SnapDiff MCP — Watchlist

MCP100 Assessment

Watchlist / Tracking

Why we’re tracking it

Follow-up value is specific to SnapDiff visual comparison and screenshot tools: Do change percentages retain reproducible capture settings when the remote rendering engine changes?

Reviewed Oct 5, 2026 · Documentation review; complete setup workflow not independently tested

Best fit

Intent-aware visual regression checking, screenshot capture and HTML-to-image rendering for coding agents.

What we know

Standalone stdio MCP over SnapDiff's REST API, exposing UI-change verification, page diffs, screenshots and HTML/CSS rendering. Hosted MCP exposes the same schema.

Maintenance / activity evidence

@corralimited/snapdiff-mcp 0.5.0 published 2026-09-11T06:48:33.193Z

Tracking evidence observed Oct 5, 2026. These dated signals do not establish current maintenance. Reviewed enrichment confidence: high.

Verification gaps / watch-outs

Installation and comprehensive security have not been independently audited.
Read/capture/visual-compare authority; no arbitrary source-code mutation.
API key.
Sensitive access: Screenshots of internal apps, Target URLs, Rendered HTML content

Testing-oriented; use caution with private/internal URLs and screenshots.

Full authority, access and evidence limits are available in Review context and Access & risk.

All limitations / Review context

Do change percentages retain reproducible capture settings when the remote rendering engine changes?

The bounded review of the publisher's documented SnapDiff visual comparison and screenshot tools and release notices identified no disclosed material condition preventing an accurately scoped public tracking entry. The resource's operational permissions remain uncertainty; this assessment does not certify installation safety.

Testing-oriented; use caution with private/internal URLs and screenshots.
Read/capture/visual-compare authority; no arbitrary source-code mutation.
API key.
Target URLs/screenshots/rendered HTML are processed by SnapDiff.
Sensitive access: Screenshots of internal apps, Target URLs, Rendered HTML content
Installation, client compatibility and comprehensive security have not been independently audited. Authentication and access depend on the configured services.
Runtime behavior, dependencies and undisclosed vulnerabilities were not independently audited.
Documented tool authority and any remote data handling must be checked before installation or use.
Tool inventory, client matrix and permissions completeness were not requirements for this Radar tracking review.
Requires SnapDiff API key.
Visual diffs are evidence, not proof of functional correctness.
Hosted API processes page URLs/screenshots and may access development URLs according to tool inputs.

Original activity observations

@corralimited/snapdiff-mcp 0.5.0 published 2026-09-11T06:48:33.193Z

Technical identity

npm/@corralimited/snapdiff-mcp

Exact implementation source: https://www.npmjs.com/package/@corralimited/snapdiff-mcp ↗
Reviewed resource type: Testing / Debugging
Repository identity: corralimited/snapdiff-mcp
Package identity: npm:@corralimited/snapdiff-mcp
Service endpoint: https://mcp.snapdiff.ai/mcp

Evidence & Sources

Evidence basis: Recorded source evidence
Setup runtime verification: Not independently runtime-tested by MCP100 for this setup workflow.

Reviewed Oct 5, 2026 · Latest source observation Oct 8, 2026

Package registry ↗
@corralimited/snapdiff-mcp
Recorded package identity, distribution or download evidence.
Includes references whose attribution is not established.
Evidence source ↗
snapdiff.ai/blog/catching-ai-agent-ui-drift
Source material retained for this review.
Includes references whose attribution is not established.

Setup · Watchlist

Testing / Debugging setup

Publisher instructions.

Source evidence observed Oct 14, 2026.

Additional setup details required — see the specific gaps below.

