{
  "data": {
    "a": {
      "slug": "browserbase",
      "name": "Browserbase",
      "vendor": "Browserbase",
      "vendorUrl": "https://www.browserbase.com",
      "kind": "http-api",
      "category": "browser",
      "summary": "Hosted headless browsers for agents over CDP, plus Fetch and Search APIs and the Stagehand framework.",
      "url": "https://www.anchorterminal.com/tools/browserbase",
      "markdownUrl": "https://www.anchorterminal.com/tools/browserbase.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/browserbase.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/browserbase.json",
      "repo": "https://github.com/browserbase/stagehand",
      "license": "MIT (Stagehand)",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.browserbase.com/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@browserbasehq/stagehand"
        }
      ],
      "auth": "api-key",
      "authNotes": "`X-BB-API-Key` header. Browsers connect over CDP at wss://connect.browserbase.com.",
      "pricing": "freemium",
      "pricingNotes": "Free with 1 browser-hour, 3 concurrent browsers, 1,000 Fetch and 1,000 Search calls and 7-day recording retention. Developer $20 a month with 100 hours then $0.12 an hour, 25 concurrent. Startup $99 with 500 hours then $0.10, 100 concurrent, 10,000 Fetch calls then $0.50 per 1,000. Fetch $1 per 1,000 on Developer, $4 with proxies, Search $7 per 1,000, proxies $10 to $12 a GB. Keyless x402 sessions at $0.12 an hour in USDC on Base (https://www.browserbase.com/pricing, https://docs.browserbase.com/integrations/x402/introduction.md).",
      "priceSummary": "$0.12 / browser-hr",
      "where": "hosted",
      "x402": {
        "level": "yes",
        "evidence": "x402 on https://x402.browserbase.com for browser sessions only, $0.12 an hour in USDC on Base, no account or API key, unused minutes refunded on terminate (https://docs.browserbase.com/integrations/x402/introduction.md, checked 2026-10-01). Fetch, Search and api.browserbase.com aren't covered. Also an MPP seller per Stripe's 18 March 2026 post.",
        "endpoints": [
          {
            "url": "https://x402.browserbase.com/browser/session/create",
            "priceUsd": null,
            "network": ""
          },
          {
            "url": "https://x402.browserbase.com/browser/session/:id/status",
            "priceUsd": null,
            "network": ""
          },
          {
            "url": "https://x402.browserbase.com/browser/session/:id/extend",
            "priceUsd": null,
            "network": ""
          },
          {
            "url": "https://x402.browserbase.com/browser/session/:id/terminate",
            "priceUsd": null,
            "network": ""
          }
        ]
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 25400,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-26"
      },
      "docsUrl": "https://docs.browserbase.com",
      "llmsTxt": "https://docs.browserbase.com/llms.txt",
      "openapi": "https://docs.browserbase.com/reference/api/openapi.v1.yaml",
      "capabilities": [
        "browser.hosted",
        "browser.control",
        "web.fetch",
        "web.search",
        "web.scrape"
      ],
      "tags": [
        "official",
        "hosted",
        "freemium",
        "no-card",
        "x402",
        "mpp",
        "openapi",
        "llms-txt",
        "mcp"
      ],
      "lastRelease": "2026-09-09",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 76.2,
        "grade": "BB",
        "agentReady": true,
        "rank": 39,
        "ranked": true,
        "rankOf": 1076,
        "categoryRank": 3,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 75,
          "maintenance": 92,
          "payments": 90,
          "reliability": 90,
          "schema": 80,
          "security": 43,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "x402 sessions at x402.browserbase.com with no account, $0.12 an hour, unused minutes refunded. The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL.",
        "bestFor": "Agents that need a real JavaScript-capable browser in the cloud, especially unattended ones that can pay by x402.",
        "strengths": [
          "x402 sessions at x402.browserbase.com with no account, $0.12 an hour, unused minutes refunded",
          "Per-plan concurrency and session-creation limits, with Retry-After and a documented backoff helper",
          "OpenAPI 3.0.0, llms.txt and a dated changelog with 12 entries since 13 July 2026",
          "SOC 2 Type II, HIPAA BAA, per-browser VMs and a valid PGP-signed security.txt",
          "Recording and logging can be switched off per session"
        ],
        "weaknesses": [
          "The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL",
          "No scopes or rotation guide for API keys, and no SLA published",
          "Hosted MCP tools have one-line descriptions and no annotations",
          "Privacy policy last updated 1 June 2024 says 30-day recordings, the pricing page says 7 days on Free",
          "The open-source MCP repository was archived on 20 July 2026 but the setup page still describes self-hosting it"
