Bezlo MCP
NPM · BEZLO-MCP
Bezlo MCP: device-preset mobile screenshots, layout diagnostics, see-and-act sessions.
Available components
Last scanned (21 hours ago)
Scores higher than 37% of npm servers
Category Testing and QA
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 0 of 1 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 6 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability64
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1165 tokens (~89/item across 13 items; 13 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage81
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 44% of tool parameters carry a description.Partial
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "session_route_clear" implies "remove" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Oct 26 66
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Analysed npm/bezlo-mcp@0.1.2
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 1 package
| Packages resolved | 1 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
capture_matrix ~109
Capture the same URL on several device presets in one call (matrix). Returns each device screenshot + layout; use it to compare iPhone/iPad/Android side by side.
| Name | Type | Req | Description |
|---|---|---|---|
| devices | array | – | Device ids/names (1–6), e.g. ["iphone16","ipadpro11","px10"] |
| engine | string | – | – |
| fullPage | boolean | – | – |
| selector | string | – | – |
| url | string | yes | – |
| waitMs | number | – | – |
No output schema declared.
No examples provided.
capture_page ~206
Render a URL in Chrome for Testing with a real device preset (viewport, DPR, mobile UA/touch) and return a PNG screenshot plus layout diagnostics (horizontal overflow + offending elements, safe-area insets, media features, viewport/screen sizes). Use it to check mobile/web layouts, responsive bugs, and before/after fixes.
| Name | Type | Req | Description |
|---|---|---|---|
| darkMode | boolean | – | Render with prefers-color-scheme: dark |
| device | string | – | Device id or name, e.g. iphone16, "iPhone 15 Pro", ipadpro11, px10 (default iphone16) |
| fullPage | boolean | – | Capture the full scrollable page (default: viewport only) |
| scrollY | number | – | Scroll to this Y offset before capture |
| selector | string | – | Wait for this CSS selector before capture |
| url | string | yes | http(s) URL to render |
| waitMs | number | – | Extra wait after load before capture (default 1200) |
No output schema declared.
No examples provided.
inspect_page ~80
Same device-preset render as capture_page but returns only layout diagnostics (no image) — cheaper for quick overflow/safe-area checks.
| Name | Type | Req | Description |
|---|---|---|---|
| darkMode | boolean | – | – |
| device | string | – | – |
| scrollY | number | – | – |
| selector | string | – | – |
| url | string | yes | – |
| waitMs | number | – | – |
No output schema declared.
No examples provided.
list_devices ~49
List the Bezlo device presets (iPhone, Android, iPad, desktop) with width/height/dpr. Pass an optional category to filter.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | Optional category filter |
No output schema declared.
No examples provided.
list_sessions ~19
List open interactive sessions (id, url, device).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
run_flow ~179
Open a session, execute a list of actions in one call, and return a compact step report plus the final screenshot (optionally a screenshot per step). Use it to run a whole test flow: sign in, open a drawer, submit a form — then inspect the report.
| Name | Type | Req | Description |
|---|---|---|---|
| asserts | array | – | Assertions evaluated after the last step (same schema as session_assert checks) |
| device | string | – | – |
| engine | string | – | Chromium (default) records video; webkit is a Safari-flavoured approximation |
| record | boolean | – | Record a webm video of the flow (and a gif when ffmpeg is available) |
| screenshots | string | – | Save final only (default), every step, or none |
| steps | array | yes | Action objects, same schema as session_act action |
| url | string | yes | – |
No output schema declared.
No examples provided.
session_act ~100
Perform one action in a session and return the new observation (screenshot + elements + errors). Actions: click (index | text | selector | role+name | x+y), type (target + value + submit?), scroll (dy?), press (key), goto (url), back, reload, wait (ms). Prefer the `index` of an element from the latest observation.
| Name | Type | Req | Description |
|---|---|---|---|
| action | object | yes | – |
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_assert ~73
Assert checks against an open session and return pass/fail per check. Checks: visible, text (contains), inputValue (equals), urlIncludes, noOverflow, noConsoleErrors, elementCount (min). Use after actions to verify a flow.
| Name | Type | Req | Description |
|---|---|---|---|
| checks | array | yes | – |
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_end ~24
Close an interactive session and its browser.
| Name | Type | Req | Description |
|---|---|---|---|
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_observe ~47
Re-observe an open session: fresh screenshot, interactive element list, layout diagnostics, scroll position, and any console/page errors since the last call.
| Name | Type | Req | Description |
|---|---|---|---|
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_route ~93
Mock a network response for an open session (Playwright route). Give a URL pattern/glob and {status, json|body|contentType|headers} or {abort:true}. Use it to test error states without a real backend.
| Name | Type | Req | Description |
|---|---|---|---|
| pattern | string | yes | URL glob, e.g. **/api/items or **/missing.png |
| response | object | – | – |
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_route_clear ~25
Remove all network mocks from a session.
| Name | Type | Req | Description |
|---|---|---|---|
| sessionId | string | yes | – |
No output schema declared.
No examples provided.
session_start ~161
Open an interactive device session on a URL (iPhone/Android/iPad preset). Returns the first observation: screenshot, labeled interactive elements (refs e1..eN with selector/role/name/rect), layout diagnostics, and console/page errors. Use session_act to tap/type/scroll, then read the fresh observation it returns.
| Name | Type | Req | Description |
|---|---|---|---|
| darkMode | boolean | – | – |
| device | string | – | Device id or name (default iphone16) |
| engine | string | – | webkit gives a Safari-flavoured approximation (no recording/CDP a11y) |
| selector | string | – | Wait for this selector before observing |
| url | string | yes | – |
| waitMs | number | – | Wait after load before the first observation (default 800) |
No output schema declared.
No examples provided.
How do I install the Bezlo MCP server?
Bezlo MCP runs locally as an npm package, launched with npx -y bezlo-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · bezlo-mcp
claude mcp add gba3124-bezlo-mcp -- npx -y bezlo-mcp
What is the Bezlo MCP server?
Bezlo MCP is listed in the public MCP registry as io.github.gba3124/bezlo-mcp. Bezlo MCP: device-preset mobile screenshots, layout diagnostics, see-and-act sessions. This page covers its npm package (bezlo-mcp).
Is the Bezlo MCP server safe to use?
Bezlo MCP scores 69 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Bezlo MCP server expose?
Bezlo MCP exposes 13 tools: list_sessions, list_devices, capture_page, capture_matrix, session_assert, and 8 more. Their descriptions and schemas cost roughly 1,165 tokens of context every time the server is loaded.
Is the Bezlo MCP server still maintained?
Bezlo MCP is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Bezlo MCP server under?
Bezlo MCP declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.