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Supported Chains: K-R (3/3)

Supported chains K-R on the Web3 API platform. See the full chain list for every network.

Part 3 of 3: 1 · 2 · 3

NEAR​


tip

Available for Premium users only.

NEAR API is available on Web3 API platform.

NEAR is a user-friendly and carbon-neutral blockchain, built from the ground up to be performant, secure, and infinitely scalable.

In technical terms, NEAR is a layer one, sharded, proof-of-stake blockchain built with usability in mind.

Official quick links: Website, Docs, GitHub

Networks​

  • Mainnet (HTTPS)

API methods​

For Near, we support blockchain interaction via all the applicable methods except for those listed as unsupported.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

sandbox_patch_state, status, network_info

API querying​

Request example​

curl -X POST https://rpc.ankr.com/near/{your_token} \
-H "content-type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": "dontcare",
  "method": "query",
  "params": {
    "request_type": "view_access_key",
    "finality": "final",
    "account_id": "client.chainlink.testnet",
    "public_key": "ed25519:H9k5eiU4xXS3M4z8HzKJSLaZdqGdGwBG49o7orNC4eZW"
  }
}'

Response example​

{
  "jsonrpc": "2.0",
  "result": {
    "nonce": 85,
    "permission": {
      "FunctionCall": {
        "allowance": "18501534631167209000000000",
        "receiver_id": "client.chainlink.testnet",
        "method_names": ["get_token_price"]
      }
    },
    "block_height": 19884918,
    "block_hash": "GGJQ8yjmo7aEoj8ZpAhGehnq9BSWFx4xswHYzDwwAP2n"
  },
  "id": "dontcare"
}

Nervos CKB​


tip

Available for Freemium and Premium users.

Nervos CKB API is available on Web3 API platform.

Nervos CKB (Common Knowledge Base) is the Layer 1, proof-of-work blockchain of the Nervos ecosystem, using an improved Nakamoto consensus and the generalized UTXO Cell model. It is designed to maximize decentralization while remaining minimal, flexible, and secure.

warning

The Nervos EVM / Polyjuice (Godwoken) Layer 2 endpoint has been deprecated and removed following the sunset of the Godwoken network by Nervos (June 2025). Only the native Nervos CKB (Layer 1) endpoint is available.

Official quick links: Website, CKB Docs, JSON-RPC reference, GitHub

Networks​

  • Mainnet:
    • Nervos CKB API (HTTPS and WSS) — https://rpc.ankr.com/nervos_ckb/{your_token}

API methods​

For Nervos CKB, see the supported methods. Node administration, mining, network-control and debug_* methods are restricted on the shared endpoint; contact Sales (sales@ankr.com) for Enterprise access.

Neura​


Neura API is available on Web3 API platform.

Neura is a high-performance, EVM-compatible Layer 1 blockchain purpose-built for real-time decentralized applications across DeFi and AI-driven systems. Built on the enterprise-grade Hyperledger Besu client and powered by the QBFT consensus mechanism, Neura delivers immediate transaction finality, fork resistance, and low-latency block production — making it ideal for applications that demand speed, consistency, and trust.

Official quick links: Docs

Networks​

  • Testnet (HTTPS and WSS)

API methods​

For Neura, we support blockchain interaction via all the applicable methods except for those listed as unsupported.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

HTTPS:

eth_newFilter, eth_getFilterChanges, eth_coinbase, eth_hashrate, eth_mining, eth_getWork,eth_submitWork, eth_submitHashrate, net_peerCount, eth_newBlockFilter, eth_newPendingTransactionFilter, eth_uninstallFilter, eth_getFilterLogs,

debug_* (exception: debug_traceBlockByHash, debug_traceBlockByNumber, debug_traceTransaction, debug_traceCall, debug_traceBlock),

personal_*, admin_*, clique_*, les_*, miner_*, engine_*, parity_*

WSS:

txpool_content, txpool_inspect, txpool_status, txpool_contentFrom

API querying​

Request example​

curl -X POST https://rpc.ankr.com/neura_testnet \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc":"2.0",
      "method":"eth_blockNumber",
      "params": [],
      "id":1
    }'

Response example​

{
  "jsonrpc":"2.0",
  "id":1,
  "result":"0xdb42a"
}

Optimism​


tip

Available for Freemium and Premium users.

