established · -1.7 capabilitymarket resourcedomain

Smart Contracts

Score 25.3 / 100 129 providers +33 via APIs 60 APIs Search apis.io →

Providers using this tag (129)

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

Strong 2 Solid coverage with minor gaps
Solidus LabsCompanyComplianceRegTechTrade Surveillance5 APIs65.6Block LottosCompanyLotteryBlockchainWeb31 API55.6
Developing 23 Usable, with meaningful gaps to close
AleoCompanyBlockchainZero KnowledgeCryptography1 API41.2Quant NetworkBlockchainDistributed LedgerInteroperabilityOverledger2 APIs39.4AeternityBlockchainLayer 1Cryptocurrency4 APIs53.3OpenZeppelinWeb3BlockchainSecurity1 API52.8AptosBlockchainWeb3MoveLayer 11 API49.5Moirai LabsCompanyBlockchainWeb31 API49.5Digital AssetBlockchainTokenizationDigital AssetsFinancial Services6 APIs47.8SIMBA ChainCompanyBlockchainSupply ChainTraceability2 APIs47.5SupraBlockchainLayer 1OracleWeb31 API46.4Horizon Blockchain GamesCompanyConsumerBlockchainWeb37 APIs46.10xCryptocurrencyDeFiDEX AggregatorSwap2 APIs45.6OumlaCompanyBlockchainDigital AssetsWallet Infrastructure1 API45.5Agent ZeroAgentsAgent IntelligenceERC-8004x4021 API44.2BitbondCompanyTokenizationBlockchainDigital Assets2 APIs43.9AelfCompanyBlockchainLayer 1Web32 APIs43.8FortaCompanySecurityBlockchainWeb31 API43.3Mysten LabsCompanyBlockchainWeb3Sui3 APIs43.0Gala GamesCompanyBlockchainWeb3Gaming8 APIs41.5StellarBlockchainCryptocurrencyDecentralized ExchangeLedger4 APIs41.4Seismic SystemsCompanyBlockchainPrivacyEncryption1 API40.8WarpPay402 Studiox402MicropaymentsAI AgentsMCP2 APIs40.6LineaBlockchainEthereumLayer 2zkEVM1 API40.5BlockVisionCompanyBlockchainWeb3Data Infrastructure2 APIs39.4
Thin 28 Limited public surface area
EthereumBlockchainDeFiEthereumJSON-RPC1 API34.2CasperlabsBlockchainEnterpriseAI-Toolkit4 APIs33.6AuroraCompanyBlockchainEVMWeb31 API32.6API3BlockchainOracleDecentralizedData Feed1 API31.5CardanoCardanoBlockchainCryptocurrencyProof of Stake1 API30.7AlgorandBlockchainCryptocurrencyProof of StakeDeFi3 APIs39.2NervosCompanyWeb3BlockchainLayer 11 API37.9BscScanBlockchainBlock ExplorerBNB Smart ChainBSC1 API37.0Dapper LabsCompanyCryptocurrencyBlockchainWeb31 API35.7TransposeBlockchainNFTCryptocurrencyWeb31 API35.6BlocktorchCompanyWeb3ObservabilityMonitoring1 API35.5BasescanBlockchainBaseLayer 2Explorer1 API34.4ImmunefiCompanySecurityBug BountyVulnerability Disclosure1 API34.2GluwaCompanyBlockchainCryptocurrencyStablecoins1 API33.7Routescan (Snowtrace)BlockchainExplorerAvalancheEVM1 API33.6Thought MachineCompanyBankingCore BankingFinancial Services2 APIs33.6HederaHederaDistributed LedgerBlockchainDLT1 API33.2Limit BreakCompanyGamingBlockchain32.8PolygonScanBlockchainPolygonExplorerWeb31 API32.2CertoraCompanySecurityFormal Verification30.9CeloCompanyBlockchainEthereum L2Web31 API30.4AngleCompanyStablecoinsDecentralized FinanceBlockchain2 APIs29.3LidoLiquid StakingEthereumStakingDeFi7 APIs29.0EnvioBlockchainIndexerGraphQLWeb33 APIs28.8TezosTezosBlockchainTzKTBaking Bad1 API28.3TenderlyWeb3BlockchainEthereum6 APIs27.5Skale LabsCompanyBlockchainWeb31 API26.9=nil; FoundationCompanyZk InfrastructureBlockchainLayer 21 API26.5
Emerging 51 Early or largely undocumented
