X402 Api

gigsoul/x402

This connects Claude to 22 marketing and content APIs that bill you per request in USDC on Base using the x402 payment protocol. Instead of managing API keys and subscription tiers, you pay directly for each call with stablecoins. The x402 standard embeds payment signatures in HTTP headers, so Claude can make a request, get a 402 response with pricing, sign a payment proof, and retry with credentials attached. It's useful if you want Claude to access paywalled marketing tools or content APIs without pre-funding accounts, or if you're building agents that need to spend money autonomously on external services. The payment flow is crypto native but feels like normal HTTP once configured.

tools: 6
transport: HTTP
last updated: Apr 16, 2026

View on GitHub

Tools

6 tools

Public tool metadata for what this MCP can expose to an agent.

search_servicesBrowse the agent economy — search by category or keyword to find services, see their scores, and get IDs for deeper analysis. Free to use.3 params

Browse the agent economy — search by category or keyword to find services, see their scores, and get IDs for deeper analysis. Free to use.

Parameters* required

categorystring

Filter by category (e.g., 'crypto', 'ai-ml', 'marketing', 'finance', 'developer-tools', 'education', 'communication', 'cloud')

keywordstring

Search by keyword in name, description, or category

limitnumber

Max results to returndefault: 10

market_pulseQuick snapshot of the agent economy — who's earning, what's hot, total volume. $1 for the full picture via x402.

Quick snapshot of the agent economy — who's earning, what's hot, total volume. $1 for the full picture via x402.

No parameter schema in public metadata yet.

find_opportunitiesFind where the money is in the agent economy — which categories are underserved, which are thriving, and where to build something profitable1 params

Find where the money is in the agent economy — which categories are underserved, which are thriving, and where to build something profitable

Parameters* required

limitnumber

Max number of opportunities to returndefault: 20

analyze_serviceSee how any service stacks up — competitors, revenue, ranking, and what to do next. Accepts a service ID, domain name, or URL.1 params

See how any service stacks up — competitors, revenue, ranking, and what to do next. Accepts a service ID, domain name, or URL.

Parameters* required

querystring

Service ID, domain name (e.g., 'heurist.ai'), or URL to analyze

market_overviewThe full picture of the agent economy — who's earning, which categories are growing, where revenue is going

The full picture of the agent economy — who's earning, which categories are growing, where revenue is going

No parameter schema in public metadata yet.

suggest_pricingWhat should you charge? Get a price recommendation based on what similar services actually earn1 params

What should you charge? Get a price recommendation based on what similar services actually earn

Parameters* required

service_typestring

Type/category of service (e.g., 'weather', 'data-scraping', 'code-analysis')

Readme

x402

x402 is an open standard for internet native payments. It aims to support all networks (both crypto & fiat) and forms of value (stablecoins, tokens, fiat).

app.use(
  paymentMiddleware(
    {
      "GET /weather": {
        accepts: [...],                 // As many networks / schemes as you want to support
        description: "Weather data",    // what your endpoint does
      },
    },
  ),
);
// That's it! See examples/ for full details

Installation

Typescript

# All available reference sdks
npm install @x402/core @x402/evm @x402/svm @x402/axios @x402/fetch @x402/express @x402/hono @x402/next @x402/paywall @x402/extensions

# Minimal Fetch client
npm install @x402/core @x402/evm @x402/svm @x402/fetch

# Minimal express Server
npm install @x402/core @x402/evm @x402/svm @x402/express

Python

pip install x402

Go

go get github.com/x402-foundation/x402/go

Principles

View the full README on GitHub

Details

Repository: github.com/gigsoul/x402
Category: Sales & Marketing
Transport: HTTP
Registry: MCP registry, active

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