Optimism API is available on Web3 API platform.

Optimism is a fast, stable, and scalable L2 blockchain built by Ethereum developers, for Ethereum developers. Built as a minimal extension to existing Ethereum software, Optimism’s EVM-equivalent architecture scales your Ethereum apps without surprises. If it works on Ethereum, it works on Optimism at a fraction of the cost.

With the OVM 2.0 upgrade, which happened on November 11th, 2021, the Optimism protocol went through its biggest upgrade to date. The primary focus of this upgrade was EVM Equivalence, a new design for Optimism that brought it close to 1:1 parity with Ethereum.

Official quick links: Website, Docs, GitHub

Networks​

  • Mainnet (HTTPS and WSS)
  • Testnet:
    • Sepolia (HTTPS and WSS)

Add networks to MetaMask​

Using Ankr as the blockchain provider for MetaMask makes user interaction on Web3 not just easy and slick but also PRIVATE. We DON'T collect users' blockchain addresses — end of the story. Feel free to check our terms and privacy policy to be sure.

For MetaMask to interact with Optimism through Ankr's infrastructure, add a required Optimism network either via Web3 API platform's or MetaMask's UI.

Via Web3 API platform​

To be added soon.

Via MetaMask​

To add Optimism Mainnet, follow these steps:

  1. In MetaMask extension, click Networks (drop-down menu) > Add network to open Settings.

  2. In the Add a network pane, click Add a network manually, then enter the network details and click Save:

    • Network name: Optimism Mainnet by Ankr RPC.
    • New RPC URL: https://rpc.ankr.com/optimism/{your_token}.
    • Chain ID: 10.
    • Currency symbol: ETH.
    • Block explorer URL: https://optimistic.etherscan.io/.

Congrats — you've just added Ankr as the blockchain provider for MetaMask to interact with Optimism Mainnet.

API methods​

For Optimism, we support blockchain interaction via all the applicable methods except for those listed as unsupported.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

HTTPS:

eth_newFilter, eth_getFilterChanges, eth_coinbase, eth_hashrate, eth_mining, eth_getWork,eth_submitWork, eth_submitHashrate, net_peerCount, eth_newBlockFilter, eth_newPendingTransactionFilter, eth_uninstallFilter, eth_getFilterLogs,

debug_* (exception: debug_traceBlockByHash, debug_traceBlockByNumber, debug_traceTransaction, debug_traceCall, debug_traceBlock),

personal_*, admin_*, clique_*, les_*, miner_*, engine_*, parity_*

WSS:

txpool_content, txpool_inspect, txpool_status, txpool_contentFrom

API querying​

Request example​

curl -X POST https://rpc.ankr.com/optimism/{your_token} \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc":"2.0",
      "method":"eth_blockNumber",
      "params": [],
      "id":1
    }'

Response example​

{
  "jsonrpc":"2.0",
  "id":1,
  "result":"0x249c491"
}

Polkadot​


tip

Available for Premium users only.

Polkadot API is available on Web3 API platform.

Polkadot is the first fully-sharded blockchain.

Polkadot enables scalability by allowing specialized blockchains to communicate with each other in a secure, trust-free environment.

Polkadot is built to connect and secure unique blockchains, whether they be public, permissionless networks, private consortium chains, or other Web3 technologies. It enables an internet where independent blockchains can exchange information under common security guarantees.

