempool tx count, backlog block depth, a human-readable summary and verdict, data source URL, and a timestamp. Optionally scoped to a custom transaction size in vbytes (default 141).

## 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",
     "required": [],
     "properties": {
      "vbytes": {
       "type": "integer",
       "description": "Transaction size in vbytes (default 141, a 1-in 2-out native SegWit send)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "cost": {
       "type": [
        "null",
        "object"
       ],
       "properties": {
        "hour": {
         "type": [
          "null",
          "object"
         ],
         "properties": {
          "usd": {
           "type": [
            "null",
            "number"
           ]
          },
          "sats": {
           "type": [
            "null",
            "number"
           ]
          }
         }
        },
        "economy": {
         "type": [
          "null",
          "object"
         ],
         "properties": {
          "usd": {
           "type": [
            "null",
            "number"
           ]
          },
          "sats": {
           "type": [
            "null",
            "number"
           ]
          }
         }
        },
        "fastest": {
         "type": [
          "null",
          "object"
         ],
         "properties": {
          "usd": {
           "type": [
            "null",
            "number"
           ]
          },
          "sats": {
           "type": [
            "null",
            "number"
           ]
          }
         }
        },
        "halfHour": {
         "type": [
          "null",
          "object"
         ],
         "properties": {
          "usd": {
           "type": [
            "null",
            "number"
           ]
          },
          "sats": {
           "type": [
            "null",
            "number"
           ]
          }
         }
        }
       }
      },
      "source": {
       "type": [
        "
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bitcoin-network-fee-estimator-c5ea72cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bitcoin-network.x402tookit.com](https://www.zero.xyz/host/bitcoin-network.x402tookit.com/llms.txt)