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Optimism Subblocks
Read preconfirmed OP Mainnet state with Subblocks, formerly Flashblocks. Use pending-tag RPC calls to update swaps, balances, and transaction status before the full block is sealed.
Preconfirmations via standard RPC
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Read OP Mainnet data, simulate swaps, and send transactions with reliable, high-performance Optimism RPC infrastructure.
Connect to OP Mainnet or OP Sepolia through one geo-balanced endpoint. Read contract state, follow events, and submit transactions through the nearest available region.
Build responsive Optimism apps with preconfirmed state, archive data, and predictable RPC capacity.
Read preconfirmed OP Mainnet state with Subblocks, formerly Flashblocks. Use pending-tag RPC calls to update swaps, balances, and transaction status before the full block is sealed.
Faites évoluer vos charges de travail RPC à haut volume tout en bénéficiant de performances constantes, d'un nombre illimité de requêtes au sein de votre niveau « RPS » et de coûts mensuels prévisibles.
Query historical contract state and backfill OP Mainnet events for indexers, DeFi analytics, and accounting. Access archive data through your Optimism RPC endpoint.
Inspect execution with debug_traceTransaction and call traces. Diagnose reverted swaps, follow internal calls, and debug Solidity contracts.
Read liquidity-pool state, simulate swaps with eth_call, and submit signed transactions. Connect trading bots and DeFi frontends with familiar EVM tools.
Explore Optimism tooling
Backfill contract events with eth_getLogs and retrieve historical state through archive RPC. Build portfolio analytics, activity feeds, and indexers.
Explore Optimism methods
Read ETH and token balances, estimate gas, and track receipts. Connect wallets and payment backends to OP Mainnet or OP Sepolia.
Get an Optimism RPC endpoint
Read preconfirmed state with pending-tag JSON-RPC calls on Subblocks-enabled endpoints. Update swap quotes and wallet activity before the full block is sealed.
Explore Optimism preconfirmations
Trace transaction execution and diagnose reverted calls. Use Optimism debug APIs with Hardhat, Foundry, viem, or ethers.js to investigate application issues.
Explore debug and trace APIsGive production applications their own Optimism RPC infrastructure. Dedicated Nodes reserve compute and storage for your workload, with Chainstack managing node deployment and maintenance.
Choose OP Mainnet or OP Sepolia and a node mode to estimate monthly infrastructure costs.
Customer feedback from teams building wallets, trading systems, and security tools across supported networks.
ChainstackSon infrastructure robuste a considérablement renforcé notre capacité à sécuriser efficacement les environnements Web3.Chainstack a joué un rôle essentiel dans l'amélioration des fonctionnalités multi-chaînes et de l'expérience utilisateur (UX) de Brave Wallet.Le modèle de forfait « Unlimited » d'Node nous offre une prévisibilité des coûts, et ses performances sont d'une fiabilité à toute épreuve.Nous sommes passés de plusieurs incidents par semaine à zéro incident.Notre collaboration avec Chainstack nous a permis de réduire nos coûts d'infrastructure de plus de 70 %, tout en relevant des défis complexes en matière de sécurité Web3.
Read preconfirmed OP Mainnet state through standard JSON-RPC calls. Update swap quotes, balances, and transaction status before the full block is sealed, without changing your EVM tooling.
Get an Optimism endpointRun OP Mainnet or OP Sepolia on infrastructure you control. Deploy OP-Reth and OP-Node with monitoring, automated updates, and self-healing operations through Chainstack Self-Hosted.
Get free Ethereum Sepolia ETH from the Chainstack faucet, then bridge it to OP Sepolia. Use your Optimism Sepolia RPC endpoint to deploy contracts, simulate swaps, and test wallet or DeFi integrations before production.
The faucet tops up eligible wallets to 0.5 Sepolia ETH every 24 hours. Keep some ETH on Ethereum Sepolia for bridge fees. Follow the bridge guide to fund OP Sepolia; the faucet itself credits Ethereum Sepolia.
Read an ETH balance with eth_getBalance. Use the same JSON-RPC request on OP Mainnet or OP Sepolia.
Consulter le guide d'installationhttps://optimism-mainnet.core.chainstack.com/YOUR_ENDPOINT_IDwss://optimism-mainnet.core.chainstack.com/YOUR_ENDPOINT_IDCreate an Optimism node on your chosen network. Copy your HTTPS URL from Accès et identifiants et remplacer YOUR_ENDPOINT_ID dans l'exemple.
curl --request POST \
--url https://optimism-mainnet.core.chainstack.com/YOUR_ENDPOINT_ID \
--header 'Content-Type: application/json' \
--data '{
"jsonrpc": "2.0",
"id": 1,
"method": "eth_getBalance",
"params": [
"0x38545c4b331D8BFb3bee94C62D77a6735b5eF8c0",
"latest"
]
}'Le result correspond au solde en ETH exprimé en wei sous forme hexadécimale. Un ETH équivaut à 10^18 wei. This read does not send a transaction or spend gas.
