{
  "data": {
    "a": {
      "slug": "anchor-browser",
      "name": "Anchor Browser",
      "vendor": "Anchor Forge Inc.",
      "vendorUrl": "https://anchorbrowser.io",
      "kind": "http-api",
      "category": "browser",
      "summary": "Anchor Browser runs cloud browser sessions for AI agents, controlled through a REST API, a CDP WebSocket, TypeScript and Python SDKs and hosted MCP servers. It adds managed logins with MFA, profiles, proxies, CAPTCHA solving and recordings.",
      "url": "https://www.anchorterminal.com/tools/anchor-browser",
      "markdownUrl": "https://www.anchorterminal.com/tools/anchor-browser.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/anchor-browser.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/anchor-browser.json",
      "repo": "https://github.com/anchorbrowser/AnchorBrowser-SDK-Typescript",
      "license": "Proprietary cloud service. No service agreement was found, only a website terms of use. The TypeScript and Python SDKs and the self-hosted MCP server are Apache-2.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.anchorbrowser.io",
      "packages": [
        {
          "registry": "npm",
          "name": "anchorbrowser"
        },
        {
          "registry": "pypi",
          "name": "anchorbrowser"
        }
      ],
      "auth": "mixed",
      "authNotes": "API key in the `anchor-api-key` header, created in the dashboard at app.anchorbrowser.io or issued by Agent Access, an unauthenticated puzzle flow that needs no account. The hosted MCP servers also accept OAuth sign-in through signin.anchorbrowser.io, with `mcp:tools` and `mcp:admin` scopes in the resource metadata. CDP connections pass the key as the `apiKey` query parameter on `wss://connect.anchorbrowser.io`. No key scopes, expiry or rotation guidance were found. Teams that enforce Agent Access identity also send `anchor-identity-token`.",
      "pricing": "freemium",
      "pricingNotes": "The Free plan has $5 of credits a month, and Agent Access gives an agent 1 credit with no account. Usage is $0.01 a browser created, $0.05 a browser-hour counted to the minute, $8 a GB through Anchor's proxy and $0.20 a GB otherwise. AI steps cost $0.01, $0.05 or $0.10 by model tier from 21 August 2026. Starter is $50 a month and Growth $2,000, with overage at $1 a credit. Enterprise is priced through sales (https://docs.anchorbrowser.io/pricing, checked 2026-10-08).",
      "priceSummary": "$0.01 / call",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "A blog post dated 29 August 2025 shows x402 payment on POST https://api.anchorbrowser.io/v1/sessions and says it is enabled per project. An unpaid POST on 2026-10-08 returned 401 with no payment terms, and the docs and OpenAPI document describe `x402` only as a session option that lets the browser pay other sites through Amazon Bedrock AgentCore Payments.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 43004,
        "pypiWeekly": 10135,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://docs.anchorbrowser.io",
      "llmsTxt": "https://docs.anchorbrowser.io/llms.txt",
      "openapi": "https://docs.anchorbrowser.io/openapi.yaml",
      "capabilities": [
        "browser.control",
        "browser.hosted",
        "browser.debug",
        "web.fetch",
        "web.scrape",
        "scraping.proxies",
        "scraping.anti-bot",
        "pdf.generate"
      ],
      "tags": [
        "official",
        "hosted",
        "freemium",
        "no-card",
        "openapi",
        "llms-txt",
        "mcp",
        "oauth",
        "python",
        "typescript",
        "proxies",
        "status-page",
        "soc2"
      ],
      "lastRelease": "2026-07-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.3,
        "grade": "B",
        "agentReady": false,
        "rank": 269,
        "ranked": true,
        "rankOf": 1076,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 73,
          "maintenance": 57,
          "payments": 60,
          "reliability": 80,
          "schema": 80,
          "security": 54,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "The API has a public OpenAPI 3.1 document, per-unit prices and Agent Access, an unauthenticated flow that issues a trial API key without a dashboard account. No service agreement is published, only a website terms of use, and the documented CDP connection puts the API key in the URL.",
        "bestFor": "Agents that must work inside signed-in accounts, with managed identities, MFA handling and a human sign-in link, and agents that need to start with no human signup.",
        "strengths": [
          "Agent Access issues an API key through two unauthenticated calls and a puzzle, with 1 trial credit, or 5 with a verified-email OIDC token",
          "OpenAPI 3.1 document with 101 paths and 136 operations, llms.txt, llms-full.txt and a Markdown twin of every docs page",
          "Per-unit prices published without login, $0.01 a browser, $0.05 a browser-hour and $8 a GB of proxy traffic",
          "Hosted MCP servers at api.anchorbrowser.io/v1/mcp accept OAuth sign-in or the API key header, with read and write endpoint calls as separate tools",
          "Managed identities sign in and handle MFA without returning credentials to the agent, and secrets can be limited to matching domains, per the docs"
        ],
        "weaknesses": [
          "No service agreement or API terms found. anchorbrowser.io/terms is a website terms of use dated 16 March 2025",
          "The documented CDP connection passes the API key as `apiKey` in the `wss://connect.anchorbrowser.io` URL",
          "No changelog, deprecation policy or published SLA found, and docs.anchorbrowser.io/changelog returns 404",
          "The status page lists two components, Website and Anchor Application, and its incident feed has never held an entry",
          "A 2025 blog post describes x402 payment on `POST /v1/sessions`, but an unpaid request on 8 October 2026 returned 401, not 402"
        ],
        "agentNotes": [
          "Send the key in the `anchor-api-key` header. For CDP, build `wss://connect.anchorbrowser.io?apiKey=\u003ckey\u003e\u0026sessionId=\u003cid\u003e` and keep that URL out of logs",
          "Set `session.timeout.idle_timeout` and `max_duration` and end sessions with DELETE. The default maximum is 180 minutes, and browser time bills by the minute",
          "Session creation is capped at 5 a minute on Free, 25 on Starter and 100 on Growth. On 429, wait for the `Retry-After` seconds",
          "Connect the `Anchor` MCP server or `Anchor (all)`, not both, because the docs say the pair duplicates tool names",
          "Authenticated browsers, CAPTCHA solving and proxies by country need the Starter plan or higher. The Free plan and Agent Access keys run plain sessions and web tasks"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.3
          }
        ],
        "editorialScores": {
          "ergonomics": 73,
          "maintenance": 57,
          "payments": 60,
          "reliability": 80,
          "schema": 80,
          "security": 54,
          "transparency": 40
        },
        "provenanceScore": 61
      },
      "connect": {
        "install": "npm install anchorbrowser",
        "http": "curl -X POST https://api.anchorbrowser.io/v1/tools/perform-web-task -H \"anchor-api-key: YOUR_API_KEY\" -H \"Content-Type: application/json\" -d '{\"prompt\":\"Go to example.com and return the page title\",\"url\":\"https://example.com\"}'",
        "claudeCode": "claude mcp add --transport http anchor https://api.anchorbrowser.io/v1/mcp",
        "config": {
          "mcpServers": {
            "anchor": {
              "headers": {
                "anchor-api-key": "YOUR_ANCHOR_API_KEY"
              },
              "url": "https://api.anchorbrowser.io/v1/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/browser.control",
        "tool": "https://letme.dev/anchor-browser"
      },
      "area": "developer",
      "unitPrices": [
        {
          "item": "Browser creation",
          "unit": "call",
          "usd": 0.01,
          "note": "Per browser instance created"
        },
        {
          "item": "Browser usage",
          "unit": "browser-hour",
          "usd": 0.05,
          "note": "Counted to the nearest full minute"
        },
        {
          "item": "Anchor proxy traffic",
          "unit": "gb",
          "usd": 8
        },
        {
          "item": "Egress with your own proxy or none",
          "unit": "gb",
          "usd": 0.2
        },
        {
          "item": "AI step, Light model tier",
          "unit": "call",
          "usd": 0.01,
          "note": "Also the flat rate with your own model key"
        },
        {
          "item": "AI step, Standard model tier",
          "unit": "call",
          "usd": 0.05
        },
        {
          "item": "AI step, High Performance model tier",
          "unit": "call",
          "usd": 0.1
        },
        {
          "item": "Overage credit, Starter and Growth",
          "unit": "credit",
          "usd": 1
        },
        {
          "item": "Starter plan",
          "unit": "month",
          "usd": 50
        },
        {
          "item": "Growth plan",
          "unit": "month",
          "usd": 2000
        }
      ],
      "provenance": {
        "legalEntity": "Anchor Forge Inc.",
        "domain": "anchorbrowser.io",
        "domainRegistered": "2024-09-18",
        "endpointOnVendorDomain": true,
        "terms": "",
        "privacy": "https://anchorbrowser.io/privacy-policy",
        "statusPage": "https://status.anchorbrowser.io",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The website terms of use (last updated 16 March 2025) and the privacy policy (last updated 24 February 2026) name Anchor Forge Inc. and its affiliates. The terms choose New York law.",
          "No terms URL is recorded. anchorbrowser.io/terms is a website terms of use that grants personal, non-commercial use of the site, and no service agreement or API terms were found.",
          "The privacy policy is written for the website and customer contacts and has one product section, on Gmail access for sign-in codes. A DPA is listed in the trust portal behind an access request.",
          "The API and MCP servers answer at api.anchorbrowser.io, CDP at connect.anchorbrowser.io and OAuth sign-in at signin.anchorbrowser.io.",
          "anchorbrowser.io/.well-known/security.txt and docs.anchorbrowser.io/.well-known/security.txt both return 404. The trust portal at trust.anchorbrowser.io runs on SafeBase.",
          "RDAP for anchorbrowser.io gives a registration date of 2024-09-18.",
          "docs.anchorbrowser.io/changelog returns 404 and no API changelog was found."
