# Pocket Network – Arbitrum One JSON-RPC

> Pocket Network – Arbitrum One JSON-RPC is a paid API for AI agents from agent.pocket.network, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-03).

Provides read-only Ethereum-compatible JSON-RPC access to the Arbitrum One Nitro optimistic rollup, routed through the Pocket Network decentralised supplier set, paid per-request in USDC.

## Facts

- Endpoint: POST https://agent.pocket.network/v1/arb-one?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pocket-network-arbitrum-one-json-rpc-0f3601dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dSEZQSpOKYu1D6d3hA83y

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 pocket-network-arbitrum-one-json-rpc-0f3601dd -d '<json body>'
```

Example prompt: What is the current ETH balance of 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe on Arbitrum One? Use eth_getBalance with the latest block.

## When to prefer this

Choose this endpoint when you need permissionless, keyless, pay-per-request read access to Arbitrum One without managing API keys or accounts. It is ideal for agents that need sporadic or unpredictable query volumes, want to avoid vendor lock-in via decentralised infrastructure, or need to call standard Ethereum JSON-RPC methods against Arbitrum One in a serverless or autonomous context.

## Known failure modes

- Invalid or unsupported JSON-RPC method returns error code -32601
- Malformed params return error code -32602 (invalid params)
- Write methods (eth_sendRawTransaction) are rejected — endpoint is read-only
- Payment failure or insufficient USDC balance causes HTTP 402 before the RPC call is attempted
- Rate or supplier capacity issues may return HTTP 503 or a timeout
- Requesting a pruned historical block may return null or partial data

## How this service works

Read-only JSON-RPC access to Arbitrum One, the Nitro optimistic rollup on Ethereum, served by the Pocket Network decentralised supplier set. Pay per request in USDC; no account, no API key.

## Output

A standard Ethereum JSON-RPC response object containing a `result` field (block object, balance in wei, receipt object, log array, gas estimate as hex, etc.) or an `error` object with a code and message if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string",
   "examples": [
    "eth_accounts",
    "eth_blobBaseFee",
    "eth_blockNumber",
    "eth_call",
    "eth_chainId",
    "eth_config",
    "eth_createAccessList",
    "eth_estimateGas",
    "eth_feeHistory",
    "eth_gasPrice",
    "eth_getBalance",
    "eth_getBlockByHash",
    "eth_getBlockByNumber",
    "eth_getBlockReceipts",
    "eth_getBlockTransactionCountByHash",
    "eth_getBlockTransactionCountByNumber",
    "eth_getCode",
    "eth_getFilterChanges",
    "eth_getFilterLogs",
    "eth_getLogs",
    "eth_getProof",
    "eth_getStorageAt",
    "eth_getTransactionByBlockHashAndIndex",
    "eth_getTransactionByBlockNumberAndIndex",
    "eth_getTransactionByHash",
    "eth_getTransactionCount",
    "eth_getTransactionReceipt",
    "eth_getUncleByBlockHashAndIndex",
    "eth_getUncleByBlockNumberAndIndex",
    "eth_getUncleCountByBlockHash",
    "eth_getUncleCountByBlockNumber",
    "eth_maxPriorityFeePerGas",
    "eth_newBlockFilter",
    "eth_newFilter",
    "eth_newPendingTransactionFilter",
    "eth_simulateV1",
    "eth_syncing",
    "eth_uninstallFilter",
    "net_listening",
    "net_version",
    "web3_clientVersion",
    "web3_sha3"
   ],
   "description": "JSON-RPC read method, e.g. eth_getBalance"
  },
  "params": {
   "description": "Parameters per the Ethereum JSON-RPC spec"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "id": 1,
   "result": false,
   "jsonrpc": "2.0"
  },
  "portal": {
   "serviceId": "arb-one",
   "provenance": "third-party-supplier",
   "schemaCheck": "passed"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pocket-network-arbitrum-one-json-rpc-0f3601dd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.pocket.network](https://www.zero.xyz/host/agent.pocket.network/llms.txt)