# Blockscout Account Abstraction Operations Explorer

> Blockscout Account Abstraction Operations Explorer is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Retrieves paginated ERC-4337 UserOperation records for a specific blockchain network, filterable by sender, bundler, paymaster, factory, entry point, transaction hash, and block number

## Facts

- Endpoint: GET https://api.blockscout.com/%7Bchain_id%7D/api/v2/proxy/account-abstraction/operations
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockscout-account-abstraction-operations-explorer-8fc59a8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AcaLZMGmJKtE6fBrh_dxA

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 blockscout-account-abstraction-operations-explorer-8fc59a8c
```

Example prompt: Can you pull up all the ERC-4337 UserOperations sent by wallet 0xAbCd...1234 on Base (chain ID 8453) — show me the latest 25 and include their status, fees, and transaction hashes?

## When to prefer this

Use this endpoint when you need to query ERC-4337 account abstraction UserOperation data on a specific chain supported by Blockscout. It is ideal for auditing smart wallet activity, tracing bundler/paymaster relationships, or debugging account abstraction transactions across multiple chains. Prefer this over generic transaction explorers when you specifically need UserOp-level detail including entry point version, bundler identity, and paymaster info.

## Known failure modes

- Invalid or unsupported chain_id returns an error or empty result
- Unrecognized address formats for sender/bundler/paymaster/factory cause empty results
- No operations found for the given filters returns an empty items array
- Invalid transaction_hash format may return an error
- Pagination token mismatch or expiry causes out-of-order or duplicate results
- Rate limiting or payment failure returns 402 or 429 status

## How this service works

Explore crypto activities with Blockscout's multichain search. Find transactions, addresses, tokens, and dapps across top blockchain networks — your go-to explorer for cross-chain blockchain data

## Output

A paginated list of ERC-4337 UserOperation objects, each containing the operation hash, execution status (boolean), sender address with metadata (name, tags, ENS domain, contract/scam flags), entry point address with full metadata, block number, parent transaction hash, fee, timestamp, entry point version, and a next_page_params object for cursor-based pagination.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "properties": {
      "chain_id": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "sender": {
       "type": "string"
      },
      "bundler": {
       "type": "string"
      },
      "factory": {
       "type": "string"
      },
      "page_size": {
       "type": "integer"
      },
      "paymaster": {
       "type": "string"
      },
      "page_token": {
       "type": "string"
      },
      "entry_point": {
       "type": "string"
      },
      "items_count": {
       "type": "integer"
      },
      "block_number": {
       "type": "integer"
      },
      "bundle_index": {
       "type": "integer"
      },
      "transaction_hash": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "items": [
   {
    "fee": "string",
    "hash": "string",
    "status": true,
    "address": {
     "hash": "string",
     "name": "string",
     "is_scam": true,
     "metadata": {},
     "proxy_type": "string",
     "reputation": "string",
     "is_contract": true,
     "is_verified": true,
     "public_tags": [
      {
       "label": "string",
       "address_hash": "string",
       "display_name": "string"
      }
     ],
     "private_tags": [
      {
       "label": "string",
       "address_hash": "string",
       "display_name": "string"
      }
     ],
     "ens_domain_name": "string",
     "implementations": [
      {
       "name": "string",
       "address_hash": "string"
      }
     ],
     "watchlist_names": [
      {
       "label": "string",
       "display_name": "string"
      }
     ]
    },
    "timestamp": "string",
    "entry_point": {
     "hash": "string",
     "name": "string",
     "is_scam": true,
     "metadata": {},
     "proxy_type": "string",
     "reputation": "string",
     "is_contract": true,
     "is_verified": true,
     "public_tags": [
      {
       "label": "string",
       "address_hash": "string",
       "display_name": "string"
      }
     ],
     "private_tags": [
      {
       "label": "string",
       "address_hash": "string",
       "display_name": "string"
      }
     ],
     "ens_domain_name": "string",
     "implementations": [
      {
       "name": "string",
       "address_hash": "string"
      }
     ],
     "watchlist_names": [
      {
       "label": "string",
       "display_name": "string"
      }
     ]
    },
    "block_number": "string",
    "transaction_hash": "string",
    "entry_point_version": "string"
   }
  ],
  "next_page_params": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-account-abstraction-operations-explorer-8fc59a8c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockscout.com](https://www.zero.xyz/host/api.blockscout.com/llms.txt)