established · 0.8 marketcapability domainschema

JSON-RPC

Score 26.3 / 100 59 providers +65 via APIs 164 APIs Search apis.io →

Providers using this tag (59)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Strong 1 Solid coverage with minor gaps
CelestiaBlockchainData AvailabilityWeb3Infrastructure10 APIs63.9
Developing 11 Usable, with meaningful gaps to close
KusamaCompanyCryptoBlockchainWeb31 API48.5LineaBlockchainEthereumLayer 2zkEVM1 API48.0MozSEOSearchMarketingAnalytics3 APIs46.8Gunzilla GamesCompanyGamingBlockchainWeb32 APIs44.7ZircuitCompanyCryptoBlockchainLayer 21 API43.3Mysten LabsCompanyBlockchainWeb3Sui3 APIs42.9GRITHAI AgentsA2AMCPAgent Identity3 APIs42.7OptimismLayer 2EthereumOP StackSuperchain1 API42.2ThunderCoreCompanyCryptoBlockchainEVM4 APIs40.7ConsensysCompanyInfrastructureBlockchainEthereum1 API40.6InfStonesCompanyBlockchainNode InfrastructureStaking1 API39.6
Thin 29 Limited public surface area
昆仑瑶池 (Kunlun Yaochi)CompanyAI AgentsAgent RegistryA2A3 APIs39.0TendermintCompanyInfrastructureBlockchainConsensus1 API38.8BetfairBetting ExchangeSports BettingWageringTrading1 API38.2NervosCompanyCrypto Web3BlockchainLayer 11 API37.8StarkwareCompanyBlockchainEthereumLayer 24 APIs37.7Matter LabsCompanyBlockchainEthereumLayer 21 API36.4ArbitrumLayer 2EthereumRollup1 API35.2MycelnetA2AAI AgentsMulti-Agent SystemsCollective Intelligence2 APIs34.8FlashbotsMEVEthereumBlockchain1 API34.6MobilecoinCompanyCryptocurrencyPaymentsBlockchain1 API34.1MonadBlockchainLayer 1EVMHigh Performance1 API33.9MezoCompanyCrypto Web3BlockchainBitcoin2 APIs33.7KiteAgentic PaymentsAI Agentsx402Stablecoins3 APIs33.2Sky MavisCompanyBlockchainWeb3Gaming3 APIs33.1StarknetLayer 2EthereumValidity RollupZK1 API31.9MoneroCryptocurrencyPrivacyBlockchain2 APIs31.5CeloCompanyBlockchainEthereum L2Web31 API30.4ScrollzkEVMLayer 2EthereumRollup1 API30.1ComethCompanyBlockchainAccount AbstractionERC-43373 APIs30.0BaseLayer 2EthereumOP StackSuperchain1 API29.2Mantle NetworkLayer 2EthereumRollupEigenDA8 APIs29.0EthereumBlockchainDeFiEthereum1 API28.9LitecoinCryptocurrencyBlockchainLitecoinLTC3 APIs27.8Demox LabsCompanyBlockchainZero KnowledgeCryptocurrency1 API27.3Skale LabsCompanyBlockchainWeb3Smart Contracts1 API26.9ZeroDevAccount AbstractionSmart WalletsERC-4337EIP-77021 API26.8Model Context Protocol (MCP)MCPAI AgentsToolsResources17 APIs26.7BerachainBlockchainLayer 1EVMProof of Liquidity10 APIs26.6=nil; FoundationCompanyZk InfrastructureBlockchainLayer 21 API26.4
Emerging 16 Early or largely undocumented
AuroraCompanyBlockchainEVMWeb31 API26.1Quai NetworkCompanyLayer 1BlockchainCryptocurrency1 API25.2AI City Social TownAI AgentsA2AVirtual PetsAI Companion1 API24.55ireBlockchainLayer 1Smart ContractsEVM3 APIs23.3Alpen LabsCompanyCryptoBitcoinBlockchain1 API23.3Offchain LabsCompanyBlockchainEthereumLayer 23 APIs22.6Sorella LabsCompanyCrypto InfrastructureDeFiDecentralized Exchange1 API21.9Manta NetworkCompanyLayer 2BlockchainEthereum2 APIs20.8AcalaCompanyCryptoBlockchainDeFi1 API19.1HamsaCompanyFinancial ServicesBlockchainPayments19.1InfinitySwapCompanyDeFiBlockchainEthereum1 API18.4Ronin NetworkSidechainEthereumGamingNFT11 APIs18.0FastLaneCompanyCrypto Web3BlockchainMEV17.9Ancient8CompanyCryptoBlockchainEthereum2 APIs17.1Arch NetworkCompanyCrypto Web3BitcoinBlockchain17.0CypheriumCompanyCryptoBlockchainLayer 12 APIs12.9
Minimal 2 Almost no public developer surface
BitcoinCompanyCryptoCryptocurrencyBlockchain10.4NevaA2AAI AgentsAgent ServicesSoftware Development1 API10.1

