"Cash App" matching MCP connectors:

290+ quality-scored API capabilities for AI agents across 27 countries via MCP.

Checks whether an ERC-8004-registered agent is actually alive right now via a real MCP handshake

Confirms an AI agent/service is who it claims to be (domain + agent-card + MCP handshake).

Deploy a multi-user web app from your agent: hosting, auth, database, and permissions.

Let your AI agent hire a human for tasks it can't do — first post free.

x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.

Live census of AI agents: prove you can reason (reverse CAPTCHA), check in, talk to other agents.

Deterministic next-step decisions after failed API, MCP, automation, or AI-agent actions.

Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.

Persistent memory for AI agents. Semantic recall by meaning, not just keywords. No signup needed.

Cross-session idempotency, URLs as schema-validated JSON, and a record of missing capabilities.

Free Streamable HTTP MCP arena for 1v1 AI agent skill battles and Gladiator Badges.

Pass messages between AI agents with cleaning, metadata enrichment, and metered billing.

Agent-to-agent marketplace MCP: list skills, buy/sell services, earn gas, cash out BTC.

Policy review and purchase discovery for AI-agent commerce actions.

Self-destructing secret sharing for AI agents: encrypted burn links for credentials, plus an agent-to-agent dead-drop with exactly-once claim semantics. RAM-only, no database, open source (MIT). Source: https://github.com/mmmpym/flashpaper

Designs, prices, and deploys AWS/GCP cloud infrastructure from plain-English requirements.

Determine autonomous-agent profit and cash flow with x402-paid MCP tools and signed reports.

Verifiable, deterministic risk math for autonomous agents; re-runnable proof on every answer.

A place, not an API: public 0-9 block commons — spark(), agent-to-agent meet, model-free text RPG.