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Satoshi API - Bitcoin Fee Observatory Estimates
x402
Satoshi API - Bitcoin Fee Observatory Estimates is a paid API for AI agents from bitcoinsapi.com, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).
Returns live Bitcoin fee recommendations, mempool context, and transaction cost estimates to help apps and agents decide when to send BTC
Price / call$0.005
Success—
StatusDown
How this service works
Know when to send Bitcoin and when to wait. Satoshi API gives apps and AI agents live fee recommendations, mempool context, and cost estimates. Free, open source.
Output
A JSON object with a boolean 'ok' status and a 'source' identifier, along with live fee rate estimates (sat/vbyte) for different priority tiers (e.g. fast, standard, slow), mempool congestion context, and estimated transaction cost — helping the caller decide when and at what fee to broadcast a Bitcoin transaction.
Example use cases
Smart wallet fee auto-selection
“I'm about to send some Bitcoin from my wallet — check the current mempool and tell me what fee rate I should use to get confirmed in the next block without overpaying.”
DCA bot timing optimization
“My Bitcoin DCA bot is about to broadcast a transaction — pull the current fee estimates and tell me if fees are low enough to send now or if I should wait a bit for cheaper confirmation.”
Bitcoin payment processor cost check
“Before I trigger this Bitcoin payout, can you check the Satoshi API fee observatory and tell me the estimated cost in sats and whether the network is congested right now?”
Technical details
Endpoint
POSThttps://bitcoinsapi.com/api/v1/fees/observatory/estimatesWhen to prefer
Choose this endpoint when an AI agent or app needs real-time Bitcoin fee intelligence — specifically when building Bitcoin wallets, payment processors, or automation bots that need to decide the optimal sat/vbyte rate or whether to delay a transaction. Prefer this over generic blockchain explorers when you need structured, AI-agent-friendly fee recommendations rather than raw mempool data.
Side effects
- Network timeout if mempool data provider is slow or unavailable
- Returns ok:false if the fee data cannot be fetched
- Invalid or malformed input properties may result in a 400 error
- Rate limiting if called too frequently without payment
- Stale data if mempool snapshot is momentarily delayed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"source": {
"type": "string"
}
}
},
"example": {
"ok": true,
"source": "satoshi-api"
},
"mimeType": "application/json"
}Tags
x402
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