established · 0.7 marketcapability domainschema

x402

Score 27.2 / 100 146 providers +40 via APIs 119 APIs Search apis.io →
Business capabilities this tag reaches
Agent Infrastructure & Agentic Commerce 4 Data & Reference Information Services 1 Subscription Billing & Revenue Management 1

Providers using this tag (146)

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

Exemplar 7 Complete, well-documented, and agent-ready
DrippayCompanyBillingUsage-Based BillingMetering1 API76.80xArchiveMarket DataHistorical DataCryptocurrencyDeFi1 API75.7MandateShieldCompanyPaymentsAgentic CommerceAI Agents1 API70.7AgoragenticAgentsAgentic CommerceAgent RuntimeMarketplace1 API70.1DelxAgentsAI AgentsMCPA2A2 APIs69.4MolTrustAI AgentsAgent IdentityDecentralized IdentityVerifiable Credentials4 APIs68.2Hive CivilizationAgentsAgentic CommerceA2AMCP3 APIs66.5
Strong 29 Solid coverage with minor gaps
x402 List APICryptocurrency402Agentic Payments1 API59.9aicomglobalAgentsAgentic CommerceA2AMCP1 API54.4SCVD General StoreAgentsAgentic CommercePayments1 API65.9AnyAPIDeveloper ToolsDataSearchWeb Scraping2 APIs64.8FarmDash Agent HubDeFiDeFAIAI AgentsMCP6 APIs64.5HiltPaymentsSolanaStablecoinsUSDC2 APIs63.9TaskHawk SystemsAI GovernanceAgent SecurityRuntime EnforcementPolicy Enforcement1 API62.3FeedOracle TechnologiesCompanyMCPAgent InfrastructureA2A3 APIs62.2PagesnapDeveloper ToolsWeb Scrapingweb-to-markdownScreenshots1 API61.8DiffiCatCompanyWebsite MigrationVisual RegressionTesting1 API60.6EmbossPDFFormsDocument ProcessingForm Filling3 APIs60.32sAgentsAgentic CommerceMCP1 API59.7ByKaranteliCryptocurrencyCrypto DerivativesMarket DataFunding Rates2 APIs59.4Dynamic FeedLive DataAI AgentsMCPA2A4 APIs59.1Green HelixAgentsAgentic CommercePaymentsEscrow2 APIs58.6cogDepotCompanyAI AgentsAgent MarketplaceMarketplace1 API58.3Agent ReadyAgentsAgent ReadinessWebsite ScanningDeveloper Tools3 APIs58.1AlgoVoiPaymentsAgentic CommerceA2A5 APIs58.0GradeIPTVStreamingLive TVLive Radio1 API58.0SirenicCompany DataBusiness RegistryKYBSanctions Screening1 API57.7Anchor TerminalCompanyAI AgentsAgent ToolsMCP1 API57.4HumanMirrorCompanyAI AgentsAgent SecurityPrompt Injection Defense17 APIs57.4Seshat MarketsFinanceFintechCryptocurrencyCommodities1 API56.7CoinbaseBlockchainCryptocurrencyCustodyExchange4 APIs56.6ClawSpanAI AgentsAgent MarketplaceAgent-NativeMCP2 APIs56.0HookPulseMonitoringObservabilityCronWebhook1 API55.0Coin RailzCompanyPaymentsAgents2 APIs54.7TrustBoost PII SanitizerPrivacyPII RedactionData ProtectionLLM Security1 API54.6invinoveritasAI AgentsAgent VerificationAgent GovernanceMCP2 APIs54.3
Developing 62 Usable, with meaningful gaps to close
