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 →

Strong 1 Solid coverage with minor gaps

Backpack WalletBackpack Wallet is a self-custodial multichain wallet for Solana, Ethereum, and Bitcoin, originally built a...57.0

Developing 10 Usable, with meaningful gaps to close

Figment Ethereum APIThe Ethereum API from Figment — 20 operation(s) for ethereum.50.5 Linea JSON-RPC APIStandard Ethereum JSON-RPC API plus Linea-specific extensions available at the public endpoint rpc.linea.bu...47.0 Parafi Ethereum APIEthereum network and sidecar metrics.46.4 Zircuit JSON-RPC APIStandard Ethereum JSON-RPC 2.0 interface to the Zircuit L2 network (HTTP and WebSocket) for reading chain s...45.1 Infura Web3 APIInfura's managed Web3 API surface — JSON-RPC 2.0 access to Ethereum and 40+ EVM networks (Base, Arbitrum, O...43.7 ETHGas APIETHGas v1 REST + WebSocket API for market data, order placement/management, funding (collateral deposits/wi...41.9 Routescan Geth/Parity Proxy APIEthereum JSON-RPC compatible proxy endpoints for standard methods including eth_blockNumber, eth_getBlockBy...41.9 PancakeSwap Exchange V2 Subgraph (Ethereum)GraphQL subgraph for querying PancakeSwap V2 exchange data on Ethereum mainnet, including swaps, liquidity ...41.4 PancakeSwap Exchange V3 Subgraph (Ethereum)GraphQL subgraph for querying PancakeSwap V3 concentrated liquidity exchange data on Ethereum mainnet, incl...41.4 ENS ResolverResolve an ENS name to an Ethereum address, or an address back to its ENS name. Look up an ENS name or an E...41.0

Thin 22 Limited public surface area

Flashbots Auction Relay (JSON-RPC)JSON-RPC endpoint for submitting bundles and private transactions to the Flashbots block builder. Supports ...38.5 Blast BridgeCanonical Ethereum-Blast bridge for ETH, USDB, and supported ERC-20 tokens. UI lives at bridge.blast.io and...37.6 Gallop Ethereum APIThe Ethereum API from Gallop — 28 operation(s) for ethereum.37.4 SuperRare Smart Contracts - Assets (ERC-721)SuperRare ERC-721 NFT asset contracts including shared minting contracts (SuperRareV1, SuperRareV2), creato...36.0 SuperRare Smart Contracts - The BazaarUnified marketplace and auction house smart contract on Ethereum that enables reserve-price auctions, sale ...36.0 ZKsync Era JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the ZKsync Era ZK rollup. Standard eth_* methods plus the ZKsync-s...35.5 Exactly Protocol Subgraph API (The Graph)GraphQL subgraph API powered by The Graph for querying indexed on-chain data from Exactly Protocol on Ether...35.4 Zora Network RPC APIJSON-RPC access to the Zora Network L2 chain (Chain ID 7777777), an OP Stack rollup on Ethereum. Compatible...35.3 HyperRPC JSON-RPC APIRead-only JSON-RPC endpoint optimised for data-intensive operations, providing up to 5x performance improve...33.9 EigenLayer Core ContractsSolidity smart contracts that implement the EigenLayer restaking protocol - StrategyManager, DelegationMana...33.5 Art Blocks GraphQL API (Hasura)Hasura-backed GraphQL API providing structured access to on-chain and off-chain Art Blocks data including p...33.0 Art Blocks MCP ServerModel Context Protocol server exposing 21 tools for AI agents to interact with the Art Blocks ecosystem acr...33.0 Art Blocks Subgraph — EthereumDecentralised subgraph on The Graph Network providing on-chain-only data for Art Blocks tokens, projects, a...33.0 Tenderly Node RPCProduction-grade JSON-RPC node infrastructure supporting 80+ EVM networks including Ethereum, Arbitrum, Opt...32.9 BNY Data On-ChainBNY Data On-Chain publishes BNY-attested data on-chain so on-chain consumers can read it directly from smar...32.4 Azimuth Layer 2 Roller HTTP RPC-APIThe HTTP RPC-API of Azimuth's Layer 2 naive rollup roller, primarily intended for interacting with Bridge. ...31.9 CyberConnect JavaScript SDKThe CyberConnect JavaScript SDK provides connect and disconnect (follow and unfollow) functions for writing...31.1 Self.ID Web APIRead and write DID identity records in browser environments. Exports WebClient and SelfID classes enabling ...29.7 XMTP App Chain RPC APIJSON-RPC API for the XMTP Layer-3 appchain built on Arbitrum and settling to Base. Used for smart contract ...29.7 Foundation Smart Contract APIEthereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Su...29.2 Push Chain EVM ClientPush Chain is 100% EVM-compatible; developers can initialize standard Ethers v6 or Viem clients against Pus...28.7 Morph JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API (eth_*, net_*, web3_*) plus Morph-specific methods such as morph_getBl...27.6