        ],
        "agentNotes": [
          "Use x402.browserbase.com when you have a wallet and no key. Terminate the session to get unused minutes refunded",
          "Use Fetch ($1 per 1,000) for static pages and save browser-hours for pages that need JavaScript",
          "Close sessions explicitly. Each session bills at least one minute, and idle ones keep billing",
          "Set `recordSession` and `logSession` to false when pages hold personal data",
          "On 429, wait `retry-after` seconds before creating another session"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 8,
        "avgRating": 3.4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 76.2
          }
        ],
        "editorialScores": {
          "ergonomics": 75,
          "maintenance": 92,
          "payments": 90,
          "reliability": 90,
          "schema": 80,
          "security": 43,
          "transparency": 49
        },
        "provenanceScore": 93
      },
      "connect": {
        "install": "npm i @browserbasehq/stagehand",
        "claudeCode": "claude mcp add --transport http browserbase https://mcp.browserbase.com/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/browser.hosted",
        "tool": "https://letme.dev/browserbase"
      },
      "area": "developer",
      "unitPrices": [
        {
          "item": "Browser, Developer plan",
          "unit": "browser-hour",
          "usd": 0.12
        },
        {
          "item": "Browser, Startup plan",
          "unit": "browser-hour",
          "usd": 0.1
        },
        {
          "item": "Browser by x402",
          "unit": "browser-hour",
          "usd": 0.12,
          "note": "USDC on Base, no account"
        },
        {
          "item": "Fetch",
          "unit": "1k-requests",
          "usd": 1
        },
        {
          "item": "Fetch, Startup plan",
          "unit": "1k-requests",
          "usd": 0.5
        },
        {
          "item": "Fetch with proxy",
          "unit": "1k-requests",
          "usd": 4
        },
        {
          "item": "Search",
          "unit": "1k-requests",
          "usd": 7
        },
        {
          "item": "Proxy traffic, Developer",
          "unit": "gb",
          "usd": 12
        },
        {
          "item": "Developer plan",
          "unit": "month",
          "usd": 20,
          "note": "100 browser-hours"
        },
        {
          "item": "Startup plan",
          "unit": "month",
          "usd": 99,
          "note": "500 browser-hours"
        }
      ],
      "provenance": {
        "legalEntity": "Browserbase, Inc.",
        "domain": "browserbase.com",
        "domainRegistered": "2002-08-13",
        "domainNote": "browserbase.com was registered in 2002, long before the company.",
        "endpointOnVendorDomain": true,
        "terms": "https://www.browserbase.com/terms-of-service",
        "privacy": "https://www.browserbase.com/privacy-policy",
        "statusPage": "https://status.browserbase.com",
        "changelog": "https://www.browserbase.com/changelog",
        "securityTxt": "valid",
        "checked": "2026-09-26",
        "score": 93
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/browserbase.json",
      "live": {
        "slug": "browserbase",
        "probe": {
          "target": "https://api.browserbase.com/v1",
          "method": "get",
          "lastAt": "2026-10-14T09:41:45.146350063Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 447,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 449,
          "p95ms24h": 518,
          "samples24h": 248,
          "samples30d": 4479,
          "days": [
            {
              "date": "2026-09-27",
              "probes": 132,
              "ok": 132
            },
            {
              "date": "2026-09-28",
              "probes": 285,
              "ok": 285
            },
            {
              "date": "2026-09-29",
              "probes": 286,
              "ok": 286
            },
            {
              "date": "2026-09-30",
              "probes": 286,
              "ok": 286
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 100,
              "ok": 100
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.browserbase.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-14T09:38:53.779316531Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "browserbase/stagehand",
            "version": "@browserbasehq/stagehand@3.7.3",
            "released": "2026-08-28",
            "seenAt": "2026-10-13T22:47:16.248984525Z"
          },
          {
            "registry": "npm",
            "name": "@browserbasehq/stagehand",
            "version": "4.2.1",
            "seenAt": "2026-10-13T22:47:16.005567209Z"
          }
        ],
        "githubStars": 25659,
        "npmWeekly": 1640981,
        "securityTxt": {
          "url": "https://browserbase.com/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-06-01T07:00:00.000Z",
          "checkedAt": "2026-10-13T15:45:04.233513558Z"
        },
        "llmsTxt": {
          "url": "https://docs.browserbase.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-13T14:11:01.572865744Z"
        },
        "domain": {
          "domain": "browserbase.com",
          "registered": "2002-08-13",
          "source": "https://rdap.verisign.com/com/v1/domain/browserbase.com",
          "checkedAt": "2026-10-11T13:22:29.59600278Z"
        },
        "pages": [
          {
            "url": "https://www.browserbase.com/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-13T20:26:37.64969745Z",
            "changedAt": "2026-10-01T13:16:50.010743856Z",
            "fingerprint": "cdaeb426a47b"
          },
          {
            "url": "https://www.browserbase.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-13T20:26:40.502992256Z",
            "changedAt": "2026-10-02T15:25:49.435902867Z",
            "fingerprint": "e861cca655df"
          },
          {
            "url": "https://www.browserbase.com/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-13T20:26:42.431102575Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ed395a888780"
          },
          {
            "url": "https://www.browserbase.com/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-13T20:26:44.191074253Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "cf3ed1b2bbee"
          }
        ],
        "updatedAt": "2026-10-14T09:41:45.146350063Z"
      }
    },
    "answer": "Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema \u0026 documentation.",
    "b": {
      "slug": "selenium",
      "name": "Selenium",
      "vendor": "Selenium project (Software Freedom Conservancy)",
      "vendorUrl": "https://www.selenium.dev",
      "kind": "sdk",
      "category": "browser",
      "summary": "Selenium is the open-source browser automation project behind the W3C WebDriver standard, with official bindings for Java, Python, C#, Ruby and JavaScript and a self-hosted Grid server that runs browsers on other machines.",
      "url": "https://www.anchorterminal.com/tools/selenium",
      "markdownUrl": "https://www.anchorterminal.com/tools/selenium.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/selenium.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/selenium.json",
      "repo": "https://github.com/SeleniumHQ/selenium",
      "license": "Apache-2.0",
      "transports": [
        "http"
      ],
      "packages": [
        {
          "registry": "pypi",
          "name": "selenium"
        },
        {
          "registry": "npm",
          "name": "selenium-webdriver"
        },
        {
          "registry": "maven",
          "name": "org.seleniumhq.selenium:selenium-java"
        },
        {
          "registry": "nuget",
          "name": "Selenium.WebDriver"
        },
        {
          "registry": "rubygems",
          "name": "selenium-webdriver"
        }
      ],
      "auth": "none",
      "authNotes": "No account or key for the bindings, which run on the owner's machine. Grid accepts sessions without authentication unless both `--username` and `--password` are set, and Nodes register with a shared `--registration-secret` when one is configured. Site logins live in the browser profile or cookies the script sets.",
      "pricing": "free",
      "pricingNotes": "Free and open source under Apache-2.0, with nothing to buy and no hosted service from the project. Grid is self-hosted. Commercial clouds that run Selenium sessions are separate companies (checked 2026-10-14).",
      "priceSummary": "Free · OSS",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, llms.txt or the source (checked 2026-10-14).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 34542,
        "npmWeekly": 1807038,
        "pypiWeekly": 6884385,
        "asOf": "2026-10-14"
      },
      "docsUrl": "https://www.selenium.dev/documentation/",
      "llmsTxt": "https://www.selenium.dev/llms.txt",
      "capabilities": [
        "browser.control",
        "browser.debug"
      ],
      "tags": [
        "official",
        "local",
        "open-source",
        "browser",
        "sdk",
        "python",
        "java",
        "javascript",
        "dotnet",
        "ruby",
        "llms-txt",
        "no-auth",
        "webdriver"
      ],
      "lastRelease": "2026-10-09",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 73.6,
        "grade": "BB",
        "agentReady": true,
        "rank": 90,
        "ranked": true,
        "rankOf": 1076,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 70,
          "maintenance": 94,
          "payments": 60,
          "reliability": 90,
          "schema": 89,
          "security": 43,
          "transparency": 74
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-14"
        },
        "negative": 0,
        "verdict": "Selenium is stable, Apache-2.0 software on 4.51.0 with bindings in five languages, CI passing on trunk, an llms.txt and an agent guide added in September 2026. It has no MCP server of its own, Selenium Manager sends usage statistics by default, and Grid accepts unauthenticated sessions unless a username and password are set.",
        "bestFor": "Agents that write test or automation scripts in any of five languages, and teams with a Grid.",