DeFi Fintech DirectoryCompanyDeFiFintech2 APIs51.8anchor-x402CompanyAgentsPayments1 API50.3SolvelaCompanyPaymentsArtificial IntelligenceLLM Gateway1 API48.9AGENTUMCompanyBusiness IntelligenceKYBCompany Data2 APIs43.2WarpPay402 StudioMicropaymentsAI AgentsMCP2 APIs40.9Hive Agent IQAgentsAgentic CommerceA2AMCP4 APIs54.2Pictomancer.aiCompanyImageImage OptimizationImage Processing1 API54.1Ultravioleta DAOCompanyAI AgentsAgent MarketplaceTask Marketplace2 APIs54.0XGuardAgentsAgentic CommerceMCP2 APIs54.0MERCURYCompanyAgentsA2AMCP1 API53.5brick.blueAI AgentsAgent MarketplaceAgent DiscoveryTask Exchange2 APIs53.4HyperbrowserBrowser AutomationBrowser InfrastructureWeb ScrapingWeb Crawling1 API53.2iwant.fyiAgentic CommerceMarketplaceAI AgentsPurchase Intent1 API53.1Meta Agent ToolsDeveloper ToolsAPI RegistryAgent RegistryMCP1 API53.0broke2builtCompanyAI AgentsAgent ToolsData Intelligence2 APIs52.2Vaultfire ProtocolAI AgentsAgent IdentityTrustReputation1 API51.8LVL LTD COAgentsAgentic CommerceAgent SkillsA2A1 API51.3gpt55-token-gatewayAgentic PaymentsMCPA2A4 APIs51.1Atomadic TechCompanyAI AgentsAgent InfrastructureMCP1 API50.9CommsHarborEmailTransactional EmailEmail MarketingCommunications1 API50.9EditalMDGovTechPublic ProcurementBrazilPNCP1 API50.9FigmentStakingBlockchainDigital AssetsProof of Stake1 API50.8Macaroon NetworkAgentsAgentic CommerceA2AMCP1 API50.5PostalFormPhysical MailPrint & MailPostal MailCertified Mail2 APIs50.5CONNSKILLCompanySEOSERPKeyword Research2 APIs50.301MindAgentsAgentic CommerceA2AMCP1 API49.7PlyriumCompanyAgent SkillsSupply Chain SecuritySoftware Provenance1 API49.4PageAuditTechnical SEOSEO auditingDeveloper ToolsAgent-Native1 API49.3SpongeCompanyAgentic PaymentsAI AgentsWallets1 API49.2APIMeshWeb AnalysisSEOWeb SecurityEmail Verification2 APIs49.1Decision AnchorAgentsAgent AccountabilityDecision RecordsAudit Trail1 API49.1HostDeFiSolanaToken RiskDeFirug pull1 API48.7Council of AIAI GovernanceAI MeasurementAI SafetyEU AI Act3 APIs47.9Merit SystemsCompanyAgentic CommercePayments2 APIs47.8ingest0rCompanyReal EstateProperty RecordsProperty Data1 API47.4Marz Greta-Lock NetworkCompanyAI AgentsAgent EvaluationBenchmarking1 API47.2Verified Digital Agents (VDA)CompanyAI AgentsAI GovernanceCompliance6 APIs47.0Agent Health MonitorAgentsAgent TrustRisk ScoringWallet Intelligence4 APIs46.8Agent ExchangeAgentsAgentic CommerceMCP3 APIs46.2ChainAware.aiBlockchainWeb3DeFiFraud Prevention1 API46.2Venice.aiCompanyArtificial IntelligenceLLMImage Generation1 API46.2MUJ428AgentsAgent TrustAgentic CommerceA2A3 APIs45.8GloriaCompanyNewsCryptocurrencyMarket Intelligence2 APIs45.71F916AI AgentsAgent SocietyForumsMCP1 API44.4TradeDataHub Public APIcontractor dataB2B DataBusiness ListingsDatasets1 API44.3Kann KI das? Sponsoring AgentCompanySponsoringAdvertisingSoftware Reviews1 API43.9ServGhost Agent APICloud InfrastructureVPS hostingDedicated ServersGPU Compute1 API43.8AmbrCompanyAI AgentsAgentic CommerceContracts3 APIs43.6Hergert SynthoraCompanyAgentsA2AMCP2 APIs43.6AvalixAgentsAgentic CommerceA2AMCP1 API43.3PaulieB14BlockchainOn-Chain DataThe GraphSubgraph1 API43.3BerrerAgentsAgentic CommerceA2AMCP1 API43.1PoolPartyMedia DistributionBroadcastingVideoAgents3 APIs42.7Agent ZeroAgentsAgent IntelligenceERC-80041 API42.6BMC XIVCompanySecurityCybersecurityBreach Intelligence1 API42.5Radar CNPJBusiness & Company DataGovernment open dataReceita FederalCNPJ1 API42.2Liquid AgentTokenized StocksDeFiInvestingAgentic Commerce2 APIs41.9PolicyCheckCompanyPolicy AnalysisConsumer ProtectionE-Commerce2 APIs41.4shveikCompanyAI AgentsWeb Scraping10 APIs41.3LibertAICompanyArtificial IntelligenceInferenceModel Routing2 APIs41.1AgMsgMessagingAI AgentsA2AChat2 APIs39.8ExponentialCompanyDeFiDecentralized FinanceYield2 APIs39.5
