# eurostablecoins Supply Aggregate

> eurostablecoins Supply Aggregate is a paid API for AI agents from www.eurostablecoins.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the latest on-chain circulating and total supply for every active euro stablecoin, plus a headline EUR aggregate across all coins.

## Facts

- Endpoint: GET https://www.eurostablecoins.xyz/api/x402/v1/supply
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eurostablecoins-supply-aggregate-edbd6676
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EPnzo7-edIcKlwyTQ6Wb8

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 eurostablecoins-supply-aggregate-edbd6676
```

Example prompt: What's the current total circulating supply of all euro stablecoins on-chain, and which coins are included in the aggregate?

## When to prefer this

Use this endpoint when you need a single-call snapshot of the entire euro stablecoin landscape — all coins, all issuers, plus the aggregate EUR total — rather than looking up one coin at a time. Prefer this over per-coin endpoints when you need market-wide supply totals, issuer comparisons, or to populate a dashboard. It is the fastest way to get the headline 'total EUR tokenized on-chain' figure.

## Known failure modes

- Payment failure (x402): call requires $0.01 USDC payment; insufficient balance or unsupported wallet returns payment error
- Stale data: data_as_of timestamp may lag if on-chain indexing is delayed
- Empty or partial coin list: newly launched or delisted stablecoins may be missing or have null supply fields
- Network/upstream error: on-chain data provider outage may return 5xx or incomplete response

## How this service works

Latest on-chain circulating and total supply for every active euro stablecoin, plus the headline aggregate (EUR).

## Output

A JSON object containing a list of all active euro stablecoins with per-coin fields (coin_id, ticker, name, issuer, circulating_supply, total_supply, treasury_held, recorded_at), plus a headline aggregate of total EUR circulating supply (total_circulating_eur), coin count, and a data_as_of timestamp indicating data freshness.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "coin_count",
      "coins",
      "currency",
      "source"
     ],
     "properties": {
      "coins": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "coin_id",
         "ticker"
        ],
        "properties": {
         "name": {
          "type": [
           "string",
           "null"
          ]
         },
         "issuer": {
          "type": [
           "string",
           "null"
          ]
         },
         "ticker": {
          "type": "string"
         },
         "coin_id": {
          "type": "string"
         },
         "recorded_at": {
          "type": [
           "string",
           "null"
          ]
         },
         "total_supply": {
          "type": [
           "number",
           "null"
          ]
         },
         "treasury_held": {
          "type": [
           "number",
           "null"
          ]
         },
         "circulating_supply": {
          "type": [
           "number",
           "null"
          ]
         }
        },
        "additionalProperties": true
       }
      },
      "source": {
       "type": "string"
      },
      "currency": {
       "type": "string"
      },
      "coin_count": {
       "type": "number"
      },
      "data_as_of": {
       "type": [
        "string",
        "null"
       ]
      },
      "aggregate_coin_count": {
       "type": [
        "number",
        "null"
       ]
      },
      "total_circulating_eur": {
       "type": [
        "number",
        "null"
       ]
      }
     },
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eurostablecoins-supply-aggregate-edbd6676/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.eurostablecoins.xyz](https://www.zero.xyz/host/www.eurostablecoins.xyz/llms.txt)