APIs with this tag (163)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready
Qlik Engine APIJSON-RPC WebSocket API for interacting with the Qlik Associative Engine, creating and manipulating apps, an...72.0
Strong 13 Solid coverage with minor gaps
SignalWire Calling API (JSON-RPC)An OpenRPC 1.3.2 contract for real-time control of live calls over RELAY — 8 methods (calling.dial, calling...65.4Trustly Europe APIJSON-RPC 1.1 API for Trustly Pay by Bank in Europe and the UK. Methods cover Deposit, Withdraw/AccountPayou...65.4Celestia Node Admin APIJSON-RPC methods in the node module of celestia-node. Provides administrative introspection over the runnin...63.9Celestia Node Blob APIJSON-RPC methods in the blob module of celestia-node. Submit blobs to one or more namespaces with blob.Subm...63.9Celestia Node Blobstream APIJSON-RPC methods in the blobstream module of celestia-node. Generates inclusion proofs against Blobstream d...63.9Celestia Node DA APIJSON-RPC methods in the da module of celestia-node implementing the modular Data Availability interface use...63.9Celestia Node DAS APIJSON-RPC methods in the das module of celestia-node. Operational introspection over the Data Availability S...63.9Celestia Node Fraud APIJSON-RPC methods in the fraud module of celestia-node. Exposes fraud proof retrieval and subscription for t...63.9Celestia Node Header APIJSON-RPC methods in the header module of celestia-node. Query ExtendedHeaders with header.LocalHead, header...63.9Celestia Node Share APIJSON-RPC methods in the share module of celestia-node. Provides direct access to Celestia's share-level dat...63.9Celestia Node State APIJSON-RPC methods in the state module of celestia-node. Exposes state-level operations including account bal...63.9Nutshell Legacy JSON-RPC APINutshell's original JSON-RPC API, available since 2010. Nutshell states it is no longer adding new endpoint...60.6MERCURY Web Fetch A2A AgentAgent-to-Agent (A2A 0.3.0) surface for "MERCURY Web Fetch", published as a conformant agent card at https:/...58.0
Developing 25 Usable, with meaningful gaps to close
Codashop and Coda Webstore Fulfillment APIThe publisher-implemented JSON-RPC fulfillment contract Coda calls to deliver purchases made on Codashop an...53.60G Chain JSON-RPCEthereum-compatible JSON-RPC endpoint for the 0G Chain mainnet ("Aristotle", chain ID 16661), an AI-focused...48.7Kusama JSON-RPC APIThe public Substrate JSON-RPC 2.0 interface to the Kusama relay chain. Probed live on 2026-07-19: 130 metho...48.5SharpSpring Open APIThe SharpSpring (Constant Contact Lead Gen & CRM) Open API — a single HTTPS POST endpoint that accepts a JS...48.4Linea JSON-RPC APIStandard Ethereum JSON-RPC API plus Linea-specific extensions available at the public endpoint rpc.linea.bu...48.0Linea Sepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Linea Sepolia testnet (chain ID 59141), used for application development, ...48.0Qlik Engine JSON-RPC APIThe JSON-RPC API over WebSocket that enables interaction with the Qlik Associative Engine for Qlik Sense ap...46.4Uzum BaaS Payment HubBanking-as-a-Service JSON-RPC 2.0 API that lets partners embed payments, transfers and account and card ope...46.2Aurelius Agent A2A APIAgent-to-Agent (A2A 0.3.0) JSON-RPC surface for Aurelius Agent, WunderCorp's strategic planning and orchest...44.8Blockdaemon RPC APIProduction-ready shared and dedicated JSON-RPC and REST node endpoints across 50+ protocols including Bitco...44.8GUNZ Chain JSON-RPC APIThe public Ethereum-compatible JSON-RPC endpoint for the GUNZ L1 chain, an Avalanche subnet running Subnet-...44.7Deribit WebSocket APIJSON-RPC over WebSocket