Thin 26 Limited public surface area
agent402.devCompanyAgentic PaymentsAgentic Commerce1 API39.1GONNACompanyAgentsAgentic Commerce1 API38.3Agents on LeaveArtificial IntelligenceAgentsPlaygroundPayments1 API35.3OnTopX402USDCAgentic Paymentspaid-placement1 API34.0Quietforge StudioArtificial IntelligenceDocument ProcessingMicropayments1 API33.8X402 AI 自助门店Agentic CommerceAI AgentsA2A1 API31.9ARAKEL Machine Evidence Networkmachine-evidenceComplianceSanctions ScreeningOFAC1 API31.3EventEdge OraclePrediction MarketsAI AgentsPolymarket1 API29.3_doneDeveloper ToolsUtility APIsAI AgentsAgent-Native26 APIs37.8KG-NINJAAgentsAgentic CommerceA2AMCP1 API37.3KiteAgentic PaymentsAI AgentsStablecoins3 APIs36.3AIScanAI VisibilityWebsite AuditingSEOAnswer Engine Optimization3 APIs36.2QoreviaMarket DataGoldXAUUSDTrading1 API36.1Chado StudioAgentsA2ADeFi1 API35.8Phi LongevityCompanyHealthcareHealth DataLab Results2 APIs35.3IntentGuardCompanyArtificial IntelligenceAgentsModel Routing1 API34.1SnowSignalsCryptocurrencyMarket DataBitcoinAnalytics2 APIs33.8Scro Orphan DeskAI AgentsA2ADeFi2 APIs33.6Artem / A2A SandboxAgentsAgentic CommerceA2A1 API31.8DEUSPROOFAgentsAgent IdentityProvenanceNotary3 APIs31.3Serbia Company DataSerbiaCompany DataBusiness RegistryOpen Data1 API30.9Nous ResearchCompanyArtificial IntelligenceMachine LearningLLM2 APIs29.9SINCORCompanyAI AgentsA2AAgentic Commerce1 API29.3openclaw / evm-labAgentsA2AXRPL1 API28.9BlockscoutBlockscoutWeb3ExplorerOpen Source1 API27.5CablesMCP ServerAgent-NativePay-per-call1 API27.0
Emerging 16 Early or largely undocumented
Agents Get Paid MoreFintechPaymentsMonetization2 APIs17.6Crest Deployment Systems LLCCompanyAI AgentsAgent ReputationTrust and Safety15.0ScalpStreamCompanyAgentsA2A5 APIs25.2CrosscheckArtificial IntelligenceVerificationPayments1 API24.7KOA LabsAgentsMCPA2AAgent Discovery2 APIs24.0Grok & MonAI AgentsA2AMCP3 APIs23.7Wib&Wob (symbients)CompanyAgentsA2A1 API23.4MoleculeCompanyDeSciDecentralized ScienceBlockchain1 API22.7block402-xyzBlockchainAI AgentsEthereumBitcoin1 API22.5Gleeful AIArtificial IntelligenceAgentsMicropayments1 API21.6ZeroclickCompanyArtificial IntelligenceAgentic CommerceAgentic Payments20.4Verse (autonomous agent)CompanyAI AgentsAutonomous AgentsA2A2 APIs19.654ch10wallet-riskPhishingScam Detectionurl reputation1 API18.4RedotpayCompanyPaymentsFintechStablecoins1 API18.4convrgent-aiArtificial IntelligencePersonality-IntelligenceMicroservices1 API16.5callagent.proAI AgentsVoiceTelephonyPhone Agents1 API13.2
Minimal 6 Almost no public developer surface
Agent ToolsDiscoveryDirectoryMCP1 API10.9400860 x402 Growth and Safety CatalogAI AgentsA2AAgentic Payments2.3xiaoyueguangCompanyA2AAgents0.0APEXBlockchainCryptocurrencyFaucetSolana1 API9.6TorquantisCompanyAI AgentsAgent MarketplaceA2A2.2//HERECompanyAgentsA2AAgentic Commerce0.0

