Crawlio MCP Server

Crawlio MCP exposes 37 tools (full mode) or 6 tools (code mode) over stdio transport. The server connects to Crawlio.app's ControlServer for live operations and reads local state files for offline access.

Modes

Code Mode (default)

6 tools: search_api, execute_api, trigger_capture, extract_text_from_image, analyze_page, compare_pages. Use search_api to discover endpoints, then execute_api to call them. extract_text_from_image runs Vision OCR locally (no app required). Lower tool count, better for context-constrained clients.

Full Mode (--full)

35 individual tools with typed parameters and annotations. Better for clients that can handle many tools.

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Full Mode Tools (37)

Status & Monitoring (6)

get_crawl_status — Engine state + progress counters.

• since (int, opt): Sequence number for change detection.

get_crawl_logs — Recent log entries with filtering.

• category (string, opt): engine | download | parser | localizer | network | ui
• level (string, opt): debug | info | default | error | fault
• limit (int, opt): Max entries (default 100).

get_errors — Error/fault-level logs only. No params.

get_downloads — All download items with status, HTTP code, bytes, timing. No params.

get_failed_urls — Failed items with URL + error. No params.

get_site_tree — File paths as directory tree. No params.

Control (4)

start_crawl — Start a new crawl.

• url (string, opt): Single URL.
• urls (string[], opt): Multi-seed URLs.
• destinationPath (string, opt): Save directory.

stop_crawl — Stop crawl, cancel downloads, clear queue. No params.

pause_crawl — Pause (in-progress downloads complete). No params.

resume_crawl — Resume paused crawl. No params.

Settings & Configuration (3)

get_settings — Current pending settings + policy. No params.

update_settings — Partial merge (idle only).

• settings (object, opt): maxConcurrent, crawlDelay, timeout, downloadImages, downloadVideo, downloadFonts, downloadScripts, downloadStyles, userAgent, maxRetries, stripTrackingParams, customCookies, customHeaders, preferHTTP2 (bool), proxyConfiguration ({type: "http"/"https"/"socks5", host, port, username?, password?, noProxyHosts?}).
• policy (object, opt): scopeMode, maxDepth, maxPagesPerCrawl, respectRobotsTxt, excludePatterns, includePatterns, includeSupportingFiles, downloadCrossDomainAssets, autoUpgradeHTTP, pinnedPublicKeys ({hostname: [sha256HexStrings]}).

recrawl_urls — Re-crawl specific URLs.

• urls (string[], required).

Projects (5)

list_projects — All saved projects. No params.

save_project — Save current project.

• name (string, opt).

load_project — Load project by ID.

• id (string, required).

delete_project — Delete project by ID.

• id (string, required).

get_project — Full project details.

• id (string, required).

Export & Extraction (5)

export_site — Export downloaded site.

• format (string, required): folder | zip | singleHTML | warc
• destinationPath (string, required).
• warcConfiguration (object, opt): compressionEnabled (bool, default true), maxFileSize (int, default 1GB, 0=no split), cdxEnabled (bool, default true), dedupEnabled (bool, default true).

get_export_status — Export state + progress. No params.

extract_site — Run RSC extraction pipeline.

• destinationPath (string, opt).

get_extraction_status — Extraction state + progress. No params.

trigger_capture — WebKit runtime capture (framework detection, network, console, DOM).

• url (string, required).

OCR (1)

extract_text_from_image — Extract text from a local image using Vision OCR. No Crawlio.app required.

• path (string, required): Absolute file path to image.
• languages (string[], opt): Recognition languages (e.g. ["en-US"]).
• recognitionLevel (string, opt): accurate (default) or fast.

Enrichment (6)

get_enrichment — Browser enrichment data.

• url (string, opt): Filter by URL.

submit_enrichment_bundle — Complete enrichment bundle.

• url (string, required).
• framework (object, opt), networkRequests (array, opt), consoleLogs (array, opt), domSnapshotJSON (string, opt).

submit_enrichment_framework — Framework detection.

• url (string, required), framework (object, required).

submit_enrichment_network — Network requests.

• url (string, required), networkRequests (array, required).

submit_enrichment_console — Console logs.

• url (string, required), consoleLogs (array, required).

submit_enrichment_dom — DOM snapshot.

• url (string, required), domSnapshotJSON (string, required).

