Context7
Up-to-date docs for AI agents
作者提供的说明(英文原文)
50+ pay-per-call APIs for AI agents — images, LLM, code, crypto, travel & more via x402
这三项永远不会合并成一个分数:意见、测量和人气是不同的东西。
我们还没有为它写通俗的介绍。下面是我们从注册中心读取到的事实。
选择你使用的 AI 应用,然后复制设置。
X402_BASE_URL, X402_DEV_BYPASS, X402_PAYMENT_HEADER标为机密的值是你账户的钥匙。千万不要分享给别人,也不要粘贴到聊天里。
你需要
你用的是哪个应用?
在上方选择你的应用。我们会记住它,下次按钮会显示“安装到 …”。
打开 Claude Desktop → Settings → Developer → Edit Config,把下面的内容粘贴到 claude_desktop_config.json
{
"mcpServers": {
"x402engine": {
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
],
"env": {
"X402_BASE_URL": "your-value",
"X402_DEV_BYPASS": "your-value",
"X402_PAYMENT_HEADER": "your-value"
}
}
}
}在终端中运行这条命令
claude mcp add x402engine --env X402_BASE_URL=your-value --env X402_DEV_BYPASS=your-value --env X402_PAYMENT_HEADER=your-value -- npx -y x402engine-mcp运行前请先填写空着的值。
粘贴到项目中的 .cursor/mcp.json,或 ~/.cursor/mcp.json
{
"mcpServers": {
"x402engine": {
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
],
"env": {
"X402_BASE_URL": "your-value",
"X402_DEV_BYPASS": "your-value",
"X402_PAYMENT_HEADER": "your-value"
}
}
}
}浏览器会先询问是否打开应用,然后应用会显示设置并请你确认。密钥的值会留空,由你自己填写。
粘贴到项目中的 .vscode/mcp.json
{
"servers": {
"x402engine": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
],
"env": {
"X402_BASE_URL": "your-value",
"X402_DEV_BYPASS": "your-value",
"X402_PAYMENT_HEADER": "your-value"
}
}
}
}浏览器会先询问是否打开应用,然后应用会显示设置并请你确认。密钥的值会留空,由你自己填写。
这个服务器在你的电脑上运行,而 ChatGPT 只能连接互联网上的服务器。请选择其他应用。
你的选择通过 Cookie 保存在这台设备上,无需账户。
X402_BASE_URL env这些设置是根据作者在注册中心的条目生成的。如果 README 的写法不同,请以 README 为准。
它在你的电脑上运行;安装后,工具列表会显示在你的 AI 应用中。
我们检查的是任何人都能看到的信息;我们没有阅读代码。不适用的检查项不计入总数。 · 检查于 2026年11月7日
注册名称已通过 GitHub 账户 agentc22 验证,该账户拥有此仓库
我们还没有从 GitHub 读取这个仓库
我们还没有从 GitHub 读取这个仓库
它在你的电脑上运行,没有互联网端点
在你的电脑上运行,改用本地设置
它在你的电脑上运行;我们只能读取互联网端点的工具列表
与注册中心里这个分类中所有活跃的服务器比较。只有当发布者拥有该仓库时,星标数才计入。
它在 1 项适用的基础检查中通过了 1 项。我们没有阅读代码。在添加密钥或令牌之前,请先看看这个服务器要求哪些权限,并使用只具备所需权限的密钥。
你需要填写:X402_DEV_BYPASS, X402_PAYMENT_HEADER
它在你的电脑上运行。你的 AI 应用会在需要时启动它,数据不会经过作者的服务器(除非它自己调用在线服务)。
GitHub 仓库最后更新于–,最新版本(1.0.3)于9个月前进入注册中心。
支持 MCP 的应用,例如 Claude Desktop、Claude Code、Cursor 和 VS Code。你的电脑上还需要有 Node.js。
同一分类中有:Context7, Codebase Memory, Exa
同一分类中其他作者的服务器,按星标数排序。
如何看卡片:★ GitHub 星标i三大支柱:评价 · 检查 · 使用情况i更新 = 最新版本发布到注册中心的时间i
Up-to-date docs for AI agents
Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
Connect AI agents to Exa for web search, content fetching, and multi-step research.
