402x402Hub

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

200
Tracked services
150
Verified
78
Median Trust
0
Free services

Top 20 by Trust Score

#1

Exa

api✓ verified

Exa /search endpoint

· base· paid· $0.007
A+97
#2

Otto AI

api✓ verified

Real-time crypto market news with sentiment analysis and top headlines ranked by importance.

· base· paid· $0.001
A+95
#3

BlockRun.AI

api✓ verified

Query Polymarket markets with filtering, sorting, and pagination

· base· paid· $0.001
A+95
#4

BlockRun.AI

api✓ verified

Project mindshare time series.

· base· paid· $0.0075
A+94
#5

Otto AI

api✓ verified

Hyperliquid perpetuals market data: live mark/oracle price, funding rate, open interest, max leverage, and size specs for any tradable asset.

· base· paid· $0.001
A+93
#6

BlockRun.AI

api✓ verified

Query Kalshi markets with filtering, sorting, and pagination

· base· paid· $0.001
A+93
#7

Otto AI

api✓ verified

TradFi macro intelligence: indices, VIX, DXY, treasury yields, commodities, and individual stock quotes with moving average context.

· base· paid· $0.001
A+92
#8

Otto AI

api✓ verified

Cross-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.)

· base· paid· $0.001
A+91
#9

Otto AI

api✓ verified

Premium alpha from top 50 crypto KOLs. Real trading signals, trending token picks, and sentiment from influencers who move markets.

· base· paid· $0.001
A+91
#10

Otto AI

api✓ verified

Top 3 hottest altcoins traders may want to ape into, based on news and Twitter analysis. DYOR.

· base· paid· $0.001
A+91
#11

Otto AI

api✓ verified

DeFi 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.

· base· paid· $0.001
A+91
#12

Otto AI

api✓ verified

Where 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.

· base· paid· $0.001
A+90
#13

Exa

api✓ verified

Exa /contents endpoint

· base· paid· $0.001
A+90
#14

Otto AI

api✓ verified

Best DeFi yield opportunities across stablecoins, ETH, and BTC with risk ratings and APY comparisons.

· base· paid· $0.001
A+90
#15

BlockRun.AI

api✓ verified

Neural and keyword web search. Optional category filter: company, research paper, news, pdf, github, tweet, personal site, linkedin profile, financial report.

· base· paid· $0.01
A+90
#16

Nansen

api✓ verified

Get "Token God Mode" (TGM) who bought/sold data

· base· paid· $0.01
A+90
#17

CuseTheJuice Agent Email

api✓ verified

CuseTheJuice 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

· base· paid· $0.01
A89
#18

x402.tavily.com

api✓ verified

Tavily Search - advanced mode

· base· paid· $0.01
A89
#19

x402.twit.sh

api✓ verified

Search 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.

· base· paid· $0.006
A89
#20

stableenrich.dev

api✓ verified

Exa Search - Neural search across the web

· base· paid· $0.01
A89

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.

Want more than read-only?

Get notified when reviews, provider dashboards, and the agent MCP server launch. No spam.

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.