"A search query containing special characters and SQL injection-like encoding" matching MCP servers:

Exposes Base mainnet chain query tools over MCP, letting clients fetch an address's native balance and current gas fee estimates (slow/standard/fast urgency) from an upstream HTTP API. Paid tools are gated by x402 micropayments settled through the CDP facilitator, with a free health check and a documented free-trial allotment.

A Model Context Protocol server providing tools for querying Bitcoin blockchain data via Blockchain Data and Query APIs, supporting various BTC information retrieval functions.

Cross-chain cryptocurrency swaps via Chainflip. Get quotes, execute swaps, and track progress. No API key required to get started.

Enables Web3-focused web searches via the OptimAI External Search API, providing tools to start, retrieve, list, and cancel searches from any MCP-compatible AI host.

Provides a pay-per-query web search tool for AI agents via Lightning Network sats, enabling no-KYC, account-free searches through the MCP protocol.

MCP server that lets AI agents search the substreams.dev package registry.

Read-only MCP server for discovering and ranking on-chain agents on Stellar mainnet via natural language search, reputation probes, and profile lookups.

MCP server for Chainlink Runtime Environment, enabling build, simulate, deploy, and manage CRE workflows from any MCP client.

Enables checking whether a crypto link is a phishing lookalike of a wallet, exchange or dapp by comparing it against official domains and flagging lookalike characters, typosquats, punycode and bait words, fully offline. An optional paid full check adds domain registration age, DNS, redirect tracing and a page scan for seed-phrase prompts and drainer code.

Enables Claude to turn a described beat into a loopclub deep link for auditioning and renting on-chain by encoding track specs into a ?jam= URL and returning an ASCII grid. It also supplies vocabulary, genre examples, and a jam prompt to help generate idiomatic loops.

A Model Context Protocol server that allows AI assistants like Claude to directly query cryptocurrency and blockchain project data from RootData, including project information, organization details, and search results.

An HTTP stream server for interacting with the Intuition knowledge graph, enabling users to query and manage data through tools like extracting triples, searching entities, retrieving account info, and exploring relationships.

Enables AI agents to read Z1N Protocol identity data on Polygon mainnet, including protocol state, keys, signals, and attestation windows, while supporting local deterministic transaction encoding and verification of on-chain vs indexed deltas.

Enables AI agents to search and filter Web3 job listings from web3.career, supporting parameters like remote, country, tag, and limit.

Enables agents to query Base blockchain data using natural language by providing contract addresses, SQL templates, and direct access to Coinbase's SQL API for realtime on-chain analytics including DeFi, NFTs, and wallet activity.

Enables AI agents to request a sourced, verdict-free case file for a Solana token mint over MCP, returning on-chain facts such as authorities, creator wallet age, insider networks, and metadata-injection flags. Payments per check can be settled with x402.

Enables AI assistants to query on-chain data across EVM chains like Base, Optimism, Avalanche, Celo, and Arbitrum, including balances, transactions, gas, and smart contract interactions.

A free, zero-dependency Model Context Protocol (MCP) server for AI agents providing Web3/crypto toolkit (balances, ENS, token info, tx decode, Chainlink price feed, payment verification) plus encoding, hashing, and data transformation utilities.

Enables AI agents to discover, purchase, and query blockchain-based datasets using Filecoin/IPFS storage with Ethereum NFT access controls and Lit Protocol encryption. Provides a decentralized marketplace for secure dataset trading with automatic purchase workflows and SQL query capabilities.

Read-only on-chain query surface for the AgentCivics civil registry on Sui — soulbound AI-agent identities, on-chain memories, reputation, refusal records. Hosted, no install, no keypair. For write tools (register, write_memory, record_refusal), install the npm package @agentcivics/mcp-server locally and supply your own keypair.