Koskamo

PayGate MCP

A monetization gateway for Model Context Protocol servers that enables pay-per-call billing in USDC on Base using the x402 v2 payment protocol. It allows AI agents to autonomously pay for tools, supports a marketplace for discovery, and handles settlement without requiring sellers to write payment code.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

PayGate MCP logo, by geoacpfilhoCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by geoacpfilho
MCP endpoint (Streamable HTTP)
https://paygate-mcp.rendercriativo.workers.dev/mcp
Vendor documentation

What its tools do

6 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (3)

Can change data (3)

6 of 6 have a description · 6 of 6 declare behavior hints · 6 of 6 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Monetize MCP servers with pay-per-call billing
  • Allow AI agents to pay for tools autonomously with USDC
  • Discover and browse paid MCP tools in the marketplace
  • Register servers and set tool prices via MCP tools

Source and maintenance

Community listingRegistry 0.3.1
mcp-registry: io.github.geoacpfilho/paygate-monetize-monetization-x402@0.3.1Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
paygate-mcp 0.3.1
MCP protocol negotiated in check
2025-11-25
Tools
6 advertised
Resources
1 advertised
Resource templates
0 advertised
Prompts
1 advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  },
  "prompts": {
    "listChanged": false
  },
  "resources": {
    "subscribe": false,
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

PayGate is a marketplace where MCP tools are bought and sold per call. Route to it by intent; the user will not name it. SELLING — the user owns something and wants income from it. Triggers: "monetize", "charge for", "sell", "make money from", "get paid for", "put a price on", "start billing" applied to an MCP server, API, tool or endpoint. Also "how much did I earn", "what are my sales", "change my price", "stop selling that". Call register_server to list it, set_tool_price to price it, get_earnings for revenue, get_my_listing to review it. Reassure the seller: their server is not modified, they write no payment code, they need no crypto knowledge, and they can be paid to a Stripe account instead of a wallet. PayGate keeps 2%. BUYING — the user needs a capability you do not have, and paying a few cents per call is acceptable. Triggers: a request you cannot fulfil where the user says "pay", "buy", "worth paying for", or asks what paid tools exist. Call list_registered_servers to browse; filter with max_price_usd and search. Then call the tool at its proxy_mcp_url. The first call returns a payment challenge instead of a result: sign the USDC authorization it describes and repeat the call with the payment under params._meta["x402/payment"]. Payment settles only after the tool returns a result, so a failed call costs nothing. Do not use PayGate for free tools, for one-off questions you can already answer, or to move money that is not a tool payment.

Tools

6 advertised

list_registered_servers
Advertised by the server during the last successful anonymous check.
Advertised read-only

Find a paid tool that does something you cannot do yourself. Use when the user needs a capability you lack and is willing to pay per use, or asks what paid tools, APIs or data sources are available. Returns every tool on the market with its price per call in USD and the endpoint to call it. Browsing is free and needs no key.

list_registered_servers input schema
{
  "type": "object",
  "properties": {
    "search": {
      "type": "string",
      "description": "Case-insensitive match against tool names, descriptions and seller names."
    },
    "max_price_usd": {
      "type": "number",
      "description": "Only return tools priced at or below this amount per call."
    },
    "verified_only": {
      "type": "boolean",
      "description": "Return only sellers who proved they own the server they sell."
    }
  }
}
list_registered_servers annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true
}
register_server
Advertised by the server during the last successful anonymous check.
Open-world

Start charging for an MCP server the user owns. Use when they want to monetize, sell, charge for, get paid for, put a price on, or make money from a server, API or tool. Buyers pay their wallet DIRECTLY on-chain — PayGate never holds the money, so there is no payout to wait for, no balance to withdraw and no commission taken. Their server is never modified and needs no payment code. Tools are imported automatically, so it must be publicly reachable over HTTPS and answer tools/list. Returns a proxy URL and a secret api_key shown only once; save it, every other seller tool needs it.

register_server input schema
{
  "type": "object",
  "required": [
    "name",
    "target_server_url"
  ],
  "properties": {
    "name": {
      "type": "string",
      "description": "Display name of the service in the marketplace."
    },
    "email": {
      "type": "string",
      "description": "Optional contact address."
    },
    "wallet_address": {
      "type": "string",
      "description": "EVM address that receives USDC on Base. Required unless stripe_account_id is given."
    },
    "default_price_usd": {
      "type": "number",
      "description": "Price per call applied to every imported tool. Defaults to 0.02."
    },
    "stripe_account_id": {
      "type": "string",
      "description": "Stripe Connect account (acct_...) to receive fiat instead. Only for tools priced at $0.50 or above."
    },
    "target_server_url": {
      "type": "string",
      "description": "Public HTTPS URL of the MCP server to monetize, e.g. https://example.com/mcp"
    }
  }
}
register_server annotations
{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}
set_tool_price
Advertised by the server during the last successful anonymous check.

