# Blockpin Treasury Snapshot

> Blockpin Treasury Snapshot is a paid API for AI agents from check.blockpin.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Returns the native ETH balance and all ERC-20 token balances of an Ethereum/Base/Robinhood Chain address at a specific block or the latest block, with block timestamp.

## Facts

- Endpoint: GET https://check.blockpin.dev/treasury?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockpin-treasury-snapshot-6b629c70
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QUKNIpLFs46NHaTGOlgqG

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 blockpin-treasury-snapshot-6b629c70
```

Example prompt: Can you pull the full treasury snapshot for 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum at block 19000000 — I want to see the native ETH balance and all ERC-20 holdings pinned to that block?

## When to prefer this

Use this endpoint when you need a precise, block-pinned snapshot of both native ETH and all ERC-20 token balances for a single address on Ethereum, Base, or Robinhood Chain. Prefer it over general block explorers when you need machine-readable multi-asset treasury data tied to a specific block for audit, verification, or runway analysis purposes. It is especially suited for verifying backing or reserve claims that reference a specific block number.

## Known failure modes

- Block too old for non-archive node — archive state required for historical blocks, may be refused before payment
- Invalid address format — must be a valid 0x-prefixed 40-character hex address
- Unsupported chain — only ethereum, base, and robinhood are valid chain values
- Too many token addresses — maximum 10 token addresses allowed in the tokens parameter
- Block not yet mined — requested block number is in the future
- Rate limiting or payment failure — x402 payment of $0.01 USDC required per call

## How this service works

Treasury snapshot: the native ETH balance and every ERC-20 balance of an address at a block (or now), read on-chain, with the block time. Use it to check treasury, runway or backing claims pinned to a block. Ethereum, Base and Robinhood Chain. Independent, by Blockpin; not a Claus Network service.

## Output

Returns a structured object containing the block number, block timestamp, native ETH balance, an array of ERC-20 token balances (contract address, symbol, decimals, raw and formatted amounts), and a plain-language summary of the treasury holdings at the specified block.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address"
     ],
     "properties": {
      "block": {
       "type": "string",
       "pattern": "^[0-9]+$",
       "description": "Optional block (default latest). Older blocks need archive state and may be refused before payment."
      },
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "robinhood"
       ],
       "type": "string"
      },
      "tokens": {
       "type": "string",
       "description": "Optional comma-separated token addresses (max 10). Default: tokens the explorer lists for the address."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "block",
      "summary",
      "native",
      "tokens"
     ],
     "properties": {
      "block": {
       "type": "number"
      },
      "native": {
       "type": "object"
      },
      "tokens": {
       "type": "array"
      },
      "summary": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockpin-treasury-snapshot-6b629c70/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from check.blockpin.dev](https://www.zero.xyz/host/check.blockpin.dev/llms.txt)