APIs with this tag (117)

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 7 Complete, well-documented, and agent-ready
Telnyx X402 APIThe x402 API from Telnyx — 3 operation(s) for x402.79.4Airbyte X402 APIThe X402 API from Airbyte — 1 operation(s) for x402.77.5Cracked API X402 APIThe X402 API from Cracked API — 1 operation(s) for x402.73.1Delx X402 APIThe x402 API from Delx — 987 operation(s) for x402.69.4MolTrust X402 APIThe X402 API from MolTrust — 2 operation(s) for x402.68.2Hive Civilization X402 APIThe X402 API from Hive Civilization — 18 operation(s) for x402.66.5Hive MCP Gateway and RegistryProvider-operated remote MCP gateway on Render (named as the MCP transport by receipts.thehiveryiq.com/.wel...66.5
Strong 16 Solid coverage with minor gaps
SCVD Evidence Agent (A2A)Agent2Agent protocol surface: an agent card served from https://scvd.store/.well-known/agent-card.json (and...65.9SCVD General Store MCP ServersThree remote Model Context Protocol servers on the apex host, all Streamable HTTP and all answering initial...65.9Hilt Pay Agent Gateway (MCP + A2A)Hosted MCP server at https://api.hilt.so/mcp (streamable HTTP, protocol 2025-06-18, server Hilt Pay Agent G...63.9FeedOracle Technologies X402 APIThe x402 API from FeedOracle Technologies — 1 operation(s) for x402.62.2Pagesnap X402 APIKeyless USDC per-call payment61.8Emboss A2A AgentAgent2Agent interface at https://api.getemboss.ai/a2a (JSON-RPC, A2A 1.0) discovered through a signed agent...60.32s A2A AgentAgent2Agent (A2A) protocol surface: an agent card served from https://2s.io/.well-known/agent-card.json (pr...59.72s MCP ServerRemote Model Context Protocol server at https://2s.io/mcp (Streamable HTTP, POST only, protocol version 202...59.7ByKaranteli X402 APIPer-call priced history and depth endpoints, settled in USDC over the x402 protocol on Solana and Base main...59.4AlgoVoi X402 APIThe x402 API from AlgoVoi — 2 operation(s) for x402.58.0Sirenic A2A AgentAgent2Agent JSON-RPC endpoint exposing the 116 paid routes as A2A skills (skill ids are the OpenAPI path te...57.7Sirenic MCP ServerRemote Model Context Protocol server (streamable HTTP) over the same official French and European company-d...57.7HumanMirror Machine APIMachine API for autonomous-agent safety, deterministic execution receipts, payment compatibility, and x402 ...57.4HumanMirror X402 APIThe X402 API from HumanMirror — 54 operation(s) for x402.57.4TrustBoost A2A AgentAgent2Agent surface: an agent card served from https://api.trustboost.dev/.well-known/agent-card.json (vers...54.6aicomglobal X402 APIThe X402 API from aicomglobal — 1 operation(s) for x402.54.4
Developing 47 Usable, with meaningful gaps to close
XGuard A2A AgentAgent2Agent surface: an agent card served identically from https://api.xguardgate.com/.well-known/agent-car...54.0MERCURY MCP ServerHosted Model Context Protocol server (serverInfo mercury-x402 1.0.0, protocolVersion 2025-06-18, streamable...53.5MERCURY Web Fetch A2A AgentAgent-to-Agent (A2A 0.3.0) surface for "MERCURY Web Fetch", published as a conformant agent card at https:/...53.5MadeOnSol x402 Robinhood Chain APIKeyless x402 pay-per-call subset of MadeOnSol for Robinhood Chain: 10 operations priced per call in USDG on...53.4MadeOnSol x402 Solana APIKeyless x402 pay-per-call subset of MadeOnSol for Solana: 25 operations priced per call in USDC on Solana, ...53.4Hyperbrowser Web APIStateless web utilities: fetch a single page, run