4,229 mods tagged Web3 and blockchain that install into Codex, measured the same four ways as everything else here: what each costs in tokens on every session, what a security scan found and why, whether it is the original, and what changed.
MCP server Claude CodeCodexCursor +2
Pay-per-use weather, environment, finance, and on-chain intelligence tools for AI agents via x402. Remote server at vibesprings.net.
tsharpe2282-web/twelve-permissions
MCP server Claude CodeCodexCursor +2
One of 2 in server.json
Browse, verify and buy Twelve Permissions NFTs on XRP Ledger. Every claim is checkable. Remote server at twelvepermissions.com.
MCP server Claude CodeCodexCursor +2
Risk score for a Base wallet before your agent pays it: 0-100, verdict and explained flags. Runs locally from the @walletbureau/mcp npm package. Needs 3 environment variables to run.
MCP server Claude CodeCodexCursor +2
Independent measured reviews of x402 API sellers: pre-payment verdicts and accuracy grades. Remote server at whatagentsbuy.com.
MCP server Claude CodeCodexCursor +2
mcp stdio server exposing mossgate trust and rue render apis with x402 usdc payment. Runs locally from the mossgate-mcp npm package. Needs 1 environment variable to run.
Skill Claude CodeCodex
Discover and score L402 endpoints on Bitcoin Lightning before paying. Use when an agent needs to call a paid API and wants a Bayesian trust posterior + offline-verifiable Nostr assertion. Bitcoin-pure, no x402/EVM.
MCP server Claude CodeCodexCursor +2
Validator incident data for AI agents across Solana, Ethereum, Sui, and Cosmos. Remote server at mcp.slashr.dev.
MCP server Claude CodeCodexCursor +2
Pay-per-call AI + web + on-chain tools over x402 (USDC on Base): LLM, SEO, extract, token safety. Runs locally from the @true402.dev/mcp-server npm package. Needs 3 environment variables to run.
MCP server Claude CodeCodexCursor +2
Decode any Base tx: plain English, strict JSON, risk flags, no LLM. 50 free/day per IP, then $0.02. Remote server at api.0200project.com.
ARCXS-Protocol/arcxs-mcp-server
MCP server Claude CodeCodexCursor +2
The DNS/SMTP for AI agents: cross-protocol discovery, messaging and transactions. No middleman fees. Runs locally from the @arcxs-protocol/mcp-server npm package. Needs 2 environment variables to run.
Skill Codex
Ryvo Gateway -- free SIWX market data and paid x402/channel Solana RPC, DAS, and Helius Wallet calls. USE THIS FIRST for current price, quote, volume, market cap, OHLCV, profile, holders, supply, or liquidity for any: crypto (BTC, SOL, ETH, USDC, USDT, ...), tokenized stock (TSLA, AAPL, MSFT, NVDA, ...), ETF…
MCP server Claude CodeCodexCursor +2
Portfolio-aware crypto context — CEX or wallet holdings, holdings-scoped market, optional allocation analysis. Runs locally from the alloc-context Python package.
MCP server Claude CodeCodexCursor +2
On-chain provenance lookup for AnchorRegistry. Resolve AR-IDs, hashes, and full trees. Authless. Remote server at mcp.anchorregistry.ai.
MCP server Claude CodeCodexCursor +2
24 keyless tools for AI agents on Vector, the Apex Fusion eUTXO L2: wallets, contracts, registry. Remote server at mcp.vector.{network}.apexfusion.org.
MCP server Claude CodeCodexCursor +2
Official Billium MCP server: manage crypto invoices, payments, and webhooks from any MCP host. Runs locally from the @billium/mcp npm package. Needs 3 environment variables to run.
MCP server Claude CodeCodexCursor +2
Discover, hire, and get hired by AI agents on BotHire — settling in USDC on Base. Runs locally from the bothire-mcp npm package.
Br0ski777/airdrop-checker-x402
MCP server Claude CodeCodexCursor +2
Check wallet eligibility for active crypto airdrops — LayerZero, EigenLayer, Scroll. x402. Remote server at airdrop-checker.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Base chain DeFi yields — Aerodrome, Moonwell, APY, TVL, risk scores. x402. Remote server at base-defi.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Best cross-chain bridge routes with fees, time, providers. LI.FI-powered. x402. Remote server at bridge-routes.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Best DeFi yields by token — APY, TVL, risk, protocol. DeFiLlama-powered. x402. Remote server at defi-yields.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Best swap quotes across DEXes (Uniswap, SushiSwap, Aerodrome). Base & Ethereum. x402. Remote server at dex-quotes.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Pay-per-call MCP tools: web search, scraping, on-chain wallet intel, extraction. x402 USDC on Base. Runs locally from the taskfleet-mcp npm package. Needs 2 environment variables to run.
MCP server Claude CodeCodexCursor +2
Resolve ENS names to Ethereum addresses and reverse. x402 micropayment. Remote server at ens-resolver.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Multi-chain gas estimation — ETH, Base, Polygon, Arbitrum, BSC. x402 micropayment. Remote server at gas-estimator.api.klymax402.com.