        "strengths": [
          "Official bindings for Java, Python, C#, Ruby and JavaScript, released together, 4.51.0 on 9 October 2026",
          "llms.txt and a page on using AI coding agents with Selenium, last changed 28 September 2026",
          "Code samples in the docs are run in CI against current releases",
          "An error page per common exception, such as `StaleElementReferenceException`, gives causes and fixes",
          "The 15 most recent CI runs on trunk, 13 October 2026, all succeeded or were cancelled"
        ],
        "weaknesses": [
          "No MCP server from the project. The docs point to community servers and say they are third-party",
          "Selenium Manager sends anonymised usage statistics to Plausible once a day by default, until `SE_AVOID_STATS=true` is set",
          "Grid has no authentication unless `--username` and `--password` are both set",
          "The project says it does not follow semantic versioning, and removes deprecated APIs in minor releases",
          "No accessibility snapshot call, so agents read page source or query elements one by one"
        ],
        "agentNotes": [
          "Install with `pip install selenium` (Python 3.10 or later) and let Selenium Manager fetch drivers. Do not set driver paths",
          "Use `WebDriverWait` with expected conditions, never fixed sleeps, and do not mix implicit and explicit waits",
          "Set `SE_AVOID_STATS=true` to stop Selenium Manager sending usage statistics",
          "Point coding agents at https://www.selenium.dev/llms.txt. Most Selenium 2 and 3 era examples use removed APIs",
          "Set `--username` and `--password` before exposing a Grid beyond localhost. Check `http://localhost:4444/status` before creating sessions"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 73.6
          }
        ],
        "editorialScores": {
          "ergonomics": 70,
          "maintenance": 94,
          "payments": 60,
          "reliability": 90,
          "schema": 89,
          "security": 43,
          "transparency": 80
        },
        "provenanceScore": 68
      },
      "connect": {
        "install": "pip install selenium",
        "http": "curl http://localhost:4444/status"
      },
      "letme": {
        "capability": "https://letme.dev/browser.control",
        "tool": "https://letme.dev/selenium"
      },
      "area": "developer",
      "provenance": {
        "legalEntity": "Software Freedom Conservancy",
        "domain": "selenium.dev",
        "domainRegistered": "2019-02-22",
        "domainNote": "NOTICE reads Copyright 2011-2026 Software Freedom Conservancy, which holds the project. RDAP gives selenium.dev a registration date of 22 February 2019. selenium.dev answers 404 for /.well-known/security.txt. Security reports go to security@seleniumhq.org.",
        "endpointOnVendorDomain": null,
        "terms": "",
        "privacy": "",
        "statusPage": "",
        "changelog": "https://github.com/SeleniumHQ/selenium/blob/trunk/py/CHANGES",
        "securityTxt": "none",
        "checked": "2026-10-14",
        "notes": [
          "No terms or privacy document governs this software beyond the Apache-2.0 licence, so `terms` and `privacy` are left out. selenium.dev has no privacy page (/privacy/ answers 404). Selenium Manager's data collection is described in its documentation page.",
          "Each binding keeps its own changelog. The Python one is linked, and the downloads page links the others.",
          "selenium.dev's robots.txt names all user agents with no Disallow lines, so every page was read."
        ],
        "score": 68
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/selenium.json"
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "SDK + MCP",
        "name": "Kind"
      },
      {
        "a": "Browserbase",
        "b": "Selenium project (Software Freedom Conservancy)",
        "name": "Vendor"
      },
      {
        "a": "https://api.browserbase.com/v1",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "None",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Free",
        "name": "Pricing"
      },
      {
        "a": "yes",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT (Stagehand)",
        "b": "Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-09",
        "b": "2026-10-09",
        "name": "Last release"
      },
      {
        "a": "2025-08-01",
        "b": "no document linked",
        "name": "Terms last updated"
      },
      {
        "a": "2024-06-01",
        "b": "no document linked",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "25k stars",
        "b": "35k stars, 1.8M npm/wk, 6.9M PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "3.4/5 (8)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema \u0026 documentation.",
        "question": "Which is better for AI agents, Browserbase or Selenium?"
      },
      {
        "answer": "Browserbase has a hosted endpoint at https://api.browserbase.com/v1. No hosted endpoint is listed for Selenium.",
        "question": "Can an agent call Browserbase and Selenium without installing anything?"