interface for real-time bidirectional communication with the Deribit exchange. Reco...43.9Zircuit JSON-RPC APIStandard Ethereum JSON-RPC 2.0 interface to the Zircuit L2 network (HTTP and WebSocket) for reading chain s...43.3Sui JSON-RPC APIThe Sui full-node JSON-RPC API (OpenRPC 1.2.6) for reading objects, coins, balances, events, checkpoints, d...42.9GRITH Gate A2A AgentThe A2A 1.0 JSON-RPC bridge at https://grithgate.com/api/a2a (also on grithland.com and grithhold.com), des...42.7OP Mainnet JSON-RPCPublic Ethereum JSON-RPC endpoint for OP Mainnet (chain ID 10). Supports standard eth_* methods plus Optimi...42.2OP Sepolia JSON-RPCPublic Ethereum JSON-RPC endpoint for the OP Sepolia testnet (chain ID 11155420) used for development and i...42.2Optimism JSON-RPC APIStandard Ethereum JSON-RPC method invocation.42.2Name Whisper A2A AgentThe agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint at https://namewhisper.ai/a2a whose ag...41.4ThunderCore Mainnet JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the ThunderCore mainnet (chain ID 108, TT gas token). Supports the...40.7ThunderCore Testnet JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the ThunderCore testnet (chain ID 18, TST gas token), with a fauce...40.7Infura Web3 APIInfura's managed Web3 API surface — JSON-RPC 2.0 access to Ethereum and 40+ EVM networks (Base, Arbitrum, O...40.6zkSync Era Mainnet JSON-RPCJSON-RPC endpoint for zkSync Era mainnet (chain ID 324). Implements standard eth_* methods plus zks_* exten...40.6zkSync Era Sepolia JSON-RPCJSON-RPC endpoint for the zkSync Era Sepolia testnet (chain ID 300) used for development, contract deployme...40.6NetApp Element APIAPI for NetApp Element software and NetApp HCI storage management.39.7
Thin 104 Limited public surface area
Routescan Geth/Parity Proxy APIEthereum JSON-RPC compatible proxy endpoints for standard methods including eth_blockNumber, eth_getBlockBy...39.2Kunlun Yaochi A2A JSON-RPC APIThe agent-to-agent surface named in the company's A2A agent card: a JSON-RPC 2.0 endpoint exposing 16 metho...39.0Finn-tannlege A2A AgentThe agent-to-agent surface: an anonymous A2A JSON-RPC 2.0 endpoint at https://finn-tannlege.com/a2a impleme...38.4CKB JSON-RPC APIPublic JSON-RPC 2.0 interface to Nervos CKB nodes for querying chain state (blocks, transactions, cells), s...37.8SINCOR Agent Swarm A2A APIA2A 1.0.1 agent surface over JSON-RPC 2.0 exposing sixteen skills. Discover via the agent card, quote a ski...37.4Qlik Sense Engine JSON APIWebSocket protocol API using JSON-RPC for interacting with the Qlik Associative Engine.37.3A2A402 Agent Work Router (A2A)The Agent2Agent JSON-RPC 2.0 endpoint declared by the agent card: message/send returns a stateless A2A Mess...37.1Vana L1 JSON-RPCStandard Ethereum JSON-RPC for the EVM-compatible Vana L1 blockchain, which records registrations, grants, ...36.9HyperEVM JSON-RPCEVM-compatible JSON-RPC endpoint exposed by Hyperliquid for deploying and interacting with smart contracts ...36.8Syndica ChainStream APIChainStream is Syndica's real-time Solana data streaming API. It consolidates updates from multiple validat...36.4Syndica Solana RPC (HTTP) APIHigh-performance Solana JSON-RPC HTTP endpoints served from a fault-tolerant elastic-node architecture acro...36.4ZKsync Era JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the ZKsync Era ZK rollup. Standard eth_* methods plus the ZKsync-s...36.4Hegic Smart Contracts (Arbitrum)Hegic's core options protocol is implemented as smart contracts on Arbitrum One. Developers can interact di...36.2Uniblock JSON-RPC APIThe Uniblock JSON-RPC API provides a single endpoint for standard