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Satoshi API - Bitcoin Fee Observatory Scoreboard
x402
Satoshi API - Bitcoin Fee Observatory Scoreboard is a paid API for AI agents from bitcoinsapi.com, paid per call via x402, $0.005/call, status down (last checked 2026-09-16).
Returns a ranked leaderboard of Bitcoin fee estimation sources by accuracy, showing which sources have the lowest mean absolute error in sat/vB predictions.
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
An array of ranked fee estimation sources, each with a source name, integer rank, sample count used for evaluation, and mean absolute error in sat/vB (satoshis per virtual byte). Lower mean absolute error indicates more accurate fee predictions. The Satoshi API's own source appears in the list for comparison.
Example use cases
Choosing the best fee oracle for a wallet
“I'm building a Bitcoin wallet and need to know which fee estimation source is currently the most accurate — can you pull up the fee estimator scoreboard and tell me which one has the lowest prediction error?”
Auditing fee source reliability before a large send
“Before I send a large Bitcoin transaction, can you check the fee observatory scoreboard to confirm that the fee source my app uses is still ranked #1 in accuracy?”
Comparing fee APIs for a new integration
“I need to decide which Bitcoin fee API to integrate into my service — can you fetch the current fee estimator leaderboard and compare the top sources by their mean absolute error in sat/vB?”
Technical details
Endpoint
POSThttps://bitcoinsapi.com/api/v1/fees/observatory/scoreboardWhen to prefer
Choose this endpoint when you need to objectively compare the accuracy of multiple Bitcoin fee estimation sources rather than just getting a fee recommendation. It is ideal for developers selecting a fee oracle for their application, auditing current fee source reliability, or verifying that a particular source is performing well before committing to a high-value transaction.
Side effects
- Invalid request body returns 400 with schema validation error
- Payment not included or rejected returns 402 Payment Required
- Service unavailable or mempool data stale returns 503
- Empty array returned if no sources have been evaluated recently
- Rate limiting may apply if payment fails to process
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "array",
"items": {
"type": "object",
"required": [
"source",
"rank"
],
"properties": {
"rank": {
"type": "integer"
},
"source": {
"type": "string"
},
"sampleCount": {
"type": "integer"
},
"meanAbsoluteErrorSatVb": {
"type": "number"
}
}
}
},
"example": [
{
"rank": 1,
"source": "satoshi-api",
"sampleCount": 144,
"meanAbsoluteErrorSatVb": 2.1
}
],
"mimeType": "application/json"
}Tags
x402
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