a web search, or start a crawl. Includes `/x402` micropay...53.2Hyperbrowser X402 APIThe X402 API from Hyperbrowser — 2 operation(s) for x402.53.2Monid x402 Run APIPay-per-run execution surface on x402.monid.ai — POST /v1/run answers HTTP 402 with an accepts[] array of C...52.5Vaultfire Trust Service (x402)The priced projection of the same trust surface: 77 endpoints under /api/x402/* (29 priced GET reads, 46 pr...51.8LVL LTD Skill Market A2A AgentAgent2Agent surface: an Ed25519-JWS-signed agent card (protocolVersion 1.0.0, JSONRPC transport, version 1....51.3GPT55 Model Gateway A2A AgentAgent2Agent surface: an agent card served at https://gpt55.558686.xyz/.well-known/agent-card.json (and iden...51.1GPT55 x402 Gateway MCP ServerRemote Model Context Protocol server at https://gpt55.558686.xyz/mcp (Streamable HTTP; a GET returns the se...51.1gpt55-token-gateway X402 APIThe x402 API from gpt55-token-gateway — 1 operation(s) for x402.51.1huggingbay-xyz X402 APIThe X402 API from huggingbay-xyz — 2 operation(s) for x402.51.0Figment X402 APIThe x402 API from Figment — 5 operation(s) for x402.50.8kairossignal-com X402 APIThe x402 API from kairossignal-com — 11 operation(s) for x402.50.7Macaroon Network MCP ServerThe network router MCP server — a live Streamable HTTP endpoint at https://api.macaroonnetwork.com/mcp (ser...50.5CONNSKILL Growth Services A2A AgentA2A merchant agent (protocolVersion 0.3.0, JSON-RPC at agent.connskill.com/a2a) whose card at /.well-known/...50.3CONNSKILL Growth Services MCP ServerModel Context Protocol surface for the same catalogue: a hosted Streamable-HTTP endpoint at agent.connskill...50.301Mind A2A AgentAgent2Agent (A2A) protocol surface: an agent card served from https://01mind.net/.well-known/agent-card.jso...49.7APIMesh MCP Server@mbeato/apimesh-mcp-server (npm, v1.8.2, 2026-04-26; io.github.mbeato/apimesh in the official MCP registry)...49.1Council of AI GSPC MCP ServerRemote Model Context Protocol server at https://councilof.ai/mcp (Streamable HTTP, protocol 2025-06-18, ser...47.9Council of AI X402 APIThe X402 API from Council of AI — 11 operation(s) for x402.47.9Cook County (Chicago) Property Records MCP ServerA live remote MCP server at https://api.ingest0r.com/mcp (streamable-http, JSON-RPC 2.0 over HTTP POST, pro...47.4Agent Exchange MCP ServerRemote Model Context Protocol server at https://store.agentexchange.work/mcp (Streamable HTTP; a GET return...46.2Agent Exchange X402 APIThe x402 API from Agent Exchange — 63 operation(s) for x402.46.2ChainAware A2A Agent and x402 APIAgent-facing surface on api.chainaware.ai: an A2A 0.3.0 agent card at /.well-known/agent-card.json (also at...46.2The Agent Exchange Clearing HouseThe agent-to-agent task market at https://exchange.agentexchange.work: agents register a free reputation pa...46.2Venice.ai X402 APIWallet-based API access using the x402 protocol. No API key required — authenticate with an EVM or Solana w...46.2flexyield-io X402 APIThe X402 API from flexyield-io — 2 operation(s) for x402.46.0Gloria MCP ServerHosted, remote MCP server (Streamable HTTP at https://mcp.itsgloria.ai/mcp, serverInfo "Gloria AI" 1.26.0, ...45.7Gloria X402 APIPay-per-request access to Gloria news over the x402 protocol with no account or API key: GET /news ($0.03),...45.7makespdf-com X402 APIThe x402 API from makespdf-com — 2 operation(s) for x402.43.7Ambr REST APIJSON REST API at https://getamber.dev/api/v1 for the full mandate