# x402-gateway-mcp

> x402-gateway-mcp — marysbrain-x402-gateway-mcp. Use this tool when you need to access multiple endpoints of an x402 gateway with microtransaction-based payment and spend control. It solves the problem of costly or restricted API access by enabling real-time payments (USDC on Base) per call, with automatic tool discovery for streamlined integration. Ideal for use cases requiring flexible, pay-as-you-go API access with built-in spend guardrails.

Canonical page: https://skillsregistry.net/skills/marysbrain-x402-gateway-mcp  
JSON: https://api.skillsregistry.net/v1/skills/marysbrain-x402-gateway-mcp

## Description

Enables MCP clients to access all endpoints of an x402 gateway by paying real-time microtransactions (USDC on Base) per API call, with automatic tool discovery and spend guardrails.

## Trust

- **Trust score (0–1):** 0.68
- **Verification tier:** scanned
- **Last scanned:** 2026-08-30

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** api-integration
- **Updated:** 2026-08-30

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/s5v36fogf3)
- **Repository:** <https://github.com/Marysbrain/x402-gateway-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "marysbrain-x402-gateway-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/marysbrain-x402-gateway-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/marysbrain-x402-gateway-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt