---
title: "Cursor — MCP compatibility"
description: "Cursor's own table lists all three transports with no deprecation note on SSE, and marks the two HTTP transports as OAuth-capable. Variable interpolation works in the command, arguments, environment, URL, headers, and auth fields."
canonicalUrl: "https://zuplo.com/learn/mcp/compatibility/clients/cursor"
pageType: "mcp-client"
kind: "Editor"
verified: "2026-07-31"
---

# Cursor

> Cursor's own table lists all three transports with no deprecation note on SSE, and marks the two HTTP transports as OAuth-capable. Variable interpolation works in the command, arguments, environment, URL, headers, and auth fields.

_Editor. Protocol revision: Not published._

## Support

- **stdio** — Yes
- **Streamable HTTP** — Yes
- **Legacy HTTP+SSE** — Yes
- **Protocol revision** — Not published
- **Runs the OAuth flow** — Yes
- **Registration (RFC 7591)** — Yes
- **Metadata document** — Unknown
- **Pre-registered client ID** — Yes
- **Sends resource (RFC 8707)** — Unknown
- **Validates iss (RFC 9207)** — Unknown
- **Custom headers** — Partial

**Protocol revision.** Not published. Cursor is closed source, and neither its documentation nor its changelog states a revision.

## Caveats and sources

Each one names the column it qualifies and cites the page it comes from, which is often not the page in the row's primary source.

### Custom headers

Configured headers are ignored against any server that answers OAuth discovery, because Cursor starts the OAuth flow before it sends the request carrying your header. Cursor staff confirmed this as a bug in March 2026, reported it still reproducible in May 2026, and noted the internal ticket closed without a fix.

[Source](https://forum.cursor.com/t/mcp-headers-config-ignored-when-server-has-oauth-discovery/156054)

### Tool and prompt updates

Cursor staff describe list-changed notifications for tools, prompts, and resources as a known limitation: the subcapabilities aren't fully supported even when a server declares them.

[Source](https://forum.cursor.com/t/doubts-regarding-the-capabalities-negotiations/147888)

### Tool caps

A 40-tool cap is widely repeated for Cursor and isn't in any current documentation — it traces to 2025 forum threads. This page publishes no cap for Cursor for that reason.

[Source](https://cursor.com/docs/mcp)

[Primary source](https://cursor.com/docs/mcp)

_This row was last verified 2026-07-31 against the 2026-07-28 revision._

- **Clients** — [every client in the matrix](/learn/mcp/compatibility/clients)