---
title: "eth_getProof"
description: "Returns account and storage Merkle proofs for an address at a block (Polygon)"
url: "https://blockreq.com/docs/build/api-reference/polygon/eth_getProof/"
---

# eth_getProof

> **API key required.** This Polygon method is documented for keyed private endpoints. It is not available on `/v1/rpc/public`. [Create an endpoint](https://blockreq.com/docs/getting-started/create-endpoint/index.md) to get an API key.

**Network:** Polygon · Mainnet · Chain ID `137` (`0x89`)

**Counts as 3 requests.** See [Request Counting](https://blockreq.com/docs/pricing/request-counting/index.md).

`eth_getProof` returns an account proof plus optional storage proofs for an address at a block tag. Historical block tags require historical state on that chain.

## Parameters

1. `DATA` - 20-byte account address.
2. `Array<DATA>` - Storage slot keys to prove.
3. `QUANTITY|TAG` - Block number or tag.

## Request

```json
{
  "jsonrpc": "2.0",
  "method": "eth_getProof",
  "params": ["0x0000000000000000000000000000000000000000", [], "0x1"],
  "id": 1
}
```

## Notes

- Available only on EVM chains that support account proofs.
- Use paid endpoints for production proof workloads and old-block state access.
- If a chain page does not list historical state, treat historical proof support as unavailable.

## Code Examples

**cURL**

```bash
curl -X POST https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000 \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_getProof","params":["0x0000000000000000000000000000000000000000",[],"0x1"],"id":1}'
```

**TypeScript**

```typescript
const response = await fetch("https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "jsonrpc": "2.0",
  "method": "eth_getProof",
  "params": [
    "0x0000000000000000000000000000000000000000",
    [],
    "0x1"
  ],
  "id": 1
}),
});
const data = await response.json();
console.log(data.result);
```

**Python**

```python
import requests

response = requests.post(
    "https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000",
    json={
  "jsonrpc": "2.0",
  "method": "eth_getProof",
  "params": [
    "0x0000000000000000000000000000000000000000",
    [],
    "0x1"
  ],
  "id": 1
}
)
print(response.json()["result"])
```

**Go**

```go
package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

func main() {
	payload := []byte(`{"jsonrpc":"2.0","method":"eth_getProof","params":["0x0000000000000000000000000000000000000000",[],"0x1"],"id":1}`)
	resp, err := http.Post(
		"https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000",
		"application/json",
		bytes.NewBuffer(payload),
	)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	body, _ := io.ReadAll(resp.Body)
	var result map[string]interface{}
	json.Unmarshal(body, &result)
	fmt.Println(result["result"])
}
```

**viem**

```typescript
import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000"),
});

const result = await client.request({
  method: "eth_getProof",
  params: ["0x0000000000000000000000000000000000000000",[],"0x1"],
});
console.log(result);
```

**Foundry**

```bash
cast rpc --rpc-url https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000 eth_getProof 0x0000000000000000000000000000000000000000 [] 0x1
```

**Hardhat**

```javascript
const { ethers } = require("hardhat");

async function main() {
  const provider = new ethers.JsonRpcProvider("https://polygon-bor-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000000");
  const result = await provider.send("eth_getProof", ["0x0000000000000000000000000000000000000000",[],"0x1"]);
  console.log(result);
}

main();
```