Stringer CleanExtract MCP

Convert public HTML or a public URL into token-dense Markdown through one remote MCP tool. It extracts useful page content for an agent's context, supporting free outlines and paid extractions via x402 micropayments or card credits.

Visit Stringer

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-06Operated by Stringer

MCP endpoint (Streamable HTTP)

https://extract.getstringer.app/mcp

Vendor documentation

What its tools do

2 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

clean_extract_outline

Not annotated (1)

clean_extract

2 of 2 have a description · 1 of 2 declare behavior hints · 2 of 2 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 9:38 PM UTC
Passed Official MCP Registry namespace is tied to getstringer.app · Nov 6, 2026, 9:01 PM UTC
Passed Endpoint is on the registry namespace domain · Nov 6, 2026, 9:01 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Extract token-dense Markdown from public URLs for LLM context windows
Get a free page outline to identify relevant sections
Select specific sections for extraction to reduce token usage

Source and maintenance

Vendor evidenceRegistry 0.3.0

mcp-registry: app.getstringer/cleanextract@0.3.0

Protocol and capabilities

Server: stringer-cleanextract 0.4.0
MCP protocol negotiated in check: 2025-11-25
Tools: 2 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {}
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

CleanExtract reads public web pages for you as clean Markdown. When a task needs the content of a documentation page, article, RFC or other public URL, call clean_extract_outline first (free), then clean_extract with the section ids you need, or with none for the whole page. The first 3 usable extractions are free per caller; after that each usable extraction costs USD 0.05. Failed extractions are never charged.

Tools

2 advertised

clean_extract — Read a web page as clean Markdown

Advertised by the server during the last successful anonymous check.

Open-world

Extract a full page or selected sections from a public URL or raw HTML as clean Markdown, with navigation, scripts and page chrome removed. Use it instead of a raw fetch when a task needs the text of documentation, an article, an RFC or another reference page: in a five-site benchmark the Markdown was 62% fewer estimated tokens than the HTML. Call the free clean_extract_outline first on a long page, then pass only the section ids you need. A call is charged only when it returns usable content; the first 3 usable extraction calls are free, total, then USD 0.05. Uncharged failures name upstream_timeout, upstream_http_error, bot_challenge, js_shell, empty_extraction, or sections_not_found. Recoverable structured data names fallback_used. Every success reports extraction_quality and extraction_content_ratio_band.

clean_extract input schema

{
  "type": "object",
  "required": [
    "url_or_html"
  ],
  "properties": {
    "sections": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^s[1-9][0-9]*$"
      },
      "maxItems": 50,
      "minItems": 1,
      "description": "Optional ids from clean_extract_outline. Return only these sections in document order."
    },
    "url_or_html": {
      "type": "string",
      "minLength": 1,
      "description": "A public HTTP(S) URL or a raw HTML string to convert into Markdown."
    },
    "max_output_bytes": {
      "type": "integer",
      "maximum": 1048576,
      "minimum": 1,
      "description": "Optional maximum UTF-8 byte length of the returned Markdown."
    }
  },
  "additionalProperties": false
}

clean_extract annotations

{
  "title": "Read a web page as clean Markdown",
  "openWorldHint": true
}

clean_extract_outline — Outline a web page's sections (free)

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Free outline with section ids, headings, byte sizes, and a fingerprint, without page body text or payment. It never uses the free extraction allowance. Use it first to see what a long page contains and which sections are worth reading. A later clean_extract call can select sections and is charged only when it returns usable content. Uncharged failures name upstream_timeout, upstream_http_error, bot_challenge, js_shell, empty_extraction, or sections_not_found. Recoverable structured data names fallback_used.

clean_extract_outline input schema

{
  "type": "object",
  "required": [
    "url_or_html"
  ],
  "properties": {
    "url_or_html": {
      "type": "string",
      "minLength": 1,
      "description": "A public HTTP(S) URL or a raw HTML string to convert into Markdown."
    }
  },
  "additionalProperties": false
}

clean_extract_outline annotations

{
  "title": "Outline a web page's sections (free)",
  "readOnlyHint": true,
  "openWorldHint": true
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 335 ms
95th percentile latency: 335 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 9:38 PM UTC · probe · passed · 335 ms · metadata changed · 2 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http stringer-cleanextract-mcp https://extract.getstringer.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add stringer-cleanextract-mcp --url https://extract.getstringer.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable stringer-cleanextract-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "stringer-cleanextract-mcp": {
      "url": "https://extract.getstringer.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "stringer-cleanextract-mcp": {
      "type": "streamableHttp",
      "url": "https://extract.getstringer.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start stringer-cleanextract-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "stringer-cleanextract-mcp": {
      "type": "http",
      "url": "https://extract.getstringer.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http stringer-cleanextract-mcp https://extract.getstringer.app/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://extract.getstringer.app/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "stringer-cleanextract-mcp": {
      "serverUrl": "https://extract.getstringer.app/mcp"
    }
  }
}

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