established · -0.2 capabilitymarket resourcedomain

Smart Contracts

Score 27.0 / 100 129 providers +35 via APIs 65 APIs Search apis.io →

Providers using this tag (129)

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

Strong 4 Solid coverage with minor gaps
Solidus LabsCompanyComplianceRegTechTrade Surveillance5 APIs65.5OpenZeppelinWeb3BlockchainSecurity1 API60.2AptosBlockchainWeb3MoveLayer 11 API57.8Block LottosCompanyLotteryBlockchainWeb32 APIs55.5
Developing 26 Usable, with meaningful gaps to close
0xCryptocurrencyDeFiDEX AggregatorSwap2 APIs53.9AeternityBlockchainLayer 1Cryptocurrency4 APIs53.3Moirai LabsCompanyBlockchainWeb32 APIs49.5LineaBlockchainEthereumLayer 2zkEVM1 API48.0Digital AssetBlockchainTokenizationDigital AssetsFinancial Services6 APIs47.7StellarBlockchainCryptocurrencyDecentralized ExchangeLedger4 APIs47.6AlgorandBlockchainCryptocurrencyProof of StakeDeFi3 APIs47.5SIMBA ChainCompanyBlockchainSupply ChainTraceability2 APIs47.5SupraBlockchainLayer 1OracleWeb32 APIs46.4Horizon Blockchain GamesCompanyConsumerBlockchainWeb37 APIs46.0OumlaCompanyBlockchainDigital AssetsWallet Infrastructure1 API45.5Agent ZeroAgentsAgent IntelligenceERC-8004x4022 APIs44.1BitbondCompanyTokenizationBlockchainDigital Assets2 APIs43.8AelfCompanyBlockchainLayer 1Web32 APIs43.7FortaCompanySecurityBlockchainWeb31 API43.2Mysten LabsCompanyBlockchainWeb3Sui3 APIs42.9BasescanBlockchainBaseL2Explorer1 API42.7EnsoCompanyCrypto Web3DeFiBlockchain1 API42.2BscScanBlockchainBlock ExplorerBNB Smart ChainBSC1 API41.3TransposeBlockchainNFTCryptocurrencyWeb31 API41.3AleoCompanyBlockchainZero KnowledgeCryptography1 API41.1Gala GamesCompanyBlockchainWeb3Gaming8 APIs41.0Seismic SystemsCompanyBlockchainPrivacyEncryption1 API40.7HederaHederaDistributed LedgerBlockchainDLT1 API40.6WarpPay402 Studiox402MicropaymentsAI AgentsMCP2 APIs40.5API3BlockchainOracleDecentralizedData Feed1 API39.7
Thin 28 Limited public surface area
Routescan (Snowtrace)BlockchainExplorerAvalancheEVM1 API39.2PolygonScanBlockchainPolygonExplorerWeb31 API39.1CardanoCardanoBlockchainCryptocurrencyProof of Stake1 API38.9NervosCompanyCrypto Web3BlockchainLayer 11 API37.8TezosTezosBlockchainTzKTBaking Bad1 API36.6Dapper LabsCompanyCryptoBlockchainWeb31 API35.7BlocktorchCompanyWeb3ObservabilityMonitoring1 API35.4EnvioBlockchainIndexerGraphQLWeb33 APIs34.4ImmunefiCompanySecurityBug BountyVulnerability Disclosure1 API34.1GluwaCompanyBlockchainCryptocurrencyStablecoins1 API33.7thirdwebWeb3BlockchainWallets1 API33.4Limit BreakCompanyGamingBlockchain32.3Thought MachineCompanyBankingCore BankingFinancial Services2 APIs32.2ManifoldNFTCreator ToolsBlockchain1 API32.0TenderlyWeb3BlockchainEthereum6 APIs31.7ParaSwapDeFiDEX AggregatorToken SwapsBlockchain1 API31.0CertoraCompanySecurityFormal Verification30.8SuiBlockchainMoveWeb3Cryptocurrency1 API30.8Art BlocksGenerative ArtNFTOn-Chain ArtBlockchain3 APIs30.6CeloCompanyBlockchainEthereum L2Web31 API30.4OpynDeFiOptionsEthereumSqueeth3 APIs30.0FlowBlockchainNFTGamesDeFi1 API29.1EthereumBlockchainDeFiEthereumJSON-RPC1 API28.9AngleCompanyStablecoinsDecentralized FinanceBlockchain2 APIs28.8LidoLiquid StakingEthereumStakingDeFi7 APIs27.7ChainlensAnalyticsBlockchainBlock ExplorerCryptocurrencies1 API27.1Skale LabsCompanyBlockchainWeb31 API26.9=nil; FoundationCompanyZk InfrastructureBlockchainLayer 21 API26.4
Emerging 45 Early or largely undocumented