JSON-RPC calls across hundreds of blockch...35.3Arbitrum JSON-RPC APIEthereum-compatible JSON-RPC 2.0 endpoint35.2Arbitrum Nova JSON-RPCPublic Ethereum JSON-RPC endpoint for Arbitrum Nova (chain ID 42170), an AnyTrust chain with a Data Availab...35.2Arbitrum One JSON-RPCPublic Ethereum JSON-RPC endpoint for Arbitrum One mainnet (chain ID 42161), the flagship optimistic rollup...35.2Arbitrum Sepolia JSON-RPCPublic Ethereum JSON-RPC endpoint for the Arbitrum Sepolia testnet (chain ID 421614).35.2Direct Hire A2A Meta-AgentDirect Hire's A2A v1.0 discovery agent, published at /.well-known/agent-card.json with a JSON-RPC interface...34.8Mycelnet A2A AgentMycelnet's agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint at https://mycelnet.ai/a2a desc...34.8QuickNode Core RPC APIMulti-chain JSON-RPC, REST, and gRPC endpoints across 77+ blockchains (Ethereum, Solana, Polygon, Arbitrum,...34.8XMTP App Chain RPC APIJSON-RPC API for the XMTP Layer-3 appchain built on Arbitrum and settling to Base. Used for smart contract ...34.7Flashbots Auction Relay (JSON-RPC)JSON-RPC endpoint for submitting bundles and private transactions to the Flashbots block builder. Supports ...34.6Flashbots Auction Relay (Sepolia Testnet)Sepolia testnet instance of the Flashbots Auction JSON-RPC relay for bundle submission and testing without ...34.6Flashbots Protect RPCPublic-facing Ethereum JSON-RPC endpoint that routes transactions through Flashbots' private mempool to pro...34.6HyperRPC JSON-RPC APIRead-only JSON-RPC endpoint optimised for data-intensive operations, providing up to 5x performance improve...34.4MobileCoin Full-Service Wallet APIJSON-RPC 2.0 wallet backend for the MobileCoin network - manage accounts and addresses, build and submit tr...34.1Monad JSON-RPC APIFull JSON-RPC method reference — standard Ethereum eth_*, net_*, web3_*, debug_*, and trace_* methods plus ...33.9Monad Mainnet JSON-RPCPublic Ethereum-compatible JSON-RPC endpoint for Monad mainnet (chain ID 143, native token MON). Hosted on ...33.9Monad Testnet JSON-RPCPublic JSON-RPC endpoint for the Monad public testnet, used for application development, integration testin...33.9Mezo Chain EVM JSON-RPCEVM-compatible Ethereum JSON-RPC interface to the Mezo chain (eth_* methods) for reading chain state and su...33.7Blast JSON-RPC APIEthereum-compatible JSON-RPC methods exposed by the Blast node.33.5Blast Mainnet JSON-RPCPublic Ethereum-compatible JSON-RPC endpoint for Blast mainnet (chain ID 81457). Supports the standard eth_...33.5Blast Sepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Blast Sepolia testnet (chain ID 168587773), used for application developme...33.5A2APark A2A AgentThe Park's agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint whose single method, message/se...33.3Flipside Crypto JSON-RPC APIThe JSON-RPC API from Flipside Crypto — 1 operation(s) for json-rpc.33.3Kite Chain JSON-RPC (Mainnet)EVM-compatible JSON-RPC interface for Kite Chain mainnet (chain ID 2366, native token KITE), available over...33.2Kite Chain JSON-RPC (Testnet)EVM-compatible JSON-RPC interface for Kite Chain testnet (chain ID 2368), paired with a public faucet and t...33.2Ronin JSON-RPC APIEthereum-compatible JSON-RPC endpoint for the Ronin network — read chain state, submit transactions, call c...33.1The Root Network Node RPCPublic archive-node RPC for The Root Network mainnet, exposing both the Substrate JSON-RPC surface (author,...32.9Azimuth Layer 2 Roller HTTP RPC-APIThe HTTP RPC-API of Azimuth's Layer 2 naive rollup roller, primarily intended for interacting with Bridge. ...32.8Helius Digital Asset Standard (DAS) APISolana JSON-RPC