Consulter la référence des méthodes (s'ouvre dans un nouvel onglet)
Free developer access and paid plans for Optimism applications, onchain services, and enterprise teams.
Comprend :
Toutes les fonctionnalités destinées aux développeurs, ainsi que :
Les modules complémentaires et l'infrastructure dédiée d'Node sont facturés séparément.
Une assistance exceptionnelle pour toutes les formules payantesÉconomisez plus de 50 % sur notre formule haut de gamme « Pay-as-you-go »
Discuter sur Telegram (s'ouvre dans un nouvel onglet)Explore Optimism RPC providers, endpoint setup, and production infrastructure guides.
Connect OP Mainnet and OP Sepolia to your application.
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Compare endpoints, archive data, pricing, and developer tools.
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Compare L2 infrastructure for production applications.
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Connect trading strategies to managed RPC infrastructure.
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Optimism RPC lets applications read OP Mainnet blockchain data and submit signed transactions using Ethereum-compatible JSON-RPC. Use it to read balances, call smart contracts, retrieve logs, and track transaction receipts. Chainstack supports OP Mainnet and OP Sepolia. See the Optimism API reference.
Create a free Chainstack account, create a project, and deploy an Optimism Global Node on mainnet or Sepolia. Copy your HTTPS or WebSocket URL from Access and credentials. The Developer plan includes 3 million request units per month, up to 25 requests per second, and one node. No credit card is required.
A Chainstack OP Mainnet HTTPS endpoint follows https://optimism-mainnet.core.chainstack.com/YOUR_ENDPOINT_ID. OP Sepolia uses https://optimism-sepolia.core.chainstack.com/YOUR_ENDPOINT_ID. Copy the complete authenticated URL from your node and replace the example endpoint ID. See Optimism tooling.
OP Mainnet uses chain ID 10 (0xa). OP Sepolia uses 11155420 (0xaa37dc). Both use ETH for gas; OP is the governance token, not the gas currency. See the official Optimism network information.
Yes. Optimism supports Ethereum-compatible tooling, including MetaMask, ethers.js, viem, web3.py, Hardhat, and Foundry. Use your authenticated HTTPS URL for requests and the corresponding wss:// URL for subscriptions such as new blocks and contract logs. Follow the Optimism tooling guide.
Appeler eth_getBalance with an EVM address and a block tag such as latest. The result is a hexadecimal ETH balance in wei, with 10^18 wei per ETH. Token balances require a contract call rather than eth_getBalance. Voir le Optimism eth_getBalance reference.
Optimism Subblocks, formerly Flashblocks, expose preconfirmed state through standard JSON-RPC methods using the pending block tag on compatible endpoints. Applications can read execution updates before the full block is sealed. Preconfirmation is not Ethereum settlement or finality. See the Optimism Subblocks documentation et Chainstack’s pending-state guide.
Yes. Chainstack supports archive access for OP Mainnet and OP Sepolia. Use it to query historical balances, contract storage, and past state for analytics and backfills. Archive access is available from the Growth plan, and archive requests consume 2 request units. See supported networks and modes and request-unit rules.
Yes. Deploy an Optimism Global Node with debug and trace APIs enabled to inspect execution using methods such as debug_traceTransaction. Use traces to diagnose reverted swaps, investigate internal calls, and debug smart contracts. Check the Optimism debug and trace requirements.
No. OP Mainnet, Base, and other OP Stack chains have separate chain IDs, state, and RPC endpoints. An Optimism endpoint accesses its selected Optimism network; it does not automatically provide Base or another Superchain network’s data. See the supported Chainstack networks.
Yes. Chainstack Self-Hosted supports OP Mainnet and OP Sepolia using OP-Reth and OP-Node. Deploy on infrastructure you control with monitoring, automated updates, and self-healing operations. The OP Stack setup also requires Ethereum L1 RPC and Beacon API endpoints. Check supported deployments and the installation guide.
Start with the free Developer plan. Paid plans start at $40 per month with annual billing. Unlimited Node adds predictable flat-fee capacity from the Growth plan. Dedicated Nodes start from Pro, with infrastructure billed separately. Compare plan features and current Optimism Dedicated Node configurations.
Connect to OP Mainnet at https://optimism-mainnet.core.chainstack.com/YOUR_ENDPOINT_ID or OP Sepolia at https://optimism-sepolia.core.chainstack.com/YOUR_ENDPOINT_ID. Copy your authenticated URL from Accès et identifiants. OP Mainnet uses chain ID 10, and OP Sepolia uses 11155420. Both use ETH for gas. See the Optimism tooling guide.
Utilisation eth_getBalance pour les soldes en ETH, eth_call pour les lectures de contrats, eth_getLogs pour les événements, et eth_sendRawTransaction for signed transaction submission. Connect over WebSocket for block and log subscriptions. Optimism Subblocks, formerly Flashblocks, expose preconfirmed state through pending-tag calls on compatible endpoints before a full block is sealed. Use the block tag appropriate to your application’s finality requirements. See the Optimism API reference et preconfirmed-state guide.