AuroraCompanyBlockchainEVMWeb31 API26.1CoralCompanyCrypto Web3Solana25.7Mina ProtocolCompanyCrypto Web3BlockchainZero-Knowledge Proofs2 APIs25.5Quai NetworkCompanyLayer 1BlockchainCryptocurrency1 API25.2RedStoneCompanyInfrastructureBlockchainOracle2 APIs24.95ireBlockchainLayer 1EVM3 APIs23.3Alpen LabsCompanyCryptoBitcoinBlockchain1 API23.3Offchain LabsCompanyBlockchainEthereumLayer 23 APIs22.6AztecCompanyBlockchainPrivacyZero Knowledge22.5HyperledgerBlockchainDistributed LedgerEnterpriseLinux Foundation1 API22.4HalbornCompanySecurityCybersecurityBlockchain21.6DFINITYCompanyBlockchainInternet ComputerICP1 API21.3SuperfluidCompanyCrypto Web3BlockchainDeFi1 API21.3Offchain Labs (Arbitrum)CompanyCryptoBlockchainEthereum20.7ElementCompanyDeFiDecentralized FinanceFixed Income20.0AgoricCompanyBlockchainJavaScript19.9Cozy FinanceCompanyDeFiRisk Management19.7ReflexerCompanyCryptoDeFiStablecoins1 API19.4AcalaCompanyCryptoBlockchainDeFi1 API19.1Rocket PoolBlockchainEthereumLiquid StakingProof of Stake2 APIs18.7BlockVisionCompanyBlockchainWeb3Data Infrastructure1 API18.6Lens ProtocolLens ProtocolOnchain SocialWeb3Social Graph6 APIs18.6InfinitySwapCompanyDeFiBlockchainEthereum1 API18.4Quant NetworkBlockchainDistributed LedgerInteroperabilityOverledger1 API18.3Lithium FinanceCompanyCryptoDeFiOracle17.8CartesiBlockchainLayer 2Optimistic RollupsEthereum17.4InfinifiCompanyDeFiStablecoinsYield17.3MainframeCompanyDeFiBlockchainWeb31 API17.3Arch NetworkCompanyCrypto Web3BitcoinBlockchain17.0My AICompanyRewardsLoyaltyWeb31 API16.8Code4renaCompanySecurityWeb316.6Forte LabsCompanyBlockchainWeb3Compliance16.6InstadappCompanyCryptoDeFiBlockchain16.6Term FinanceCompanyDeFiLendingFixed Rate16.5ZamaCompanyCrypto Web3CryptographyFully Homomorphic Encryption16.1IthacaCompanyCrypto InfrastructureEthereumAuthentication16.0MoolaCompanyDeFiLendingBorrowing14.5Enosys MarketsCompanyDeFiBlockchainDecentralized Exchange13.8Exa FinanceCompanyBlockchainWeb3NFT13.5Silo FinanceCompanyDeFiLendingMoney Markets13.5FhenixCompanyCrypto Web3BlockchainFully Homomorphic Encryption13.1PartyDAOCompanyWeb3BlockchainEthereum12.4BrevisCompanyZk CoprocessorZero-Knowledge ProofszkVM12.0Bright Moments DAOCompanyNFTDAOGenerative Art11.6AmpCompanyCryptoBlockchainEthereum11.3
Minimal 26 Almost no public developer surface
BlurNFTNFT MarketplaceNFT AggregatorNFT Lending10.5MakerDAOCompanyCrypto DefiDeFiStablecoins10.1Saffron FinanceCompanyCrypto Web3DeFiYield9.8SovrynCompanyDeFiBitcoinBlockchain9.8Anchor ProtocolCompanyCryptoDeFiBlockchain9.7Sound.xyzCompanyMusicWeb3Blockchain9.7Keep NetworkCompanyBlockchainCryptocurrencyBitcoin9.5HourglassCompanyDeFiBlockchainEthereum9.3AerodromeCompanyDeFiDEXAMM8.4AmpleforthCompanyCryptoDeFiBlockchain7.8SturdyCompanyCryptoDeFiLending7.8Teller FinanceCompanyFintechDeFiLending7.3ether.fiEthereumLiquid RestakingLiquid StakingRestaking6.7YoloRektCompanyCryptoDeFiPrediction Markets6.4Alpha FinanceCompanyCrypto Web3DeFiBlockchain6.1QuantstampCompanyEnterpriseBlockchainSecurity6.1Sec3CompanyCrypto Web3SecurityBlockchain5.8Yield ProtocolCompanyCrypto DefiDeFiEthereum5.1Potion LabsCompanyDeFiOptions3.9AdjointCompanyFinancial ServicesTreasuryDistributed Ledger2.5ComputableCompanyCryptoBlockchainEthereum0.0Dharma LabsCompanyDeFiCryptocurrencyEthereum0.0Fei ProtocolCompanyDeFiStablecoinsEthereum0.0FimioCompanyDeveloper ToolsWeb3Fraud Prevention0.0KadenaCompanyCrypto Web3Blockchain2 APIs0.0LevelCompanyStablecoinsDeFiCryptocurrency0.0