API for unified asset queries (compressed NFTs, regular NFTs, tokens) including getAsset, g...32.0Helius Photon RPC (ZK Compression)Indexed RPC for Solana ZK compression (compressed accounts).32.0Helius SenderParallel transaction routing through Helius and Jito for inclusion latency optimization.32.0Helius Solana RPCSolana JSON-RPC and WebSocket endpoints with enhanced WebSockets, archival data, and staked connections.32.0Juno Full NodeGo implementation of a Starknet full node from Nethermind that serves the Starknet JSON-RPC and acts as a s...31.9Pathfinder Full NodeRust implementation of a Starknet full node from Equilibrium that serves the Starknet JSON-RPC, syncs from ...31.9Starknet JSON-RPC SpecificationVersioned JSON-RPC specification implemented by Starknet full nodes (Pathfinder, Juno, Papyrus) and infrast...31.9Starknet Mainnet RPC (Public Providers)Starknet Mainnet (chain ID SN_MAIN) is reached via the Starknet JSON-RPC at hosted providers — Infura, Alch...31.9Starknet Sepolia RPC (Public Providers)Public JSON-RPC endpoint for Starknet Sepolia testnet (chain ID SN_SEPOLIA) for development and integration...31.9Tenderly Node RPCProduction-grade JSON-RPC node infrastructure supporting 80+ EVM networks including Ethereum, Arbitrum, Opt...31.7Monero JSON-RPC APIJSON-RPC 2.0 dispatch endpoint31.5Zora Network RPC APIJSON-RPC access to the Zora Network L2 chain (Chain ID 7777777), an OP Stack rollup on Ethereum. Compatible...31.4Filecoin Calibration Testnet Glif APIGlif-hosted public Lotus node endpoint for the Filecoin Calibration testnet. Provides the same read-only JS...31.3Filecoin Glif Lotus JSON-RPC APIPublic, load-balanced Lotus node endpoint hosted by Glif providing read-only access to the Filecoin mainnet...31.3XRPL JSON-RPC API (Mainnet)JSON-RPC interface to the XRP Ledger mainnet for querying accounts, transactions, ledgers, order books, AMM...31.3XRPL JSON-RPC API (Testnet)JSON-RPC interface to the XRP Ledger Altnet testnet for development and testing. Supports the same method s...31.3Reown Blockchain APIMulti-chain JSON-RPC over HTTPS used by AppKit and partners; provides on-chain reads, gas, swaps, and onram...31.0Sui JSON-RPC API (Deprecated)The legacy JSON-RPC API for interacting with Sui full nodes, providing methods for querying objects, transa...30.8EOSIO Nodeos History APIThe history_api_plugin exposes endpoints under /v1/history for retrieving historical actions, transactions,...30.3EOSIO Nodeos Net APIThe net_api_plugin exposes endpoints under /v1/net for inspecting and managing peer-to-peer connections of ...30.3EOSIO Nodeos Producer APIThe producer_api_plugin exposes endpoints under /v1/producer for controlling block production on a node, in...30.3Alchemy Bundler API (ERC-4337)JSON-RPC bundler endpoints for ERC-4337 user operations (eth_sendUserOperation, eth_estimateUserOperationGa...30.1Alchemy Node API (JSON-RPC)Multi-chain JSON-RPC over HTTPS and WebSockets covering standard eth_*, solana, and other chain methods, pl...30.1Alchemy Simulation APIREST/JSON-RPC API for simulating transactions and asset changes before broadcasting.30.1Scroll JSON-RPC (Mainnet)Standard Ethereum JSON-RPC interface for Scroll mainnet (chain ID 534352). Used by wallets, dApps, indexers...30.1Scroll JSON-RPC (Sepolia Testnet)Standard Ethereum JSON-RPC endpoint for Scroll Sepolia testnet (chain ID 534351), used for development, int...30.1Scroll JSON-RPC APIEthereum JSON-RPC over HTTP POST30.1Cometh Connect Bundler APIERC-4337 bundler JSON-RPC endpoint. Accepts User Operations into the mempool, estimates UserOp gas, returns...30.0Cometh Connect Paymaster APIERC-4337 paymaster JSON-RPC