ManifoldNFTCreator ToolsBlockchain1 API25.2RedStoneCompanyInfrastructureBlockchainOracle2 APIs25.0AztecCompanyBlockchainPrivacyZero Knowledge22.6AgoricCompanyBlockchainJavaScript20.0FhenixCompanyWeb3BlockchainFully Homomorphic Encryption13.2BrevisCompanyZk CoprocessorZero-Knowledge ProofszkVM12.1Mina ProtocolCompanyWeb3BlockchainZero-Knowledge Proofs2 APIs26.0CoralCompanyWeb3Solana25.8ChainlensAnalyticsBlockchainBlock ExplorerCryptocurrency1 API25.6Art BlocksGenerative ArtNFTOn-Chain ArtBlockchain3 APIs25.5ParaSwapDeFiDEX AggregatorToken SwapsBlockchain1 API25.4Quai NetworkCompanyLayer 1BlockchainCryptocurrency1 API25.3thirdwebWeb3BlockchainWallets1 API25.1SuiBlockchainMoveWeb3Cryptocurrency1 API24.8FlowBlockchainNFTGamesDeFi1 API23.55ireBlockchainLayer 1EVM3 APIs23.4Alpen LabsCompanyCryptocurrencyBitcoinBlockchain1 API23.4OpynDeFiOptionsEthereumSqueeth3 APIs23.1Offchain LabsCompanyBlockchainEthereumLayer 23 APIs22.7HalbornCompanySecurityCybersecurityBlockchain21.7DFINITYCompanyBlockchainInternet ComputerICP1 API21.4SuperfluidCompanyWeb3BlockchainDeFi1 API21.3HyperledgerBlockchainDistributed LedgerEnterpriseLinux Foundation1 API20.9Offchain Labs (Arbitrum)CompanyCryptocurrencyBlockchainEthereum20.8ElementCompanyDeFiDecentralized FinanceFixed Income20.1Cozy FinanceCompanyDeFiRisk Management19.7ReflexerCompanyCryptocurrencyDeFiStablecoins1 API19.4AcalaCompanyCryptocurrencyBlockchainDeFi1 API19.2Rocket PoolBlockchainEthereumLiquid StakingProof of Stake2 APIs19.2InfinitySwapCompanyDeFiBlockchainEthereum1 API18.4Lithium FinanceCompanyCryptocurrencyDeFiOracle17.9MainframeCompanyDeFiBlockchainWeb31 API17.9CartesiBlockchainLayer 2Optimistic RollupsEthereum17.5InfinifiCompanyDeFiStablecoinsYield17.4Arch NetworkCompanyWeb3BitcoinBlockchain17.0My AICompanyRewardsLoyaltyWeb31 API16.8Code4renaCompanySecurityWeb316.7Forte LabsCompanyBlockchainWeb3Compliance16.7InstadappCompanyCryptocurrencyDeFiBlockchain16.7Term FinanceCompanyDeFiLendingFixed Rate16.5IthacaCompanyCrypto InfrastructureEthereumAuthentication16.1ZamaCompanyWeb3CryptographyFully Homomorphic Encryption16.1MoolaCompanyDeFiLendingBorrowing14.6Enosys MarketsCompanyDeFiBlockchainDecentralized Exchange13.8Exa FinanceCompanyBlockchainWeb3NFT13.6Silo FinanceCompanyDeFiLendingMoney Markets13.6Lens ProtocolLens ProtocolOnchain SocialWeb3Social Graph6 APIs12.6PartyDAOCompanyWeb3BlockchainEthereum12.5BlurNFTNFT MarketplaceNFT AggregatorNFT Lending12.4Bright Moments DAOCompanyNFTDAOGenerative Art11.7AmpCompanyCryptocurrencyBlockchainEthereum11.4
Minimal 25 Almost no public developer surface
MakerDAOCompanyCrypto DefiDeFiStablecoins10.2Saffron FinanceCompanyWeb3DeFiYield9.8Sound.xyzCompanyMusicWeb3Blockchain9.8SovrynCompanyDeFiBitcoinBlockchain9.8Anchor ProtocolCompanyCryptocurrencyDeFiBlockchain9.7Keep NetworkCompanyBlockchainCryptocurrencyBitcoin9.6HourglassCompanyDeFiBlockchainEthereum9.4AerodromeCompanyDeFiDecentralized ExchangeAMM9.0AmpleforthCompanyCryptocurrencyDeFiBlockchain7.8SturdyCompanyCryptocurrencyDeFiLending7.8Teller FinanceCompanyFintechDeFiLending7.3ether.fiEthereumLiquid RestakingLiquid StakingRestaking6.7YoloRektCompanyCryptocurrencyDeFiPrediction Markets6.5Alpha FinanceCompanyWeb3DeFiBlockchain6.2QuantstampCompanyEnterpriseBlockchainSecurity6.2Sec3CompanyWeb3SecurityBlockchain5.9Yield ProtocolCompanyCrypto DefiDeFiEthereum5.2Potion LabsCompanyDeFiOptions3.9AdjointCompanyFinancial ServicesTreasuryDistributed Ledger2.6ComputableCompanyCryptocurrencyBlockchainEthereum0.0Dharma LabsCompanyDeFiCryptocurrencyEthereum0.0Fei ProtocolCompanyDeFiStablecoinsEthereum0.0FimioCompanyDeveloper ToolsWeb3Fraud Prevention0.0KadenaCompanyWeb3Blockchain2 APIs0.0LevelCompanyStablecoinsDeFiCryptocurrency0.0