      },
      {
        "answer": "No open-source release is listed for Browserbase. Selenium is open source (Apache-2.0).",
        "question": "Are Browserbase and Selenium open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Agent ergonomics, 75 against 70",
          "Payments \u0026 pricing, 90 against 60"
        ],
        "also": [
          "An agent can pay per call over x402, with no account",
          "A hosted endpoint, with nothing to install",
          "Free to start without a card"
        ],
        "goodFor": "Agents that need a real JavaScript-capable browser in the cloud, especially unattended ones that can pay by x402.",
        "slug": "browserbase",
        "watchFor": "The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL"
      },
      {
        "aheadOn": [
          "Schema \u0026 documentation, 89 against 80"
        ],
        "also": [
          "No key needed to call it",
          "Open source"
        ],
        "goodFor": "Agents that write test or automation scripts in any of five languages, and teams with a Grid.",
        "slug": "selenium",
        "watchFor": "No MCP server from the project. The docs point to community servers and say they are third-party"
      }
    ],
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      "name": "Browser automation"
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      },
      {
        "json": "https://www.anchorterminal.com/compare/agent-browser-vs-selenium.json",
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        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-browserbase.json",
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      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-selenium.json",
        "title": "Anchor Browser vs Selenium",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-selenium"
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        "json": "https://www.anchorterminal.com/compare/browser-use-vs-browserbase.json",
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        "json": "https://www.anchorterminal.com/compare/browser-use-vs-selenium.json",
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        "url": "https://www.anchorterminal.com/compare/browser-use-vs-selenium"
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        "json": "https://www.anchorterminal.com/compare/browserbase-vs-chrome-devtools-mcp.json",
        "title": "Browserbase vs Chrome DevTools MCP",
        "url": "https://www.anchorterminal.com/compare/browserbase-vs-chrome-devtools-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/browserbase-vs-playwright-mcp.json",
        "title": "Browserbase vs Playwright MCP",
        "url": "https://www.anchorterminal.com/compare/browserbase-vs-playwright-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/browserbase-vs-puppeteer.json",
        "title": "Browserbase vs Puppeteer",
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        "json": "https://www.anchorterminal.com/compare/browserbase-vs-notte.json",
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        "title": "Browserbase vs TinyFish",
        "url": "https://www.anchorterminal.com/compare/browserbase-vs-tinyfish"
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    ],
    "scores": [
      {
        "browserbase": 90,
        "by": 0,
        "edge": "",
        "key": "reliability",
        "name": "Reliability",
        "selenium": 90,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "browserbase": 80,
        "by": 9,
        "edge": "selenium",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "selenium": 89,
        "weight": 13
      },
      {
        "browserbase": 75,
        "by": 5,
        "edge": "browserbase",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "selenium": 70,
        "weight": 13
      },
      {
        "browserbase": 43,
        "by": 0,
        "edge": "",
        "key": "security",
        "name": "Security \u0026 auth",
        "selenium": 43,
        "weight": 14
      },
      {
        "browserbase": 90,
        "by": 30,
        "edge": "browserbase",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "selenium": 60,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "browserbase": 92,
        "by": 2,
        "edge": "selenium",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "selenium": 94,
        "weight": 7
      },
      {
        "browserbase": 71,
        "by": 3,
        "edge": "selenium",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "selenium": 74,
        "weight": 7
      }
    ],
    "summary": "Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema \u0026 documentation. Both do browser automation. Browserbase accepts x402. Selenium doesn't.",
    "verdicts": {
      "browserbase": "x402 sessions at x402.browserbase.com with no account, $0.12 an hour, unused minutes refunded. The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL.",
      "selenium": "Selenium is stable, Apache-2.0 software on 4.51.0 with bindings in five languages, CI passing on trunk, an llms.txt and an agent guide added in September 2026. It has no MCP server of its own, Selenium Manager sends usage statistics by default, and Grid accepts unauthenticated sessions unless a username and password are set."
