Build, list, and get paid.
Practical guides to monetizing MCP servers and APIs for the agent economy.
A/B test pricing for agent-facing APIs
Agents read your price out of a 402 response, not a pricing page. That makes price experiments cheap to run and easy to measure — if you design them properly.
Accept x402 payments on a remote Streamable HTTP MCP server
Streamable HTTP gives every tool call a real HTTP request boundary — which is exactly where a 402 belongs. Here's how to gate a remote MCP server without breaking discovery.
Add authentication to your MCP server
API keys, OAuth 2.1, or payment-as-access with x402 — three different answers to three different questions. Pick by what you actually need to know about the caller.
Add x402 to an existing REST API
No MCP required. x402 is plain HTTP, so a payment layer drops in front of the routes you already have — and agents pay per request without ever asking for a key.
Add x402 payments to a Python MCP server
FastMCP's HTTP transport is ASGI underneath, which means payment gating is one middleware away. Return the 402, verify through a facilitator, run the tool.
Add x402 payments to your Node.js MCP server
Wrap the tools you want to charge for, leave the rest of the server alone. Agents pay in USDC before your handler runs — step by step.
Avoid pricing mistakes when monetizing for AI agents
Agents don't haggle, churn, or complain — they just stop calling. The five pricing errors that quietly zero out a listing's revenue, and how to catch each one.
Build a revenue stream from your open-source MCP server.
Keep the repo MIT-licensed and free. Add a hosted endpoint that charges agents per call in USDC over x402, and list it on Loomal — no fork, no license change, no paywall on the code.
Build an MCP server in TypeScript
The official SDK, zod schemas, both transports, and an npm package users can run with a single npx command — the full path from code to distribution.
Build an MCP server in Python with FastMCP
Decorators in, protocol out. FastMCP turns typed Python functions into MCP tools, resources, and prompts — with the JSON-RPC plumbing handled for you.
Build your first MCP server: a beginner's guide
From empty folder to a tool Claude Desktop can actually call — one file of TypeScript, one config entry, and a clear picture of what's happening underneath.
Bundling multiple tools into one paid MCP server.
One server with five tools, or five servers with one tool each? The answer depends on who calls them together — and you can price each tool differently either way.
Claim your MCP server listing on Loomal.
Loomal auto-indexes MCP servers from the official registry, so yours is probably already listed — unclaimed. Proving GitHub ownership takes about two minutes and makes the listing yours.
Connect Claude Desktop to any MCP server.
Local servers go in claude_desktop_config.json; remote servers connect by URL. The mechanics, the file paths, and the restart-and-logs ritual that fixes most failures.
Connect Cursor to a remote MCP server.
One URL in mcp.json and Cursor's agent can call tools running on someone else's infrastructure — including x402-paid endpoints. Here's the config, scoping, and the checklist when the dot stays red.
Convert an existing API into an MCP server.
Your REST API already does the work — agents just can't find or call it. A thin MCP wrapper fixes that, and the design decision that matters isn't code, it's which endpoints become tools.
Debug an MCP server with the MCP Inspector.
Stop debugging through a chat window. The Inspector calls your server's tools directly, shows the raw JSON-RPC both ways, and turns 'the agent isn't using my tool' into a diagnosable problem.
Deploy a remote MCP server agents can reach by URL.
From stdio process to Streamable HTTP endpoint: the stateless server pattern, where to host it, and the production checklist that makes the endpoint listable — and chargeable.
Freemium strategies for MCP servers in the agent economy.
Leave the cheap tools open, put the expensive ones behind x402. Because agents pay per call without signup friction, freemium for machines works differently — and better — than it did for humans.
Get your MCP server indexed faster on Loomal.
Loomal imports from the official MCP registry and ranks by signals you control. Here's how the pipeline decides what to index — and the shortcut that skips the queue entirely.
Getting Started with AI Agent Wallets give your agent a budget.
An agent wallet is a funded account your agent can spend from without a human approving each transaction. Here is what one is, how it holds funds, and how to keep it on a leash.
How AI Agents Will Pay for APIs in the Future from API keys to machine money.
API keys assume a human signed up first. Agents don't sign up. A look at the payment models competing to fill that gap — and why per-call stablecoin payments are winning the machine-to-machine lane.
How Much Should an API Call Cost an AI Agent? anchor it, don't guess it.
Per-call pricing has no pricing-page theater to hide behind — the number is the whole offer. Benchmarks by call type, and the reasoning to pick yours.
How to Handle Multi-Currency Pricing for x402 price in dollars, settle in tokens.
x402 can advertise more than one way to pay. Whether you should is a different question — how to think about USDC, other stablecoins, and other chains without making accounting your second job.
How to Handle Rate Limits in an MCP Server or price them away.
Agents retry harder than humans ever will. Classic rate limiting keeps your MCP server alive — and per-call pricing often does the same job with less code and better incentives.
How to List a New MCP Server on Loomal indexed, claimed, discoverable.
From zero to a live listing agents can find: check whether you're already indexed, claim or submit your server, and fill in the metadata that actually drives discovery.
How to List a Paid API Endpoint on Loomal no MCP server required.
You don't need to wrap your REST API in MCP to sell it to agents. Gate the endpoint with x402, list it on Loomal, and agents pay per call in USDC.
How to Monetize an MCP Server with x402 and USDC on Base free tool to paid endpoint, end to end.
The complete path: host your server over HTTP, put an x402 gate in front of it, pick a per-call price, and list it where paying agents can find it.
How to price your MCP server for AI agents.