APIs with this tag (60)

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
Fireblocks Tokenization APIDeploy, mint, burn, and manage tokens across the chains supported by Fireblocks Tokenization Engine. Covers...67.2
Strong 1 Solid coverage with minor gaps
Altimate AI SMART_CONTRACTS APIThe SMART_CONTRACTS API from Altimate AI — 1 operation(s) for smart_contracts.56.0
Developing 7 Usable, with meaningful gaps to close
OpenZeppelin Contracts API ReferenceThe OpenZeppelin Contracts library provides a comprehensive collection of modular, reusable, and secure Sol...52.8OpenZeppelin Monitor APIOpenZeppelin Monitor is an open-source blockchain monitoring service that watches for specific on-chain act...52.8Moirai Agents API (A2A + MCP)A2A 1.0 agent ("A2A-compatible analytics and contract intelligence agent", version 0.1.0) with 11 skills — ...49.5SIMBA 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...43.9Stellar RPC APIThe Stellar RPC API (formerly Soroban RPC) is a JSON-RPC interface for interacting with Soroban smart contr...41.4Hexagate (Chainalysis)Web3 security product (acquired by Chainalysis) that monitors smart contracts and on-chain activity in real...40.3
Thin 18 Limited public surface area
BanQu Smart Contracts APIAutomation workflows that react to system events36.1Routescan Etherscan-Compatible Contract APIAccess verified smart contract ABIs, source code, and creation transaction data. Supports contract source c...33.6Routescan Etherscan-Compatible Logs APIQuery event logs emitted by smart contracts using filter parameters including address, block range, and up ...33.6Thought Machine Vault Core APIVault Core is Thought Machine's cloud-native core banking engine. Its API surface spans a REST Core API for...33.6SuperRare Smart Contracts - Assets (ERC-721)SuperRare ERC-721 NFT asset contracts including shared minting contracts (SuperRareV1, SuperRareV2), creato...32.0SuperRare Smart Contracts - The BazaarUnified marketplace and auction house smart contract on Ethereum that enables reserve-price auctions, sale ...32.0THORChain Smart Contracts APIThe Smart Contracts API from THORChain — 2 operation(s) for smart contracts.31.8HyperEVM JSON-RPCEVM-compatible JSON-RPC endpoint exposed by Hyperliquid for deploying and interacting with smart contracts ...31.3Hegic Smart Contracts (Arbitrum)Hegic's core options protocol is implemented as smart contracts on Arbitrum One. Developers can interact di...30.6Polygon ID Verifier SDKThe Verifier SDK enables web2 and web3 applications to authenticate users based on verifiable credentials w...29.1Blast Gas Revenue APIProgrammatic interface for dApps to claim back a share of the net gas revenue generated by their contracts ...28.8HyperIndex GraphQL APIAuto-generated GraphQL API exposing indexed smart contract events from any EVM-compatible chain. HyperIndex...28.8TzKT Big Maps APIThe Big Maps API indexes all Tezos big map allocations across smart contracts, exposing individual key-valu...28.3TzKT Contracts APIThe Contracts API provides access to Tezos smart contract metadata, storage, entrypoints, views, and code. ...28.3Curve Smart ContractsCurve's primary surface for swaps and liquidity is a set of audited Vyper smart contracts deployed across m...27.9Tenderly REST APICore REST API for managing Tenderly projects including smart contract simulations, alerts, Web3 Actions, co...27.5Tatum Smart Contract APIREST API to deploy, invoke, and read smart contracts on EVM and other chains.27.4XMTP App Chain RPC APIJSON-RPC API for the XMTP Layer-3 appchain built on Arbitrum and settling to Base. Used for smart contract ...27.2
Emerging 32 Early or largely undocumented
