OneSource Ethereum Pending Block RPC

x402

OneSource Ethereum Pending Block RPC is a paid API for AI agents from api.onesource.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the current pending block data (hash, number, transaction count) for Ethereum mainnet or Sepolia testnet

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Pending block - transactions not yet mined, via eth_getBlockByNumber("pending")

Output

A JSON object containing the pending block's hash (may be null), hexadecimal block number, and transaction count for the requested network (ethereum or sepolia).

Example use cases

Example prompt

“What's the current pending block on Ethereum mainnet — give me the block number and how many transactions are in it?”

Technical details

Endpoint

GEThttps://api.onesource.io/api/chain/pending

When to prefer

Use this endpoint when you need real-time pending block state on Ethereum mainnet or Sepolia testnet without an API key, paying only per call via USDC on Base or Tempo. Prefer this over Infura/Alchemy when you want pay-per-use with no subscription and micropayment-native access.

Side effects

Invalid network enum value returns an error
Node unavailability may return 5xx
Payment failure via x402/MPP returns 402
No pending block available may return null hash

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {
      "result": {
        "number": "0x133da1f",
        "gasUsed": "0xa7d8c0",
        "gasLimit": "0x1c9c380",
        "timestamp": "0x6567c8ec",
        "transactions": [
          {
            "to": "0xdac17f958d2ee523a2206206994597c13d831ec7",
            "gas": "0x5208",
            "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
            "hash": "0xad7e04119ecd85857728205f5b12e95f0bab8e99f9c2f60be5dc79cfc6a8df1f",
            "nonce": "0x4d2",
            "value": "0x0"
          }
        ]
      }
    },
    "meta": {
      "endpoint": "/api/chain/pending",
      "cost_usdc": "0.001",
      "request_id": "00000000abcdef01",
      "payment_chain": "base",
      "payment_token": "USDC"
    }
  }
}

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Technical details

Endpoint

GEThttps://api.onesource.io/api/chain/pending

When to prefer

Side effects

Invalid network enum value returns an error
Node unavailability may return 5xx
Payment failure via x402/MPP returns 402
No pending block available may return null hash

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {
      "result": {
        "number": "0x133da1f",
        "gasUsed": "0xa7d8c0",
        "gasLimit": "0x1c9c380",
        "timestamp": "0x6567c8ec",
        "transactions": [
          {
            "to": "0xdac17f958d2ee523a2206206994597c13d831ec7",
            "gas": "0x5208",
            "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
            "hash": "0xad7e04119ecd85857728205f5b12e95f0bab8e99f9c2f60be5dc79cfc6a8df1f",
            "nonce": "0x4d2",
            "value": "0x0"
          }
        ]
      }
    },
    "meta": {
      "endpoint": "/api/chain/pending",
      "cost_usdc": "0.001",
      "request_id": "00000000abcdef01",
      "payment_chain": "base",
      "payment_token": "USDC"
    }
  }
}