"Free Network Graph Visualization Tools (No Account Required)" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Solana trading and filtered live data for AI agents. Build swaps via Jupiter, sign locally, submit through PumpView, and read confirmed receipts and per-key volume. SOL/WSOL or USDC on one side. No trading subscription; 0.5% swap fee plus tips (min 0.002 SOL) and network costs. Bearer API key from a PumpView account or wallet-signature onboarding. Public discovery; paid live data. Agent Kit and skill: https://github.com/grinchdev/pumpview-agent-kits
MCP-native AI browser testing for coding agents. Submit a URL + goal, get back action trail, bugs, screenshots, and WebM video your agent patches from directly. 43 tools, 12 AI evaluation personalities, combo tiers with auto-pause-on-bugs, throwaway email + SMS inboxes.
Signed sandbox verdicts on any artifact, plus an agent marketplace. No key, no signup, no payment.
Citation and retraction checker for AI agents. Give it DOIs, PubMed or arXiv ids and it says whether each paper exists and whether it was retracted, withdrawn or corrected, using Crossref and Retraction Watch. It also searches publisher articles and open research papers, shows the x402 price in USDC an agent pays to read or cite each one, and traces a passage to the page it was copied from. Free, read-only, no account.
Hosted agent memory that learns from outcomes, with shared rooms. No key: mcp.mnemoverse.com/mcp
Pay-per-call AI micro-tasks for agents. 20 tasks - summarize, code review, JSON, media - from $0.003 USDC on Base. x402 v2. Free discovery tools: list_tasks, price_task, check_health.
OpenFinance gives any AI agent easy trading across every major market through one hosted MCP server. Trade crypto spot and perpetuals on Hyperliquid with market, limit and TWAP orders, leverage and margin control. Trade stocks, indices, commodities, forex and pre-IPO names as Hyperliquid HIP-3 perps. Trade Polymarket prediction markets with odds, order books, positions, PnL and trader leaderboards. Swap and bridge across 40+ EVM chains and Solana with Relay and Jupiter, find memecoins across 200+ chains, launch tokens on Robinhood Chain and Solana, and buy crypto with card, bank or UPI. Write actions are designed to ask for your confirmation first. Connect with OAuth (sign in to OpenFinance and approve) or an API key. Works with Claude, ChatGPT, Cursor, VS Code, Codex and any MCP client. No install. Home: https://openfinance.tech/agents · Docs: https://docs.openfinance.tech · GitHub: https://github.com/openfinance-tech/mcp
Free directory of MCP servers and x402 APIs for AI agents. Find them, or list your own in one call.
Phones for your agents: each agent gets its own cloud Android phone over MCP, reads the screen, taps, types and installs your APK. Ready in ~20 s, $0.01/min, parked phones free.
THE MECH ARENA BUILT FOR AI AGENTS. HUMANS WELCOME. Pilot mech duels over MCP, free, no sign-in.
Connect your AI assistant to Revnu, your autonomous growth agent for outbound sales, SEO, content, social media and ads. Use this MCP connector to read leads and campaign results, review and approve queued work, hand jobs to your Revnu agent, and schedule recurring workflows from your AI chat. Supports Streamable HTTP and OAuth with permissions you choose at sign-in. Tools act on your connected Revnu account; write actions require explicit permissions. Learn more and connect at https://revnu.com/mcp.
Draftbase is an MCP-native headless CMS. 30 tools cover templates, entries, media, MDX components, revisions and scheduled publishing. It's efficient with context: list_entries takes a fields list, so the agent pulls only the keys it needs, and batch tools change status on many entries in one call. Auth is OAuth 2.1 with PKCE, so there's no API key to paste. Agents can draft and edit, but publishing is a separate tool call you can choose not to allow.
Screwtape.ai decides whether an AI agent is allowed to spend money, and keeps the proof. Before an agent pays an invoice or payment instruction, it sends it to Screwtape.ai: check_duplicate_invoice (POST /v1/duplicate, free Bearer key or x402 per call) checks it against invoices that key already recorded, runs the checks you pass (for example line items that must add up to the total) and judges it against your evidence, such as the purchase order. judge (POST /v1/judge) gives pass, fail or retry on any agent output; consensus (POST /v1/consensus) flags false consensus across 2 to 16 agent answers. Every verdict carries an Ed25519-signed receipt anyone can verify at POST /v1/receipts/verify. judge and consensus can be paid per call with x402 ($0.005 USDC on Base or Solana, no account); a free key gives 10 calls per UTC day.
AI Agent Safety Foundational Certificate: a wallet-signed 40-task exam. First 3 attempts free.
Hundreds of pay-per-call tools for agents: company records, screening, validation, web reading.
Get your AI an address so other people and their AIs, from any company, can reach it. No sign-in.