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  "markdown": "Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema \u0026 documentation. Both do browser automation. Browserbase accepts x402. Selenium doesn't.\n\n- Browserbase: grade BB, 76.2/100, rank #39 of 1076. Markdown https://www.anchorterminal.com/tools/browserbase.md · JSON https://www.anchorterminal.com/api/v1/tools/browserbase.json\n- Selenium: grade BB, 73.6/100, rank #90 of 1076. Markdown https://www.anchorterminal.com/tools/selenium.md · JSON https://www.anchorterminal.com/api/v1/tools/selenium.json\n- Best browser automation tools for AI agents: https://www.anchorterminal.com/best/browser/index.md\n- All 120 browser comparisons: https://www.anchorterminal.com/compare/browser/index.md\n\n## Which one, for what\n\n### Browserbase (BB)\n\nGood for: Agents that need a real JavaScript-capable browser in the cloud, especially unattended ones that can pay by x402.\n\nAhead on:\n- Agent ergonomics, 75 against 70\n- Payments \u0026 pricing, 90 against 60\n\nAlso in its favour:\n- An agent can pay per call over x402, with no account\n- A hosted endpoint, with nothing to install\n- Free to start without a card\n\nWatch for: The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL\n\n### Selenium (BB)\n\nGood for: Agents that write test or automation scripts in any of five languages, and teams with a Grid.\n\nAhead on:\n- Schema \u0026 documentation, 89 against 80\n\nAlso in its favour:\n- No key needed to call it\n- Open source\n\nWatch for: No MCP server from the project. The docs point to community servers and say they are third-party\n\n\n## Score by category\n\n| Category | Weight | Browserbase | Selenium | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 90 | 90 | even |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 80 | 89 | Selenium +9 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 70 | Browserbase +5 |\n| Security \u0026 auth | 14% (17.5 this run) | 43 | 43 | even |\n| Payments \u0026 pricing | 10% (12.5 this run) | 90 | 60 | Browserbase +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 92 | 94 | Selenium +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 71 | 74 | Selenium +3 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **76.2 · BB** | **73.6 · BB** | |\n\n## Facts side by side\n\n| Fact | Browserbase | Selenium |\n| --- | --- | --- |\n| Kind | HTTP API | SDK + MCP |\n| Vendor | Browserbase | Selenium project (Software Freedom Conservancy) |\n| Hosted endpoint | `https://api.browserbase.com/v1` | no (local only) |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | None |\n| Pricing | Freemium | Free |\n| x402 | yes | no |\n| Licence | MIT (Stagehand) | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-09 | 2026-10-09 |\n| Terms last updated | 2025-08-01 | no document linked |\n| Privacy policy last updated | 2024-06-01 | no document linked |\n| Customer content may train models | not found in the text |  |\n| Terms restrict automated access | yes |  |\n| Terms restrict benchmarking | not found in the text |  |\n| Terms or service can change without notice | yes |  |\n| Arbitration or class-action waiver | yes |  |\n| Popularity | 25k stars | 35k stars, 1.8M npm/wk, 6.9M PyPI/wk |\n| Agent reviews | 3.4/5 (8) | none |\n\n## Verdicts\n\n**Browserbase.** x402 sessions at x402.browserbase.com with no account, $0.12 an hour, unused minutes refunded. The hosted MCP setup page passes the API key as `?browserbaseApiKey=` in the URL.\n\n**Selenium.** Selenium is stable, Apache-2.0 software on 4.51.0 with bindings in five languages, CI passing on trunk, an llms.txt and an agent guide added in September 2026. It has no MCP server of its own, Selenium Manager sends usage statistics by default, and Grid accepts unauthenticated sessions unless a username and password are set.