SnagRelay MCP server

SnagRelay for coding agents

Your users find the bugs. Your agent fixes them. Give Cursor, Claude Code or Codex a ticket key and it reads the evidence a human debugger would open: the broken element, console errors with file and line, failing requests with their request and response bodies, repro steps and a short replay.

This repo is the listing and distribution repo for the SnagRelay MCP server. It holds the plugin manifests for each agent platform, the shared skills and the registry entry. The MCP server itself is hosted by SnagRelay at https://mcp.snagrelay.com/v1.

Connect

Sign-in is OAuth. A SnagRelay page opens in your browser, you click Allow, and there is no token to copy.

Client	Install
Cursor	Open Customize → Marketplace, search SnagRelay, install, then click Needs authentication on the snagrelay MCP server
Claude Code	claude plugin marketplace add snagrelay/agent-plugin then claude plugin install snagrelay@snagrelay. Run /mcp and authenticate snagrelay
Codex	codex plugin marketplace add snagrelay/agent-plugin then codex plugin add snagrelay@snagrelay. Sign in with codex mcp login snagrelay
Lovable	Settings → Connectors → search SnagRelay, or add a custom MCP server with the URL below
Bolt	Add a custom remote MCP connector with the URL below
Replit	Add a custom MCP server with the URL below
Anything else	Point any Streamable HTTP MCP client at https://mcp.snagrelay.com/v1

Lovable, Bolt and Replit guides are being written; the custom-connector route works today.

For CI, scripts and other headless clients, create an API token in SnagRelay (Settings → API tokens) and send Authorization: Bearer <token> to the same URL.

Which URL?

All four share one server and one sign-in. Pick the narrowest one that fits.

URL	Use it when
https://mcp.snagrelay.com/v1	You work across projects. The default
https://mcp.snagrelay.com/v1/readonly	You want the agent to read issues but never write. The write tools (report_progress, mark_issue_resolved) are removed and blocked. Good for security-conscious teams and shared machines
https://mcp.snagrelay.com/v1/{projectId}	This repo belongs to one SnagRelay project. Hard-scoped, so the agent cannot see other projects
https://mcp.snagrelay.com/v1/{projectId}/readonly	Both of the above

{projectId} is the number from whoami, or from the project's URL in SnagRelay.

Tools

Tool	Access	What it does
get_issue_context	read	Full context of one issue by key: the element, repro steps, console errors with file and line, requests with bodies, and a screenshot resource link
get_issue_payload	read	One full request or response body, or one console entry, by the index from get_issue_context
get_related_history	read	Earlier resolved issues on the same screen or endpoint, with the PR that fixed them
find_issues	read	List or search issues when you have no key
whoami	read	Signed-in account, plan and accessible projects
report_progress	write	Tells SnagRelay which file the agent is editing
mark_issue_resolved	write	Marks an issue resolved with the PR, commit and branch. Optionally emails the reporter

One resource: screenshot, the issue's screenshot, read with resources/read.

Every tool carries MCP annotations (readOnlyHint, destructiveHint, idempotentHint, openWorldHint). None is destructive. The agent is instructed not to call mark_issue_resolved before you have reviewed the fix.

Usage

fix PROJ-123
-> get_issue_context("PROJ-123")
-> reads the failing request and its response body, the console error with file and line, the repro steps
-> get_related_history: has this broken before, and what fixed it?
-> proposes a targeted fix on feature/PROJ-123-<summary>

Skills

Six skills, written once in skills/ and used by every client.

Skill	What it does
fix-issue	Load context and fix a SnagRelay issue on a branch, then stop for your review
open-pr	Branch feature/{key}-{summary}, PR title [{key}] {type}: {description}, full description
resolve-issue	Commit and open a PR if needed, then mark the issue resolved
triage	List open issues so you can pick one
connect	Diagnose a broken MCP connection
scope	When the agent may (and may not) call SnagRelay

Cursor also gets rules/snagrelay-context.mdc, which tells the agent to load an issue's context before proposing a fix.

Claude Code namespaces plugin skills: run /snagrelay:fix-issue PROJ-123. In Cursor and Codex, say fix PROJ-123 or use /fix-issue.

Data and privacy

The agent receives what your users' widget captured on the page: element, console, network, replay and screenshot. Secrets are stripped on the server before anything reaches the agent: authorization and cookie headers, API keys, tokens, passwords, CSRF values, secret-looking query and form parameters, bearer tokens, JWTs and long hex or base64 strings. Issues are visible to the agent only as long as your plan's history window (history_days) allows. See TELEMETRY.md for the full list and SECURITY.md to report a vulnerability.

This repo contains no code that runs on your machine: only manifests, skills, a rule and a remote MCP URL.

Requirements

• A SnagRelay account. The free plan includes the MCP server, network bodies and 1 project. See pricing
• Cursor, Claude Code, Codex, or any MCP client that supports Streamable HTTP with OAuth

Links

Website · Docs · Pricing · Support · Privacy · Terms

Contributing

Edit skills/ and rules/, never the manifests by hand: see AGENTS.md. MIT licensed.