PowaHub
Provides market value prices for numismatic coins.
Offering
- Provider
- api.powahub.ai
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Other
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://api.powahub.ai/b06c5e0be3b344409b7829997f6e3be9-cd/coin-valuation/valuation- MIME type
- application/json
- First seen
- 2026-10-23T22:13:16.843Z
- Last seen
- Tags
- numismatics, market_value, valuation, coin_prices
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.0051 USDC
Atomic price: 5100 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "5100",
"payTo": "0x9A4fb84633C690e422c33491D1FCC319849E6BB0"
}
]Observed health
- Status
- Healthy
- Latest latency
- 1260 ms
- Average latency
- 1428 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 7 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET",
"HEAD",
"DELETE"
]
},
"queryParams": {
"type": "object",
"properties": {
"denomination": {
"type": "string",
"description": "The coin's denomination, e.g. Florin, Crown."
},
"year": {
"type": "string",
"description": "Year as struck, e.g. 1906, 1821."
},
"issuer": {
"type": "string",
"description": "Issuing authority as stored, e.g. United Kingdom of Great Britain and Ireland."
},
"metal": {
"type": "string",
"description": "e.g. Silver, Gold"
},
"grade": {
"type": "string",
"description": "Only sales of this grade count, e.g. very_fine or Very Fine."
},
"strike_type": {
"type": "string",
"description": "How it was struck: business, proof, reverse_proof, matte_proof, specimen, brilliant_uncirculated or bullion (the label works too, e.g. Proof)."
},
"mint_mark": {
"type": "string",
"description": "The mint mark as struck, e.g. S, SA. Leave out if none or unknown."
},
"series": {
"type": "string",
"description": "The series, e.g. Britannia."
},
"variant": {
"type": "string",
"description": "A variety or treatment, e.g. Piedfort."
},
"fineness": {
"type": "string",
"description": "Purity as a decimal, e.g. 0.925 (0.9250 matches too)."
},
"weight_oz": {
"type": "string",
"description": "Fine metal content in troy ounces, e.g. 1 for a 1 oz bullion coin. Bullion coins only."
},
"slabbed": {
"type": "string",
"description": "true: only coins sold in a grading slab; false: all others. Lower case."
},
"window_sales": {
"type": "string",
"description": "Number of most recent sales to use, 1–500 (integer). Not with a date range."
},
"window_from": {
"type": "string",
"description": "Only sales from this date, YYYY-MM-DD. Not with window_sales."
},
"window_to": {
"type": "string",
"description": "Only sales up to this date, YYYY-MM-DD."
}
},
"required": [
"denomination"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$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, 1–500 (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"
}