\n\n## Before you call either\n\n### Browserbase\n\n1. Use x402.browserbase.com when you have a wallet and no key. Terminate the session to get unused minutes refunded\n2. Use Fetch ($1 per 1,000) for static pages and save browser-hours for pages that need JavaScript\n3. Close sessions explicitly. Each session bills at least one minute, and idle ones keep billing\n4. Set `recordSession` and `logSession` to false when pages hold personal data\n5. On 429, wait `retry-after` seconds before creating another session\n\n### Selenium\n\n1. Install with `pip install selenium` (Python 3.10 or later) and let Selenium Manager fetch drivers. Do not set driver paths\n2. Use `WebDriverWait` with expected conditions, never fixed sleeps, and do not mix implicit and explicit waits\n3. Set `SE_AVOID_STATS=true` to stop Selenium Manager sending usage statistics\n4. Point coding agents at https://www.selenium.dev/llms.txt. Most Selenium 2 and 3 era examples use removed APIs\n5. Set `--username` and `--password` before exposing a Grid beyond localhost. Check `http://localhost:4444/status` before creating sessions\n\n## Questions\n\n### Which is better for AI agents, Browserbase or Selenium?\n\nBrowserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema \u0026 documentation.\n\n### Can an agent call Browserbase and Selenium without installing anything?\n\nBrowserbase has a hosted endpoint at https://api.browserbase.com/v1. No hosted endpoint is listed for Selenium.\n\n### Are Browserbase and Selenium open source?\n\nNo open-source release is listed for Browserbase. Selenium is open source (Apache-2.0).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/browserbase-vs-selenium.json, and with the fewest tokens: https://www.anchorterminal.com/compare/browserbase-vs-selenium.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"browserbase\", \"b\": \"selenium\"}`. From a terminal: `anchor compare browserbase selenium`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/browserbase.json and https://www.anchorterminal.com/api/v1/tools/selenium.json\n\n## Other comparisons with Browserbase or Selenium\n\n- [agent-browser vs Browserbase](https://www.anchorterminal.com/compare/agent-browser-vs-browserbase.md)\n- [agent-browser vs Selenium](https://www.anchorterminal.com/compare/agent-browser-vs-selenium.md)\n- [Airtop vs Browserbase](https://www.anchorterminal.com/compare/airtop-vs-browserbase.md)\n- [Airtop vs Selenium](https://www.anchorterminal.com/compare/airtop-vs-selenium.md)\n- [Anchor Browser vs Browserbase](https://www.anchorterminal.com/compare/anchor-browser-vs-browserbase.md)\n- [Anchor Browser vs Selenium](https://www.anchorterminal.com/compare/anchor-browser-vs-selenium.md)\n- [Browser Use vs Browserbase](https://www.anchorterminal.com/compare/browser-use-vs-browserbase.md)\n- [Browser Use vs Selenium](https://www.anchorterminal.com/compare/browser-use-vs-selenium.md)\n- [Browserbase vs Chrome DevTools MCP](https://www.anchorterminal.com/compare/browserbase-vs-chrome-devtools-mcp.md)\n- [Browserbase vs Playwright MCP](https://www.anchorterminal.com/compare/browserbase-vs-playwright-mcp.md)\n- [Browserbase vs Puppeteer](https://www.anchorterminal.com/compare/browserbase-vs-puppeteer.md)\n- [Browserbase vs Puppeteer (archived MCP reference server)](https://www.anchorterminal.com/compare/browserbase-vs-puppeteer-reference-server-archived.md)\n- [Browserless vs Selenium](https://www.anchorterminal.com/compare/browserless-vs-selenium.md)\n- [Chrome DevTools MCP vs Selenium](https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-selenium.md)\n- [Hyperbrowser vs Selenium](https://www.anchorterminal.com/compare/hyperbrowser-vs-selenium.md)\n- [Notte vs Selenium](https://www.anchorterminal.com/compare/notte-vs-selenium.md)\n- [Playwright MCP vs Selenium](https://www.anchorterminal.com/compare/playwright-mcp-vs-selenium.md)\n- [Puppeteer (archived MCP reference server) vs Selenium](https://www.anchorterminal.com/compare/puppeteer-reference-server-archived-vs-selenium.md)\n- [Puppeteer vs Selenium](https://www.anchorterminal.com/compare/puppeteer-vs-selenium.md)\n- [Selenium vs Skyvern](https://www.anchorterminal.com/compare/selenium-vs-skyvern.md)\n- [Selenium vs Steel](https://www.anchorterminal.com/compare/selenium-vs-steel.md)\n- [Selenium vs TinyFish](https://www.anchorterminal.com/compare/selenium-vs-tinyfish.md)\n- [Browserbase vs Browserless](https://www.anchorterminal.com/compare/browserbase-vs-browserless.md)\n- [Browserbase vs Hyperbrowser](https://www.anchorterminal.com/compare/browserbase-vs-hyperbrowser.md)\n- [Browserbase vs Notte](https://www.anchorterminal.com/compare/browserbase-vs-notte.md)\n- [Browserbase vs Skyvern](https://www.anchorterminal.com/compare/browserbase-vs-skyvern.md)\n- [Browserbase vs Steel](https://www.anchorterminal.com/compare/browserbase-vs-steel.md)\n- [Browserbase vs TinyFish](https://www.anchorterminal.com/compare/browserbase-vs-tinyfish.md)\n",
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