Cairo LanguageCairo is StarkWare's Turing-complete language for creating provable programs and the canonical smart contra...25.9Hiro Smart Contracts APIRead-only endpoints to obtain Clarity smart contract details25.3Sei EVM JSON-RPC APIEthereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods f...25.3Manifold Creator Core Smart ContractsOpen-source Solidity smart contract framework for deploying ERC721 and ERC1155 creator-owned NFT contracts....25.2Manifold Marketplace ContractsSmart contract system powering Manifold Gallery listings and Marketplace Widgets. Supports Auction Listings...25.2Manifold Royalty RegistryOn-chain smart contract registry that serves as a single source of truth for NFT royalties across all major...25.2Blockscout Smart Contracts APIThe Smart Contracts API from Blockscout — 3 operation(s) for smart contracts.24.7Band VRFBand VRF is a provably fair, verifiable random function for on-chain randomness. It allows smart contracts ...24.5EigenLayer Core ContractsSolidity smart contracts that implement the EigenLayer restaking protocol - StrategyManager, DelegationMana...24.4Pendle Boros Core Smart ContractsOpen-source Solidity core for Boros — the order-book / margin venue that lets traders long or short yield r...24.3Pendle Router Static (On-chain Helper)RouterStatic is an on-chain read-only helper contract that exposes simulation and quoting functions used by...24.3Pendle SY (Standardized Yield) ContractsPublic repository of Standardized Yield (SY) wrapper contracts that adapt every supported yield-bearing ass...24.3Pendle V2 Core Smart ContractsOpen-source Solidity implementation of the Pendle V2 protocol — Router, MarketFactory, Market, PT, YT, vePE...24.3Scroll ContractsSolidity contracts that implement the Scroll rollup - L1 / L2 messengers, gateways, ScrollChain commit/fina...24.15ireChain Mainnet JSON-RPCEthereum-compatible JSON-RPC 2.0 endpoint for the 5ireChain mainnet (EIP-155 chain ID 995, native currency ...23.4Mantle Liquid Staking Protocol (mETH)Mantle LSP issues mETH, a liquid staking token backed by ETH staked to Ethereum validators. Smart contracts...23.0Push Chain Contract Helpers (UEAFactory)On-chain contract helpers deployed at 0x00000000000000000000000000000000000000eA (UEAFactory). getOriginFor...23.0Foundation Smart Contract APIEthereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Su...22.8Vesper Contracts API ReferenceSmart contract interface reference for Vesper pools, strategies, PoolAccountant, PoolRewards, and related o...22.7Raydium Solana ProgramsRaydium's swap, AMM, CLMM, farm, and launchpad programs deployed on Solana.22.5Hyperledger Fabric APIHyperledger Fabric is a permissioned distributed ledger platform. Programmatic access is provided via the F...20.9Proof of Liquidity ProtocolBerachain's economic coordination layer — Reward Vaults, BGT, and validator boost contracts that turn block...20.7BNY 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...19.2Rocket Pool Protocol API (rocketpool-js)The rocketpool-js library is a TypeScript/JavaScript client for the Rocket Pool protocol's deployed smart c...19.2Helium Program Library (Solana)Open-source Solana on-chain programs and TypeScript client SDKs powering the Helium DAO, sub-DAOs, HNT / IO...19.1Alchemix Smart Contract APIThe primary developer interface for Alchemix is its on-chain smart contracts deployed on Ethereum Mainnet, ...17.5Sudoswap Smart Contract APIOn-chain smart contract interface for the Sudoswap AMM protocol. Developers interact with LSSVMPairFactory ...17.3Aave V3 Pool (Smart Contracts)Core Aave V3 protocol contracts — Pool, L2 Pool, Wrapped Token Gateway, PoolAddressesProvider, Pool Configu...15.8Aave V4 Protocol (Smart Contracts)Next-generation Aave V4 protocol implementation with unified liquidity layer, hub-and-spoke architecture, a...15.8Balancer Smart ContractsVault and Router smart contracts where swaps and liquidity actions are executed on-chain. v2 and v3 version...14.1Lens Protocol Smart ContractsThe Lens v3 smart contracts implement the onchain social graph on Lens Chain. Core primitives include Accou...12.6
Minimal 1 Almost no public developer surface
Pump.fun On-Chain Program (Solana)The deployed Solana program that implements Pump.fun's token factory and bonding-curve market. Integrators ...8.5

