Fetch a URL with Chrome-fingerprinted HTTP using the active profile. Parses HTML, seeds the JS DOM, returns BlockMap inline. With exec_scripts: true, extracts inline AND external tags from the parsed HTML, fetches externals in parallel (8s per-fetch timeout), eval's them in document order in QuickJS (with shims for setTimeout/fetch/etc.), then settles the event loop and fires DOMContentLoaded + load. <script async> is honored: async scripts execute after the sync queue. When --policy=blocklist is set, tracker URLs are blocked at script-fetch time (see scripts.policy_blocked in the result). Returns a scripts summary with inline_count, external_count, async_count, policy_blocked, executed, errors.

Auto-extract: when the page embeds JSON-bearing tags (density.json_scripts > 0 — covers application/json, application/ld+json, text/x-magento-init, text/x-shopify-app, etc.), navigate auto-runs extract() and returns the result as the extract field. Saves a round trip on the common case where the data the JS would have rendered is already sitting in the HTML — JSON-LD article schemas on news sites, NEXT_DATA page state on Next.js apps, json_in_script product blobs on Magento/Shopify, GitHub RSC payloads, etc. Capped at 256 KB inline; over that limit extract returns a stub with strategy/confidence/size_bytes/hint and the agent should call extract() explicitly to retrieve the full payload. Pages with no embedded JSON get extract:null and pay zero extra cost.

Tool advice: navigate also returns tool_likelihoods plus tool_recommendations, derived from concrete page signals (structure/headings, selector hints, density, embedded data, network captures, challenge state, and script pathology) so agents can pick the next tool without guessing.

Auto-solve: Reddit's JS proof-of-work challenge (provider: reddit_js_challenge) is transparently solved — the challenge is detected, the GET solution URL is computed (solution = hex_value + hex_value), and the real page is returned in one navigate call. challenge:null on the result means the real page was served. Subsequent navigations in the same session carry the clearance cookie and skip the challenge entirely.

Run a CSS selector against the current page's parsed DOM. Returns matching elements as [{ref, tag, attrs, text, text_chars, text_truncated}]. Element refs (e:NN) are stable handles for use with click/type/submit. Selector engine supports tag, id, class, attribute matchers (=, ^=, $=, *=, ~=), all four combinators (descendant, >, +, ~), pseudo-classes (:first/last/nth-child including An+B formulas, :first/last/nth-of-type, :only-child/of-type), :not(), and :has().

Diagnose why a CSS selector did or did not match. Returns matched_count, sample matches, DOM summary counts, selector hints (top tags/classes/data attrs/ids), and actionable hints for selector_miss, thin_shell, or embedded_json. Use this when query() returns [] and you need to distinguish a bad selector from an empty/browser-rendered DOM.

Get the textContent of the FIRST element matching the selector (default: body). Note: on Wikipedia/MDN/news sites, the first is often a hatnote or image caption, not the lead paragraph — prefer text_main for reading the page's primary content.

Get the textContent of the page's main content area, excluding chrome (header/nav/footer/aside). Tries , then [role=main], then a single , then falls back to the longest non-chrome subtree. Use this for reading article body / docs page / blog post content.

Return chrome-stripped, JSON-stripped, whitespace-collapsed text from a selector or the best content root. Drops script/style/noscript/svg and page chrome (nav/header/footer/aside) plus obvious hidden widgets and repeated boilerplate.

Find localized text matches and return [{ref, tag, attrs, before, match, after, text}]. Ranks article/main/content matches above nav/header/footer boilerplate.

Return cleaned surrounding text around an element ref or the best ranked text match. Returns {ref, before, match, after, text}.

Find elements by visible text content. Returns the smallest/deepest element whose textContent matches the needle, with chrome (header/nav/footer/aside) skipped. Anchor-promotion: a span/strong/etc. inside an resolves to the anchor (so click() targets the actionable element). Right tool when CSS selectors are unstable (React-rendered pages with hashed class names) but the visible label is reliable — e.g. find a 'Sign in' button without knowing its class.

Recompute the BlockMap for the current page. Use after eval'd JS or click/type modifies the DOM. Same shape as the inline blockmap from navigate.

Render the current page into semantic, task-discoverable JSON objects. Reconstructs page structure as search_form, nav_link, article_card, course_card, model_card, product_card, table, answer_block, and limitation objects with actions, normalized fields, goal-based scoring, and provenance. Prefer this as the first planning tool after navigate when raw links/text are too wide.

Find page-owned navigation/search routes for a goal. Returns ranked visible links, forms with controls/query_url previews, and inferred URLs derived from page-owned routes plus goal terms. Use before guessing URLs manually.

High-level cheap-first information discovery. Optionally navigates to a URL, runs light JS, merges DOM routes, inferred form/query URLs, and network JSON routes into one ranked graph with provenance plus route-level escalation hints. Use this when the task is to find where information lives before extracting it.