APIs with this tag (61)

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 4 Solid coverage with minor gaps
Fireblocks Tokenization APIDeploy, mint, burn, and manage tokens across the chains supported by Fireblocks Tokenization Engine. Covers...64.5OpenZeppelin Contracts API ReferenceThe OpenZeppelin Contracts library provides a comprehensive collection of modular, reusable, and secure Sol...60.2OpenZeppelin Monitor APIOpenZeppelin Monitor is an open-source blockchain monitoring service that watches for specific on-chain act...60.2Altimate AI SMART_CONTRACTS APIThe SMART_CONTRACTS API from Altimate AI — 1 operation(s) for smart_contracts.55.4
Developing 5 Usable, with meaningful gaps to close
Moirai Agents API (A2A + MCP)A2A 1.0 agent ("A2A-compatible analytics and contract intelligence agent", version 0.1.0) with 11 skills — ...49.5Stellar RPC APIThe Stellar RPC API (formerly Soroban RPC) is a JSON-RPC interface for interacting with Soroban smart contr...47.6SIMBA Blocks Platform Service (Dynamic Contract API)The SIMBA Build dynamic API generator. When a smart contract is deployed into an application, Blocks auto-g...47.5Bitbond Token Tool APIProgrammatic token and smart-contract deployment API for Token Tool. Enables minting, burning, transferring...43.8Hexagate (Chainalysis)Web3 security product (acquired by Chainalysis) that monitors smart contracts and on-chain activity in real...41.8
Thin 33 Limited public surface area
Routescan Etherscan-Compatible Contract APIAccess verified smart contract ABIs, source code, and creation transaction data. Supports contract source c...39.2Routescan Etherscan-Compatible Logs APIQuery event logs emitted by smart contracts using filter parameters including address, block range, and up ...39.2HyperEVM JSON-RPCEVM-compatible JSON-RPC endpoint exposed by Hyperliquid for deploying and interacting with smart contracts ...36.8TzKT Big Maps APIThe Big Maps API indexes all Tezos big map allocations across smart contracts, exposing individual key-valu...36.6TzKT Contracts APIThe Contracts API provides access to Tezos smart contract metadata, storage, entrypoints, views, and code. ...36.6Hegic Smart Contracts (Arbitrum)Hegic's core options protocol is implemented as smart contracts on Arbitrum One. Developers can interact di...36.2BanQu Smart Contracts APIAutomation workflows that react to system events36.1SuperRare Smart Contracts - Assets (ERC-721)SuperRare ERC-721 NFT asset contracts including shared minting contracts (SuperRareV1, SuperRareV2), creato...35.8SuperRare Smart Contracts - The BazaarUnified marketplace and auction house smart contract on Ethereum that enables reserve-price auctions, sale ...35.8Polygon ID Verifier SDKThe Verifier SDK enables web2 and web3 applications to authenticate users based on verifiable credentials w...34.7XMTP App Chain RPC APIJSON-RPC API for the XMTP Layer-3 appchain built on Arbitrum and settling to Base. Used for smart contract ...34.7HyperIndex GraphQL APIAuto-generated GraphQL API exposing indexed smart contract events from any EVM-compatible chain. HyperIndex...34.4Blast Gas Revenue APIProgrammatic interface for dApps to claim back a share of the net gas revenue generated by their contracts ...33.5Thought Machine Vault Core APIVault Core is Thought Machine's cloud-native core banking engine. Its API surface spans a REST Core API for...32.2Manifold Creator Core Smart ContractsOpen-source Solidity smart contract framework for deploying ERC721 and ERC1155 creator-owned NFT contracts....32.0Manifold Marketplace ContractsSmart contract system powering Manifold Gallery listings and Marketplace Widgets. Supports Auction Listings...32.0Manifold Royalty RegistryOn-chain smart contract registry that serves as a single source of truth for NFT royalties across all major...32.0Band VRFBand VRF is a provably fair, verifiable random function for on-chain randomness. It allows smart contracts ...31.9Cairo LanguageCairo is StarkWare's Turing-complete language for creating provable programs and the canonical smart contra...31.9Tenderly REST APICore REST API for managing Tenderly projects including smart contract simulations, alerts, Web3 Actions, co...31.7THORChain Smart Contracts APIThe Smart Contracts API from