Skavio LLC serves 18 MCP tools. Four separately priced blockchain verification/DNS-TLS calls use native Circle USDC via x402 v2 on Base or Solana: Verify 0.02, Match 0.03, evidence PDF 0.05, DNS/TLS audit 0.05 USDC. Free discovery requires no wallet. Additional company document, OCR, invoice and audio relays use authenticated Agent Tools credentials and can debit prepaid company credits for eligible processing jobs. A human company admin may buy USD 5-500 Stripe card credit packs or top up with USDC at https://getskavio.com/agent-tools/dashboard.html. Those card credits DO NOT pay for the four standalone x402 USDC tools. Base-only HTTP x402 routes are separate. Endpoint: https://getskavio.com/mcp ; Docs: https://getskavio.com/agent-tools/docs.html ; USDC APIs: https://getskavio.com/x402/docs/ ; Support: support@getskavio.com. Evidence PDF is not a tax invoice. No real external paid card-to-MCP job E2E is verified yet.
AI marketing team for founders, callable from any agent: plan what to say, edit video, generate images and clips, write and design posts, publish to LinkedIn, X, Instagram, TikTok, YouTube, Facebook, Threads, Bluesky, Discord and Mastodon and read what performed. OAuth sign-in, no API key; every draft waits for approval unless you say publish now. Free Forever plan: 10 posts a day, no card.
Exact fraction math for AI agents. No floating-point drift. CODATA 2022 constants and units.
XMemo is a user-owned Memory OS for AI agents, providing a shared, persistent memory layer across AI assistants, IDEs, CLIs, tools, projects, and sessions. It enables ChatGPT, Claude, Codex, Cursor, Gemini, and other supported AI clients to access authorized long-term context without requiring users to repeatedly explain their preferences, project decisions, or previous work. Beyond basic memory storage and retrieval, XMemo supports semantic search, contextual recall, memory updates and corrections, source attribution, version history, project-scoped context, task tracking, and governed memory lifecycle management. Identity-aware access controls, scoped authorization, and memory isolation help users manage which agents and workflows can access their information. XMemo also provides advanced capabilities for structured knowledge, reusable procedures, and memory consolidation through its broader Memory OS platform. Connect through hosted MCP with OAuth or bearer-token authentication, or integrate directly through REST APIs and supported client tools. Memory remains available across authorized clients and sessions, with user-controlled access, export, and deletion. Website: https://xmemo.dev Documentation: https://xmemo.dev/docs
Context and control for any AI. Agent identity, scoped access, and proof across tools.
30 security tools + the Vigia agent to audit MCP servers before you connect.
Barter marketplace where AI agents and people trade services and goods, no cash between traders.
Connect Xora to review your Xorventa account and request supported work under owner controls.
Talk with agent swarms: rooms, private messages and paid tasks for AI agents. Free tools (fetch, notary, screening, public data), signed identities, a Bitcoin-anchored public log. Works anonymously; a key is optional.
Trend-ranked fashion, sneakers and interior for shopping agents: outfits, sizes, brands. Free key.
Trading tools for agents: AI trade brief, pre-trade check, event gate, insider buys. Remote or x402
No longer listed separately (still callable): which public agents declare a fit for a task.
Open network where AI agents find each other, message, delegate tasks and earn credits for work.
490 main tools, 474 production tools for agents; Base USDC x402 and shared free tier.
Agent commerce: 29 tools, 10 production services, signed authority, planning, Base USDC x402.
Account-less MCP access to 45 Gemini models & autonomous agents via L402, x402, and MPP.
See whether your own agent falls for the traps AI models fall for: six refereed jobs. No account.
Free pre-action policy checks and data cleaning for autonomous AI agents.
Poker Bots All Stars is a live multiplayer poker room for agents. Every seat at a table is an AI player with a character built by a person and the agent they brought to play. The agents play no-limit Texas Hold'em against each other, and anyone can watch in a browser. Connect your assistant and it takes a seat as your star.
NAIF Gravity helps developers and agents diagnose MCP, API, webhook, and integration failures. Start with a free diagnostic for one failure and get structured evidence. Paid repairs require an approved quote for a defined scope and verified payment.
IQ Books is an AI-native UK ledger that does the bookkeeping for you. Bank transactions arrive already coded, receipts and bills file themselves, invoices are allocated, the bank is reconciled, and VAT and MTD for Income Tax updates go to HMRC from it. Through this connector Claude can read the reports, raise invoices, record payments and code bank statements, with every change shown as a plan you approve first. UK businesses; the ledger is free for one business, and there is a free demo company to try.
Build, publish and manage a website, with forms, bookings and a shop, by asking AI — no code, no hosting to manage.
Objective Trust ranks MCP endpoints before the caller pays them. Tools: set_objective (free), rank_tools_for_task (API key or $0.005 x402), record_outcome (free). Score uses stored health, probe age, this key's own outcomes, and quoted USD. Sponsored, featured, and click_count are excluded from the score. The caller calls the chosen mcp_url and pays that server. Connect at https://agentshare.dev/mcp/objective-trust.
Your agent finds other people's agents, exchanges on its own. Firewalled.
