What is the Celo RPC URL?

The Celo Mainnet RPC URL with BoltRPC is https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo. Replace YOUR_API_KEY with your API key from dashboard.boltrpc.io. The chain ID is 42220.

How do I add Celo to MetaMask?

Open MetaMask, go to Settings, then Networks, then Add Network, and enter: Network Name: BoltRPC Celo, RPC URL: https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo, Chain ID: 42220, Currency Symbol: CELO, Block Explorer: https://celoscan.io.

Is Celo EVM compatible?

Yes. Celo runs the EVM and standard Ethereum tooling works out of the box. Since its migration to the OP Stack, Celo is an Ethereum Layer 2 with EVM equivalence. Only the RPC URL and Chain ID (42220) change.

Is Celo still a Layer 1?

No. Celo completed its migration from a standalone L1 to an Ethereum Layer 2 on the OP Stack in 2025. It kept its one-second block times and low fees, and now settles to Ethereum mainnet.

What gas token does Celo use?

CELO is the native gas token, but Celo's fee abstraction lets users pay transaction fees in whitelisted stablecoins such as cUSD.

Does BoltRPC provide Celo archive access?

Yes. BoltRPC serves Celo with full archive access: historical balances, contract state and transaction traces at any block since genesis.

Does BoltRPC support WebSocket for Celo?

Yes. BoltRPC provides WebSocket endpoints for Celo at wss://endpoints.boltrpc.io/ws/YOUR_API_KEY/celo. Use WebSocket for real-time streaming: new blocks, pending transactions, transfer events.

Celo RPC Endpoint

Celo runs stablecoin payments for real users on one-second blocks. Get a dedicated endpoint with full archive access and debug methods included.

chain id · 42220JSON-RPC 2.0WebSocketFull archiveDebug

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LIVE LATENCY

19ms

LIVE

gateway round-trip · sampled every second

IN PRODUCTION AT Chainlink

Your endpoint, ready in one line.

Drop this URL into your RPC client, HTTP library or wallet config. No SDK install required.

HTTPS

https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo

WEBSOCKET

wss://endpoints.boltrpc.io/ws/YOUR_API_KEY/celo

Replace YOUR_API_KEY with your API key. Get a free key →

Pick your stack.

Copy-paste examples for the libraries you already use. Swap the API key, hit run.

import { ethers } from "ethers";

const provider = new ethers.JsonRpcProvider(
  "https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo"
);

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

import { createPublicClient, http } from "viem";
import { celo } from "viem/chains";

const client = createPublicClient({
  chain: celo,
  transport: http("https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo"),
});

curl https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Connect your dApp, bot, or protocol to Celo Mainnet with BoltRPC. Celo is the payments-focused chain that migrated from standalone L1 to an Ethereum Layer 2, and predictable request-unit pricing keeps your RPC costs as boring as your users expect their payments to be.

Chain at a Glance


Chain ID	42220
Protocol	Optimistic rollup on the OP Stack (migrated from L1 in 2025)
Block time	~1 second
Gas token	CELO (fees also payable in stablecoins via fee abstraction)
Settlement	Ethereum mainnet
EVM compatible	Yes

What Celo is Built For

Celo is one of the few chains whose traffic is dominated by real-world payments rather than trading. Its ecosystem centers on stablecoins, cUSD, cEUR and bridged dollars, moving between mobile wallets, with fee abstraction that lets users pay gas in the stablecoin they are sending. In 2025 Celo completed its migration from a standalone L1 to an Ethereum Layer 2 on the OP Stack, keeping its one-second blocks and sub-cent fees while inheriting Ethereum settlement. For developers that means standard EVM tooling, ethers.js, viem, Foundry, Hardhat, against a chain where uptime directly affects whether someone’s remittance arrives. Payment backends poll balances and confirmations continuously, a workload where rate-limited public endpoints show up as support tickets.

Common Use Cases on Celo

Stablecoin payments and remittances Payment apps confirm transfers in near real time. Their backends poll eth_getTransactionReceipt and stream Transfer events continuously, sustained read traffic that scales with users, not with trading volume.

Deposit detection for wallets and merchants Merchant tools and custodial wallets watch addresses for incoming stablecoins. An eth_getLogs pipeline over one-second blocks needs a provider that sustains continuous read load without gaps.

Accounting, compliance and history Balance-at-date reports and transaction history exports are archive workloads. Full archive access on the standard endpoint means no second provider for historical queries.

DeFi on payment rails Lending and FX between Celo stablecoins run the classic DeFi read pattern: continuous eth_call polling against rates and positions, with WebSocket streams for liquidations.

Built for teams that ship on Celo.

Full archive access included

BoltRPC serves Celo with full historical state, measured live against our own nodes. Query any balance or contract state at any block, transaction history features, accounting exports and compliance reporting work without a separate archive provider.

Built for payment backends

Wallets and payment processors confirm transfers by polling receipts and balances on every user action. One-second blocks make that a high-frequency workload; a dedicated endpoint keeps confirmation latency flat when your user count grows.

Debug methods included

debug_* methods are available on Celo for tracing failed transactions and inspecting execution, useful when a stablecoin transfer with fee abstraction behaves unexpectedly.

WebSocket streaming included

Subscribe to new blocks and transfer events over WebSocket at no extra charge. Payment services credit deposits the moment they land instead of discovering them a polling interval later.

L2 migration handled for you

Celo's move to the OP Stack changed the node software under every RPC provider. BoltRPC's operator tracks upgrades and hard forks for every supported chain, so your integration survives network transitions without code changes.

Full JSON-RPC coverage.

Every standard Celo method you would expect. Archive-only methods are available on request for qualifying plans.

STANDARD5

eth_calleth_getLogseth_sendRawTransactioneth_getTransactionReceipteth_getBalance

ARCHIVEON REQUEST3

eth_getBalanceeth_calldebug_traceTransaction

Celo, explained.

Common questions about connecting to Celo over BoltRPC.

Ask a question →Read the docs

: The Celo Mainnet RPC URL with BoltRPC is https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo. Replace YOUR_API_KEY with your API key from dashboard.boltrpc.io. The chain ID is 42220.
: Open MetaMask, go to Settings, then Networks, then Add Network, and enter: Network Name: BoltRPC Celo, RPC URL: https://endpoints.boltrpc.io/rpc/YOUR_API_KEY/celo, Chain ID: 42220, Currency Symbol: CELO, Block Explorer: https://celoscan.io.
: Yes. Celo runs the EVM and standard Ethereum tooling, ethers.js, viem, Foundry, Hardhat, MetaMask, works out of the box. Since its migration to the OP Stack, Celo is an Ethereum Layer 2 with EVM equivalence. Only the RPC URL and Chain ID (42220) change.
: No. Celo completed its migration from a standalone L1 to an Ethereum Layer 2 on the OP Stack in 2025. It kept its one-second block times and low fees, and now settles to Ethereum mainnet.
: CELO is the native gas token, but Celo's fee abstraction lets users pay transaction fees in whitelisted stablecoins such as cUSD, a user sending dollars does not need to hold a separate gas token.
: Yes. BoltRPC serves Celo with full archive access: historical balances, contract state and transaction traces at any block since genesis. Archive depth is measured live against our own infrastructure.
: Yes. BoltRPC provides WebSocket endpoints for Celo at wss://endpoints.boltrpc.io/ws/YOUR_API_KEY/celo. Use WebSocket when you need real-time streaming: new blocks, pending transactions, transfer events.

Ship on Celo this week.

An API key in under 60 seconds, Celo plus 34 other chains, and a team that answers when you write.

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