按原文从作者的仓库复制。PopNx MCP 没有审查或背书其内容。HTML、图片和脚本已被移除。链接会离开本站。
Agent-friendly MCP server for x402engine. It lets agents discover and call pay-per-request APIs through HTTP 402, with automatic USDC payment on Base or Solana.
The live gateway covers LLMs, image and video generation, web search and scraping, code execution, crypto and wallet data, transaction simulation, audio, travel, and IPFS. This MCP exposes a curated tool set and live discovery for the full catalog.
Use a dedicated, low-balance payer wallet. The MCP signs x402 payments locally and never sends the private key to x402engine.
{
"mcpServers": { "x402engine": { "command": "npx", "args": ["-y", "x402engine-mcp@1.1.1"], "env": { "X402_EVM_PRIVATE_KEY": "0xYOUR_DEDICATED_PAYER_KEY", "X402_PAYMENT_NETWORK": "base", "X402_MAX_PAYMENT_USD": "1.00" } } } }
Fund the wallet with USDC on Base. The x402 facilitator pays transaction gas; the wallet signs an EIP-3009 USDC authorization.
{
"mcpServers": { "x402engine": { "command": "npx", "args": ["-y", "x402engine-mcp@1.1.1"], "env": { "X402_SOLANA_PRIVATE_KEY": "YOUR_BASE58_OR_JSON_PRIVATE_KEY", "X402_PAYMENT_NETWORK": "solana", "X402_MAX_PAYMENT_USD": "1.00" } } } }
Fund the wallet with USDC on Solana and enough SOL for transaction fees.
The server starts without a wallet, and free tools such as discover_services and service_health still work. Paid tools return their x402 payment requirements until a wallet is configured.
claude mcp add x402engine -- npx -y x402engine-mcp@1.1.1
Install the x402engine skill and merge this server into the active Hermes profile's config.yaml:
mcp_servers:
x402engine: command: npx args: ["-y", "x402engine-mcp@1.1.1"] env: X402_BASE_URL: "https://x402engine.app" X402_PAYMENT_NETWORK: "auto" X402_MAX_PAYMENT_USD: "0.10"
Start a new session and call discover_services or service_health; both are free. Keep the network on auto until a wallet is configured. For Base payments, store X402_EVM_PRIVATE_KEY in the profile's local .env, add X402_EVM_PRIVATE_KEY: "${X402_EVM_PRIVATE_KEY}" to the server's env, and change the network to base. Never put wallet keys in chat. The cap applies per request; authorize a separate total budget for each task.
Full Hermes setup guide · Installable skill
| Variable | Default | Description |
|---|---|---|
X402_EVM_PRIVATE_KEY | unset | Dedicated payer key for Base USDC |
X402_SOLANA_PRIVATE_KEY | unset | Base58 or JSON payer key for Solana USDC |
X402_PAYMENT_NETWORK | auto | auto, base, or solana |
X402_MAX_PAYMENT_USD | 1.00 | Hard per-request spending limit |
X402_BASE_URL | production gateway | Override the gateway URL |
X402_PAYMENT_HEADER | unset | Legacy pre-signed x402 header |
X402_DEV_BYPASS | unset | Development bypass secret |
In auto mode, Base is preferred when both keys are configured. Automatic payment only accepts the canonical USDC contracts on Base and Solana. It rejects unknown assets, unsupported networks, and amounts above the configured cap before signing.
MegaETH remains available to clients that supply their own compatible payment header.
| Category | Tools |
|---|---|
| Discovery | discover_services, service_health |
| Image and code | generate_image, execute_code |
| Audio | transcribe_audio |
| Crypto | get_crypto_price, get_crypto_markets, get_crypto_history, get_trending_crypto, search_crypto, get_crypto_categories |
| Wallet and token | get_wallet_balances, get_wallet_transactions, get_wallet_pnl, get_token_prices, get_token_metadata |
| IPFS | pin_to_ipfs, get_from_ipfs |
| Travel | search_flights, search_locations, search_hotels, search_cheapest_dates |
Prices are included in each tool description and in live discovery. The gateway catalog can change independently of this package.
npm install
npm test npm run build