Paid MCP servers that accept USDC: x402 pay-per-call MCP tools for AI agents

A paid MCP server is a Model Context Protocol server whose tools cost money per call. With x402, the server answers a tool call with a payment request, the agent pays a few cents or less in USDC, and the tool runs. No account, subscription or API key is needed.

Below are the services in our directory that offer MCP access and take crypto payments. Each one is a verified YourAITools listing (live payment terms checked on the date shown), and its own homepage mentioned MCP when we fetched it on 2026-10-22. The descriptions come from each provider’s own site. They are listed alphabetically, and none of them paid to be here.

MCP servers and tools you can pay per call

Prices are per call, from each provider’s 402 terms or listing. Many of these services expose dozens of tools at different prices, so the range covers all of them.

What each one offers

• 402post: Paid listings board for agents: post over HTTP or MCP, pay with x402, read as web, Markdown, JSON or RSS.
• agentutility: Groups of paid x402 utility endpoints for agents, settled in USDC on Base and callable over MCP.
• Anyway Possible: Checks an agent can run before it pays, cites or acts, over MCP and HTTP with x402 payments.
• Arch Tools: One API for about 60 agent tools (search, scraping, AI generation, OCR, crypto data), paid with credits or x402.
• AurelianFlo: OFAC wallet screening, batch sanctions checks and due-diligence documents, paid per call.
• Ausca: Metered APIs and MCP services agents can buy without accounts, with fixed prices and verifiable receipts.
• Bytemine: B2B contact and company data APIs for GTM teams and AI agents (enrichment, search, company intel), available over REST, MCP and CLI, with agent routes payable per call over x402.
• EU Compliance Tools: Around 40 agent tools over MCP and x402 for compliance, market and onchain decisions, including EU counterparty dossiers.
• Heurist: Agentic finance research platform; Heurist Mesh lets agents pay with x402 for financial datasets, APIs, MCP servers and agent skills.
• LONG Events: Search for events, schedules, artists, venues and organizers over MCP or REST, with paid calls over x402.
• Orthogonal: One account for agents to use search, scraping and enrichment APIs through a unified API, MCP server or CLI, paying per call.
• RobinX: Social trading signals for bots on Robinhood Chain, grading X callers against later price moves; API, MCP and x402.
• Run402: Open-source backend for AI and coding agents: Postgres, auth, storage, serverless functions and hosting, provisioned from a CLI, SDK or MCP.
• SameDayDesk: Custom build service for agent commerce: it delivers MCP servers, agent workflows, storefronts for machines and x402/MPP payment endpoints.
• SignalFuse: About a dozen MCP tools for trading agents (signals, sentiment, macro regime, search, code execution), paid in USDC on Base.
• Strale: Trust and quality layer for AI agents: 250+ tested data capabilities (company data, compliance checks, financial validation, address tools) across 27 countries, callable over REST, MCP, A2A or x402.
• Tanod: One MCP server and HTTP API with hundreds of tools and paid routes for agents (security checks, chain data, finance, documents).
• vrsai: Machine-readable services for autonomous systems over HTTPS and MCP, with explicit contracts.

Charge for your own MCP server

These listings help you put a price on MCP tools you run yourself, rather than selling tools of their own.

• AgentPay: Budget caps, cost estimates and session receipts for MCP servers and AI agents, enforced at the payment layer.
• Nevermined: Payments infrastructure for AI agents: metering, billing and settlement across MCP, x402 and A2A; compatible with x402, MPP and AP2.
• Pocket Network: Network where developers publish data APIs and are paid onchain per request by AI agents and MCP clients.
• Vercel x402-mcp: Vercel's x402-mcp package integrating x402 payments with Model Context Protocol servers and the Vercel AI SDK, so MCP tools can charge per call.

Once your server charges per call, get it in front of agents: see where to list an x402 API.

Our own MCP servers (disclosed)

We run ten small x402 APIs, and each has a free remote MCP server (preview tier) plus a local npm MCP package, with full results paid per call in USDC on Base. They are listed on our Built by us page and are not ranked with the tools above. Examples: StackDetect (what a website is built with), WebRead (URL to Markdown) and PayGuard (OFAC wallet screening).

Use from code: tested examples connect all nine servers to an OpenAI Agents SDK agent (Python) and a Vercel AI SDK agent (JavaScript). Walkthrough: add x402 trust checks to OpenAI Agents SDK and Vercel AI SDK agents.

How paying for an MCP tool works

1. Your agent calls a paid tool on the MCP server.
2. The server replies with x402 payment terms: price, network (often Base), token (usually USDC) and the payTo address.
3. An x402-capable client signs a USDC payment for exactly that amount, within the spending limit you set.
4. The server checks the payment through a facilitator and returns the tool result.

Set a per-call spending cap in your client, and only fund the agent’s wallet with what you are willing to spend. New to x402? Start with what is x402 and how to pay for an API with USDC.

How to choose

• One server or many tools. Aggregators (one MCP endpoint with many tools) save setup time. Single-purpose servers are easier to reason about and to cap.
• Free tier. Some servers have free discovery or preview tools. Try those before you fund a wallet.
• Network fit. Check that the server accepts payment on a network where your agent holds USDC.
• Trust. Tool descriptions are text that your agent reads. Treat a new server like any other dependency, and screen what it returns. See prompt-injection scanning.

Browse more: all listings, x402 APIs by price, or submit your MCP server (free).