# USDC & EURC Blacklist Events

> USDC & EURC Blacklist Events is a paid API for AI agents from www.blockchainiq.co, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Returns Circle USDC and EURC stablecoin control events (blacklistings, pauses, minter changes, role changes, proxy upgrades) on Ethereum, Base, and Arbitrum, newest first.

## Facts

- Endpoint: GET https://www.blockchainiq.co/api/x402/v1/stablecoins/events?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usdc-eurc-blacklist-events-4232f8ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V5rffjkOGCumto6_2qkeF

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 usdc-eurc-blacklist-events-4232f8ab
```

Example prompt: Pull the latest USDC blacklist and unblacklist events from the past 30 days on Ethereum — I want to see which addresses were frozen or unfrozen by Circle.

## When to prefer this

Choose this endpoint when you need to monitor or audit Circle's issuer control actions — specifically blacklistings, pauses, minter changes, role updates, or contract upgrades — on USDC or EURC contracts across Ethereum, Base, or Arbitrum. It is the right choice for compliance workflows, wallet screening, DeFi risk monitoring, or on-chain governance tracking. Prefer it over generic blockchain explorers when you need pre-parsed, filtered, and categorized stablecoin control events without writing your own log parsing.

## Known failure modes

- Invalid 'since' date beyond 90 days ago returns an error
- Unsupported chain, token, or type enum values return a validation error
- Invalid or expired cursor returns a pagination error
- No events found for the specified filters returns an empty result set
- Service unavailable or rate limiting returns a non-200 HTTP status

## How this service works

Circle USDC and EURC control events on Ethereum, Base and Arbitrum, newest first: blacklistings and reversals, pauses, minter allowances, role changes and proxy upgrades, each with block, time, transaction and address. Since a date (up to 90 days back), filter by chain, token and type, 500 a page. Use to monitor freezes and issuer control actions. From the contracts' own logs, refreshed daily. JSON, no API key. $0.01 per call. Blockchain IQ.

## Output

A paginated JSON list of stablecoin control events, each including event type (e.g. Blacklisted, UnBlacklisted, MinterConfigured, Upgraded), block number, block timestamp, transaction hash, and relevant addresses. A nextCursor field is included when more pages are available. Events are sourced directly from on-chain contract logs and refreshed daily.

## 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": {
      "type": {
       "enum": [
        "blacklist",
        "pause",
        "minter",
        "role",
        "upgrade"
       ],
       "type": "string",
       "description": "blacklist (Blacklisted, UnBlacklisted), pause, minter (MinterConfigured, MinterRemoved), role (role holder changes), upgrade (Upgraded, AdminChanged)"
      },
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "arbitrum"
       ],
       "type": "string"
      },
      "since": {
       "type": "string",
       "format": "date",
       "description": "First UTC day, at most 90 days ago; default 30 days ago"
      },
      "token": {
       "enum": [
        "USDC",
        "EURC"
       ],
       "type": "string"
      },
      "cursor": {
       "type": "string",
       "description": "nextCursor from the previous page"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usdc-eurc-blacklist-events-4232f8ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.blockchainiq.co](https://www.zero.xyz/host/www.blockchainiq.co/llms.txt)