Parse captured JSON/API/network responses into semantic objects with fields, scores, matched query terms, and capture/path provenance. Use after navigate or activate when network_stores shows JSON/GraphQL/NDJSON captures and raw body_preview is too noisy.

Auto-strategy structured-data extraction. Tries JSON-LD (schema.org) → NEXT_DATA → Nuxt → JSON-in-script (Magento, Shopify, BigCommerce custom-typed scripts) → OpenGraph/meta → microdata → text_main fallback, returns the highest-confidence hit as {strategy, confidence, data, tried}. Use this as the one-shot 'give me the data, you figure out how' call when you don't want to plan the strategy yourself. Pass strategy='json_ld' (or any of the names above) to force a specific extractor.

Pull a into {headers, rows, row_count}. Headers come from ... if present, else the first 's cells. Each subsequent 's cells become a row dict keyed by header (or 'col_N' if no header for that column). Right tool for pricing tables, specs, finance/listings tables — saves writing the per-cell mapping eval.

Alias for extract_table with a first-table default. Pulls a table into {headers, rows, row_count}; selector defaults to 'table'. Use this when an agent expects a table-to-JSON convenience tool.

Pull a repeated card pattern into [{...}, {...}]. Right tool for HN-style lists, search results, product grids — collapses per-site eval boilerplate. Field spec shapes: 'css selector' (text content), 'css selector @attr' (attribute), or ['css selector', '@attr'] (tuple form). If a sub-selector returns null, the field value is null.

Auto-detect repeated article/card/product/course/listing blocks and return normalized items [{title, price, condition, url, availability, snippet, meta, image_alt, score}]. Prefer this over extract_list when the page has semantically ambiguous recipe, course, product, or model cards and you do not already know field selectors. Optional selector scopes detection to known card nodes; kind can bias scoring (recipe, course, product, listing).

Drain the JS event loop: alternately runs queued microtasks (Promise resolutions) and fires expired setTimeout/setInterval callbacks, sleeping to the next deadline when only timers remain. Returns when the queue is empty OR max_ms elapses OR max_iters iterations complete. Defaults: max_ms=2000, max_iters=50. Use after seeding the DOM (or after eval'd code that schedules timers) to let pending callbacks run.

Dispatch a click event on the element at ref (e.g. e:142, returned from query). If the element is and the click was not preventDefault'd, auto-follows the href via navigate (returns the full navigation result with new BlockMap). Otherwise returns {ok, ref, tag, follow: null}.

Higher-level action probe. Clicks an element by ref or visible action text, settles, and returns before/after URL, BlockMap/page_model summaries, network counts, hashes, and classification: navigated, dom_changed, network_changed, no_effect, or unsupported.

Set the value of an input/textarea (referenced by ref) and dispatch input + change events. Use before submit on form fields.

Submit a form by gathering input/textarea/select values and navigating to the resolved action URL. Supports GET and application/x-www-form-urlencoded POST. Checked checkbox/radio values are serialized; multipart upload forms are not supported.

Return the raw HTML body of the last navigation. Use as a fallback when the BlockMap or selectors aren't enough — but the response can be large (often 100KB+).

Run arbitrary JavaScript in the embedded QuickJS runtime against the current page's parsed DOM. Returns the JSON-stringified result. Power tool — prefer query/text/blockmap when the CSS selector engine can express what you need. Canonical param is code; raw JSON-RPC also accepts script or expression aliases and errors if no code-like param is present.

Add cookies to the session jar. Each item is an object {name, value, domain, path?, secure?, http_only?, url?} or a raw Set-Cookie string. Used to replay clearance cookies (e.g. PerimeterX _px3) lifted from a real Chrome session, bypassing bot detection without running the challenge JS.

Return all cookies currently in the jar as [{name, value, domain, path, secure, http_only}]. Use this to export cookies to disk for a later session.

Drop all cookies from the jar.

Bind a task outcome (success/failure/quality) to a previous navigation_id from a navigate() call. Used by the policy framework's outcome protocol — see docs/probabilistic-policy.md §4.5. v0 emits an outcome_reported NDJSON event for the navigation; no posterior updates yet. Drivers should call this once per agent task so future Bayesian phases (B/D-2) can attribute extraction success/failure to specific policy decisions.

Return content-bearing fetch/XHR responses captured during navigate, ranked by likely content value. SPAs often keep their data in API responses (JSON, GraphQL, NDJSON, Next/Nuxt route data) that are cleaner than the rendered DOM — this tool surfaces them directly. Each entry has capture_id, URL, status, content-type, body_preview (truncated to 256 KB), body_bytes (full size), body_truncated flag, navigation_id, and a heuristic score. Bodies for trackers/ads/CSS/HTML/media are NOT captured. The navigate result already contains a top-5 summary scoped to that navigation; use this tool to get more entries, filter by host, or pull captures from a different navigation.

Drop all captured network responses from the session's network store. Use this between unrelated navigations if you don't want earlier captures showing up in later network_stores calls.