A working framework: find your cost floor, estimate the value ceiling, pick a starting point between them, and let real call volume correct you. Agents compare prices programmatically — your number has to survive that.
Integrating x402 with AutoGen payments in the conversation.
AutoGen runs work as conversations between agents. When one of those agents needs a paid tool mid-conversation, x402 lets it pay per call — the design question is which agent holds the money.
Integrating x402 with CrewAI agents a crew with a budget.
CrewAI crews delegate work across multiple agents. When some of that work runs on paid MCP servers and APIs, the crew needs a wallet, a paying tool, and a budget that survives multi-step tasks.
Integrating x402 with LangChain agents tools that pay for themselves.
Give a LangChain agent a funded wallet and an x402-aware HTTP client, and every priced endpoint on the internet becomes a tool it can call mid-run — no API keys to provision.
Integrating x402 with LlamaIndex paid data, on demand.
LlamaIndex pipelines live or die on data quality. x402 lets an agent or query pipeline pull from premium, per-call-priced sources exactly when retrieval comes up short — paying cents, not committing to plans.
Integrating x402 with n8n workflows workflows that pay per call.
n8n can call MCP servers and any HTTP API — but its built-in nodes don't speak HTTP 402. Here's how to handle x402-priced endpoints inside a workflow, and where the wallet should live.
MCP Server Naming and Branding Best Practices for Discovery named for the query, not the logo.
Your MCP server has two audiences — humans searching registries and LLMs choosing tools. Both pick by words. Here is how to choose names and descriptions that get picked.
MCP Server Security Best Practices the caller is a language model.
Your MCP server executes arguments written by an LLM that read untrusted text. Validation, least privilege, isolation, and payment verification — the four layers that keep that safe.
Migrating an MCP Server from Stdio to Remote Hosting one process to one service.
A stdio server lives inside one user's client. A remote Streamable HTTP server serves everyone — and it's the form an MCP server must take before it can charge per call.
npm, PyPI, OCI, or remote: choosing how to ship your MCP server.
Each distribution format trades install friction against control. Only one of them can charge agents per call — here's how to pick, and why shipping two formats is often right.
Optimize your Loomal listing for discovery.
Your listing competes in search results, category pages, and agent queries. The description, tags, and tool list you publish decide whether it surfaces. Here's what actually moves the needle.
Pay-per-call vs subscription choosing a pricing model for your API.
Subscriptions, prepaid credits, and x402 pay-per-call each fit a different buyer. If your API serves both human developers and AI agents, the answer is usually a split — not a winner.
Publish your MCP server to the official registry.
One server.json manifest in the official MCP registry gets you indexed by Loomal and every other downstream catalog. The publish flow is a CLI login and one command — the work is getting the manifest right.
Securing your x402-enabled MCP server.
Payment gating removes some attack surface — no API keys to leak — and adds new surface of its own. Replay attempts, verification shortcuts, and paid-but-abusive traffic all need handling on top of the protocol.
Set pricing for your MCP server on Loomal.
Pricing on Loomal is deliberately simple: one per-call price, minimum $0.01, changed in one field whenever you like. Here's the mechanics — what the field does, what agents see, and where the money lands.
Set up an agent wallet for x402 payments.
An agent that pays for tools needs three things: a keypair, USDC on Base, and a runtime that answers 402 challenges automatically. The whole setup is an afternoon — most of it is deciding how to store the key.
Set up the Loomal console for your team.
When several people manage several monetized MCP servers, the questions stop being technical: who owns the claims, where does the money land, and who's allowed to change a price. Settle those before the first listing goes live.
Test x402 payment flows locally.
A pricing bug in production charges real money or gives work away free. Test the 402 challenge, the payment, and the receipt on your laptop and a testnet before a single mainnet cent moves.
The agent economy: how MCP and x402 work together
MCP gives agents hands; x402 gives them a wallet. Neither protocol alone produces an economy — together they close the loop from discovery to invocation to payment.
Tiered pricing for MCP servers open source, pay-per-call, enterprise.
Hobbyists, production agents, and enterprises want three different deals. The trick is serving all three without the cheap tier eating the expensive ones — and without pretending a marketplace listing can cost $0.
Track revenue from your Loomal listings.
Every paid call settles on-chain and carries a signed receipt, so your revenue numbers aren't estimates — they're verifiable. Here's how to read them, reconcile them, and turn them into pricing decisions.
Upload and sell a hosted file on Loomal no server required.
Drop a dataset, PDF, or model file into the console, set a per-call USDC price, and Loomal serves it at a paywalled URL. Buyers — human or agent — pay via x402 and download.
Verify ownership of a GitHub repository on Loomal claim what's yours.
Thousands of MCP server listings on Loomal were imported from the official registry, unclaimed. Here's exactly how Loomal confirms you control the repository behind one before handing you the listing.
Verify x402 payments with a facilitator no chain infra required.
Your server's job is to check a payment is real and get it settled — without running a node, watching mempools, or holding keys that can move funds. That's what a facilitator is for.
What is agentic commerce? a beginner's guide.
AI agents are starting to discover, evaluate, and pay for services without a human at the keyboard. Here's how that actually works — the protocols, the money, and where it stands today.
Write MCP server documentation that ranks on Google.
Most MCP servers are invisible in search because their README answers questions nobody types. Here's how to structure docs around the queries developers actually use.
x402 vs API keys migrating to pay-per-call.
API keys were built for humans who sign up once and subscribe. Agents don't sign up. Here's how to add x402 pay-per-call alongside your existing key system — without breaking a single current customer.