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Detect breaking changes and generate structured diffs between OpenAPI specifications.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 8 days ago Due for re-check
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The oasdiff MCP server exposes 4 tools, focused primarily on general-purpose capabilities. Its published description reads: "Detect breaking changes and generate structured diffs between OpenAPI specifications". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates oasdiff F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Cross-tool shadowing" and "Cross-tool shadowing". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check oasdiff's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add oasdiff to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://api.oasdiff.com/mcpStreamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
Detect breaking API changes between two OpenAPI specifications. Pass the base (old) and revision (new) specs as YAML or JSON; returns the breaking and warning-level changes. Use this when the question
Produce a full changelog of every detected change between two OpenAPI specifications (base vs revision), down to informational changes. Pass both specs as YAML or JSON. Use this when you want the comp
Show the structural diff between two OpenAPI specifications (base vs revision): what was added, removed, or modified. Pass both specs as YAML or JSON. Use this when you want the raw structural changes
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: oasdiff_breaking_changes
A tool description tries to alter the model’s use of another tool.
ng clients. Use oasdiff_changelog instead to list every change including non-breaRecommendationDescriptions must describe only their own tool.
tool: oasdiff_changelog
A tool description tries to alter the model’s use of another tool.
y severity. Use oasdiff_breaking_changes instead when you only care whether the change iRecommendationDescriptions must describe only their own tool.
tool: oasdiff_diff
A tool description tries to alter the model’s use of another tool.
ty verdict. Use oasdiff_breaking_changes to judge whether changes break clients, or oasdRecommendationDescriptions must describe only their own tool.
tool: oasdiff_validate
A tool description tries to alter the model’s use of another tool.
two specs, use oasdiff_breaking_changes, oasdiff_changelog, or oasdiff_diff instead. ThRecommendationDescriptions must describe only their own tool.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: oasdiff_changelog
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "oasdiff_changelog"RecommendationScope tools to the minimum needed.
Vantaj uptime monitoring via MCP — manage monitors, heartbeats, incidents, and status pages.
Unified gateway to Algeria's TKAWEN ecosystem: commerce, certification, and AI tools.
Provides access to the Cohereon Doctrine AI safety framework with governance components, tiered access, and agent onboarding.
Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Validate a single OpenAPI specification against the OpenAPI and JSON Schema rules. Pass the spec as YAML or JSON; returns the findings (empty when the spec is valid). Use this when you have one spec a