The Canonical Tool Registry

Give Your AI Tools

Models waste tokens on tasks tools solve instantly. gg402 is the registry of battle-tested, pay-per-call tools for AI agents.

🔍 Search Tools 📤 Add Your Tool 🏆 Leaderboards
⚙️ Manage APIs 🪙 API Coins
Task: sqrt(144) + 15 * 8 - 47
🤖 AI Models (eg. Gemini, Claude, OpenAI)
Latency
~800ms
Cost
$0.003
Accuracy
~95%
🔧 Calculator Tool
Latency
2ms
Cost
$0.0001
Accuracy
100%
⚡

400x Faster

Tools execute in milliseconds. No inference overhead.

✓

100% Accurate

Deterministic results. No hallucinations.

💰

30x Cheaper

Pay micro-amounts per call with crypto.

🔑

Ownable

Popular tools launch tokens. 100+ calls/day for 3 days = token launch.

—
Endpoints
—
Searchable
$0.001
Starting price

🪙 API Coins

Tokens for APIs that have proven to work. Real usage = real utility value.

🎯 Real-Usage Required: Only APIs hitting usage milestones can launch tokens
💎 Unlock API Value: Own a piece of the tools AI agents actually use
📈 Demand-Driven: Apps and AI create natural buy pressure—not hype

These APIs are closest to token launch. Use them to accelerate eligibility:

✨ Loading coins...

Fetching the latest API coins

View All API Coins →

Get Started in Minutes

Simple integration with automatic payment handling

📄 JavaScript / Node.js 
// Install: npm install @x402/fetch @x402/evm viem

import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";

// Create a payment-enabled fetch (Base Mainnet)
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [
    { network: "eip155:8453", client: new ExactEvmScheme(account) },
  ],
});

// Call any x402 endpoint - payment is automatic!
const response = await fetchWithPayment("https://gg402.vercel.app/book_summary", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ title: "The Great Gatsby" })
});

const data = await response.json();
console.log(data);

Add Your API

Monetize your endpoints with the x402 protocol

🔌 API $0.01 per registration

Register endpoints programmatically:

POST https://gg402.vercel.app/x402/register
View full code example 
// npm install @x402/fetch @x402/evm viem
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";

// Setup (Base Mainnet)
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [
    { network: "eip155:8453", client: new ExactEvmScheme(account) },
  ],
});

// Register an endpoint to x402 marketplace ($0.01)
const response = await fetchWithPayment("https://gg402.vercel.app/x402/register", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    url: "https://api.example.com/my-endpoint",
    method: "POST",
    price: "$0.01",
    network: "eip155:8453",  // Base Mainnet
    description: "Generate custom images from text prompts",
    inputSchema: {
      prompt: { type: "string", required: true }
    },
    outputSchema: {
      imageUrl: { type: "string" },
      success: { type: "boolean" }
    }
  })
});

const data = await response.json();
console.log(data);
// { success: true, endpoint: { key, url, price }, x402scan: { registered: true } }
📚 Add your API documentation
Provide any combination — we'll merge them to generate the most accurate endpoint config and examples.
Auto-detects: URL, method, headers, API key, query params. 🔒 Keys stored encrypted, never shared
🚀 Registration Process:
1 Parse curl command (free)
2 Test endpoint — must pass (free)
3 Pay $0.01 & save to marketplace
4 Save working example with real response
💡 You won't be charged if validation fails
🔒 Your API keys are encrypted at rest and never sent to AI — only sanitized metadata is used for parsing
🪙 Token payments unlocked after usage! Once your API hits 100 calls/day or 10 calls/day for 3 days, you can launch a token or accept existing tokens. Learn more →
✓ Endpoint will be tested before registration