JSON-RPC 2.0 & MCP Server Testing
Test JSON-RPC services and Model Context Protocol servers alongside your REST, SOAP, and GraphQL APIs.
What It Does
JSON-RPC 2.0 and MCP testing extends Shift-Left Studio beyond REST, SOAP, and GraphQL. JSON-RPC services are described by OpenRPC documents rather than OpenAPI, and MCP servers describe their capabilities as tools; the platform understands both. Once imported or discovered, each method or tool becomes an endpoint you can build tests for, with assertions designed for the JSON-RPC response: a successful result on one side, a structured error on the other. That lets you check that a tool returns what your agents expect and that invalid calls are rejected cleanly.
Overview
Bring JSON-RPC 2.0 services and Model Context Protocol (MCP) servers into the same testing platform as the rest of your APIs. Import an OpenRPC document, or point Shift-Left Studio at an MCP server and discover its tools as testable endpoints. Dedicated assertions check JSON-RPC results and errors, so a test can verify both that a call returns the right result and that a bad call fails with the right error. As teams ship AI agents that depend on MCP tools, those tools need the same regression coverage as any other API. Available in Trial and Enterprise editions.
Key Capabilities
How It Works
- 1
Import an OpenRPC document, or connect to an MCP server to discover its tools
- 2
Each method or tool appears as a testable endpoint in your project
- 3
Build tests with dedicated assertions for results and errors
- 4
Run the tests and review the results as you would for any other endpoint
Available on
enterprise Plan & Above
Upgrade to the enterprise plan to unlock this feature.
Go deeper
Guides and playbooks that show this capability in practice.
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