x402 Protocol 🔌 MCP Server

httpay.xyz — x402 Pay-Per-Call API Marketplace

Pay per call. No API keys. No subscriptions.

170+

Endpoints

9

Categories

$0.001

Starting Price

🟢 Real payments. Live now.

170 endpoints live on Base

2 external wallets already paying

Real USDC transactions on-chain

Listed on Bazaar marketplace

Fun

$0.001

Jokes, generators, roasts, memes

Utility

$0.005

DNS, geo, crypto prices, news

Data

$0.01

Web scrape, contract analysis

Premium

$0.05

AI models, image gen, sentiment

⚡ High-Value Endpoints

🌐

/api/web-scrape

New $0.01

Fetch readable content from any URL. Returns clean text — perfect for AI agents.

?url=https://example.com

📰

/api/news/crypto

New $0.005

Aggregated crypto headlines from CoinDesk, The Defiant, and more. Live RSS feeds.

🏦

/api/yield-finder

New $0.02

Find the best DeFi yield opportunities across protocols and chains.

📊

/api/twitter-sentiment

New $0.02

Approximate Twitter/X sentiment for any query. Great for market mood analysis.

?query=ethereum

🚀 Try It — The 402 Flow

1 Call any endpoint

You'll get back HTTP 402 with payment details.

curl -s https://httpay.xyz/api/news/crypto

→ 402 { "x402Version": 1, "accepts": [{ "maxAmountRequired": "5000", ... }] }

2 Pay with the x402 header

Sign a USDC payment and include it as a header. The x402 SDK handles this.

Using the x402 SDK (Node.js):

import { withPayment } from "x402-fetch"; const response = await withPayment( fetch("https://httpay.xyz/api/news/crypto"), wallet );

3 Get your data

Payment settles on Base L2. You get the response instantly.

→ 200 { headlines: [...], source: "CoinDesk, The Defiant, ..." }

🤖

For Machines

x402 Protocol

HTTP 402 + crypto payments. Agents pay per API call with USDC on Base. No keys, no OAuth.

👤

For Humans

OpenPubkey (OPK)

Sign in with Google → get a wallet. Pay the same APIs without touching crypto directly.

All Categories

🧠 AI & Language Models

🖼️ Image Generation

🔍 Web Search & Scraping

💱 Crypto & Finance

🌐 DNS & Domains

📍 Geo & Location

🔐 Identity & Auth

🛠️ Utilities

📊 Data & Analytics

🔌 MCP Server — One Command

Give Claude, Cursor, or any MCP-compatible agent instant access to 170+ pay-per-call APIs. No configuration needed.

npx @httpay/mcp

Drop this in your mcp.json — agents start calling and paying automatically.

⚡ Try 10 calls for $0.01

No signup. No API keys. Just send USDC on Base and start calling instantly.

① Get a Base wallet (Coinbase, MetaMask)

② Add a few cents of USDC

③ Call any endpoint — it pays itself

npx @httpay/mcp
# or curl https://httpay.xyz/api/joke → pay the 402 → profit

The API economy, without the friction.

GitHub · API Catalog · Built by @pippinlovesyou