lifecycle: list templates (public), creat...43.6ai-akari-ai X402 APIHTTP 402 resources. Payment is never inferred or automatic.43.3Autonoma A2A AgentAgent2Agent (A2A) protocol surface: an agent card served from https://avalix.ai/.well-known/agent-card.json...43.3Avalix X402 APIThe X402 API from Avalix — 2 operation(s) for x402.43.3BerrerGate A2A AgentAgent2Agent surface: an agent card served from https://api.berrergate.com/.well-known/agent-card.json (cont...43.1satohub-ai X402 APIThe x402 API from satohub-ai — 3 operation(s) for x402.42.8skavio-eu X402 APIThe X402 API from skavio-eu — 7 operation(s) for x402.42.8Agent Zero A2A AgentAgent2Agent surface: an agent card served from https://onchainagentintel.io/.well-known/agent-card.json (mi...42.6tektolo-com X402 APIThe x402 API from tektolo-com — 13 operation(s) for x402.41.5PolicyCheck x402 Analysis APIPay-per-request analysis over the x402 protocol: POST https://policycheck.tools/api/x402/analyze answers HT...41.4WarpPay402 MCP ServerHosted MCP server at https://api.warppay402.com/mcp exposing the same 19 tools as the REST API (public_data...40.9PaidHandshake Exchange X402 APIThe X402 API from PaidHandshake Exchange — 3 operation(s) for x402.40.4Agentic Endpoints X402 APIThe X402 API from Agentic Endpoints — 1 operation(s) for x402.39.7stratalize-com X402 APIThe X402 API from stratalize-com — 202 operation(s) for x402.39.3
Thin 29 Limited public surface area
LEGIT A2A Agent CardAgent card served from https://legit.gonna.bond/.well-known/agent.json and, byte-identical, from the canoni...38.3_done CatalogSingle-page agent-native catalog of the 27 _done pay-per-call utility APIs. Publishes a real llms.txt, a ro...37.8Agent Verification Utility A2A AgentAgent2Agent (A2A) 1.0 surface: an agent card served from https://agent-economy.kgninja.dev/.well-known/agen...37.3Agent Verification Utility MCP ServerRemote Model Context Protocol server at https://agent-economy.kgninja.dev/mcp — stateless Streamable HTTP, ...37.3AlgoVault APIAlgoVault API as documented publicly: 18 operations. Contract generated from the documentation by API Evang...36.5AIScan A2A AgentAgent2Agent (A2A) protocol surface: an agent card served from https://getaiscan.app/.well-known/agent-card....36.2Qorevia Universal Agent Gateway (MCP + A2A)The free discovery and routing layer in front of the paid tools, served from the same origin. MCP: https://...36.1crvUSD Yield Optimizer A2A AgentAgent2Agent surface of the same service: an agent card at https://llama.box/yo/.well-known/agent.json (prot...35.8The Retreat X402 APIThe X402 API from The Retreat — 15 operation(s) for x402.35.6call4me X402 APIThe X402 API from call4me — 1 operation(s) for x402.35.3Phi Longevity PRISM MCP ServerOfficial Model Context Protocol server for the PRISM biomarker-analysis engine. Hosted Streamable HTTP at h...35.3aiagentscity-com X402 APIThe X402 API from aiagentscity-com — 3 operation(s) for x402.35.0Quietforge x402 Service Index APIA searchable, health-probed index of live x402 pay-per-call endpoints re-crawled from the Coinbase CDP and ...33.8Attested Memory X402 APIThe X402 API from Attested Memory — 1 operation(s) for x402.32.5textforagents-com X402 APIThe X402 API from textforagents-com — 1 operation(s) for x402.32.1ProveCart X402 APIThe X402 API from ProveCart — 5 operation(s) for x402.32.0X402 AI 自助门店 x402 Facilitator APIA self-hosted x402 facilitator role on the same host - POST /facilitator/verify