endpoint for transaction sponsorship (pm_sponsorUserOperation, pm_supportedEntr...30.0Infura JSON-RPC APIMulti-chain JSON-RPC over HTTPS and WebSockets across 23+ networks (Ethereum, Linea, Polygon, Arbitrum, Opt...29.7Infura Solana JSON-RPCSolana JSON-RPC and WebSocket endpoints.29.7Glama MCP GatewayReverse-proxy MCP gateway that fronts hosted, remote, and custom MCP servers under a per-user endpoint of t...29.6Base Flashblocks RPCPre-confirmation JSON-RPC endpoint exposing Flashblocks — sub-block streams of ordered transactions that al...29.2Base JSON-RPC APIEthereum JSON-RPC 2.0 endpoint29.2Base Mainnet JSON-RPCStandard Ethereum JSON-RPC endpoint for Base Mainnet (chain ID 8453). Supports eth_*, net_*, web3_*, and Op...29.2Base Sepolia JSON-RPCPublic JSON-RPC endpoint for the Base Sepolia testnet (chain ID 84532) used for development, contract deplo...29.2X402 AI 自助门店 A2A AgentThe store's agent-to-agent surface: an anonymous A2A 0.3 JSON-RPC endpoint the agent card points at, where ...29.2Mantle JSON-RPC (Mainnet)Standard Ethereum JSON-RPC endpoint for Mantle mainnet (chain ID 5000). Used by wallets, dApps, indexers, a...29.0Mantle JSON-RPC (Sepolia Testnet)Standard Ethereum JSON-RPC endpoint for the Mantle Sepolia testnet, used for development, contract deployme...29.0Mantle WebSocket (Mainnet)WebSocket endpoint for real-time JSON-RPC subscriptions on Mantle mainnet - new blocks, new pending transac...29.0Tatum RPC GatewayJSON-RPC over HTTPS to 130+ blockchain networks (Ethereum, Bitcoin, Solana, Polygon, BNB, Avalanche, Algora...29.0Push Chain EVM ClientPush Chain is 100% EVM-compatible; developers can initialize standard Ethers v6 or Viem clients against Pus...28.4Morph JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API (eth_*, net_*, web3_*) plus Morph-specific methods such as morph_getBl...28.3Zcash JSON-RPC API (zcashd)The primary JSON-RPC interface exposed by zcashd, the original Zcash full node. Backwards compatible with B...28.2Zcash Payment API (z_ methods)The Zcash-specific extension to the JSON-RPC interface that enables shielded (private) transaction operatio...28.2Zebra JSON-RPC APIThe JSON-RPC API provided by zebrad, the Zcash Foundation's independent Zcash full node implementation writ...28.2Sei EVM JSON-RPC APIEthereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods f...28.0Privy Wallets RPCJSON-RPC method passthrough for signing transactions and arbitrary RPC calls against Privy-managed wallets.27.9Litecoin JSON-RPC APILitecoin Core JSON-RPC 2.0 interface. All methods are accessed via a single POST endpoint using the method ...27.8p0stman MCP ServerLive, anonymous, remote Model Context Protocol server at https://p0stman.com/api/mcp (JSON-RPC 2.0 over HTT...27.7Zero A2A Agentp0stman's agent-to-agent surface: an A2A agent card for "Zero" served at /.well-known/agent-card.json (and ...27.7Perkoon Agent Data Layer (A2A)Perkoon's agent-to-agent surface: an A2A agent card served at /.well-known/agent-card.json and the legacy /...27.5Aleo RPC APIFree public JSON-RPC 2.0 API for reading the Aleo zero-knowledge blockchain — latest blocks and heights, tr...27.31inch Web3 RPC APIHosted JSON-RPC endpoints for 14+ EVM and non-EVM networks, exposed through the 1inch API key for unified r...27.0SKALE JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API served by SKALE Chains (per-chain RPC/WSS endpoints), plus SKALE Progr...26.9Graph Node Admin JSON-RPC (self-hosted)JSON-RPC admin interface to a self-hosted Graph Node for deploying, listing, and managing subgraphs. Public...26.8ZeroDev JSON-RPC APIThe JSON-RPC API from ZeroDev — 1 operation(s) for json-rpc.26.8MCP SpecificationThe authoritative protocol definition for the Model Context Protocol, maintained at modelcontextprotocol.io...26.7Berachain Bepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Bepolia testnet (chain ID 80069), used for application development and int...26.6Berachain Mainnet JSON-RPCPublic Ethereum-compatible JSON-RPC endpoint for Berachain mainnet (chain ID 80094). Supports the standard ...26.6=nil; JSON-RPC APIEthereum-style JSON-RPC 2.0 API exposing the =nil; cluster — blocks, transactions (messages), accounts, con...26.4Odoo External APIOdoo's external API for integrating with the platform using JSON-RPC and XML-RPC protocols for accessing al...26.4Odoo JSON-RPC APIJSON-RPC transport for the same operations26.4
Emerging 18 Early or largely undocumented
Aurora JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the Aurora EVM network of virtual chains on NEAR. Exposes the stan...26.1allagents Operator (A2A Agent)The directory as an A2A agent. POST a JSON-RPC 2.0 message/send stating a need ("I need a translation agent...25.5AI City Social Town A2A APISingle JSON-RPC 2.0 endpoint (POST https://aicity.jiademin2688.top/a2a) through which external agents join ...24.55ireChain Mainnet JSON-RPCEthereum-compatible JSON-RPC 2.0 endpoint for the 5ireChain mainnet (EIP-155 chain ID 995, native currency ...23.35ireChain Thunder Testnet JSON-RPCEthereum-compatible JSON-RPC 2.0 endpoint for the 5ireChain Thunder testnet (EIP-155 chain ID 997, native c...23.3Manta Atlantic (Substrate JSON-RPC)Substrate/Polkadot parachain JSON-RPC endpoint (WebSocket) for Manta Atlantic (Polkadot Para ID 2104, nativ...20.8Manta Pacific (EVM JSON-RPC)EVM-compatible Ethereum JSON-RPC endpoint for the Manta Pacific Layer-2 rollup (chain ID 169, currency ETH)...20.8Dash Platform DAPI (Decentralized API)Decentralized HTTP API exposing gRPC and JSON-RPC endpoints for both Dash Core layer 1 and Dash Platform la...20.7Lit Network Node JSON-RPC (SDK-mediated)Threshold-cryptography network of Lit nodes accessed via the Lit JS SDK for signing, encryption, decryption...20.7Acala EVM+ JSON-RPCAcala EVM+ exposes a standard Ethereum JSON-RPC API through the EVM+ RPC Adapter, which wraps Substrate RPC...19.1Bitfinity EVM JSON-RPCStandard Ethereum JSON-RPC 2.0 interface to the Bitfinity EVM mainnet (Chain ID 355110). Supports the stand...18.4Jake Gaylor A2A AgentA2A agent representing Jake Gaylor, discovered at /.well-known/agent-card.json on ai.jakegaylor.com (and as...18.4Ronin JSON-RPC (Mainnet)Standard Ethereum-style JSON-RPC endpoint for Ronin mainnet (chain ID 2020). Used by wallets, games, dApps,...18.0Ronin JSON-RPC (Saigon Testnet)JSON-RPC endpoint for the Saigon testnet (chain ID 2021), used for development, integration testing, and dA...18.0Goldsky Edge RPCHigh-performance JSON-RPC service for EVM networks with advanced debugging and tracing methods. Used as a d...17.4Ancient8 Mainnet JSON-RPCPublic Ethereum JSON-RPC interface for the Ancient8 Mainnet (chain ID 888888888, currency ETH), available o...17.1Ancient8 Testnet JSON-RPC (Celestia)Public Ethereum JSON-RPC interface for the Ancient8 Celestia testnet (chain ID 28122024, currency ETH), ava...17.1Cypherium JSON-RPC APIEthereum-compatible JSON-RPC node API for the Cypherium Layer-1 mainnet — eth, web3, net, personal, miner, ...12.9
Minimal 2 Almost no public developer surface
Neva A2A AgentNeva's agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint at the root of neva.dt-agent.co.uk ...10.1Parallel Finance JSON-RPC (polkadot.js)Substrate/Polkadot JSON-RPC interface to the Parallel Finance parachain, accessed over WebSocket with the p...6.7