Observations & Findings (5)

get_observations — Append-only observation timeline.

• host (string, opt), op (string, opt), source (string, opt), since (number, opt), limit (int, opt).

get_observation — Look up a single observation or finding by ID.

• id (string, required): Observation ID (obs_xxx or fnd_xxx). Use to verify evidence chains.

create_finding — Create curated finding with evidence.

• title (string, required), url (string, opt), evidence (string[], opt), synthesis (string, opt), confidence (string, opt: high/medium/low/none), category (string, opt).

get_findings — List curated findings.

• host (string, opt), limit (int, opt).

get_crawled_urls — Downloaded URLs with pagination.

• status (string, opt), type (string, opt), limit (int, opt), offset (int, opt).

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Code Mode Tools (6)

search_api — Search available endpoints by keyword.

search_api(query: "enrichment", limit: 10)

execute_api — Execute HTTP request against ControlServer.

execute_api(method: "GET", path: "/status")
execute_api(method: "POST", path: "/start", body: {"url": "https://example.com"})
execute_api(method: "PATCH", path: "/settings", body: {"policy": {"maxDepth": 2}})
execute_api(method: "GET", path: "/crawled-urls?status=completed&limit=50")

trigger_capture — WebKit runtime capture (same as full mode).

trigger_capture(url: "https://example.com")

extract_text_from_image — Vision OCR on local image (same as full mode).

extract_text_from_image(path: "/path/to/image.png")
extract_text_from_image(path: "/path/to/image.jpg", languages: ["en-US"], recognitionLevel: "fast")

analyze_page — Composite analysis of a single page (capture + enrich + crawl status). Returns evidenceId, evidenceQuality, gaps.

analyze_page(url: "https://example.com")

compare_pages — Compare two pages side-by-side (runs analyze_page on each). Returns comparisonReadiness, symmetric, degradationNotes, timingDelta.

compare_pages(urlA: "https://example.com", urlB: "https://competitor.com")

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HTTP-Only Endpoints (3)

Accessible via execute_api but not as MCP tools:

• GET /health — Server health, version, uptime, PID.
• GET /debug/metrics — Engine metrics: connections, queue depth, memory.
• POST /debug/dump-state — Full engine state dump.

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Resources (4)

URI	Description
crawlio://status	Engine state and progress
crawlio://settings	Current crawl settings
crawlio://site-tree	Downloaded file tree
crawlio://enrichment	All browser enrichment data

Template (1)

crawlio://enrichment/{url} — Per-URL enrichment data.

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Prompts (4)

Prompt	Arguments	Description
crawl-and-analyze	url (req), maxDepth (opt)	Crawl + analyze results
export-site	url (req), format (req), destination (opt)	Crawl + export
compare-sites	url1 (req), url2 (req)	Compare two sites
fix-failed-urls	none	Diagnose + retry failures

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Common Workflows

Crawl → Wait → Export

1. update_settings — Configure depth, scope, asset options.
2. start_crawl — Begin crawl.
3. get_crawl_status — Poll until engineState is completed. Use since param for efficient polling.
4. export_site — Export as zip/folder/singleHTML/warc.
5. get_export_status — Confirm export finished.

WARC Export with Options

1. update_settings — Configure proxy/pinning if needed: {settings: {proxyConfiguration: {type: "http", host: "proxy.corp", port: 8080}}}.
2. start_crawl — Crawl the target site.
3. get_crawl_status — Poll until completed.
4. export_site — Export with WARC options: {format: "warc", destinationPath: "/tmp/archive.warc.gz", warcConfiguration: {compressionEnabled: true, cdxEnabled: true, dedupEnabled: true, maxFileSize: 0}}.
5. Validate: CDX sidecar created, revisit records for dedup, GZIP compression.

Enrichment Pipeline

1. trigger_capture(url) — Run WebKit capture.
2. get_enrichment(url) — Read framework detection, network, console, DOM.
3. create_finding — Record insights with evidence.

Error Recovery

1. get_failed_urls — List failures.
2. recrawl_urls — Retry failed URLs.
3. get_crawl_status — Poll until re-crawl completes.
4. get_failed_urls — Check remaining failures.

Status Polling Pattern

1. status = get_crawl_status()
2. seq = status.seq
3. Loop:
   status = get_crawl_status(since: seq)
   if status != "no changes": update seq, check engineState
   sleep 5s