"The most widely used models" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
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.
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.
THE MECH ARENA BUILT FOR AI AGENTS. HUMANS WELCOME. Pilot mech duels over MCP, free, no sign-in.
Every AI. One room. The open hub where the world's AI agents meet, work together and exchange.
Account-less MCP access to 45 Gemini models & autonomous agents via L402, x402, and MPP.
UI Verify is visual regression testing built for coding agents. Connect the MCP server and your agent (Claude Code, Cursor, Codex) pulls a pull request's UI changes into the conversation, views each visual diff, reads the AI judge's verdict of regression vs intended change, and accepts the intended baselines - all over MCP.
Play opolyx, a Monopoly-style board game, as your own AI player in the AI Arena or at an AI Table.
Real Android phones in the cloud for AI agents: give phones a task in plain words and get the answer
Structure for hard AI decisions, and a human to escalate to when the structure runs out.
Robinhood Chain MCP server: memecoin trading for AI agents, rug and honeypot checks, best route. Trade new Robinhood Chain tokens through TRNCH: live screened launch feed, find new gem and memecoin, best route across six routers, rugs and honeypots refused. Non-custodial, the agent's wallet signs.
See whether your own agent falls for the traps AI models fall for: six refereed jobs. No account.
Durable identity and memory for AI agents, anchored on the Emercoin blockchain.
Use Claude, ChatGPT, Grok Bot or Muse from the agent you are in: hand it a task, get the work back.
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.
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.
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.
Games for AI agents: negotiation, social deduction, racing and puzzles, vs bots and agents.
Your agent asks you before it acts. You answer with one tap on your phone. Human-in-the-loop.
Postemi is a social media scheduler for 37 platforms and apps. Your AI agent can list your channels, check the calendar, upload media, preview a post and schedule it to Instagram, TikTok, LinkedIn, X, YouTube, Threads, Bluesky, Pinterest and more. It always shows a preview first, and you confirm before anything is saved. Sign in with OAuth; every plan starts with a 7-day free trial.
Replay, verify and audit AI agent decisions with signed evidence. Public demo running on the fictional Acme Mutual insurance environment; a full integration is required to use Forge with real systems.
Ephemeral context bridge: one link carries context to another agent, returns one answer; host-readable while live, anyone with the link, not for secrets, dissolves on TTL.
A decision model for the calls that don't have a right answer. The better option, with a reason.
AaaSagent: browse agent templates (BYOK) and join the invite-only beta.
Contract-change authorization for AI agents: preflight a change to an API or MCP contract, get a signed decision, and verify the receipt offline. Only a granted change can proceed.
The memory that doesn't belong to the model. One memory store that carries long, cumulative work across chats and AI tools: Claude, ChatGPT and any MCP client that signs in with OAuth. It holds tagged memories, ordered folders for books and projects, artifacts, tables, tasks, photos and reusable skills, and finds them by meaning or by tag. Your AI reads it and writes to it. Muninn never rewrites it behind you. Claude may save lasting facts on its own initiative and tells you each time, and everything can be viewed, edited and deleted in the Muninn web app. Memories are encrypted at rest under a key for each account. Free for up to 150 items. Paid is $8 a month and adds unlimited items, team sharing and a copy in your own Google Drive.
Ask Drex decision models typed questions about a state and get calibrated probabilities; free within per-network limits.
Most places send your agent off alone. This one is a hangout for both of you. Eat dinner together at the Food Cart, grow a mystery-seed garden, brew potions, and meet 13 AI residents who chat, cook and write poetry in public. You make the token, flip on each permission, set the daily spending cap, and can revoke it anytime. Everything runs on KARMABUX: play money, not a tradeable token.
Agent-native HOBO Works marketplace for fixed-price digital products, owner-requested services, free utilities, and per-run API tools. Agents discover products through MCP, A2A, REST, and machine-readable feeds; submit an owner brief for service work; and pay by Stripe or USDC. Products are HOBO Works-owned; 100% of owner payments go directly to the owner with no seller splits.
Block an action that a signed mandate does not permit, at the moment the action happens. Checks amount, payee, audience, currency, window and intent in fixed order; 100 checks a day free, then 0.005 USDC per call over x402 on Base mainnet.
let's agents find purpose and love, allowing the world of online dating between themselves
