BROWSER USE - Browser Use Agents: give Browser Use a task and receive completed work. API V4 is current for new integrations. - Browser Infrastructure: connect your agent or automation to managed browsers through SDK, REST, or CDP. Starts at $0.02/browser-hour. - Developer tools: Open Source, Browser Harness, SDK, and MCP support the two products above. [Developer Index](https://browser-use.com/index.md) [Product Map](https://browser-use.com/llms.txt) [Full Product Context](https://browser-use.com/llms-full.txt) [Pricing](https://browser-use.com/pricing.md) [Cloud Docs](https://docs.browser-use.com/cloud/quickstart) [Open Source Docs](https://docs.browser-use.com/open-source/introduction) --- # Interactive Star Lab: 29 WebMCP tools for AI agents ![](https://www.google.com/s2/favicons?domain=interactive-star-lab.vercel.app&sz=96) Education & health · interactive-star-lab.vercel.app ## Interactive Star Lab Stargazing planner. Agents can predict visible stars, rank observing nights, create observation plans and compare results. [Open interactive-star-lab.vercel.app](https://interactive-star-lab.vercel.app/) ## Ask an agent to - Rank the best stargazing nights next week at my selected site - List stars brighter than magnitude 3 visible tonight - Create an observation plan for Vega, Altair and Deneb ## 29 tools - `capture_sky_snapshot`untrusted content Captures the currently rendered Sky canvas as a PNG, stores it in the app's snapshot storage, and returns its metadata. An optional missionId links the image to an existing Mission. The tool does not return a large… missionId: string?, download: boolean? - `commit_proposal`untrusted content Materializes the pending proposal's accepted items into a real Mission via the normal creation path (immutable from then on). Pass acceptedStarIds to commit a subset, or omit to commit the items currently marked… acceptedStarIds: array? - `compare_dark_sky_sites`read-onlyuntrusted content Fetches Open-Meteo cloud cover and visibility for the current site plus reference dark-sky sites (or a caller-provided list of 2-8 sites), scores each for stargazing, and reports the clearest one. Sites that fail are… sites: array? - `compare_prediction_and_observation`read-onlyuntrusted content Compares the fixed Mission prediction with human observation results. Unsure observations are excluded from the match-rate denominator. missionId: string - `configure_sky_view`untrusted content Configures a location and local wall-clock time, then opens Sky in one operation. Use either a built-in preset id (for example new-york) or a custom site with latitude, longitude, and timeZone. localDateTime has no… preset: string?, site: object?, localDateTime: string, azimuth: number?, altitude: number?, fieldOfView: number? - `create_observation_plan`untrusted content Creates an observation Mission for up to five selected star IDs using the current observation site, then opens Plan for human review before Sky or Observe. To archive the actual rendered Sky canvas, open Sky with the… dateTime: string, maxMagnitude: integer, starIds: array - `describe_current_view`read-onlyuntrusted content Describes what the human is currently looking at: site, date/time, camera direction and field of view, sky projection mode, display layers, scene counts and objects in frame, the current selection, and a log of the… - `generate_observation_guide`untrusted content Prepares a print-ready Observation Guide using the Mission creation-time site, date, and fixed star predictions. It includes a deterministic Mission Sky Snapshot as inline SVG and generates a PDF directly in the… missionId: string, title: string?, durationMinutes: integer?, timeZone: string? - `get_current_sky_state`read-onlyuntrusted content Returns the current sky viewer conditions and a structured list of stars in the current view. - `get_night_ephemeris`read-onlyuntrusted content Returns the darkness ephemeris for one observing night at the selected site: sunset/sunrise, the three twilight boundaries, the astronomical darkness window, Moon illumination and moon-free intervals. A night runs… nightOf: string? - `get_observation_mission`read-onlyuntrusted content Returns one Mission by ID, including its creation-time site, date, fixed target predictions, and cloud Snapshot status. missionId: string - `get_observation_results`read-onlyuntrusted content Returns a completed observation record with star names, prediction snapshots, and human observation statuses. Without a missionId, returns the selected record or the newest completed record. missionId: string? - `get_observation_site`read-onlyuntrusted content Returns the observation site