MCP Server Integration for API Testing
The Shift-Left API MCP server connects Claude, Cursor or another MCP client to your projects, with 17 tools, 3 resources and 4 prompts. An agent can import a spec, generate tests (no LLM by default), run them against a non-production environment and read results, with its key owner's permissions. Production runs are refused unless you allow them.
Status: available as of build 2.0.96.231 (September 2026). See the release notes and the MCP Server documentation.
Why an MCP server
The Model Context Protocol is the standard interface between AI agents and the systems they need to operate on. For API testing, MCP changes the workflow shape: instead of leaving your editor, opening a testing platform, and clicking through it, the agent works with the platform from inside the conversation.
ReadyAPI, Tricentis Tosca and Parasoft SOAtest each now offer an MCP server or plugin of their own. Check each vendor's documentation for what its MCP interface covers and which licence it needs; Shift-Left API's MCP server is one of several options.
Connect the agent you already use
Claude, Cursor, or another client that speaks the Model Context Protocol can connect to Shift-Left API.
Shipped in build 2.0.96.231
The MCP server for AI agents is part of the September 2026 release. The release notes list everything that changed in that build.
Not the same as MCP testing
The same release added JSON-RPC 2.0 / MCP testing, which tests your own MCP server by discovering its tools as testable endpoints (Trial and Enterprise editions). The MCP server on this page is the other direction: your agent works with Shift-Left API.
REST API still available
Scripts, pipelines, and agent frameworks that make plain HTTP calls can keep using the public REST API to trigger runs, poll status, and fetch results.
Prefer plain HTTP? Use the REST API
Shift-Left API also has a public REST API — authenticate, trigger a test run pack, poll for status, and fetch results. Scripts, pipelines, and agent frameworks that support custom HTTP tool calls can use it directly. See the integrations overview for the working curl example and full endpoint list.
MCP server — frequently asked questions
Is the Shift-Left API MCP server available today?
Yes. The MCP server for AI agents shipped in the September 2026 release (build 2.0.96.231). It lets you connect Claude, Cursor, or another MCP client to Shift-Left API. See the release notes and the MCP Server article in the product documentation.
What is the Model Context Protocol (MCP)?
MCP is an open protocol introduced by Anthropic in late 2024 that lets AI agents connect to external systems through a standard tool/resource interface. An MCP server exposes tools (callable actions) and resources (readable data); an MCP client (Claude Desktop, Cursor, or any agent runtime that speaks the protocol) discovers and uses them.
Is the MCP server the same as JSON-RPC 2.0 / MCP testing?
No. The MCP server lets an AI agent connect to Shift-Left API. JSON-RPC 2.0 / MCP testing is a protocol you test: Shift-Left API imports an OpenRPC document or discovers a Model Context Protocol server’s tools as testable endpoints, with assertions for results and errors. JSON-RPC 2.0 / MCP testing is available in Trial and Enterprise editions.
Can I still drive API testing from an agent through the REST API?
Yes. The public REST API (authenticate, trigger test run packs, poll status, fetch results — see the integrations overview) works from any agent or script that can make HTTP calls, including agent frameworks that support custom tool definitions.
Where do I find setup details?
Start with the MCP Server article in the product documentation and the September 2026 release notes. If you need help connecting a specific client, ask your account contact.
Start testing today
Start a 15-day trial, or use Professional or Enterprise. The MCP server, GitHub Actions, Jenkins, Azure DevOps and the public REST API are ready now.