Companies reaching this through an API (33)

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 Chainalysis Curve Finance EigenLayer 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
61.3
log-scaled weighted occurrences
Breadth
2.9
spread across providers
Quality lift
25.9
mean composite of providers using it
Cohesion
27.5
strength of nearest seed neighbor

Where this tag sits

Blockchain broader

Related tags

Ethereum 74 co-occurrences DeFi 78 co-occurrences Web3 115 co-occurrences Blockchain 129 co-occurrences EVM 31 co-occurrences JSON-RPC 30 co-occurrences NFT 28 co-occurrences Cryptocurrency 65 co-occurrences

Where this tag comes from

Provider tag130
Api tag60
Openapi tag4
Openapi op tag17

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
of 129 in the catalog
Mean Kin Score
25.6
+3.4 vs catalog 22.2
Mean Agent Readiness
14.4
+2.4 vs catalog 12
Spread
0–65.6
median 24.9 · σ 13.6
How the 124 split by band
Exemplar 0Strong 2Developing 23Thin 28Emerging 51Minimal 20
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 40.5 23.2 +17.3 124
Discoverability 62.7 57.9 +4.8 124
Contract Quality 21.7 17.2 +4.5 124
Operational Transparency 15.9 13 +2.9 124
Contract Governance 6.1 6.5 -0.4 124
Access Clarity 15.1 23.9 -8.8 124

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% 13% +6
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 19% 16% +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 Solidus Labs 65.6
  2. 2 Block Lottos 55.6
  3. 3 Aeternity 53.3
  4. 4 OpenZeppelin 52.8
  5. 5 Aptos 49.5
  6. 6 Moirai Labs 49.5
  7. 7 Digital Asset 47.8
  8. 8 SIMBA Chain 47.5
  9. 9 Supra 46.4
  10. 10 Horizon Blockchain Games 46.1
Top by Agent Readiness
  1. 1 Hedera 58.5
  2. 2 Art Blocks 57.8
  3. 3 Moirai Labs 49.6
  4. 4 Mysten Labs 48.6
  5. 5 Aeternity 45.2
  6. 6 SIMBA Chain 42.7
  7. 7 Block Lottos 39.6
  8. 8 Aelf 39
  9. 9 Seismic Systems 38.2
  10. 10 Quant Network 36.2
All 129 members of this roster resolve to a provider in the catalog; 124 carry a score (96%). The figures above describe the scored members only.
Coverage caveat. 117 of 124 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 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

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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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