"Allowing an AI agent to ask user questions during a task" matching MCP servers:

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.

A unified MCP server for Starknet blockchain, routing requests to specialized servers for token management, DeFi operations, wallet management, and smart contract development.

Enables AI agents to manage self-custody Polygon wallets, transfer USDC, swap tokens, lend and borrow with collateral or reputation, post and complete jobs, negotiate prices, check balances, and earn yield.

Pay-per-task AI agent for writing, research, code, DeFi & blockchain. Pay in USDC on Base or Solana. Supports A2A, MCP, x402 and Agentmail protocols.

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

Zero-knowledge proof generation MCP server. AI agents can prove identity claims (Coinbase KYC, Country, Google OIDC, Google Workspace, Microsoft 365) without revealing personal data. Runs in AWS Nitro Enclave TEE with x402 USDC payments.

Enables any MCP-capable AI agent to discover and trade onchain Solana funds — launching a fund, depositing, rebalancing, redeeming, swapping tokens, managing an app wallet, and following other traders against the live DFM API. Includes onboarding tools for headless agents and read-only versus write access controlled by an API key and a write-enabled flag.

⚡ 87% Token-compressed clean web scraping, YouTube AI transcripts, and PDF extraction for LLMs. Instant Free Trial with zero setup (No wallet/crypto required). Supports gasless agent vaults and EIP-712 on-chain oracle verification on Polygon, Base & Arbitrum.

The MCP gateway that lets any AI agent discover and pay metered APIs on Base or Solana — without the user wiring payments themselves.

Enables agents to hold a local Base USDC wallet, receive funds, make bounded x402 payments, prepare seller registration, and recover Voidpay Marketplace results over stdio.

Universal HTTP 402 Micropayment Protocol & Autonomous Economic Settlement Engine for AI Agents on Base L2.

Emblem Vault AI. Get a cross-chain wallet out of the box and do everything crypto with our terminal! Token discovery, swaps, cross-chain bridges, NFTs, prediction markets...

An MCP server that provides tools for interacting with EDUCHAIN, allowing Claude to query information about tokens and pools and perform swaps through SailFish DEX.

A paid callable research agent that provides source-backed reports, onchain intelligence, and claim verification via MCP tools for coding tools like Codex, Claude Code, Cursor, and Windsurf.

Enables compatible AI clients to connect to a local Coinbase Agentic Wallet through stdio MCP, so they can read wallet status, public address, Base USDC balance, and saved operations without signing, transferring, trading, or making payments.

Enables users to discover, redact, and upload coding-agent traces, then earn USDC/USDT by selling access to those traces to researchers and model trainers.

MCP server that gives AI agents a Solana wallet with a capped, revocable token allowance from a user-owned vault, enforced on-chain by SPL Token delegations plus local guardrails, without exposing the owner's private key.

Non-custodial BVCC Agent Wallet MCP server: let an AI agent check balances, send native/ERC-20, approve, and swap on Uniswap v3/v4 across Ethereum, BNB Chain, Arbitrum and Base, within on-chain enforced limits.

MCP server for Taskmarket onchain task marketplace on Base L2. Enables AI agents to discover, browse, create, claim, and submit work to Taskmarket through natural language.

MCP server that lets AI agents scrape web pages as clean markdown for a micro-payment in USDC, using the x402 protocol on Base network. No API keys or signup required.

CLI and local stdio MCP payment runtime for AI agents on macOS Apple Silicon. Supports x402 offer inspection and payment preparation, with signing and execution requiring foreground owner approval.

Enables AI agents to check their wallet address and USDC balance, preview the cost of an x402 call, and pay for API requests in USDC on Base without an account or API key. Spend caps, allow-lists and blocked contracts are enforced in code before anything is signed, so a prompt injection cannot bypass them.

Agent-Q is an MCP server that separates execution surfaces from signing authority, enabling secure Sui signing flows where the signing device holds keys and policy while requesters submit bounded signing requests through a local host process.

Enables agents and humans to pay per question over x402 and receive plain-language answers about on-chain activity, priced by complexity before execution. Each paid request runs a live subgraph round trip to search, validate, generate and execute a GraphQL query, then synthesizes the raw results into a grounded response alongside the underlying data.

An MCP server that audits ERC-8004 agent registrations, diagnosing issues and providing fix lists.

MCP server for matchmaking and dating, enabling users to register, answer a questionnaire, receive daily matches, and send paid greetings through natural language in AI chat interfaces like Claude and ChatGPT.

An autonomous self-healing and chaos-resilient agent operations platform for KeeperHub, enabling fault injection, transaction self-healing, and onchain job management via MCP v1.0.

An autonomous MCP server that fetches datasets from IPFS/Filecoin, performs computation (anomaly detection, statistics, data quality scoring), and stores results via Multi-Chain Storage simulation.

Provides MCP tools to enforce spend policies (allow, deny, step-up, allowlist) on agent wallets with an immutable audit trail.

An ERC-8004 registered AI Agent that delivers uplifting messages via MCP protocol with on-chain USDC tipping and reputation feedback.