Provides market value prices for numismatic coins
Provides market value prices for numismatic coins.
Answeringour last check, 2026-10-20
1 of 1checks answered this week
2657 msmedian answer time
$0.0051listed price per call
$0.0051price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.powahub.ai/b06c5e0be3b344409b7829997f6e3be9-cd/coin-valuation/valuation
| Category | Market data |
|---|---|
| Provider host | api.powahub.ai |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.0051 | 2657 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"denomination": "string",
"fineness": "string",
"grade": "string",
"issuer": "string",
"metal": "string",
"mint_mark": "string",
"series": "string",
"slabbed": "string",
"strike_type": "string",
"variant": "string",
"weight_oz": "string",
"window_from": "string",
"window_sales": "string",
"window_to": "string",
"year": "string"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"denomination": {
"description": "The coin's denomination, e.g. Florin, Crown.",
"type": "string"
},
"fineness": {
"description": "Purity as a decimal, e.g. 0.925 (0.9250 matches too).",
"type": "string"
},
"grade": {
"description": "Only sales of this grade count, e.g. very_fine or Very Fine.",
"type": "string"
},
"issuer": {
"description": "Issuing authority as stored, e.g. United Kingdom of Great Britain and Ireland.",
"type": "string"
},
"metal": {
"description": "e.g. Silver, Gold",
"type": "string"
},
"mint_mark": {
"description": "The mint mark as struck, e.g. S, SA. Leave out if none or unknown.",
"type": "string"
},
"series": {
"description": "The series, e.g. Britannia.",
"type": "string"
},
"slabbed": {
"description": "true: only coins sold in a grading slab; false: all others. Lower case.",
"type": "string"
},
"strike_type": {
"description": "How it was struck: business, proof, reverse_proof, matte_proof, specimen, brilliant_uncirculated or bullion (the label works too, e.g. Proof).",
"type": "string"
},
"variant": {
"description": "A variety or treatment, e.g. Piedfort.",
"type": "string"
},
"weight_oz": {
"description": "Fine metal content in troy ounces, e.g. 1 for a 1 oz bullion coin. Bullion coins only.",
"type": "string"
},
"window_from": {
"description": "Only sales from this date, YYYY-MM-DD. Not with window_sales.",
"type": "string"
},
"window_sales": {
"description": "Number of most recent sales to use, 1\u2013500 (integer). Not with a date range.",
"type": "string"
},
"window_to": {
"description": "Only sales up to this date, YYYY-MM-DD.",
"type": "string"
},
"year": {
"description": "Year as struck, e.g. 1906, 1821.",
"type": "string"
}
},
"required": [
"denomination"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}