x402; USDC on Base·verified 2026-09-04
An AI-native service marketplace and payment gateway where agents discover, route, and pay per call for LLM inference, data, and MCP tools in USDC via x402. Ranks #1 by call volume and unique buyers on the Agent402 leaderboard; other trackers (e.g. x402.fuchss.app) rank sellers by settled USD instead and currently place other endpoints higher on that measure, so 'highest-volume' claims should be read as tracker- and metric-specific, not universal.
- Example products
- LLM inference routing
- Pay-per-use data access
- MCP tools
x402 SDK + facilitator; USDC; EVM + Solana·verified 2026-09-04
x402 payment infrastructure (SDK and facilitator) for autonomous AI agents, enabling pay-per-call APIs across EVM chains and Solana without accounts. Also operates as a settlement facilitator.
- Example products
- Pay-per-call APIs
- x402 SDK (@relai-fi/x402)
x402; USDC on Base; MCP (api.bitrefill.com/mcp)·verified 2026-09-04
Established crypto gift-card and mobile top-up retailer that added an x402-payable checkout so AI agents can buy gift cards, mobile top-ups, and travel eSIMs directly in USDC on Base, alongside its existing MCP server for account holders. Distinct company from Cryptorefills (a competing retailer with its own separate x402 integration, also proposed below).
- Example products
- Gift cards
- Mobile top-ups
- Travel eSIMs
x402; USDC; Base, Arbitrum, Solana·verified 2026-09-04
An AI due-diligence and research platform selling 45 pay-per-call endpoints (equities/RWA screening, crypto contract audits, wallet risk, SEO/content, DeFi intelligence) for USDC in the $0.01-$0.19 range per call via x402, with no account or API key required. The product site (swarmx.io) links its own GitHub repo (SolTwizzy/swarms-x402) as the official source, so the site and repo are the same project, not two separate entities.
- Example products
- Stock/RWA due diligence
- Crypto contract audits
- Wallet risk analysis
- DeFi intelligence feeds
x402; USDC on Base; auto-published to Model Context Protocol registry·verified 2026-09-04
A UK-based x402 API marketplace where domain experts list specialist data endpoints (property, companies, weather, vehicles, finance) without writing payment code, and AI agents discover and pay per request in USDC on Base via x402, auto-published to the MCP registry for direct use in Claude Desktop, Cursor, and LangChain agents. Distinct from other x402 API marketplaces already tracked (Agent Bazaar, SwarmX, x402 Bazaar) by its UK specialist-data focus and providers keeping the full request fee.
- Example products
- UK Data API
- UK HMO Licence lookup (124,715 records)
- Company enrichment API
- SEC EDGAR filings API
x402; USDC on Base; Coinbase facilitator·verified 2026-09-04
A pay-per-call API service for AI agents (web scraping, markdown/PDF extraction, crypto and DeFi market data, LLM chat/embeddings, agent key-value memory, and a task-bounty endpoint), billed $0.002-$0.02 per request in USDC on Base via x402 with Coinbase as facilitator, no signup or API key required. Independently listed and metered on x402-list.com's service directory, which is a different verification path than the vendor's own site.
- Example products
- /scrape web scraping
- /markdown page-to-markdown conversion
- /crypto market price data
- /v1/chat/completions
x402; USDC; routes discoverable via Agentic.Market and the x402 Bazaar·verified 2026-09-04
Established US stock-market data provider that added an x402-payable route (agent.massive.com) so AI agents can buy price history, snapshots, technical indicators, news, SEC filings, and ticker reference data one request at a time, in USDC, with no API key or account.
- Example products
- US stock price history and snapshots
- Technical indicators
- SEC filings
- Company news and reference data
x402 via the agentcash MCP; USDC on Base, Solana, or Tempo·verified 2026-09-04
Merit Systems' pay-per-request B2B data-enrichment aggregator for AI agents and GTM/BD teams: it fronts Exa, Firecrawl, Clado, Google Maps, FullEnrich, CompanyEnrich, LeadMagic, and Minerva behind a single x402 interface, billed in USDC per call instead of a ZoomInfo/Apollo-style seat subscription. Distinct from the already-tracked SolEnrich (Solana wallet/token risk enrichment): StableEnrich targets company and contact enrichment across multiple chains.
