Stable RPC Endpoint

Flat-rate Stable RPC provider and Stable RPC node access: free tier, no KYC, HTTP & WebSocket. Stable mainnet chain ID 988.

Stable mainnet RPC URL: https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY

WebSocket: wss://rpc.swiftnodes.io/ws/stable?key=YOUR_API_KEY

Stable is a Layer 1 built for stablecoin payments, with USDT0 as its gas token. Access Stable RPC endpoints with SwiftNodes.

Network: Stable

Type: EVM

Chain ID: 988

Slug: stable

Native token: USDT0 (USDT0)

Category: Layer 1

Stable on the SwiftNodes fleet, right now

Status: online

Latency: 98 ms

Latest block: 41,935,141

WebSocket: available

8 of 12 probed RPC methods supported (batch, debug_traceCall, eth_getProof, eth_getBlockReceipts). The gaps are listed per chain in the method support matrix.

Status and latency from our health checks, refreshed about every 5 minutes. Uptime history. Method support probed automatically on 2026-10-04. Network status

Stable developer facts, measured

Block time:: ~705 ms (average of the last 1,000 blocks)
Finality:: the latest block is already reported as finalized
eth_getLogs range:: 10,000-block ranges accepted; the next size we test was refused
Historical state:: readable 64 blocks back, not 10,000

Measured 2026-10-04 through this page's endpoint, re-measured weekly. Limits can differ between the upstream nodes behind it. All chains: measured chain facts.

Stable Mainnet RPC URL (HTTP)

https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY

Stable WebSocket RPC URL

wss://rpc.swiftnodes.io/ws/stable?key=YOUR_API_KEY

Quick Start: Connect to Stable

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

ethers.js

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(
  "https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY"
);

const blockNumber = await provider.getBlockNumber();
console.log("Stable block:", blockNumber);

viem

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY"),
});

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY"))
print("Stable block:", w3.eth.block_number)

Add Stable to MetaMask

Network Name: Stable (SwiftNodes)

RPC URL: https://rpc.swiftnodes.io/rpc/stable?key=YOUR_API_KEY

Chain ID: 988

Currency Symbol: USDT0

WebSocket: wss://rpc.swiftnodes.io/ws/stable?key=YOUR_API_KEY

Features of SwiftNodes for Stable

Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
Health-checked every 2 minutes with automatic failover
Free tier available — no credit card or KYC required
Flat-rate monthly pricing with no per-request fees
HTTP and WebSocket support
One API key works across all 75+ supported chains, including Stable

Rate Limits

Plan	Price	HTTP req/s	WS msg/s
Free	$0/mo	2	1
Starter	$49/mo	50	25
Growth	$89/mo	150	75
Scale	$149/mo	300	150
Pro	$249/mo	500	250

Related EVM chains

Explore RPC endpoints for other EVM networks on SwiftNodes:

Kaia RPC Astar RPC WEMIX RPC Rootstock RPC Plasma RPC PulseChain RPC

Ready to start building on Stable? Connect your wallet and get a free API key in 30 seconds. No email or KYC required.