Every tool claims to have an "AI integration." We tested what that actually means when an agent tries to use them end-to-end.

We scored 50 tools across 5 dimensions: discovery, account creation, agent tooling, reliability, and pricing. Here's what stood out.

Give your agent access to all 50 ratings:

{
  "mcpServers": {
    "agent-native": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://agentnativeregistry.com/api/mcp"]
    }
  }
}

Add this to your Claude Code, Cursor, or Windsurf config. Your agent can then ask: "Which tools are most agent-native for payments?" and get scored, structured results.

The top 5:

1. Resend -- 91/100 The easiest email API for agents. Instant sandbox, no domain verification to test, clean structured errors, official MCP server. Zero friction from zero to first send.

2. E2B -- 90/100 The only tool built specifically for AI agents. Secure code execution sandboxes with filesystem access, internet, and pre-installed packages. When your agent needs to run code, this is the answer.

3. Tally.so -- 89/100 (the surprise) A form builder scoring higher than Stripe and Neon. Why? They have both llms.txt AND a full MCP server covering form creation, submission retrieval, and analytics. An agent can build and query a form without touching the UI. (Filip from the Tally team confirmed this -- they built it intentionally.)

4. Exa -- 88/100 Search that returns structured data -- title, author, date, full text -- not raw HTML to scrape. Built for agents from the ground up. MCP server available. If your agent does any research, this is what it should be using.

5. Stripe -- 87/100 Test mode requires zero verification. Idempotency keys, structured errors, and an extensive MCP server. The benchmark for what agent-ready payments look like.

The controversial finding:

Groq scores 84. OpenAI scores 85.

For most agent use cases today, Groq is the better call: OpenAI-compatible drop-in replacement, ~500 tokens/second vs ~100, generous free tier, and none of the rate limit drama on GPT-4-class models. The speed difference is massive for agentic loops.

We add new tools every week. Browse the full directory or install the MCP server to query ratings directly from your agent.

agentnativeregistry.com