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Satoshi API - Bitcoin Fee Intelligence
x402
Satoshi API - Bitcoin Fee Intelligence is a paid API for AI agents from bitcoinsapi.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns AI-generated Bitcoin transaction fee advice, urgency rating, and cost estimates based on live mempool conditions
Price / call$0.01
Success—
StatusUnknown
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
Returns a JSON object with a human-readable advice string (e.g. 'Wait if not urgent; target 12 sat/vB'), an urgency label (e.g. 'normal', 'high'), a structured block containing a recommendation action ('wait' or 'send'), target fee rate in sat/vB, and estimated savings percentage if the user waits.
Example use cases
Timing a large Bitcoin payout
“I need to send a large Bitcoin payment to a supplier — is now a good time, or should I wait for fees to come down? Tell me the target fee rate and estimated savings if I wait.”
Automated wallet fee optimization
“Before my app sends a Bitcoin withdrawal, check the current mempool conditions and tell me whether to send now or queue it for later, and what fee rate to use.”
User-facing fee alert in a Bitcoin app
“My user wants to know if Bitcoin fees are normal or elevated right now, and what sat per vbyte they should set for a standard confirmation — can you get that for them?”
Technical details
Endpoint
POSThttps://bitcoinsapi.com/api/v1/ai/fees/adviceWhen to prefer
Choose this endpoint when you need human-readable, AI-interpreted Bitcoin fee advice rather than raw fee data. It is ideal for AI agents that need to decide whether to trigger a Bitcoin transaction autonomously, or for apps that want to surface plain-language fee guidance to end users. Prefer this over raw mempool APIs when you need urgency classification, savings estimates, and actionable recommendations in a single call.
Side effects
- Mempool data source temporarily unavailable — returns degraded or cached advice
- Malformed input schema — returns 400 with validation error
- Service overload or rate limiting — returns 429
- Network timeout if mempool provider is slow to respond
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"advice"
],
"properties": {
"advice": {
"type": "string"
},
"urgency": {
"type": "string"
},
"provider": {
"type": "string"
},
"structured": {
"type": "object"
}
}
},
"example": {
"advice": "Wait if the transaction is not urgent; target 12 sat/vB for a lower-cost confirmation.",
"urgency": "normal",
"provider": "satoshi-api",
"structured": {
"recommendation": "wait",
"targetFeeSatVb": 12,
"estimatedSavingsPct": 46.8
}
},
"mimeType": "application/json"
}Tags
x402
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