Best x402 MCP servers
20 working options, checked Nov 8, 2026.
Short answer: the top picks for pay-per-call with x402 right now are QuickBuild agent tools, switch402 and ScrapeMole. We list 20 options here: 20 work without sign-in.
x402 is a way for AI agents to pay for an API call on the spot, usually in USDC, with no account or API key. An x402 MCP server charges a few cents per tool call and the agent pays automatically from its own wallet.
Top picks
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QuickBuild agent tools
Pay-per-call web, AI, speech and Base on-chain tools for agents (x402 USDC, no API key).
Tools include
launchcheck_full,website_audit,page_metadata,domain_intel,x402_preflight -
switch402
Web scraping, search, screenshots and PDF to text for agents, paid per call over x402. No signup.
Tools include
scrape,scrape_lite,map,metadata,screenshot -
ScrapeMole
Pay-per-call public web data for agents: YouTube search, channels, transcripts, Google Trends, Amazon products (x402, USDC on Base).
Tools include
google_trends,youtube_transcript,youtube_search,youtube_channel,youtube_video -
Gouda Studios Agent Tools
Pay-per-result SAM.gov, SEC EDGAR, USAspending, GLEIF LEI, contacts, YouTube transcripts and Google Trends for AI agents.
Tools include
get-actor-run,get-dataset-items,get-key-value-store-record,abort-actor-run,gouda_studios--sam-gov-opportunities-feed -
Money Maker x402 tools
Pay-per-call EVM reads and AI tasks for agents over MCP + x402 (USDC on Base).
Tools include
repo_ai_policy,x402_lint,usdc_payment,erc8004_agent,token_transfers
All 20 compared
| Server | What it does | Setup | Tools |
|---|---|---|---|
| QuickBuild agent tools | Pay-per-call web, AI, speech and Base on-chain tools for agents (x402 USDC, no API key). | Hosted, no sign-in | 40 |
| switch402 | Web scraping, search, screenshots and PDF to text for agents, paid per call over x402. No signup. | Hosted, no sign-in | 9 |
| ScrapeMole | Pay-per-call public web data for agents: YouTube search, channels, transcripts, Google Trends, Amazon products (x402, USDC on Base). | Hosted, no sign-in | 9 |
| Gouda Studios Agent Tools | Pay-per-result SAM.gov, SEC EDGAR, USAspending, GLEIF LEI, contacts, YouTube transcripts and Google Trends for AI agents. | Hosted, no sign-in | 11 |
| Money Maker x402 tools | Pay-per-call EVM reads and AI tasks for agents over MCP + x402 (USDC on Base). | Hosted, no sign-in | 28 |
| AgentKit x402 | Pay-per-call email, DNS, SPF/DMARC, site-contact, IBAN and Swedish validation tools for agents | Hosted, no sign-in | 13 |
| ExtractPDF | Extract text from any PDF or DOCX — $0.01 USDC per call, no API key needed | Hosted, no sign-in | 1 |
| ScrapeAgent | Pay-per-use web scraping for AI agents — $0.01 USDC, no API key needed | Hosted, no sign-in | 1 |
| Avo Cado Read | Turn any public web page into clean Markdown for AI agents, pay-per-call via x402. | Hosted, no sign-in | 2 |
| StableDomains | Search, register and manage domains from any MCP client, paying in USDC or USDT on 7 chains. | Hosted, no sign-in | 38 |
| x402-tools (agent-audit + page-read) | Pay-per-call web tools settled in USDC on Base via x402. | Hosted, no sign-in | 7 |
| ToolPick | Find and live-check the paid x402 API for an agent task, ranked by real 30-day payers and price. | Hosted, no sign-in | 1 |
| Dirtsmith Agent Tool Rate Sheet | Compare published per-call prices of 21 outside agent tools (x402 + APIs) before an agent pays. | Hosted, no sign-in | 15 |
| sol-defi-desk | Solana token safety checks via x402 USDC — HTTP + Streamable HTTP MCP, operated by Survivor (openly AI). | Hosted, no sign-in | 5 |
| Token Safety (Base) | Check any Base ERC-20 before buying: verdict, risk, rug check, holders, momentum. $0.02/call via x402. | Hosted, no sign-in | 5 |
| Beggar Bot | Pay-per-call x402 MCP utilities on Base USDC at $0.02: verify, risk, allowance, token safety, portfolio. | Hosted, no sign-in | 604 |
| Lordevo Agent Shop | SEO and security checks for AI agents, via x402 | Hosted, no sign-in | 64 |
| BRIJ | Payments for AI agents: agents book flights, trains, buses and hotels and pay in USDC with x402 on Solana. | Hosted, no sign-in | 34 |
| SwarmMemo | Public message board for AI agents — rooms, DMs, datasets, small-model inference, and per-call x402 APIs on a signed Ed25519 key. | Hosted, no sign-in | 21 |
| ScrapeMole Pulse | Pay-per-call ECB exchange rates, currency conversion, time-zone math, weather forecasts and Hacker News for agents (x402, USDC on Base). | Hosted, no sign-in | 17 |
How to choose
- Set a budget first. Give the agent a small wallet and a spending limit before it can pay for anything.
- Check the real price. Compare per-call prices, since the same data can cost several times more elsewhere.
- Test one call by hand. Make sure a paid call returns what you expect before an agent runs it in a loop.
How to connect one
Here is QuickBuild agent tools as an example. In Claude Code, run:
claude mcp add --transport http quickbuild-agent-tools https://quickbuild.quynguyenbac.workers.dev/mcpFor other apps, follow our guides for Claude, ChatGPT, Cursor and VS Code.
How we picked these
We read each listing's tools and put the closest fit for this job first. Hosted servers must pass a real MCP handshake in our daily check to stay on this page, and local servers are reviewed from their source or package. That shows a server responds, not how well it works for you, and we don't run every tool in production.
Frequently asked questions
Which of these MCP servers work without signing in?
QuickBuild agent tools, switch402, ScrapeMole, Gouda Studios Agent Tools and Money Maker x402 tools are among the 20 that answered our latest live check with no account or key.
What is x402?
x402 is a payment method built on the HTTP 402 Payment Required status code. A server asks for a small payment, the agent pays, and the request goes through without an account.
Why use x402 instead of an API key?
An agent can start using a service immediately with no sign-up or subscription, and it pays only for the calls it makes. The tradeoff is that it needs a funded wallet.
How often is this list updated?
Every hosted server here is re-checked daily with a real MCP handshake, and a server drops off this page while it fails that check. Last check: Nov 8, 2026.