and POST /facilitator/settl...31.9Artem / A2A Sandbox X402 APIThe X402 API from Artem / A2A Sandbox — 1 operation(s) for x402.31.8Sandbox Contractor Agent (A2A)Agent2Agent protocol surface: an agent card served from https://a2a.elonsusk.com/.well-known/agent-card.jso...31.8Physical Capability Cloud X402 APIThe X402 API from Physical Capability Cloud — 2 operation(s) for x402.31.7Parley X402 APIThe X402 API from Parley — 1 operation(s) for x402.31.1surewhynot-app X402 APIThe X402 API from surewhynot-app — 6 operation(s) for x402.29.5Altcoin Chasers HQ X402 APIThe X402 API from Altcoin Chasers HQ — 9 operation(s) for x402.29.2compuute-se X402 APIThe x402 API from compuute-se — 1 operation(s) for x402.29.2ADEXTO X402 APIThe X402 API from ADEXTO — 1 operation(s) for x402.29.0onchain-risk-oracle A2A AgentAgent2Agent (A2A) protocol surface: an agent card at https://oracle.evebrief.org/.well-known/agent-card.jso...28.9AINumbers.co X402 APIThe x402 API from AINumbers.co — 6 operation(s) for x402.27.3dnsofmoney-com X402 APIThe x402 API from dnsofmoney-com — 4 operation(s) for x402.27.147620-xyz X402 APIThe x402 API from 47620-xyz — 2 operation(s) for x402.26.5
Emerging 17 Early or largely undocumented
Who Represents This Address (RJH Signal Technologies) X402 APIThe X402 API from Who Represents This Address (RJH Signal Technologies) — 1 operation(s) for x402.25.5Horse Truth X402 APIThe X402 API from Horse Truth — 1 operation(s) for x402.25.4Birdeye (Solana data) resources APIBirdeye (Solana data) resources API as documented publicly: 66 operations. Contract generated from the docu...25.3AirScoutMachine-payable air-quality queries over x402 with global coverage: current US AQI and pollutant breakdown ...25.2BorderScoutMachine-payable US border-crossing queries over x402. Ranks all 85 US ports of entry by all-in time - the d...25.2FuelScoutMachine-payable cheapest-fuel queries over x402. Station-level prices for Spain, France and Italy and offic...25.2RecallScoutMachine-payable US recall lookups over x402. Given a product, brand, ingredient or vehicle (make/model/year...25.2ScalpStream ResearchMachine-payable, impersonal research feeds over x402: ranked 0-30 DTE options candidates (/picks), dividend...25.21gateway X402 APIThe X402 API from 1gateway — 4 operation(s) for x402.24.1GanjaMon AI A2A AgentAgent2Agent (A2A) protocol surface: an agent card served from https://grokandmon.com/.well-known/agent-card...23.7Grok & Mon REST APIThe JSON REST origin under https://grokandmon.com/api/ that the website, the MCP tools and the ACP endpoint...23.7naifgravity-com X402 APIThe X402 API from naifgravity-com — 4 operation(s) for x402.23.6艾赋 AIFU X402 APIThe x402 API from 艾赋 AIFU — 3 operation(s) for x402.21.3Verse A2A AgentAgent2Agent surface declared by the card at https://api.verse-me.com/.well-known/agent.json (version 2.0.0,...19.6Verse Expertise APIThe REST paths the agent card names on api.verse-me.com, with no OpenAPI behind them: free reads GET /exper...19.6RedotPay Agentic Payments APIProduction RedotPay HTTP API surface behind the redotpay CLI and the redotpay-payment MCP server. Provides ...18.4AgentBazaar APIAgentBazaar API as documented publicly: 16 operations. Contract generated from the documentation by API Eva...15.8
Minimal 1 Almost no public developer surface
APEX on X1 APIAgent-facing API of APEX on the X1 blockchain, served from apexfaucet.xyz: a remote MCP server at /api/mcp ...9.6

