#x402

Run402

MajorTal

MCP server for Run402 — AI-native Postgres + REST + auth + storage + static sites. Pay with x402 USDC on Base. No signups.

APIbase — The API Hub for AI Agents

whiteknightonhorse

Universal MCP gateway for AI agents — 1108 tools, 307 providers. One endpoint (https://apibase.pro/mcp), pay-per-call with x402 USDC on Base + MPP USDC on Tempo.

Apimesh

mbeato

APIMesh — 23 pay-per-call web analysis APIs + 16-tool MCP server with autonomous API generation. Security audits, SEO, tech stack detection. x402 + Stripe MPP payments.

Payflow

chainbound

A toolkit for building micropayment-gated MCP servers

Agirails MCP Server

agirails

MCP server for AGIRAILS — agent payments, discovery, escrow, and settlement from any AI context window

Orbis Travel Mcp

OrbisAPI

500+ travel APIs for AI agents — flights, hotels, destinations. Pay per call with USDC via x402.

Storyflo

Alisammour

Official Storyflo MCP server — install + discovery reference. The Storyflo platform is proprietary; this repo is the public agent integration surface.

x402search — Pay-Per-Search API Discovery for AI Agents

x402-index

Search 13,000+ x402-enabled APIs from your AI agent. Powered by x402search.xyz

Pqs Prompt Quality Score

OnChainAIIntel

The world's first named AI prompt quality score. Score any LLM prompt before it hits any model — returns grade (A-F), score out of 40, percentile, and dimension breakdown across 8 quality dimensions.

Gatefare — paid-API marketplace

gatefareio

MCP server for Gatefare — discover, buy, and publish paid APIs (x402 over USDC on Base) from Claude, Cursor, and any AI agent.

Madeonsol — Solana Kol & Memecoin Intelligence

LamboPoewert

MCP server for MadeOnSol Solana KOL intelligence — use from Claude, Cursor, or any MCP client

Code Quality Scanner

luxemarasound-stack

x402 on demand micro services

GoldBean - Baidu AI API Marketplace with x402 Micropayments

wuzenghai616-lang

Baidu AI for AI agents — OCR, TTS, LLM. 47 endpoints (26 paid + 21 free). No API key. Pay per call with USDC.

X402mail - Email API with crypto micropayments

MuzsaiLajos

Python SDK for x402mail - send and receive email with USDC micropayments

Xenarch — X402 Mcp Server For Ai Agent Payments

xenarch-ai

x402 MCP server for AI agent payments. Gasless USDC micropayments on Base L2. Claude, Cursor, LangChain, CrewAI, AutoGen, LangGraph resolve HTTP 402 with no API keys. Non-custodial, settlement-provider-agnostic, 0% fee.

PincerPay

ds1

On-chain USDC payment gateway for AI agents. x402 protocol.

NodusAI MCP Server — Prediction Market Signals

NodusAI-Your-Prediction-Broker

AI-Powered Signals for Prediction Markets — accessible to any AI agent via MCP.

Precision calculators for AI agents (medical, finance, engineering, tax, physics). Pay-per-call in USDC via x402 on Base. No API keys.

Stripe for AI agents. Pay any HTTP API in stablecoins or native tokens on Polygon and Solana mainnet with one MCP call. Non-custodial, on-chain settlement, atomic 99/1 partner split. Five tools: payable_fetch, agent_address, agent_quote, pay_with_split, quote_split.

Agentbodega Mcp

agentbodegastore

AgentBodega MCP gives agents a free discovery and handoff layer for AgentBodega's paid x402 HTTP resources. Agents can search available services, compare endpoint prices, inspect accepted and required inputs, review output examples, and generate curl/JavaScript call snippets. Pai

Piprail

piprail

Hand any AI agent a budget-capped wallet to pay, discover & register x402 payment-gated URLs across every chain. Local, self-custodial, no backend, no fee.

Orbis Research Mcp

OrbisAPI

Access 8,000+ web research and data extraction APIs through a single MCP. Search the web, scrape content, query Reddit, pull Google results, extract structured data, and more. Pay-per-call in USDC via x402 on Base — no API keys, no subscriptions.

Verifiable document intelligence for AI agents. Extract, summarize, translate, claim-check, and notarize PDFs & URLs. Evidence bundles with cryptographic proofs and on-chain attestation. 20 MCP tools.

Agent402

MikeyPetrillo

Open-source MCP server with ~1,100 deterministic tools — web search, headless Chromium, PDFs, OCR, images, ~1,040 CPU utilities. Free to self-host or pay per call via x402 (USDC on Base).

Pay-per-call x402 data APIs for AI agents, exposed over MCP. Multi-source web search (Hacker News + GitHub + Stack Overflow + Wikipedia in one call), multi-chain on-chain reads (balance, gas, tx across Base/Ethereum/Optimism/Arbitrum/Polygon), token rug-check, live DEX data, and

X402 Trust Scores

JonasFuchss

x402-trust gives AI agents a "check before you pay" layer for the x402 ecosystem.