THORChain — 2 operation(s) for smart contracts.31.7EigenLayer Core ContractsSolidity smart contracts that implement the EigenLayer restaking protocol - StrategyManager, DelegationMana...30.4Scroll ContractsSolidity contracts that implement the Scroll rollup - L1 / L2 messengers, gateways, ScrollChain commit/fina...30.1Mantle Liquid Staking Protocol (mETH)Mantle LSP issues mETH, a liquid staking token backed by ETH staked to Ethereum validators. Smart contracts...29.0Tatum Smart Contract APIREST API to deploy, invoke, and read smart contracts on EVM and other chains.29.0Foundation Smart Contract APIEthereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Su...28.8Push Chain Contract Helpers (UEAFactory)On-chain contract helpers deployed at 0x00000000000000000000000000000000000000eA (UEAFactory). getOriginFor...28.4Curve Smart ContractsCurve's primary surface for swaps and liquidity is a set of audited Vyper smart contracts deployed across m...28.1Sei EVM JSON-RPC APIEthereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods f...28.0Hiro Smart Contracts APIRead-only endpoints to obtain Clarity smart contract details26.8Proof of Liquidity ProtocolBerachain's economic coordination layer — Reward Vaults, BGT, and validator boost contracts that turn block...26.6Vesper Contracts API ReferenceSmart contract interface reference for Vesper pools, strategies, PoolAccountant, PoolRewards, and related o...26.5Blockscout Smart Contracts APIThe Smart Contracts API from Blockscout — 3 operation(s) for smart contracts.26.2
Emerging 19 Early or largely undocumented
Helium Program Library (Solana)Open-source Solana on-chain programs and TypeScript client SDKs powering the Helium DAO, sub-DAOs, HNT / IO...24.1Raydium Solana ProgramsRaydium's swap, AMM, CLMM, farm, and launchpad programs deployed on Solana.23.95ireChain Mainnet JSON-RPCEthereum-compatible JSON-RPC 2.0 endpoint for the 5ireChain mainnet (EIP-155 chain ID 995, native currency ...23.3Pendle Boros Core Smart ContractsOpen-source Solidity core for Boros — the order-book / margin venue that lets traders long or short yield r...22.9Pendle Router Static (On-chain Helper)RouterStatic is an on-chain read-only helper contract that exposes simulation and quoting functions used by...22.9Pendle SY (Standardized Yield) ContractsPublic repository of Standardized Yield (SY) wrapper contracts that adapt every supported yield-bearing ass...22.9Pendle V2 Core Smart ContractsOpen-source Solidity implementation of the Pendle V2 protocol — Router, MarketFactory, Market, PT, YT, vePE...22.9Hyperledger Fabric APIHyperledger Fabric is a permissioned distributed ledger platform. Programmatic access is provided via the F...22.4Sudoswap Smart Contract APIOn-chain smart contract interface for the Sudoswap AMM protocol. Developers interact with LSSVMPairFactory ...22.4Aave V3 Pool (Smart Contracts)Core Aave V3 protocol contracts — Pool, L2 Pool, Wrapped Token Gateway, PoolAddressesProvider, Pool Configu...21.8Aave V4 Protocol (Smart Contracts)Next-generation Aave V4 protocol implementation with unified liquidity layer, hub-and-spoke architecture, a...21.8BNY Data On-ChainPublic, smart-contract-only product that broadcasts BNY-attested fund accounting data to public blockchains...20.5Acala EVM+ JSON-RPCAcala EVM+ exposes a standard Ethereum JSON-RPC API through the EVM+ RPC Adapter, which wraps Substrate RPC...19.1Rocket Pool Protocol API (rocketpool-js)The rocketpool-js library is a TypeScript/JavaScript client for the Rocket Pool protocol's deployed smart c...18.7Lens Protocol Smart ContractsThe Lens v3 smart contracts implement the onchain social graph on Lens Chain. Core primitives include Accou...18.6Quant Overledger APIOverledger APIs provide a single unified interface for building cross-ledger applications, including endpoi...18.3Alchemix Smart Contract APIThe primary developer interface for Alchemix is its on-chain smart contracts deployed on Ethereum Mainnet, ...17.4Balancer Smart ContractsVault and Router smart contracts where swaps and liquidity actions are executed on-chain. v2 and v3 version...15.7Pump.fun On-Chain Program (Solana)The deployed Solana program that implements Pump.fun's token factory and bonding-curve market. Integrators ...12.2