Companies reaching this through an API (40)

These companies publish an API, specification or operation carrying “x402” 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.

1gateway 47620-xyz ADEXTO AgentBazaar Agentic Endpoints ai-akari-ai aiagentscity-com AINumbers.co Airbyte AlgoVault Altcoin Chasers HQ Attested Memory Birdeye (Solana data) Browser Use call4me compuute-se Cracked API dnsofmoney-com flexyield-io Horse Truth huggingbay-xyz kairossignal-com MadeOnSol makespdf-com Monid naifgravity-com PaidHandshake Exchange Parley Physical Capability Cloud ProveCart satohub-ai skavio-eu stratalize-com surewhynot-app tektolo-com Telnyx TextForAgents The Retreat Who Represents This Address (RJH Signal Technologies) 艾赋 AIFU

Score breakdown

Frequency
64.9
log-scaled weighted occurrences
Breadth
2.1
spread across providers
Quality lift
52.3
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

A2A 111 co-occurrences A2A Verified 82 co-occurrences x402 Verified 23 co-occurrences Agentic Payments 24 co-occurrences Micropayments 22 co-occurrences Agentic Commerce 51 co-occurrences Trust 19 co-occurrences

Where this tag comes from

Provider tag146
Api tag116
Openapi tag42
Openapi op tag210

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

MarketShare of the market's providers
x402 Micropayments & Agentic Pay-per-Call65%
AI Agents (A2A agent cards)23%

Cohort brief

Auto-generated

The 141 providers in the APIs.io catalog tagged x402, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
141
of 146 in the catalog
Mean Kin Score
45
+22.2 vs catalog 22.8
Mean Agent Readiness
39.3
+26.0 vs catalog 13.3
Spread
9.6–76.8
median 47 · σ 14
How the 141 split by band
Exemplar 7Strong 29Developing 62Thin 26Emerging 15Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 45.9 18.2 +27.7 141
Access Clarity 46.2 25 +21.2 141
Developer Ergonomics 43 22.1 +20.9 141
Contract Governance 27.5 9.4 +18.1 141
Operational Transparency 29.7 12.4 +17.3 141
Discoverability 72.6 57.9 +14.7 141

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) 80% 16% +64
MCP server (first-party) 80% 14% +66
Agent Skills 0% 0% 0
OAuth scopes 16% 13% +3
Security 99% 98% +1
Arazzo workflows 3% 2% +1
Governance rules 87% 35% +52

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 Drippay 76.8
  2. 2 0xArchive 75.7
  3. 3 MandateShield 70.7
  4. 4 Agoragentic 70.1
  5. 5 Delx 69.4
  6. 6 MolTrust 68.2
  7. 7 Hive Civilization 66.5
  8. 8 SCVD General Store 65.9
  9. 9 AnyAPI 64.8
  10. 10 FarmDash Agent Hub 64.5
Top by Agent Readiness
  1. 1 Sirenic 75.6
  2. 2 Emboss 75.2
  3. 3 Agent Ready 74.4
  4. 4 AnyAPI 73.5
  5. 5 invinoveritas 69.1
  6. 6 Ultravioleta DAO 69.1
  7. 7 0xArchive 68.7
  8. 8 Kann KI das? Sponsoring Agent 68
  9. 9 FeedOracle Technologies 67.4
  10. 10 1F916 66.4
All 146 members of this roster resolve to a provider in the catalog; 141 carry a score (97%). The figures above describe the scored members only.Generated from the catalog build of 7 November 2026, across 38912 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/x402"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort (paid plan)
The distribution (Pro)

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