MCP server

oasdiff Official

io.github.oasdiff/oasdiff

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

Working at last checkOfficial: oasdiff.com's GitHub account (oasdiff)About 936 tokens per request once connected4 tools

https://api.oasdiff.com/mcp

At a glance

Type: MCP server
Publisher: oasdiff.com (verified by the MCP Registry)
Status: Working at last check
Tools: 4
Token cost: About 936 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http oasdiff https://api.oasdiff.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.oasdiff]
url = "https://api.oasdiff.com/mcp"

Gemini CLI

{"mcpServers":{"oasdiff":{"httpUrl":"https://api.oasdiff.com/mcp"}}}

Cursor

{"mcpServers":{"oasdiff":{"url":"https://api.oasdiff.com/mcp"}}}

VS Code

{"servers":{"oasdiff":{"type":"http","url":"https://api.oasdiff.com/mcp"}}}

Antigravity

agy mcp add oasdiff https://api.oasdiff.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"oasdiff","server_url":"https://api.oasdiff.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"oasdiff","server_url":"https://api.oasdiff.com/mcp"}

oasdiff_breaking_changes ~266 tokens
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 is whether an API change breaks existing clients. Use oasdiff_changelog instead to list every chang
oasdiff_changelog ~250 tokens
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 complete set of changes at every severity. Use oasdiff_breaking_changes instead when you only care wheth
oasdiff_diff ~234 tokens
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 rather than a backward-compatibility verdict. Use oasdiff_breaking_changes to judge whether changes
oasdiff_validate ~186 tokens
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 and want to check it is well-formed. For comparing two specs, use oasdiff_breaking_changes, oasdiff_c

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