Companies reaching this through an API (35)

These companies publish an API, specification or operation carrying “Smart Contracts” 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.

Aave Alchemix Altimate AI Balancer Band Protocol BanQu Berachain Blast Blockscout BNY Mellon broke2built Chainalysis Curve Finance EigenLayer Fireblocks Foundation Hegic Helium Network Hiro Hyperliquid Mantle Network Pendle Finance Polygon ID Pump.fun Push Protocol Raydium Scroll Sei Starknet Sudoswap SuperRare Tatum THORChain Vesper Finance XMTP

Score breakdown

Frequency
62.7
log-scaled weighted occurrences
Breadth
3.4
spread across providers
Quality lift
31.3
mean composite of providers using it
Cohesion
28.1
strength of nearest seed neighbor

Where this tag sits

Blockchain broader

Related tags

Ethereum 74 co-occurrences DeFi 80 co-occurrences Web3 107 co-occurrences Blockchain 130 co-occurrences EVM 32 co-occurrences JSON-RPC 30 co-occurrences NFT 28 co-occurrences Layer 1 13 co-occurrences

Where this tag comes from

Provider tag129
Api tag65
Openapi tag5
Openapi op tag21

Cohort brief

Auto-generated

The 124 providers in the APIs.io catalog tagged Smart Contracts, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
124
all scored
Mean Kin Score
26.5
+3.6 vs catalog 22.9
Mean Agent Readiness
13.7
+1.8 vs catalog 11.9
Spread
0–65.5
median 25 · σ 14.6
How the 124 split by band
Exemplar 0Strong 4Developing 26Thin 28Emerging 45Minimal 21
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 40.7 23.2 +17.5 124
Discoverability 62.6 58.1 +4.5 124
Operational Transparency 17.9 13.7 +4.2 124
Contract Quality 21 17.6 +3.4 124
Contract Governance 5.3 6.3 -1 124
Access Clarity 19.9 26.5 -6.6 124

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) 19% 14% +5
MCP server (first-party) 18% 12% +6
Agent Skills 0% 0% 0
OAuth scopes 2% 11% -9
Security 100% 98% +2
Arazzo workflows 0% 2% -2
Governance rules 16% 14% +2

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 Solidus Labs 65.5
  2. 2 OpenZeppelin 60.2
  3. 3 Aptos 57.8
  4. 4 Block Lottos 55.5
  5. 5 0x 53.9
  6. 6 Aeternity 53.3
  7. 7 Moirai Labs 49.5
  8. 8 Linea 48
  9. 9 Digital Asset 47.7
  10. 10 Stellar 47.6
Top by Agent Readiness
  1. 1 Art Blocks 60
  2. 2 Hedera 56.1
  3. 3 Moirai Labs 51.4
  4. 4 Mysten Labs 48.6
  5. 5 Aeternity 45.6
  6. 6 Block Lottos 40.5
  7. 7 SIMBA Chain 39.4
  8. 8 Aelf 37.3
  9. 9 Gala Games 37
  10. 10 Seismic Systems 36.7
All 129 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.

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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.
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