- Example products
- Company/contact enrichment (FullEnrich, CompanyEnrich, LeadMagic)
- Web search (Exa)
- Web scraping (Firecrawl)
- LinkedIn profile data (Minerva)
x402; USDC on Base mainnet; 85/15 provider revenue split·verified 2026-09-04
ForgeMesh Labs sells a bundle of pay-per-call x402 APIs for AI agents: a public-domain book library with retrieval Q&A (ForgeMesh Library), an SEO domain-authority API, a message board (BotBoard), a vehicle intelligence pack (VIN decode/recalls), a government-transparency pack (congressional trades/lobbying), and a crypto market-intelligence feed (Kronos), with earnings split non-custodially to providers.
- Example products
- ForgeMesh Library (61,000+ public-domain books, retrieval Q&A)
- SEO Authority API
- Vehicle Intelligence Pack (VIN decode and recalls)
- Gov-Transparency Pack (congressional trades and lobbying data)
x402; USDC on Base (some Solana); sub-1s settlement·verified 2026-09-04
Pay-per-query financial and macro data platform for traders and AI agents: dozens of live endpoints across several marketplaces (crypto, commodities, equities, congressional trading, funding rates, cross-asset risk), no subscriptions, no API keys. A status page and MCP directory listing confirm it is live; endpoint counts vary across the vendor's own channels (39, 49, and 69+ have all been cited).
- Example products
- TokenScope token analysis
- CapitolFlow congressional stock trades
- FundingRates perp futures data
- EquityScope stock fundamentals with AI signals
x402; USDC on Base·verified 2026-09-04
Web-scraping and automation platform that made its marketplace of more than 20,000 Actors (pre-built automation/scraping tools) payable via x402: agents call an Actor's API endpoint, receive a 402 with payment terms, sign a USDC payment on Base, and the Actor runs, without a pre-provisioned API key.
- Example products
- Web scraping Actors
- Web automation tool marketplace (20,000+ Actors)
USDC on Base; x402; MCP tools·verified 2026-08-03
An open service marketplace for AI agents, live on Base mainnet, where agents buy data APIs, automated services, and human-delivered work, escrow-protected and paid in USDC via x402. As of August 2026 the site displays a banner stating it has temporarily paused new activity; the underlying platform (escrow, discovery, agent/provider guides) remains reachable and browsable.
- Example products
- Data APIs
- Automated services
- Human-delivered work
x402; on-chain USDC volume ranking·verified 2026-08-03
A neutral x402 index, smart order router, and leaderboard for the agent-payments economy, ranked by real on-chain USDC volume and auto-crawled from the Coinbase Bazaar. An index/router, not a seller itself.
- Example products
- x402 service index
- Smart order router
- On-chain volume leaderboard
Solana; dual-protocol settlement: USDC via x402, or credit card via MPP/Stripe·verified 2026-08-03
On-chain data enrichment service for Solana providing wallet profiling, token risk scoring, and DeFi position tracking using x402 micropayments.
- Example products
- Wallet profiling
- Token risk scoring
x402; USDC on Base (EIP-155 chain 8453)·verified 2026-08-03
A crypto-payments gift-card and top-up retailer (a Bitrefill competitor, separate company) that launched a dedicated x402 checkout endpoint letting AI agents buy gift cards across 10,000+ brands, mobile top-ups, and eSIMs in USDC on Base without a human checkout flow.
- Example products
- Gift cards (10,000+ brands, 180 countries)
- Mobile top-ups
- eSIMs
x402; USDC on Base; GitHub Apps; PayPal fallback for human buyers·verified 2026-08-03
A GitHub-native marketplace that turns any GitHub org into a storefront for AI agent skills: sellers publish a SKILL.md with pricing, and buyers pay via x402 (USDC on Base) or PayPal for instant, scoped access. The agent-facing buyer app ("Shopkeeper") is still listed as coming soon, so only the seller side is confirmed live.
- Example products
- SKILL.md-defined agent skills
- GitHub App seller storefront
x402; USDC·verified 2026-08-03
A pay-per-use marketplace of APIs, CLI tools, and agent skills (34+ listed) where agents autonomously discover and pay per call in USDC via x402. Distinct from Coinbase's official x402 Bazaar discovery layer and from Agentic.Market despite the similarly "bazaar/market" naming.
- Example products
- Code review skill
- Image generation skill
- Web search skill
x402; Coinbase Payments; USDC; CDP x402 SDK·verified 2026-08-03
Coinbase Business rolled out merchant-side x402 payment acceptance: existing Coinbase Business customers can receive USDC payments from AI agents with no extra setup, alongside a new CDP x402 SDK for adding agent-payable checkout to any API, MCP server, or web service in three lines of code. An infrastructure rail for merchants, not a storefront itself.
