MCP servers for Grok Build

Test any x402 paid URL without paying: 402, PAYMENT-REQUIRED, USDC, amounts, payTo, EIP-712, CORS.

Ethereum mainnet JSON-RPC paid per call in USDC on Base. No account, no API key: the wallet pays.

Pre-payment merchant trust checks for x402 agents on Base and Solana.

Paid x402 help: debug 402 errors, review MCP manifests, rewrite Bazaar listings. USDC on Base.

Pay-per-call NLP & embeddings APIs on Base via x402. No keys/signup; agents pay per call in USDC.

77 pay-per-call x402 tools for AI trading & on-chain agents: prices, sniping, perps, RH Chain, MEV

Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.

Public demo: evaluate AI-agent payment authorization and approval policy. No signing, no settlement.

Pay-per-use tool API for AI agents. Free tier, x402 USDC micropayments, or API key.

Inspect and drive Avalonia, WPF, WinUI, and .NET MAUI apps through MCP.

MCP tools for testing mobile and TV apps on iOS simulators, Android phones, and Apple/Android TV.

Public Streamable HTTP MCP gateway for XGRChain, XDaLa sessions, Explorer data and XGR standards.

Read-only public X (Twitter) data: profiles, tweets, threads, followers, search. Pay per result.

Wallet and payments for AI agents: auto-pay x402 APIs in USDC on XDC, within on-chain limits.

Reputation-ranked analyst earnings estimates. Pay per call via x402 on Base.

XDG desktop entry keys, body discarded

27 live market-research tools for trading agents: scans, options flow, sentiment, valuation, alerts

SEO, AEO and GEO audits, rank tracking, AI-citation scans and WordPress editing for any site.

XFA's remote MCP server — query device posture, compliance, policies & CVEs. Read-only.

Financial intelligence for AI agents: market events, sentiment, technicals, news feed.

XFish.hu Hungarian fishing tackle webshop. Search 90,000+ products by category, brand, price.