Official quick links: Website, Docs, GitHub

Networks​

  • Mainnet (HTTPS and WSS)

API methods​

For Polkadot, we support blockchain interaction via all the applicable methods except for those listed as unsupported.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

state_getMetadata, state_getPairs, state_traceBlock, state_trieMigrationStatus, state_subscribeStorage, state_unsubscribeStorage, state_queryStorage, sync_state_genSyncSpec, system_accountNextIndex, system_addLogFilter, system_addReservedPeer, system_health, system_localListenAddresses, system_localPeerId, system_name, system_nodeRoles, system_peers, system_properties, system_removeReservedPeer, system_reservedPeers, system_resetLogFilter, system_syncState, system_unstable_networkState, system_version,

account_*, babe_*, mmr_*, dev_*, offchain_*, author_*

API querying​

Request example​

curl -X POST https://rpc.ankr.com/polkadot/{your_token} \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "id": 1,
      "method": "chain_getBlock",
      "params": []
}'

Response example​

{
    "jsonrpc": "2.0",
    "result": {
        "block": {
            "header": {
                "parentHash": "0xe121a7c43cbe19eab2601d422df9173a84553cda9f0cd59e0656227696f46d30",
                "number": "0xedaaed",
                "stateRoot": "0x4f4dd4f1bc408dfd01222a8d1401a96c9abb8be86ab60c0e01f10b4a54834b6f",
                "extrinsicsRoot": "0xf310b41030a9bbf5788176a0a187a7fe84833729fb763883329bcc2f9a308a03",
                "digest": {
                    "logs": [
                        "0x0642414245b50103fc000000f4aebb1000000000440c17d240df02d42ddab5c961fe2649e30f69aea189e5bc95487ae5f889a74bc516a159ccc7db48e5253dae8f1168be0c66597b18ab1e2248ecd3862eae9e0a8c74b856d20d6916ab8cbe3cd4955f183c231bde98ca24dbb3f201468cc23b0f",
                        "0x054241424501015a6148654f94084ca0373a6d708704ce54ae704e159d51eb00d7de032b2b3824a91a4509f94f90fda82a3ff372b0003c0440475b9218e6469d883eeba276ac8a"
                    ]
                }
            },
            "extrinsics": [
                "0x280403000bc076d42e8801",
                "0xdd02040c00ecaaed009c98002408011220c9b7d94c0c8dc84ca9034c1a6926bfb2e0b1e31c0c9fbaee8126874d32d122840878742f6970342f3134312e39382e3231392e3139392f7463702f33303333336c682f6970342f3130302e36342e332e31322f7463702f333033333379190000f600000029010000903755c7655994b2ca1f457d26c947041f9e6970e6b3cf578ee8459d061cc20d3d7e65d5c166fcca21059ad60b89d21f8a2b5574da4414adb72941c0c2e44d8c"
            ]
        },
        "justifications": null
    },
    "id": 1
}

Polygon​


Polygon API is available on Web3 API platform.

Polygon is a scaling solution for public blockchains. Polygon PoS supports all the existing Ethereum tooling along with faster and cheaper transactions.

Official quick links: Website, Docs, GitHub

Networks​

  • Mainnet (HTTPS and WSS)
  • Amoy Testnet (HTTPS and WSS)

Add networks to MetaMask​

Using Ankr as the blockchain provider for MetaMask makes user interaction on Web3 not just easy and slick but also PRIVATE. We DON'T collect users' blockchain addresses — end of the story. Feel free to check our terms and privacy policy to be sure.

For MetaMask to interact with Polygon through Ankr's infrastructure, add a required Polygon network either via Web3 API platform's or MetaMask's UI.

Via Web3 API platform​

To be added soon.

Via MetaMask​

To add Polygon Mainnet, follow these steps:

  1. In MetaMask extension, click Networks (drop-down menu) > Add network to open Settings.

  2. In the Add a network pane, click Add a network manually, then enter the network details and click Save:

    • Network name: Polygon Mainnet by Ankr RPC.
    • New RPC URL: https://rpc.ankr.com/polygon/.
    • Chain ID: 137.
    • Currency symbol: MATIC.
    • Block explorer URL: https://polygonscan.com/.