- Example products
- Merchant agent-payment acceptance
- CDP x402 SDK
unknown·verified 2026-07-05
DeFi intelligence API offering 28 endpoints for trader analytics, LP strategy, and smart-money data via x402 pay-per-call payments.
- Example products
- Trader analytics
- LP strategy
unknown·verified 2026-07-05
Execution control plane for governed AI agents enabling custody-free, policy-gated DeFi transactions and yield optimization.
- Example products
- DeFi transactions
- Yield optimization
unknown·verified 2026-07-05
Provides AI services including image and video generation on a pay-per-use basis via the x402 protocol.
- Example products
- Image generation
- Video generation
unknown·verified 2026-07-05
An autonomous agent marketplace for discovering, hiring, and settling payments between AI agents using x402.
- Example products
- Agent hiring
- Service discovery
Coinbase x402 facilitator; USDC on Base·verified 2026-07-03
A Coinbase Developer Platform marketplace that lets developers turn APIs into agent-payable storefronts discoverable and payable through x402.
- Example products
- Agent-payable APIs
- MCP tools
x402 facilitator; nvm:erc4337 (smart-account crypto) + nvm:card-delegation (fiat/card)·verified 2026-07-03
A payments protocol and hosted x402 facilitator letting agents pay per request for premium data, compute, and APIs, with programmable schemes for both crypto and card settlement.
- Example products
- Data feeds
- Compute resources
- API access
Coinbase x402 discovery API; open Bazaar spec·verified 2026-07-03
The official x402 discovery layer (Coinbase Developer Platform): a machine-readable search index of payable API endpoints and MCP tools, auto-crawled from /.well-known/x402 manifests. It is the canonical marketplace/index, not a seller itself.
- Example products
- Payable API endpoints
- MCP tools
x402 + MCP; USDC·verified 2026-07-03
Pay-per-use residential and mobile proxies for AI agents, billed per request in USDC via x402 with MCP integration and no account required.
- Example products
- Residential/mobile proxies
- Scraping and automation APIs
x402; wallet auth; Base·verified 2026-07-03
Privacy-first AI platform where agents and users authenticate and pay per request with an Ethereum wallet via x402 instead of traditional API keys, covering text generation, web tools, and blockchain RPC.
- Example products
- Text generation
- Web tools
- Blockchain RPC
Coinbase x402; USDC on Base·verified 2026-07-03
Freepik’s creative AI image-generation API is payable in USDC on Base via x402, so agents can generate and receive images in a single request without an API key.
- Example products
- AI image generation (/v1/x402/ai/mystic)
IoTeX L1; USDC; official coinbase/x402 network support·verified 2026-07-03
Network-level x402 support for DePIN: agents outsourcing data requests can settle in USDC on the IoTeX L1. A protocol/network integration, not a specific storefront (the originally-cited “Data Gateway” node and its placeholder identity were unverifiable and removed).
- Example products
- DePIN data-request settlement (USDC on IoTeX L1)
peaq; ERC-3009; peaqnetwork/x402-peaq·verified 2026-07-03
Native x402 support on the peaq network: machines with on-chain identities authorise ERC-3009 payments to access APIs. A network integration, not a specific storefront (the originally-cited “M2M Data Market” specifics and placeholder did:peaq identity were unverifiable and removed).
- Example products
- Machine-paid API access (ERC-3009 on peaq)
@dexterai/x402 SDK; dexter-x402-sdk; facilitator·verified 2026-07-03
Developer tooling and a full-stack x402 SDK (@dexterai/x402) that lets teams monetise API endpoints for autonomous agents. Also operates as a settlement facilitator.
- Example products
- dexter-x402-sdk
- API-monetisation tooling
AWS Bedrock AgentCore (GA as of 2026-08-18); x402 v1 + v2; Machine Payment Protocol (MPP); ProcessPayment API·verified 2026-07-03
A managed x402 payment orchestrator on AWS that handles the full 402 lifecycle (x402 v1 and v2) for agents via a ProcessPayment API. Reached general availability on 2026-08-18 (previously preview), adding support for the Machine Payment Protocol (MPP) alongside x402. Infrastructure rail that powers pay-per-call marketplaces, not itself a storefront.
- Example products
- ProcessPayment API
- AgentCore payments plugin
x402 Cloud; native x402 settlement·verified 2026-07-03
A platform for deploying payment-gated API endpoints with native x402 settlement, launched on “4/02 Day” as the x402 protocol joined the Linux Foundation.
- Example products
- Payment-gated API endpoints
- x402 Cloud deployment
