Kristo Intelligence — AI-powered DeFi trading signals API on Base. x402 pay-per-call (.05 USDC) + /mo VIP. Machine-readable discovery: x402.json, OpenAPI, MCP, llms.txt. No API keys — the HTTP 402 IS the checkout.
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Buy shipping labels across carriers in two paid API calls—rate-shop, purchase, and receive base64 PDFs instantly.
x402 (HTTP 402 Payment Required) SDK + MCP server: let any API charge for itself and any AI agent pay for itself, USDC & stablecoins across EVM, Solana & 8 more chain families, in a couple of lines. Backendless, no fee, self-custodial, paid straight to your wallet. TypeScript, MIT.
MCP server for GAUGE — verifiable, screening-level signals (environment, agriculture, power grid, shipping, SEC filings) for AI agents. Pay-per-call in USDC on Base via x402, no API key.
Public metadata and connection docs for the Ausca MCP server. Pay-per-call APIs and MCP services for agents.
Remote MCP server — 28+ pay-per-call x402 tools for AI agents (web, research, compliance, security). USDC on Base, no API keys, first call free.
Official code samples for GetXAPI: Twitter / X data API. curl, Python, Node.js, Go, Rust examples for the 69 endpoints. From $0.001 per call. docs.getxapi.com
Autonomous agent pay-per-call x402 demo: pay USDC on Base via EIP-3009, get LLM response. Works with PayAI facilitator.
Saymon RU Data API — Russian-language data endpoints for AI agents: EGRUL/INN company check, Cyrillic search, research, Russian Post tracking. Pay-per-call via x402 in USDC (Base). 🌏 EN/中文/日本語/한국어
MCP server for AI agent payments: pay-per-call APIs (search, scraping, data, compute, media, research) with no vendor keys and a spend ceiling on every call. Works in Cursor, Claude Code, Claude Desktop, and Codex.
NanoTools — 44 pay-per-call x402 tools for AI agents (Base mainnet): Google Trends, SERP, SEO audits, headless Chromium screenshots/PDF, OG images. $0.001-$0.03 USDC per call, no signup.
7 x402 pay-per-call tools for AI agents (markdown, DEX, weather, FX, Wikipedia, HN)
Agent-native x402 API platform — Automation, Data, Research, AI & Optimization/Quantum. Pay per call in USDC on Base, no API keys.
Sell JSON-RPC access to your own Ethereum node, one request at a time, over x402. No accounts, no API keys — callers pay in USDC on Base. Cloudflare Worker.
205 pay-per-call MCP tools via x402 — no API keys. Stocks, crypto/DeFi, macro data, on-chain analytics, weather, government data, and 200+ more. USDC on Base.
Web search and URL→markdown for AI agents. Paid per call in USDC on Base via x402 — no signup, no API key, never charged unless served.
Suede x402 Media API: pay-per-call music, video, and image generation for AI agents. Three public endpoints: POST /create-music, POST /agent/video, POST /agent/image. Settled in USDC on Base, no API key.
Auth-and-capture for AI API calls, settled on-chain. Escrow the worst case before the call, charge actual token usage, refund the rest.
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