Trust Board for x402 API & MCP Services
x402Hub is a directory that independently verifies x402 API and MCP services and ranks them by a neutral, algorithmic Trust Score. Find and compare tools for AI agents by trust, price, and network. Data is sourced from Coinbase Bazaar and refreshed hourly.
Last updated: 2026-07-08
Top 20 by Trust Score
Exa
api✓ verifiedExa /search endpoint
Otto AI
api✓ verifiedReal-time crypto market news with sentiment analysis and top headlines ranked by importance.
BlockRun.AI
api✓ verifiedQuery Polymarket markets with filtering, sorting, and pagination
BlockRun.AI
api✓ verifiedProject mindshare time series.
Otto AI
api✓ verifiedHyperliquid perpetuals market data: live mark/oracle price, funding rate, open interest, max leverage, and size specs for any tradable asset.
BlockRun.AI
api✓ verifiedQuery Kalshi markets with filtering, sorting, and pagination
Otto AI
api✓ verifiedTradFi macro intelligence: indices, VIX, DXY, treasury yields, commodities, and individual stock quotes with moving average context.
Otto AI
api✓ verifiedCross-venue funding-rate arbitrage + crowded-positioning radar: live perp funding rates, open interest, global & top-trader long/short ratios, whale positions, and liquidations across Binance, OKX, Bybit, Hyperliquid, and more. Omit symbol for the whole-market overview; pass one (e.g. BTC) for the per-exchange breakdown. (Hyperliquid-only perp data: use hyperliquid-market.)
Otto AI
api✓ verifiedPremium alpha from top 50 crypto KOLs. Real trading signals, trending token picks, and sentiment from influencers who move markets.
Otto AI
api✓ verifiedTop 3 hottest altcoins traders may want to ape into, based on news and Twitter analysis. DYOR.
Otto AI
api✓ verifiedDeFi yield farming markets with live APYs across Aave V3 and Morpho on Base, Ethereum, and other major chains. Find the best stablecoin yield (USDC) and ETH yield for idle capital: returns supply APY, TVL, and vault/market addresses per token, filterable by protocol, chain, or token symbol. Compare DeFi yield rates across lending markets and vaults before depositing.
Otto AI
api✓ verifiedWhere DeFi capital is flowing — TVL rankings, fastest-growing vs bleeding protocols, chain-by-chain breakdown, and per-protocol deep dives. Track capital rotation and protocol health. Powered by DefiLlama.
Exa
api✓ verifiedExa /contents endpoint
Otto AI
api✓ verifiedBest DeFi yield opportunities across stablecoins, ETH, and BTC with risk ratings and APY comparisons.
BlockRun.AI
api✓ verifiedNeural and keyword web search. Optional category filter: company, research paper, news, pdf, github, tweet, personal site, linkedin profile, financial report.
Nansen
api✓ verifiedGet "Token God Mode" (TGM) who bought/sold data
CuseTheJuice Agent Email
api✓ verifiedCuseTheJuice agent email on Base USDC: create accounts, list and read email, send, reply, search, folders, attachments, trust index, password recovery, custom domains, and domain admin. Pay with x402 (Base USDC). HTTP shape: extensions.bazaar on the 402. Catalog: https://mail.cusethejuice.com/machine-mail.html
x402.tavily.com
api✓ verifiedTavily Search - advanced mode
x402.twit.sh
api✓ verifiedSearch Twitter/X tweets with advanced filters. Returns up to 20 tweets per page, most recent first, with pagination. At least one filter required. Params: words, phrase, anyWords, noneWords, hashtags, from, to, mentioning, minReplies, minLikes, minReposts, since (YYYY-MM-DD), until, next_token. e.g. GET /tweets/search?words=bitcoin&from=elonmusk&minLikes=100. Returns X v2 API-compatible JSON.
stableenrich.dev
api✓ verifiedExa Search - Neural search across the web
For AI agents
Query x402Hub directly. Search services by Trust Score, price, verification, and network — filters Coinbase Bazaar does not offer.
- MCP server (recommended)
- https://x402.chain-ops.xyz/mcp
- Streamable HTTP · tool: search_services
- REST Discovery API
- https://x402.chain-ops.xyz/api/discovery/search
Free · rate limit 60 requests/min per IP.
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Frequently asked questions
What is x402?
x402 is an open payment protocol that uses HTTP 402 (Payment Required) to let AI agents pay for APIs with stablecoins (USDC) — no API keys or subscriptions. It is led by Coinbase and governed by the Linux Foundation x402 Foundation.
How is the x402Hub Trust Score calculated?
The x402Hub Trust Score is not based on user reviews. It is an algorithmic score combining our own verification (HTTPS, live x402 protocol check), real usage, recency, and metadata completeness. Missing signals are excluded and the rest renormalized, producing a 0–100 score with an A+ to F grade.
How is x402Hub different from Coinbase Bazaar?
Bazaar lists x402 services but does not expose a trust metric. x402Hub independently verifies each service, assigns a neutral Trust Score, and lets you filter by trust, price, and network.
Can AI agents query x402Hub directly?
Yes. x402Hub exposes an MCP server at https://x402.chain-ops.xyz/mcp (Streamable HTTP) with a search_services tool, plus a REST Discovery API (https://x402.chain-ops.xyz/api/discovery/search) that returns JSON filtered by capability, minimum Trust Score, max price, and network. Both are free, rate-limited to 60 requests per minute per IP.