by blackwell-systems · MCP Server · ★ 21
Test your MCP server against the real protocol. No mocks. No imports. No language lock-in. mcp-assert connects to your server exactly like Claude, Cursor, or any MCP client would: real stdio/SSE/HTTP transport, full initialize handshake, actual tool calls. It checks responses against expectations you define in YAML. If it passes mcp-assert, it works with every MCP client. [!WARNING] We scanned 102 MCP servers and found 4,794 schema issues (2,239 errors) across 55 servers including AWS, Serena, and Grafana. The most common failure: pa
| Stars | 21 |
| Forks | 1 |
| Language | Go |
| Category | MCP Server |
| License | MIT |
| Quality Score | 70.435413019087/100 |
| Last Updated | 2026-07-08 |
| Created | 2026-04-23 |
| Platforms | go, mcp |
| Est. Tokens | ~18k |
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mcp-assert is The testing standard for MCP servers. Lint (14 rules), test, and fuzz over real stdio/SSE/HTTP transport. 18 assertion types in YAML. Found 4,794 schema issues across 55 servers. Any language, no mock. It is categorized as a MCP Server with 21 GitHub stars.
mcp-assert is primarily written in Go. It covers topics such as ai-agents, assertions, ci.
You can find installation instructions and usage details in the mcp-assert GitHub repository at github.com/blackwell-systems/mcp-assert. The project has 21 stars and 1 forks, indicating an active community.
mcp-assert is released under the MIT license, making it free to use and modify according to the license terms.