Ontario Protocol vs Event Resolver API

In-depth architectural comparison of the Ontario Protocol and Event Resolver API MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

O

Choose Ontario Protocol when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Ontario Protocol Details

Choose Event Resolver API when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Event Resolver API Details

Feature & Specification Comparison

Specification	O Ontario Protocol Finance & Fintech	Event Resolver API Finance & Fintech
Summary	x402 trust scans, readiness checks, and pre-payment verification for agents calling paid APIs.	Resolve prediction market events. Price checks, claim verification, outcome confidence.
Category & Scope	Finance & Fintech	Finance & Fintech

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "ontario-protocol": {
      "command": "npx",
      "args": [
        "-y",
        "ontario-protocol"
      ]
    }
  }
}

{
  "mcpServers": {
    "event-resolver-api": {
      "url": "https://event-resolver-production.up.railway.app/sse"
    }
  }
}

Related MCP Server Comparisons