Companies reaching this through an API (65)

These companies publish an API, specification or operation carrying “JSON-RPC” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

0G Labs 1inch A2A402 A2APark Alchemy allagents Blast Blockdaemon Chainstack Coda Payments Dash Deribit Direct Hire Envio EOSIO Filecoin Finn-tannlege Flipside Crypto Futureverse Glama Goldsky Hegic Helius Hyperliquid Infura Jake Gaylor Lit Protocol MERCURY Morph NameWhisper NetApp Nutshell Odoo p0stman Parallel Finance Perkoon Privy Push Protocol Qlik Qlik Sense Qlik Sense Enterprise QuickNode Reown Routescan (Snowtrace) Sei SharpSpring SignalWire SINCOR Sui Syndica
Show all 65 companies ↓
Tatum Tenderly The Graph Trustly Group Uniblock Urbit Uzum Vana WunderCorp X402 AI 自助门店 XMTP XRP Ledger Zcash zkSync Zora

Score breakdown

Frequency
63.3
log-scaled weighted occurrences
Breadth
1.5
spread across providers
Quality lift
38.0
mean composite of providers using it
Cohesion
16.8
strength of nearest seed neighbor

Related tags

EVM 36 co-occurrences Layer 2 22 co-occurrences Ethereum 43 co-occurrences Smart Contracts 30 co-occurrences Web3 65 co-occurrences RPC 16 co-occurrences

Where this tag comes from

Api tag164
Provider tag59
Openapi tag11
Openapi op tag11

Cohort brief

Auto-generated

The 59 providers in the APIs.io catalog tagged JSON-RPC, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
59
all scored
Mean Kin Score
30.9
+8.0 vs catalog 22.9
Mean Agent Readiness
14.6
+2.7 vs catalog 11.9
Spread
10.1–63.9
median 30.1 · σ 10.3
How the 59 split by band
Exemplar 0Strong 1Developing 11Thin 29Emerging 16Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 48.2 23.2 +25 59
Operational Transparency 26.3 13.7 +12.6 59
Discoverability 70.6 58.1 +12.5 59
Contract Quality 22 17.6 +4.4 59
Contract Governance 10 6.3 +3.7 59
Access Clarity 20.5 26.5 -6 59

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 17% 14% +3
MCP server (first-party) 17% 12% +5
Agent Skills 0% 0% 0
OAuth scopes 3% 11% -8
Security 100% 98% +2
Arazzo workflows 0% 2% -2
Governance rules 17% 14% +3

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Celestia 63.9
  2. 2 Kusama 48.5
  3. 3 Linea 48
  4. 4 Moz 46.8
  5. 5 Gunzilla Games 44.7
  6. 6 Zircuit 43.3
  7. 7 Mysten Labs 42.9
  8. 8 GRITH 42.7
  9. 9 Optimism 42.2
  10. 10 ThunderCore 40.7
Top by Agent Readiness
  1. 1 Flashbots 49.6
  2. 2 Mysten Labs 48.6
  3. 3 Moz 34.9
  4. 4 Nervos 34.9
  5. 5 Celestia 31.7
  6. 6 Mycelnet 30.9
  7. 7 Tendermint 29.8
  8. 8 Gunzilla Games 29.3
  9. 9 Kusama 26.5
  10. 10 Optimism 23.4
All 59 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 5 October 2026, across 29093 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/json-rpc"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/json-rpc"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/json-rpc/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.