DeskCrew

webmilmind1

Agent-native helpdesk. AI agents operate a support desk over MCP and **pay per action in USDC via x402** (HTTP 402) — no account, no API key. Reads (KB/changelog search) are free; write/AI tools are **$0.02–$0.06** per call, settled across Base, Polygon, Avalanche, Sei, and Solan

Professional-grade crypto market intelligence for AI agents. Real-time regime detection, funding rates, liquidation zones, technical signals, and smart contract auditing. Pay-per-use via x402 — no API keys, no subscriptions.

402.bot Discovery Oracle

sam00101011

Read-only remote MCP server for discovering live agent APIs, searching ranked endpoints by capability and network, and inspecting trust and x402 payment telemetry.

Apiosk MCP

obcraft

Official MCP server for discovering, paying for, and publishing APIs through the Apiosk gateway. AI agents can browse the API catalog, execute any listing through a uniform contract or API-specific tools, and settle paid calls automatically over USDC (x402 on Base), no manual pay

Universal product search across 40+ stores (Amazon 22 countries, eBay 22 countries, Awin 15k merchants, AliExpress, SaaS, B2B) — 52 languages, x402 micropayments.

9 autonomous crypto intelligence tools paid via x402 USDC on Base. Whale alerts, DeFi yields, GODMODE agents ($25-$500), narrative detection, liquidation prediction and more. Any AI agent can discover and pay autonomously.

MarketNow — Trust Layer for Agent Commerce (MCP Marketplace)

edgarfloresguerra2011-a11y

The trust layer for agent commerce. 8,560 MCP-compatible skills with Sentinel L2 security audits, x402 payments (HTTP 402 + USDC on Base), and AP2 delegated mandates with human-in-the-loop by default.

Free AI research/OCR + agent-economy discovery tools (120+ tools, no-auth), includes engage_sasame to commission SaSame to build MCP/Claude/RAG/agents, full deliverables pay-per-call via x402

UK government data intelligence platform. 14 enriched endpoints with proprietary scoring across company, location, property, environmental, market, trade, education, transport, vehicle, health, energy, legal, and procurement data from 400+ official UK sources.

Email Finder X402

Br0ski777

Find professional email addresses from name + company domain. Tests 15+ patterns against MX records with confidence scoring. -- x402 micropayment API + MCP server for AI agents

Airdrop Checker X402

Br0ski777

Check wallet eligibility for active crypto airdrops -- token, value, deadline, claim URL via Etherscan. -- x402 micropayment API + MCP server for AI agents

Agentictrade

JudyaiLab

AI agent API marketplace — discover, call, and pay for services with USDC. 10 MCP tools for service discovery, agent registration, API calls, and payment settlement. 23 active services from independent providers.

x402 micropayment API for AI agents. Generates regex patterns from descriptions. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Fact-check claims by searching multiple web sources. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Extract text from images using OCR. Supports URL or base64 input. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Evaluates password strength and security. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Monitors Solana liquidity pools. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Validates and formats phone numbers. Pay per call with USDC on Base.

fomox402 broker + MCP server for last-bidder-wins games on Solana. Drop one URL into Claude / Cursor / Goose / Cline and the agent auto-registers a Privy-managed Solana wallet (faucet-funded with ~0.0024 SOL + $fomox402), bids via x402 micropayments, claims dividends, and plays a

x402 micropayment API for AI agents. Tracks perpetual futures funding rates. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Fetches Hyperliquid exchange market data. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Detects the language of any text. Pay per call with USDC on Base.

Korean crypto market data + AI analysis for trading agents. 7 tools: AI market read ($0.10, 9 data sources + Claude AI signal), Kimchi Premium, stablecoin premium, Upbit/Bithumb prices, USD/KRW FX rate. Pay-per-use via x402 on Base/Solana.

x402 micropayment API for AI agents. In-memory vector store with cosine similarity search. For RAG pipelines. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Generate QR codes from text or URL. Returns base64 PNG. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Tracks new token launches on Solana. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Analyzes text sentiment and emotions. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Takes website screenshots and converts to PDF. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Tracks whale activity on Hyperliquid. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Validates postal addresses worldwide. Pay per call with USDC on Base.

x402 micropayment API for AI agents. Domain WHOIS and intelligence lookup. Pay per call with USDC on Base.

MCP server for generating cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512, RIPEMD-160). Pay-per-use via x402 protocol (USDC on Base). Use this when you need to hash strings, verify data integrity, or generate checksums.

Satring

toadlyBroodle

The best curated L402 + x402 API directory. Find, rate, and connect to paid APIs via Lightning (L402) or USDC on Base (x402). Discover 200+ reviewed, verified, paid, and live services, curated and tested via https://satring.com