# Blockscout Account Abstraction Paymaster Lookup

> Blockscout Account Abstraction Paymaster Lookup 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).

Retrieve paymaster address details and total operation count for a given paymaster on a specified blockchain via Blockscout's account abstraction proxy

## Facts

- Endpoint: GET https://api.blockscout.com/%7Bchain_id%7D/api/v2/proxy/account-abstraction/paymasters/%7Baddress_hash_param%7D
- 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-paymaster-lookup-05dde7c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yGGZQnbfbXHGiL4cdIuT4

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-paymaster-lookup-05dde7c9
```

Example prompt: Can you pull up the paymaster details for address 0xE93eca6595fe94091DC1af46aaC2A8b5D7990770 on Base (chain ID 8453) using Blockscout — I want to know if it's verified, how many ops it's sponsored, and any public tags on it?

## When to prefer this

Use this endpoint when you need structured on-chain metadata and account abstraction operation statistics for a specific paymaster address on a particular blockchain supported by Blockscout. It is especially useful when you want to verify a paymaster's legitimacy (scam flag, verification status), understand its reputation and tagging, or count its sponsored operations — all in a single cross-chain-aware call. Prefer this over generic block explorers when you need programmatic, structured JSON data rather than a human-readable UI, or when operating across multiple EVM chains via a unified API.

## Known failure modes

- Invalid or malformed address_hash_param returns an error or empty result
- Unsupported chain_id returns a 404 or chain-not-found error
- Non-paymaster address returns a result with total_ops of 0 and no paymaster-specific metadata
- Rate limiting or payment failure returns a 402 or 429 response
- Address not indexed by Blockscout on the specified chain returns empty or null fields

## 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

Returns a JSON object containing the paymaster's address details (hash, name, scam flag, reputation, contract status, verification status, proxy type, ENS domain, public/private tags, watchlist names, implementations metadata) and the total number of account abstraction operations (total_ops) sponsored by that paymaster on the specified chain.

## 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"
      },
      "address_hash_param": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "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"
    }
   ]
  },
  "total_ops": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-account-abstraction-paymaster-lookup-05dde7c9/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)