oassis — web scraping, crawling and browser control for AI agents

by oassis.dev · remote · no sign-in to list tools · v1.0.1 · published by dev.oassis

Scrape to markdown, map and crawl sites, drive a real browser. Pay per call, no API key, no signup.

Deletes · 1Changes · 11

Compare Registry entry

14 tools: 1 can delete or cancel things, 11 change things and 2 only read.

Scanned Oct 21, 2026

Deletes or cancels1Claude Code: deny: see these tools
Can't be undone0Claude Code: ask
Changes things11Claude Code: ask: see these tools
Only reads2Claude Code: allow: see these tools

3 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http scraper-crawler https://api.oassis.dev/mcp

Findings

Matches of fixed checks, with the text they matched.

3 warn

Warnweb_batch_status
The server marks "web_batch_status" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_batch_status" says "status": a word for reading.
What this check looks for
Warnweb_crawl_status
The server marks "web_crawl_status" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_crawl_status" says "status": a word for reading.
What this check looks for
Warnweb_task_cancel
The server marks "web_task_cancel" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_task_cancel" says "cancel": a word for removing or ending something.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

14 tools

Deletes or cancels 1Removes, cancels or revokes something.Claude Code: deny

web_task_cancelStops a task using its owning API key, or its legacy access_token.1 finding
Why it is in this group
- The name "web_task_cancel" says "cancel": a word for removing or ending something.
- The server marks it not destructive (destructiveHint: false), but an annotation never lowers a class.
Findings
- Warn
  The server marks "web_task_cancel" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_task_cancel" says "cancel": a word for removing or ending something.
  What this check looks for
Description, as the server wrote it
Stops a task using its owning API key, or its legacy access_token. No new operations start. Cancellation is free; unused account credit reservations are released. Cancelling a finished task changes nothing.
Annotations the server declares
- title: Cancel a research task
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Changes things 11Creates or changes something that can be changed back.Claude Code: ask

web_actRuns actions against an open session and returns the resulting state.No findings
Why it is in this group
- The description's first verb is "run": a word for a change.
Description, as the server wrote it
Runs actions against an open session and returns the resulting state. Actions: {navigate}, {click:{ref}}, {type:{ref,text,clear}}, {select:{ref,value}}, {press}, {scroll}, {wait}, {back}. The `ref` is the one `controls` gave you. It stops at the first failure and tells you where. $0.0005 (0.25 credit) per action, plus requested outputs and any outstanding browser time. API key and credits required. Reference for the oassis API: https://oassis.dev/openapi.json
Annotations the server declares
- title: Act on an open page
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_batch_statusChecks a batch of scrapes: status, how many are done, and the results.1 finding
Why it is in this group
- The name "web_batch_status" says "status": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
Findings
- Warn
  The server marks "web_batch_status" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_batch_status" says "status": a word for reading.
  What this check looks for
Description, as the server wrote it
Checks a batch of scrapes: status, how many are done, and the results. Free for the owning account. Pass `cancel: true` to stop it.
Annotations the server declares
- title: Check or cancel a batch
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
web_crawlFollows a site's links and reads every page.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Follows a site's links and reads every page. Returns a jobId; poll it with web_crawl_status. API key and credits required; `limit` controls the maximum pages charged. Use web_map first if you only need the urls. Reference for the oassis API: https://oassis.dev/openapi.json
Annotations the server declares
- title: Crawl a site
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_crawl_statusChecks a crawl: status, pages read, discovered and still queued, and the pages themselves.1 finding
Why it is in this group
- The name "web_crawl_status" says "status": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
Findings
- Warn
  The server marks "web_crawl_status" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "web_crawl_status" says "status": a word for reading.
  What this check looks for
Description, as the server wrote it
Checks a crawl: status, pages read, discovered and still queued, and the pages themselves. Free for the owning account. Pass `cancel: true` to stop it.
Annotations the server declares
- title: Check or cancel a crawl
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
web_feedbackTell us an answer was good or bad.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Tell us an answer was good or bad. FREE. Use it when a result is wrong — empty markdown, a control map missing a button, data that does not match the page — with the url or the jobId so it can be reproduced. It is the only way we learn that we read a page badly: our logs cannot tell that apart from a page that is simply like that. Reference for the oassis API: https://oassis.dev/openapi.json
Annotations the server declares
- title: Report a bad answer
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
web_mapEvery url of a site, fast and cheap: its sitemap plus, optionally, the links on the page.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Every url of a site, fast and cheap: its sitemap plus, optionally, the links on the page. Use it BEFORE crawling, to see what is there and decide what is worth reading. 1 credit ($0.002) with `includePage: false` (no browser at all), 1.5 credits ($0.003) with the page. Reference for the oassis API: https://oassis.dev/openapi.json
Annotations the server declares
- title: List a site's urls
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
web_scrapeProcesses a page and returns every output you ask for at once: markdown, html, links, screenshot, PDF, accessibility tree, elements by selector, AI-structured data, and `controls` …No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Processes a page and returns every output you ask for at once: markdown, html, links, screenshot, PDF, accessibility tree, elements by selector, AI-structured data, and `controls` (what can be clicked). One call, and a partial failure does not void the rest. From 1 credit ($0.002) per output. A url pointing at a PDF, Word, Excel or CSV file is converted to markdown instead, with no browser, for $0.002. Reference for the oassis API: https://oassis.dev/openapi.json
Annotations the server declares
- title: Read a page or a document
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_scrape_batchA batch OF SCRAPES: reads a list of urls YOU give it (2 to 50, from any sites) and returns a jobId.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
A batch OF SCRAPES: reads a list of urls YOU give it (2 to 50, from any sites) and returns a jobId. It discovers nothing on its own — for that use web_crawl. API key and credits required. Poll it with web_batch_status.
Annotations the server declares
- title: Read a list of urls
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_session_closeCloses the browser session and stops its time.No findings
Why it is in this group
- The name "web_session_close" says "close": a word for a change.
Description, as the server wrote it
Closes the browser session and stops its time. HTTP equivalent: POST /web/v1/session/{id}/close. No additional close fee; outstanding browser time is settled when applicable. If you do not close it, it closes itself after a minute without use.
Annotations the server declares
- title: Close a session
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
web_session_openOpens a browser session and returns the map of controls.No findings
Why it is in this group
- The name "web_session_open" says "open": a word for a change.
Description, as the server wrote it
Opens a browser session and returns the map of controls. Opening costs 2.5 credits plus the requested outputs; the first minute is included. Further started minutes cost 2 credits with an account key. Use web_act to interact and web_session_close when done. API key and credits required. Reference: https://oassis.dev/openapi.json
Annotations the server declares
- title: Open a browser session
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_task_startStarts a research task: a question answered by reading public pages, with sources, progress and cost.No findings
Why it is in this group
- The name "web_task_start" says "start": a word for a change.
Description, as the server wrote it
Starts a research task: a question answered by reading public pages, with sources, progress and cost. Requires an API key and credits. The maximum budget is reserved, actual execution cost is charged, and unused credits are released. Returns a task id: check it with web_task_status.
Annotations the server declares
- title: Start a research task
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true