Congrats — you've just added Ankr as the blockchain provider for MetaMask to interact with Polygon Mainnet.

To add Polygon Amoy Testnet, follow these steps:

  1. In MetaMask extension, click Networks (drop-down menu) > Add network to open Settings.

  2. In the Add a network pane, click Add a network manually, then enter the network details and click Save:

    • Network name: Polygon Amoy Testnet by Ankr RPC.
    • New RPC URL: https://rpc.ankr.com/polygon_amoy/.
    • Chain ID: 80002.
    • Currency symbol: MATIC.
    • Block explorer URL: https://www.oklink.com/amoy/.

Congrats — you've just added Ankr as the blockchain provider for MetaMask to interact with Polygon Amoy Testnet.

API methods​

For Polygon, we support blockchain interaction via all the applicable methods except for those listed as unsupported.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

HTTPS:

eth_newFilter, eth_getFilterChanges, eth_coinbase, eth_hashrate, eth_mining, eth_getWork,eth_submitWork, eth_submitHashrate, net_peerCount, eth_newBlockFilter, eth_newPendingTransactionFilter, eth_uninstallFilter, eth_getFilterLogs,

debug_* (exception: debug_traceBlockByHash, debug_traceBlockByNumber, debug_traceTransaction, debug_traceCall, debug_traceBlock),

personal_*, admin_*, clique_*, les_*, miner_*, engine_*, parity_*

WSS:

txpool_content, txpool_inspect, txpool_status, txpool_contentFrom

API querying​

Request example​

curl -X POST https://rpc.ankr.com/polygon \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc":"2.0",
      "method":"eth_blockNumber",
      "params": [],
      "id":1
    }'

Response example​

{
  "jsonrpc":"2.0",
  "id":1,
  "result":"0x21fbd0f"
}

Rollux​


Rollux API is available on Web3 API platform.

Rollux is a suite of rollup-based Layer 2 solutions designed to enable EVM users with near-instant low-cost transfers, executions, and contract deployments. Rollux utilizes Syscoin's Layer 1 for best-of-breed secure decentralized settlement and Syscoin PoDA for Layer 1 data availability, offering more efficiency, lower costs, and higher throughput than other L1 DA alternatives.

As a suite, Rollux is set to encompass both Optimistic and ZK (zero-knowledge) based approaches, enabling users and projects to choose a network or solution that fits them best.

Official quick links: Website, Docs, GitHub

Networks​

  • Mainnet (HTTPS and WSS)
  • Op-node Mainnet (HTTPS)
  • Testnet (HTTPS and WSS)
  • Op-node Testnet (HTTPS)

API methods​

For Rollux, we support blockchain interaction via all the applicable EVM methods except for those listed as unsupported.

For Rollux Op-node, we support blockchain interaction via the applicable Op-node methods.

Unsupported​

warning

This section contains a list of methods we don't support for Premium service plan.

tip

If you require any of the methods from the list, contact our Sales (sales@ankr.com) about moving to the Enterprise service plan that can provide the services tailored to your specific needs.

HTTPS:

eth_newFilter, eth_getFilterChanges, eth_coinbase, eth_hashrate, eth_mining, eth_getWork,eth_submitWork, eth_submitHashrate, net_peerCount, eth_newBlockFilter, eth_newPendingTransactionFilter, eth_uninstallFilter, eth_getFilterLogs,

debug_* (exception: debug_traceBlockByHash, debug_traceBlockByNumber, debug_traceTransaction, debug_traceCall, debug_traceBlock),

personal_*, admin_*, clique_*, les_*, miner_*, engine_*, parity_*

WSS:

txpool_content, txpool_inspect, txpool_status, txpool_contentFrom

API querying​

Request example​

curl -X POST https://rpc.ankr.com/rollux \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_blockNumber",
      "params": [],
      "id": 1
    }'

Response example​

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x16bef5"
}