Emerging 19 Early or largely undocumented

Airstack GraphQL APIThe primary Airstack API offering composable GraphQL queries across on-chain and off-chain Web3 data. Query...26.1 Sei EVM JSON-RPC APIEthereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods f...25.1 Linea BridgeCanonical Ethereum-Linea bridge for ETH and supported ERC-20 tokens, built on Linea's message service. UI l...24.5 Aurora JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the Aurora EVM network of virtual chains on NEAR. Exposes the stan...23.5 Phantom EVM Provider APIEIP-1193 compliant Ethereum Provider API injected at window.ethereum and window.phantom.ethereum for Ethere...23.5 Phantom MCP ServerModel Context Protocol server (@phantom/mcp-server) that exposes 27 tools to AI agents across wallet operat...23.5 Phantom React SDKReact SDK (@phantom/react-sdk) for integrating Phantom across Solana and EVM chains with embedded wallet su...23.5 Notional Typescript SDKClient-side Typescript SDK for interacting with Notional Finance smart contracts. Provides helper methods f...22.8 Notional V2 Subgraph API (Mainnet)GraphQL subgraph API for querying Notional V2 on-chain data on Ethereum Mainnet via The Graph protocol. Pro...22.8 Notional V3 Subgraph API (Mainnet)GraphQL subgraph API for querying Notional V3 on-chain data on Ethereum Mainnet via The Graph Studio. Suppo...22.8 Manta Pacific (EVM JSON-RPC)EVM-compatible Ethereum JSON-RPC endpoint for the Manta Pacific Layer-2 rollup (chain ID 169, currency ETH)...21.8 Acala EVM+ JSON-RPCAcala EVM+ exposes a standard Ethereum JSON-RPC API through the EVM+ RPC Adapter, which wraps Substrate RPC...19.4 BNY Data On-ChainPublic, smart-contract-only product that broadcasts BNY-attested fund accounting data to public blockchains...19.1 Bitfinity EVM JSON-RPCStandard Ethereum JSON-RPC 2.0 interface to the Bitfinity EVM mainnet (Chain ID 355110). Supports the stand...18.5 Arbitrum One JSON-RPCPublic Ethereum-compatible JSON-RPC endpoint for Arbitrum One (chain id 42161 / 0xa4b1), the flagship Arbit...18.4 SpruceID Sign-In with Ethereum (SIWE) APISign-In with Ethereum (SIWE) enables Ethereum accounts to authenticate with off-chain services by signing a...18.4 Alchemix Smart Contract APIThe primary developer interface for Alchemix is its on-chain smart contracts deployed on Ethereum Mainnet, ...17.5 Ancient8 Mainnet JSON-RPCPublic Ethereum JSON-RPC interface for the Ancient8 Mainnet (chain ID 888888888, currency ETH), available o...17.0 Ancient8 Testnet JSON-RPC (Celestia)Public Ethereum JSON-RPC interface for the Ancient8 Celestia testnet (chain ID 28122024, currency ETH), ava...17.0

Score breakdown

Frequency

65.6

log-scaled weighted occurrences

Breadth

5.6

spread across providers

Quality lift

32.2

mean composite of providers using it

Cohesion

30.2

strength of nearest seed neighbor

Where this tag comes from

Provider tag189

Api tag52

Openapi tag2

Openapi op tag10

Cohort brief

Auto-generated

The 204 providers in the APIs.io catalog tagged Ethereum, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

204

all scored

Mean Kin Score

26.7

+6.0 vs catalog 20.7

Mean Agent Readiness

13.4

+3.7 vs catalog 9.7

Spread

1.9–66.6

median 27 · σ 14

How the 204 split by band

Exemplar 1Strong 2Developing 41Thin 60Emerging 64Minimal 36

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	31.4	17.9	+13.5	204
Contract Quality	26.7	17.5	+9.2	204
Discoverability	68.3	60.4	+7.9	204
Operational Transparency	17	11.3	+5.7	204
Contract Governance	6.6	6.4	+0.2	204
Access Clarity	20.7	22.3	-1.6	204

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

Artifact	This cohort	Catalog	Difference
MCP server (any)	19%	16%	+3
MCP server (first-party)	7%	7%	0
Agent Skills	0%	0%	0
OAuth scopes	0%	9%	-9
Security	96%	88%	+8
Arazzo workflows	1%	2%	-1
Governance rules	18%	13%	+5

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 Zerion 66.6
2 Chainstack 61.8
3 Backpack 57
4 Conduit 53.7
5 Kyber Network 53.3
6 Luno 52.8
7 Amazon Managed Blockchain 50.6
8 Figment 50.5
9 OpenZeppelin 50
10 Biconomy 49.5

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Ethereum

Providers using this tag (204)

APIs with this tag (52)