Only reads 2Looks things up and changes nothing.Claude Code: allow

web_search_exaSearch the web with Exa's index: a query instead of a url, for when you do not know where to look.No findings
Why it is in this group
- The name "web_search_exa" says "search": a word for reading.
Description, as the server wrote it
Search the web with Exa's index: a query instead of a url, for when you do not know where to look. Returns title, url and a snippet per result. To read the pages, pass the urls to web_scrape_batch. The engine is named because the price is Exa's, passed through with no markup and read from its own payment challenge on every call — the quote is read at execution time and is not a guaranteed fixed price. API key and credits required over MCP.
Annotations the server declares
- title: Search the web
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
web_task_statusReturns a task's status, progress, sources, limitations, result and billing.No findings
Why it is in this group
- The name "web_task_status" says "status": a word for reading.
Description, as the server wrote it
Returns a task's status, progress, sources, limitations, result and billing. Only your own tasks.
Annotations the server declares
- title: Check a research task
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http scraper-crawler https://api.oassis.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__scraper-crawler__web_search_exa",
      "mcp__scraper-crawler__web_task_status"
    ],
    "ask": [
      "mcp__scraper-crawler__web_scrape",
      "mcp__scraper-crawler__web_session_open",
      "mcp__scraper-crawler__web_act",
      "mcp__scraper-crawler__web_scrape_batch",
      "mcp__scraper-crawler__web_batch_status",
      "mcp__scraper-crawler__web_map",
      "mcp__scraper-crawler__web_crawl",
      "mcp__scraper-crawler__web_crawl_status",
      "mcp__scraper-crawler__web_feedback",
      "mcp__scraper-crawler__web_task_start",
      "mcp__scraper-crawler__web_session_close"
    ],
    "deny": [
      "mcp__scraper-crawler__web_task_cancel"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as scraper-crawler. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/dev.oassis/scraper-crawler/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

12 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 18:11 UTC.

For agents: Markdown · JSON · report this listing