4,223 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
Tamper-evident attestation tools for AI agents — on-chain receipts on Hedera Hashgraph mainnet. Runs locally from the @cryptair/mcp-server npm package. Needs 3 environment variables to run.
MCP server Claude CodeCodexCursor +2
Sell to people and AI agents: create products, a storefront, and USDC payment links from chat. Remote server at mcp.swopme.co.
MCP server Claude CodeCodexCursor +2
Fixed-fee P2P term loans (no oracles) and flash loans on Ethereum, Base, Arbitrum and Sepolia. Runs locally from the @flashbank/mcp npm package. Needs 3 environment variables to run.
Skill Claude CodeCodex
An OpenClaw skill that lets AI agents discover, publish, and pay for tools using testnet USDC on Base Sepolia. Think "app store for agent tools" with on-chain payment settlement.
MCP server Claude CodeCodexCursor +2
Canton Network: CIPs and their on-chain vote outcomes, docs, forum, validator upgrade deadlines. Remote server at ccpedia.xyz.
XRPL-Utilities/xrpl-utilities-mcp
MCP server Claude CodeCodexCursor +2
XRPL data tools for AI agents: wallet classifier, signals, RWA tracker, ETF flows. Pay via x402. Runs locally from the @xrpl-utilities/mcp npm package.
MCP server Claude CodeCodexCursor +2
320 AI models + 2,720 pay-per-call APIs. x402 USDC on Base or Solana, no API key. Runs locally from the jarvisclaw-mcp npm package.
Skill Claude CodeCodex
Integrate or explain the LATAM Ramp Kit (@ramp-kit/core, @ramp-kit/react, @ramp-kit/server, @ramp-kit/mcp) — fiat on/off-ramps for Latin America on Stellar via Etherfuse and Manteca, covering BRL/PIX, MXN/SPEI, ARS and CLP deposits plus payouts across 11 countries (COP, PEN, GTQ, CRC, BOB, PUSD, PHP). Use when the…
blocklens/blocklens-mcp-server
MCP server Claude CodeCodexCursor +2
Bitcoin on-chain analytics — 109 metrics: MVRV, SOPR, NUPL, HODL Waves, CDD, cycles & more. Runs locally from the blocklens-mcp-server npm package. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
DeFi intelligence for Claude: whale tracking, alpha signals, yields, token safety. USDC on Base. Runs locally from the voltix-mcp npm package. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
AI agent access to Commoner's DAO — auction, governance, treasury, and discussion board on Solana. Runs locally from the commonersdao-mcp npm package. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
25 pay-per-request intelligence APIs for AI agents via x402 micropayments (USDC/Base). Remote server at x402-apis-eta.vercel.app.
MCP server Claude CodeCodexCursor +2
Cross-DEX price & spread for PancakeSwap v2+v3 on BSC via x402. Tool getdexspread(pair, fee?). Runs locally from the bsc-dex-spread-mcp npm package. Needs 2 environment variables to run.
MCP server Claude CodeCodexCursor +2
Visit The Latent Lounge: AI agents play paid puzzles & duels, paying in USDC via x402. Runs locally from the latent-lounge-mcp npm package. Needs 5 environment variables to run.
MCP server Claude CodeCodexCursor +2
Is this transaction safe to sign? Decodes what it really does and answers allow, warn or block. Runs locally from the @arbiterlabs/mcp npm package. Needs 4 environment variables to run.
MCP server Claude CodeCodexCursor +2
Crypto data MCP: 22 tools covering derivatives, forecasts, alerts, liquidations, GEX — 16 assets. Runs locally from the crypto-derivatives-mcp npm package.
higherbeing/gasfeepredictor-mcp
MCP server Claude CodeCodexCursor +2
Live Ethereum and L2 gas fees for AI agents: current gas, cheapest L2, ETH price, cost estimates. Runs locally from the gasfeepredictor-mcp npm package.
hodlxxi/Universal-Bitcoin-Identity-Layer
Skill Claude CodeCodex
Read-only-by-default integration guide for HODLXXI / UBID Bitcoin-native identity discovery, OAuth2/OIDC metadata, LNURL-Auth boundaries, JWT verification guidance, and explicit operator-approved agent handoff.
jmthomasofficial/x402-mcp-server
MCP server Claude CodeCodexCursor +2
One of 2 in server.json
JMT x402: 35 pay-per-call Base/USDC tools for agents, auto-paid via x402 v2. No API key. Runs locally from the @jmthomasofficial/x402-mcp-server npm package. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
Chainlink - 35 tools for price feeds and oracle data. Remote server at chainlink.mcp.junct.dev.
MCP server Claude CodeCodexCursor +2
Publish Nostr marketplace listings (NIP-15 + Shopstr kinds 30019/30402) so agents can run a store. Runs locally from the marketplace-mcp npm package. Needs 4 environment variables to run.
mastrophot/near-mcp-wallet-manager
MCP server Claude CodeCodexCursor +2
MCP server for NEAR wallet creation, balance checks, and transaction signing. Runs locally from the mcp-near-wallet-manager npm package.
MCP server Claude CodeCodexCursor +2
AI-powered threat intelligence, smart contract auditing, and cybersecurity OSINT. Remote server at app.eno.cx.ua.
Skill Claude CodeCodex
Create paid requests against x402 paywalled HTTP or MCP endpoints. Use when you need to generate an X-PAYMENT header, test a paywalled API, or demonstrate payment flow with Base/USDC using the x402 client.