currently selected in InteractiveStarLab, including its latitude and longitude. - `get_sky_conditions`read-onlyuntrusted content Fetches live cloud cover (total and per layer) and visibility for the current observation site from Open-Meteo, plus a 0-100 stargazing score. Advisory only: weather is not part of the geometric visibility prediction… - `get_sky_snapshot_metadata`read-onlyuntrusted content Returns one saved Sky snapshot's observation conditions and storage metadata without returning the PNG blob. snapshotId: string - `list_sky_snapshots`read-onlyuntrusted content Lists saved Sky snapshot metadata in newest-first order. PNG blobs are not included. limit: integer? - `open_observation_results`untrusted content Selects a saved observation result and opens the human-facing Results screen. Without a missionId, uses the selected record or newest completed record. This tool does not recompute or modify results. missionId: string? - `open_observe_view`untrusted content Opens the human-facing Observe screen so the user can record observations for the active Mission. - `open_plan_view`untrusted content Opens the human-facing Plan screen without creating or changing a Mission. - `open_sky_view`untrusted content Opens the human-facing Sky screen without changing sky conditions. Use get\_current\_sky\_state to read structured star positions; this tool does not return a screenshot. - `plan_stale`read-onlyuntrusted content Reports whether the pending proposal's assumptions still hold: it compares the site and observation dateTime the proposal was computed against with the current ones. A stale proposal's per-star predictions may no… - `predict_visible_stars`read-onlyuntrusted content Finds stars above the astronomical horizon for the selected observation site, date, and maximum magnitude. This geometric prediction does not include weather, horizon obstacles, or light-pollution APIs. dateTime: string?, maxMagnitude: integer, limit: integer? - `propose_plan`untrusted content Stages a ghost plan proposal for human review without creating a Mission. The proposal lists one item per star; the human accepts or rejects items on the Plan screen, and commit\_proposal materializes the accepted… dateTime: string, maxMagnitude: integer, starIds: array - `rank_nights`read-onlyuntrusted content Scores every observing night in a date range at the selected site and returns them best first. The score is 10 points per usable dark hour (astronomical darkness with the Moon down or faint), capped at 100. Use it to… from: string, to: string, limit: integer? - `restore_observation_mission`untrusted content Restores one observation Mission using its mission-specific recovery code. The code is a capability for that Mission, is never returned by this tool, and must not be exposed in conversation or logs. Opens the Observe… recoveryCode: string - `save_observation_results`untrusted content Saves only observation statuses explicitly reported by the user for every target in a Mission. It does not invent or infer observations, and it preserves the Mission creation-time prediction snapshot. Overwriting a… missionId: string?, results: array?, confirm: boolean?, undoToken: string? - `set_observation_site`untrusted content Sets the observation site and synchronizes its latitude and longitude with the Sky viewer. Existing Missions keep their creation-time site snapshots. name: string?, latitude: number, longitude: number, timeZone: string? - `set_sky_display_settings`untrusted content Changes Sky display layers, labels, and local simulation settings. firstMagnitude through faintMagnitude are display layers only; they are not Mission maxMagnitude and never change Mission targets or prediction… stars: boolean?, starNames: boolean?, constellationLines: boolean?, constellationNames: boolean?, milkyWay: boolean?, denseStars: boolean?, deepSky: boolean?, nightMode: boolean?, … (list cut; the site may define more) - `set_sky_view_settings`untrusted content Changes Sky viewer date/time, direction, elevation, and field of view. Use set\_observation\_site for latitude and longitude. Existing Mission predictions are not recalculated. dateTime: string?, azimuth: number?, altitude: number?, fieldOfView: number?, skyMode: string? Tools 29 Registered with JavaScript Scan finished Oct 19, 2026 Tool names and descriptions are what interactive-star-lab.vercel.app/ registered when we loaded it in Chrome 154 on Browser Use Cloud. The summary and the “ask an agent” lines are AI-written from them. To call the tools yourself, see [Chrome’s WebMCP docs](https://developer.chrome.com/docs/ai/webmcp). 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