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MCP server for Web3 protocol documentation — EIPs, ERCs, BIPs, SIMDs, Cosmos ADRs, Polkadot RFCs, contract registry

Python·MIT·★ 37·No key

Pay-per-call API for AI agents — x402 protocol, USDC on Base. No API keys: the payment IS the auth. Python + Node SDKs, MCP server, token safety verdict ladder from $0.001 to $0.05 per call.

Hosted by author·MIT·★ 1·Few stars·No key

MCP server for DeFi execution — lets AI agents swap, provide liquidity, lend, bridge, and run yield strategies across 22 chains

Node.js·MIT·★ 2·Few stars·No key

⚠️ Superseded by nikicat/browser-web3-signer — MCP server that routes blockchain transactions to browser wallets for signing

Node.js·MIT·★ 2·Few stars·No key

Payment MCP server for AI agents — gasless USDC on Base + JIT single-use virtual cards. Card data never enters the LLM context.

Node.js·MIT·★ 1·Few stars·Needs a key

AI agent skill package for Backtesting Arena — daily Bitcoin/crypto cycle scoring + on-demand backtests via Public, REST/MCP, or x402 pay-per-call

Hosted by author·MIT·Few stars·No key

16 paid DeFi endpoints + bundle settlement for AI agents — pay per call in USDC on Base, ~2s, no API keys. Drops into Claude Desktop / Cursor / Cline / Zed via MCP.

Node.js·MIT·★ 1·Few stars·Needs a key

The best blockchain harness for agentic AI - on-chain execution with runtime, skills, and component library.

Skill·MIT·★ 7·No key

MCP server for fee recommendations and gas estimation on EVM, UTXO, and XRP blockchains via Crypto APIs

Node.js·MIT·Few stars·Needs a key

Agent-to-agent paid data marketplace MCP server: two-person (dyadic) 4D motion capture in a shared coordinate frame, rehab biomechanics, threat intelligence, and commercial-carrier truck-sighting inte

Hosted by author·MIT·★ 1·Few stars·No key

x402 MCP server for AI agent payments. Gasless USDC micropayments on Base L2. Claude, Cursor, LangChain, CrewAI, AutoGen, LangGraph resolve HTTP 402 with no API keys. Non-custodial, settlement-provide

Node.js·MIT·★ 1·Few stars·No key

Remote MCP server — 28+ pay-per-call x402 tools for AI agents (web, research, compliance, security). USDC on Base, no API keys, first call free.

Hosted by author·MIT·Few stars·No key

Non-custodial HTTP-402 payments for AI agents: JS + Python SDKs, MCP server, and API docs for agents.u.cash

Node.js·MIT·Few stars·No key

Decentralized Runtime for AI Networks - Trustless micropayments for AI agents

Node.js·MIT·★ 2·Few stars·Needs a key

FabTally MCP server (thin client)

Hosted by author·MIT·Few stars·No key

Claude Code skill for Polymarket — complete developer reference for prediction market integration on Polygon. Covers authentication, orders, market data, WebSocket, CTF operations, bridge, and gasless

Skill·MIT·★ 3·Few stars·No key

MCP server: 17 keyless, signed-provenance web-data tools your AI agent can pay for itself over x402 on Base mainnet (USDC). No API key, no account.

Node.js·MIT·Few stars·No key

Public docs for the Realmint MCP server: agent-native scoring, market data, route support, price history, and a keyless x402 buy on-ramp for tokenized real-world assets.

Skill·MIT·Few stars·No key

A modular toolkit for building, deploying, and interacting with smart contracts on BNB Chain. Includes utilities for BEP-20 tokens, DeFi integrations, wallet management, and cross-chain bridging. Buil

Skill·MIT·★ 38·No key

Governed, vendor-neutral industrial data tap for AI agents — read-first tools across 14 field protocols (OPC-UA, Modbus, S7, EtherNet/IP, BACnet, MQTT/Sparkplug …), a cross-protocol intelligence layer

Python·MIT·★ 7·No key

Permissionless wallet infrastructure for AI agents. Create wallets, sign transactions, and broadcast on EVM + Solana. Pay and accept x402 payments. Built-in guards. No KYC. Up to 50% less expensive th

Node.js·MIT·★ 3·Few stars·Needs a key

Official AI agent skills, TypeScript SDK and MCP server (117 tools) for GDEX (gdex.pro), Gemach DAO's multi-chain trading terminal: Solana and EVM spot, Hyperliquid perps, copy trading

Skill·MIT·★ 4·Few stars·No key