Install / connect
Publisher instructions
Publisher documents `claude mcp add snapdiff -e SNAPDIFF_API_KEY=... -- npx -y @corralimited/snapdiff-mcp` and hosted https://mcp.snapdiff.ai/mcp.
publisher sdk or product install · Claude Code only · Publisher instructions
claude mcp add snapdiff -e SNAPDIFF_API_KEY=YOUR_API_KEY -- npx -y @corralimited/snapdiff-mcp
Configure / authenticate
MCP100 setup guide
Publisher: `claude mcp add snapdiff -e SNAPDIFF_API_KEY=<key> -- npx -y @corralimited/snapdiff-mcp`.
Check connection
Suggested check
Verify read-only metadata or project listing; do not trigger screenshot credits without approval.
Remove / uninstall / revoke
MCP100 setup guide
For a Claude Code registration named `radar-2fd1fd1f68113deb17fe58378424216573ceba570a9672ca3538a1ec6ac1d5b7`, run `claude mcp remove radar-2fd1fd1f68113deb17fe58378424216573ceba570a9672ca3538a1ec6ac1d5b7`; otherwise remove the exact entry in the chosen MCP client settings and restart/reconnect. This client-host removal command is MCP100-composed from Claude Code lifecycle documentation, not a vendor-authored uninstall. With `npx`, a separate global package uninstall normally is unnecessary. Do not delete provider data or credentials by default.
Client unregister, package uninstall, data deletion, and OAuth/API token/wallet permissions are distinct.
Remove client registration · Claude Code only · MCP100 composed guide
claude mcp remove radar-2fd1fd1f68113deb17fe58378424216573ceba570a9672ca3538a1ec6ac1d5b7

Official Documentation & Sources

What it does

Standalone stdio MCP over SnapDiff's REST API, exposing UI-change verification, page diffs, screenshots and HTML/CSS rendering. Hosted MCP exposes the same schema.

Capability: Security & Testing
Resource type: Testing / Debugging
Best fit: Intent-aware visual regression checking, screenshot capture and HTML-to-image rendering for coding agents.

Representative uses

Verify UI change against baseline/intent
Compare two pages visually
Capture screenshot
Render HTML/CSS to image

Limitations

Requires SnapDiff API key.
Visual diffs are evidence, not proof of functional correctness.
Hosted API processes page URLs/screenshots and may access development URLs according to tool inputs.

Reviewed access

Access & risk

Review the exact access boundary before connecting this MCP to accounts, credentials, or sensitive data.

Authentication: API key.
Permissions: Read/capture/visual-compare authority; no arbitrary source-code mutation.
Data handling: Target URLs/screenshots/rendered HTML are processed by SnapDiff.
Cost: freemium
Risk and cautions: Testing-oriented; use caution with private/internal URLs and screenshots.

Access scope and cautions

Write actions: None in the reviewed inventory
Sensitive access: Screenshots of internal apps Target URLs Rendered HTML content
Risk level: moderate

FAQ

Based on reviewed evidence as of 2026-10-08. Watchlist tracking is not a recommendation or a security certification.

Which tasks are documented for this implementation?

The reviewed tasks include: Verify UI change against baseline/intent; Compare two pages visually; Capture screenshot; Render HTML/CSS to image.

What setup and authentication are documented?

Recorded installation/entrypoint step: npx -y @corralimited/snapdiff-mcp. Recorded endpoint: https://mcp.snapdiff.ai/mcp. Recorded transport: stdio, streamable_http. Recorded environment-variable notes: SNAPDIFF_API_KEY; SNAPDIFF_API_URL (optional). No configuration values are supplied here. Prerequisites: MCP client. These are the documented setup details, not a claim that installation or client compatibility was independently tested. Authentication: SnapDiff API key.

Can it modify data or perform write operations?

The reviewed inventory lists no write actions. An empty inventory alone does not establish read-only authority. Recorded permission boundary: Read/capture/visual-compare authority; no arbitrary source-code mutation.

What data-handling boundary should I consider?

Target URLs/screenshots/rendered HTML are processed by SnapDiff. Recorded sensitive-access context: Screenshots of internal apps; Target URLs; Rendered HTML content.

What limitations and risks should I check before use?

Testing-oriented; use caution with private/internal URLs and screenshots. Requires SnapDiff API key. Visual diffs are evidence, not proof of functional correctness. Hosted API processes page URLs/screenshots and may access development URLs according to tool inputs. Runtime behavior, dependencies and undisclosed vulnerabilities were not independently audited. Documented tool authority and any remote data handling must be checked before installation or use.