io.github.perzianhq/mantis
NPM · MANTIS-BROWSER
The web as short, numbered text for AI agents: a lean browser interface over Playwright.
Available components
Last scanned (7 hours ago)
Scores higher than 74% of npm servers
Category Browser Automation
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 Security98
- 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
- 36 of 107 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to perzianhq/mantis). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 1 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability61
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 1045 tokens (~52/item across 20 items; 20 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management30
- Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage76
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 27% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 20 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 20 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.
- 25 Oct 26 +1
- Security disclosure: fail → pass ▲ functional
- 24 Oct 26 +16
- Malware scan: unverified → pass ▲ security
- 23 Oct 26 −5
- Malware scan: pass → unverified ▼ security
- Provenance: fail → pass ▲ security
- The attested source repository moved: perzianhq/mantis security
- Schema quality: 45 → 52 ▼ functional
- Tool coverage: 38% → 27% ▼ functional
- Package version: 0.1.2 → 0.1.4 functional
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Oct 26 0
- Security disclosure: unverified → fail ▼ functional
- 16 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 25 Oct 2026 · Analysed npm/mantis-browser@0.1.4
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | perzianhq/mantis |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/perzianhq/mantis/.github/workflows/publish-npm.yml@refs/tags/v0.1.4 |
| Rekor log index | 3423392368 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:58a5de97e48e4c732a71c13af314744cbac03bc172f23b0a8fa8e50fd08ec78d000a0a48fa0ff747704c4cf3da9667e9d806b37416a347cbb3fb86333 |
Background: How many MCP packages publish verified provenance →
Dependencies 107 packages
| Packages resolved | 107 |
|---|---|
| Stale | 36 |
| 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 →
ask_human ~93
Human handoff for CAPTCHA, 2FA, payment or login; never solves CAPTCHAs. Waits for a page change, then returns the page.
| Name | Type | Req | Description |
|---|---|---|---|
| reason | string | yes | What the human must do |
| timeout_seconds | number | – | Default 300 |
| until | string | – | url_change | selector_gone:<css> | selector_present:<css>; default: URL or content change |
No output schema declared.
No examples provided.
back ~13
Back one page in history.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
click ~19
Click element #id.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | – |
No output schema declared.
No examples provided.
data ~58
Prefer; text only. Extract image/SVG/chart alt, caption, text or Chart.js/ECharts/Highcharts values. id from read()/media(), or CSS selector.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | – | – |
| selector | string | – | CSS selector |
No output schema declared.
No examples provided.
fill ~63
Prefer one mixed call for related text, dropdown, and checkbox fields; unrelated fields stay unchanged. Verify entity identity before editing. On failure or rerender it stops and reports partial completion; after confirmed completion, report it rather than re-inspecting.
| Name | Type | Req | Description |
|---|---|---|---|
| fields | array | yes | – |
No output schema declared.
No examples provided.
find ~66
Case-insensitive whole-page text search, including trimmed content; returns #numbers, actionable row neighbours, and bounded local context. Use context_chars to expand just that local context; a matched heading is not a region label.
| Name | Type | Req | Description |
|---|---|---|---|
| context_chars | integer | – | – |
| text | string | yes | – |
No output schema declared.
No examples provided.
forget ~16
Clear region memory; next read shows everything.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
hover ~22
Hover element #id and show changes.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | – |
No output schema declared.
No examples provided.
look ~53
LAST RESORT; only image-returning tool (PNG, max 800px). Only after read/data/ocr failed. id or CSS selector.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | – | – |
| selector | string | – | CSS selector |
No output schema declared.
No examples provided.
media ~43
Only if read is insufficient: media → data (prefer) → ocr → look (last resort) → ask_human. Numbered images/canvases/charts.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
ocr ~43
Text-only OCR for image/canvas. Use if data found nothing. id or CSS selector.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | – | – |
| selector | string | – | CSS selector |
No output schema declared.
No examples provided.
open ~26
Open URL as numbered page text; act by #number.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | – |
No output schema declared.
No examples provided.
press ~49
Press a key, e.g. Enter. For bottom-loaded feeds, try End (Control+End if no movement) to load more; repeat only while new items appear.
| Name | Type | Req | Description |
|---|---|---|---|
| key | string | yes | – |
No output schema declared.
No examples provided.
read ~190
Numbered text; act by #number. ~"x" names are guesses. "Same as before" retains #numbers; region/full/fresh expands it; full is paged with offset. Verify the entity identity before editing. Before finishing, re-read and visibly verify every task constraint (filters, sort, size, quantity, date range). After an action confirms completion, stop and report it rather than re-inspecting. If #number is stale, read() and retry; if on the wrong page, back() and keep searching.
| Name | Type | Req | Description |
|---|---|---|---|
| fresh | boolean | – | Expand seen regions too (this call only) |
| full | boolean | – | Untrimmed bounded excerpt; use offset for the next excerpt |
| offset | integer | – | Character offset for the next full excerpt |
| region | string | – | Label substring, e.g. "nav"; if none matches, text inside a region also works |
No output schema declared.
No examples provided.
scroll ~72
Scroll up/down/left/right (default down). id alone brings #id into view; id + direction scrolls its containing list/panel/table. For wide tables use right; without id, a scrollable container is used when the page cannot scroll.
| Name | Type | Req | Description |
|---|---|---|---|
| direction | string | – | – |
| id | integer | – | – |
No output schema declared.
No examples provided.
select ~32
Choose option text in select or combobox #id.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | – |
| option | string | yes | – |
No output schema declared.
No examples provided.
tabs ~32
List tabs, or switch/close tab #id.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | – | – |
| id | integer | – | – |
No output schema declared.
No examples provided.
type ~38
Replace input #id text; submit presses Enter.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | – |
| submit | boolean | – | – |
| text | string | yes | – |
No output schema declared.
No examples provided.
upload ~45
Set local file path(s) on #id.
| Name | Type | Req | Description |
|---|---|---|---|
| files | array | – | – |
| id | integer | yes | – |
| path | string | – | – |
| paths | array | – | – |
No output schema declared.
No examples provided.
wait_for ~72
Wait up to 10s: text states are present (or appears) / disappears; #id states are present / enabled. On timeout, inspect the returned current observation.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | – | – |
| state | string | – | – |
| text | string | – | – |
| timeout_seconds | number | – | – |
No output schema declared.
No examples provided.
How do I install the io.github.perzianhq/mantis MCP server?
io.github.perzianhq/mantis runs locally as an npm package, launched with npx -y mantis-browser. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · mantis-browser
claude mcp add perzianhq-mantis -- npx -y mantis-browser
What is the io.github.perzianhq/mantis MCP server?
io.github.perzianhq/mantis is an MCP server listed in the public MCP registry as io.github.perzianhq/mantis. The web as short, numbered text for AI agents: a lean browser interface over Playwright. This page covers its npm package (mantis-browser).
Is the io.github.perzianhq/mantis MCP server safe to use?
io.github.perzianhq/mantis scores 81 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 25 October 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 io.github.perzianhq/mantis MCP server expose?
io.github.perzianhq/mantis exposes 20 tools: open, read, find, forget, click, and 15 more. Their descriptions and schemas cost roughly 1,045 tokens of context every time the server is loaded.
Is the io.github.perzianhq/mantis MCP server still maintained?
io.github.perzianhq/mantis is still listed as active in the MCP registry. We last reached this channel on 25 October 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 io.github.perzianhq/mantis MCP server under?
io.github.perzianhq/mantis declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.