# Saylor Innovations Coin & Denomination Reference

> Saylor Innovations Coin & Denomination Reference is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Looks up reference data for a coin or denomination by name, returning issuing countries, materials, designers, and image URLs sourced from Wikidata

## Facts

- Endpoint: GET https://saylorinnovations.com/api/numismatics/coin?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-coin-denomination-reference-c80d79c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4njKPir7A05gXga1k2k3m

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-coin-denomination-reference-c80d79c1
```

Example prompt: Can you look up reference info on the Morgan silver dollar — I want to know what countries issued it, what it's made of, who designed it, and if there's an image available?

## When to prefer this

Use this endpoint when you need structured reference data about a specific coin or currency denomination — including its issuing countries, metal composition, designer, and imagery — especially when building numismatic catalogs, enriching coin descriptions, or answering historical currency questions. Prefer this over general web search when you need structured Wikidata-backed fields rather than free-text paragraphs.

## Known failure modes

- No match found (found: false) when the coin name is misspelled or too obscure for Wikidata coverage
- Ambiguous name returns alternate_matches instead of a definitive result
- Image URL may be null if Wikidata has no associated image
- Inception date may be null for ancient or poorly documented coins
- Caveat field warns of data quality limitations from Wikidata source

## How this service works

Coin and denomination reference - issuing countries, materials, designers and images (Wikidata)

## Output

A JSON object indicating whether the lookup matched a record, along with the coin's canonical name, Wikidata identifier, issuing countries, materials, designers, image URL, short description, inception date, Wikipedia URL, the interpreted query, a data caveat, the source, and any alternate candidate matches if ambiguous.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "description": "required coin or denomination name, 2-100 plain-text characters (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "found",
      "name",
      "wikidata_id",
      "countries",
      "materials",
      "caveat"
     ],
     "properties": {
      "name": {
       "type": "string",
       "description": "Name"
      },
      "found": {
       "type": "boolean",
       "description": "True when the lookup matched a record"
      },
      "image": {
       "type": [
        "string",
        "null"
       ],
       "description": "Image URL"
      },
      "query": {
       "type": "string",
       "description": "The query as the server interpreted it"
      },
      "caveat": {
       "type": "string",
       "description": "Caveat to keep in mind when using this result"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "countries": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Countries"
      },
      "designers": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "inception": {
       "type": [
        "string",
        "null"
       ],
       "description": "Date the entity was founded or created"
      },
      "materials": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "wikipedia": {
       "type": [
        "string",
        "null"
       ],
       "description": "Wikipedia article URL"
      },
      "description": {
       "type": [
        "string",
        "null"
       ],
       "description": "Short description"
      },
      "wikidata_id": {
       "type": "str
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-coin-denomination-reference-c80d79c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)