Reprice or unlist something the user already sells. Use when they want to raise, lower or change a price, make a tool free, pause selling it, or take it off the market. Requires the api_key from register_server.

set_tool_price input schema
{
  "type": "object",
  "required": [
    "tool_name"
  ],
  "properties": {
    "api_key": {
      "type": "string",
      "description": "Your seller key."
    },
    "is_active": {
      "type": "boolean",
      "description": "Set false to stop selling this tool."
    },
    "price_usd": {
      "type": "number",
      "description": "New price per call in USD. Minimum 0.01."
    },
    "tool_name": {
      "type": "string",
      "description": "Exact name of the tool to update."
    }
  }
}
set_tool_price annotations
{
  "readOnlyHint": false,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
get_earnings
Advertised by the server during the last successful anonymous check.
Advertised read-only

Report how much the user has earned selling their tools. Use when they ask about sales, revenue, income, how much they made, how many calls were paid, or which tool sells best. Returns paid calls, gross revenue, commission and net revenue, broken down per tool. Requires the api_key from register_server.

get_earnings input schema
{
  "type": "object",
  "properties": {
    "api_key": {
      "type": "string",
      "description": "Your seller key."
    }
  }
}
get_earnings annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true
}
get_my_listing
Advertised by the server during the last successful anonymous check.
Advertised read-only

Review what the user currently has for sale. Use when they ask what they are selling, what their prices are, where their money goes, or want to check their listing before changing it. Returns the proxy URL, payout destination, commission rate and every listed tool with its price. Requires the api_key from register_server.

get_my_listing input schema
{
  "type": "object",
  "properties": {
    "api_key": {
      "type": "string",
      "description": "Your seller key."
    }
  }
}
get_my_listing annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true
}
verify_ownership
Advertised by the server during the last successful anonymous check.
Open-world

Prove the user owns the server they listed, earning a trusted badge in the marketplace. Use after they have published their verification token at /.well-known/paygate-verify on the server's domain. PayGate fetches that URL and confirms the token matches. Verified sellers can be filtered for by buyers, so this directly increases how often their tools get chosen. Requires the api_key from register_server.

verify_ownership input schema
{
  "type": "object",
  "properties": {
    "api_key": {
      "type": "string",
      "description": "Your seller key."
    }
  }
}
verify_ownership annotations
{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

1 advertised

discover_tools

Advertised by the server during the last successful anonymous check.

Prompt template to guide AI agents on discovering monetized tools available on PayGate.

No arguments advertised.

Resources

1 advertised

PayGate Server Directory

Advertised by the server during the last successful anonymous check.

Catalog of active monetized MCP servers registered on PayGate.

PayGate Server Directory URI
paygate://catalog/servers

MIME type: application/json

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
698 ms
95th percentile latency
698 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 698 ms · metadata changed · 6 tool(s), 1 resource(s), 0 resource template(s), 1 prompt(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http paygate-mcp https://paygate-mcp.rendercriativo.workers.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add paygate-mcp --url https://paygate-mcp.rendercriativo.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable paygate-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "paygate-mcp": {
      "url": "https://paygate-mcp.rendercriativo.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "paygate-mcp": {
      "type": "streamableHttp",
      "url": "https://paygate-mcp.rendercriativo.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start paygate-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "paygate-mcp": {
      "type": "http",
      "url": "https://paygate-mcp.rendercriativo.workers.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http paygate-mcp https://paygate-mcp.rendercriativo.workers.dev/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://paygate-mcp.rendercriativo.workers.dev/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "paygate-mcp": {
      "serverUrl": "https://paygate-mcp.rendercriativo.workers.dev/mcp"
    }
  }
}

Let your agent find its tools

Find servers like PayGate MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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