getrawmempool

POST

https://btc.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns the TXIDs currently in the node mempool. By default the result is a list of TXIDs. With verbose=true the result is an object mapping each TXID to detailed mempool entry information, including vsize_adjusted and vsize_bip141 added in Bitcoin Core 32.1. A large mempool can produce a very large response. When verbose=false and mempool_sequence=true, returns txids and mempool_sequence.

Body

application/json

JSON-RPC payload for getrawmempool.

JSON-RPC request envelope sent to NOWNodes.

jsonrpcstringrequired

JSON-RPC protocol version.

idstring | integerrequired

Client-provided request ID echoed in the response.

methodstringgetrawmempoolrequired

JSON-RPC method name.

paramsArray<boolean>required

Parameters (positional order):

verbose (boolean, optional, default=false) — When true, return a map of transaction IDs to mempool metadata; otherwise return a list of TXIDs.
mempool_sequence (boolean, optional, default=false) — When verbose=false, include the mempool sequence number alongside TXIDs. Cannot be combined with verbose=true.

Response

200OK

Mempool data retrieved successfully, or JSON-RPC error returned in the response envelope.

401Unauthorized

Unauthorized: API key is present but rejected by the NOWNodes gateway.

405Method Not Allowed

Method Not Allowed. Returned by the NOWNodes gateway for malformed or unsupported gateway-level requests.

422Unprocessable Entity

Missing API key. The NOWNodes gateway returns plain text for this error.

500Internal Server Error

Internal Server Error

getrawmempool

curl -X POST 'https://btc.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "1.0",
    "id": "getrawmempool",
    "method": "getrawmempool",
    "params": [
      true
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://btc.nownodes.io/");
const result = await provider.send("getrawmempool", [
  true
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://btc.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "getrawmempool",
  "params": [
    true
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://btc.nownodes.io/"))
response = w3.provider.make_request("getrawmempool", [
  true
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://btc.nownodes.io/"),
});

const result = await client.request({
  method: "getrawmempool",
  params: [
  true
],
});

console.log(result);

const endpoint = "https://btc.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "getrawmempool", params: [
  true
], id: 1 });
console.log(result);

const response = await fetch('https://btc.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "1.0",
      "id": "getrawmempool",
      "method": "getrawmempool",
      "params": [
        true
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "1.0",
  "id": "getrawmempool",
  "method": "getrawmempool",
  "params": [
    true
  ]
}

response = requests.post('https://btc.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://btc.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "1.0",
    "id": "getrawmempool",
    "method": "getrawmempool",
    "params": [
      true
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "1.0",
  "id": "getrawmempool",
  "method": "getrawmempool",
  "params": [
    true
  ]
}

One TXID and its actual metadata from the supplied successful response. The full mempool result may contain many more TXIDs.

{
  "result": {
    "ee5df22bf88cf5305cf97a84720d934be47587809cbb650c762e6e680ac89154": {
      "vsize_adjusted": 110,
      "vsize": 110,
      "vsize_bip141": 110,
      "weight": 438,
      "time": 1793533366,
      "height": 974121,
      "descendantcount": 1,
      "descendantsize": 110,
      "ancestorcount": 1,
      "ancestorsize": 110,
      "wtxid": "6990dc45a15f97b296e456bfdd92352dc5cd8fc841e49dbad73635ca4f265c73",
      "chunkweight": 438,
      "fees": {
        "base": 0.00008505,
        "modified": 0.00008505,
        "ancestor": 0.00008505,
        "descendant": 0.00008505,
        "chunk": 0.00008505
      },
      "depends": [],
      "spentby": [],
      "unbroadcast": false
    }
  },
  "error": null,
  "id": "getrawmempool"
}

{
  "result": [
    "ee5df22bf88cf5305cf97a84720d934be47587809cbb650c762e6e680ac89154"
  ],
  "error": null,
  "id": "getrawmempool"
}

{
  "result": null,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  },
  "id": "getrawmempool"
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "result": [
    "string"
  ],
  "error": {
    "code": -32602,
    "message": "Invalid params"
  },
  "id": "string"
}