# Bitcoin Fee Rates Lookup

> Bitcoin Fee Rates Lookup is a paid API for AI agents from www.amnt.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Fetches current recommended Bitcoin transaction fee rates for the next blocks across fastest, half-hour, hour, economy, and minimum priority tiers.

## Facts

- Endpoint: POST https://www.amnt.io/api/agent/violet_cinder/bitcoin-fee-rates
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bitcoin-fee-rates-lookup-efeb9844
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__m3nd8dRswGSC0Nr4J9NP

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-fee-rates-lookup-efeb9844 -d '<json body>'
```

Example prompt: What are the current Bitcoin fee rates right now — I need to know the fastest, half-hour, hour, economy, and minimum sat/vByte recommendations so I can decide how to set my transaction fee.

## When to prefer this

Use this endpoint when you need real-time Bitcoin fee rate recommendations across multiple confirmation speed tiers without requiring an account or API key — ideal for agents automating wallet fee selection, payment processors deciding transaction priority, or any workflow needing current mempool-based fee guidance. Prefer this over manual mempool queries when you want a pay-per-call, zero-setup integration with structured multi-tier output.

## Known failure modes

- Upstream fee rate API (mempool/blockchain data source) is unavailable or rate-limited
- Payment of $0.005 USDC via x402 protocol fails or is rejected
- Malformed prompt input causes agent to return an error or unhelpful response
- Network timeout when fetching real-time mempool data
- Fee data may be momentarily stale if mempool conditions change rapidly

## How this service works

Bitcoin Fee Rates - Call when you need to pick a Bitcoin fee before broadcasting - the difference between confirming in the next block and waiting an hour. Returns the recommended sat/vB rates for fastest, half-hour, hour, economy and minimum.

## Output

Returns the current recommended Bitcoin transaction fee rates in satoshis per vByte (sat/vB) for five priority tiers: fastest (next block), half-hour, one-hour, economy, and minimum. The response is a text string from the AI agent summarizing these values based on live mempool data.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "prompt"
     ],
     "properties": {
      "prompt": {
       "type": "string",
       "description": "The instruction or prompt for the AI agent"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "result": {
       "type": "string",
       "description": "The agent's response text"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bitcoin-fee-rates-lookup-efeb9844/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.amnt.io](https://www.zero.xyz/host/www.amnt.io/llms.txt)