        ],
        "score": 61
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/anchor-browser.json",
      "live": {
        "slug": "anchor-browser",
        "probe": {
          "target": "https://api.anchorbrowser.io",
          "method": "get",
          "lastAt": "2026-10-14T09:41:41.137139182Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 374,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 392,
          "p95ms24h": 430,
          "samples24h": 248,
          "samples30d": 1409,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 70,
              "ok": 70
            },
            {
              "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.anchorbrowser.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-14T09:38:51.339685504Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "anchorbrowser/AnchorBrowser-SDK-Typescript",
            "version": "v0.16.3",
            "released": "2026-03-19",
            "seenAt": "2026-10-13T22:42:48.231299355Z"
          },
          {
            "registry": "npm",
            "name": "anchorbrowser",
            "version": "1.0.0",
            "seenAt": "2026-10-13T22:42:47.258345675Z"
          },
          {
            "registry": "pypi",
            "name": "anchorbrowser",
            "version": "1.0.1",
            "released": "2026-07-28",
            "seenAt": "2026-10-13T22:42:48.033346608Z"
          }
        ],
        "githubStars": 5,
        "npmWeekly": 31816,
        "pypiWeekly": 9960,
        "securityTxt": {
          "url": "https://anchorbrowser.io/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-13T15:44:55.385550402Z"
        },
        "llmsTxt": {
          "url": "https://docs.anchorbrowser.io/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-13T14:10:52.605085979Z"
        },
        "domain": {
          "domain": "anchorbrowser.io",
          "checkedAt": "2026-10-11T13:16:38.957901172Z"
        },
        "pages": [
          {
            "url": "https://docs.anchorbrowser.io/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-13T20:13:58.530104921Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "d1115f8035fb"
          },
          {
            "url": "https://anchorbrowser.io/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-13T20:10:03.311645569Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "5503a044040d"
          }
        ],
        "updatedAt": "2026-10-14T09:41:41.137139182Z"
      }
    },
    "answer": "Selenium scores 73.6 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 4 of 7 scored categories. Anchor Browser leads on security \u0026 auth.",
    "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": "Anchor Forge Inc.",
        "b": "Selenium project (Software Freedom Conservancy)",
        "name": "Vendor"
      },
      {
        "a": "https://api.anchorbrowser.io",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "None",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Free",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary cloud service. No service agreement was found, only a website terms of use. The TypeScript and Python SDKs and the self-hosted MCP server are Apache-2.0",
        "b": "Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-07-28",
        "b": "2026-10-09",
        "name": "Last release"
      },
      {
        "a": "no document linked",
        "b": "no document linked",
        "name": "Terms last updated"
      },
      {
        "a": "2026-02-24",
        "b": "no document linked",
        "name": "Privacy policy last updated"
      },
      {
        "a": "",
        "b": "",
        "name": "Customer content may train models"
      },
      {
        "a": "",
        "b": "",
        "name": "Terms restrict automated access"
      },
      {
        "a": "",
        "b": "",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "",
        "b": "",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "",
        "b": "",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "43k npm/wk, 10k PyPI/wk",
        "b": "35k stars, 1.8M npm/wk, 6.9M PyPI/wk",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Selenium scores 73.6 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 4 of 7 scored categories. Anchor Browser leads on security \u0026 auth.",
        "question": "Which is better for AI agents, Anchor Browser or Selenium?"
      },
      {
        "answer": "Anchor Browser has a hosted endpoint at https://api.anchorbrowser.io. No hosted endpoint is listed for Selenium.",
        "question": "Can an agent call Anchor Browser and Selenium without installing anything?"
      },
      {
        "answer": "No open-source release is listed for Anchor Browser. Selenium is open source (Apache-2.0).",
        "question": "Are Anchor Browser and Selenium open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Security \u0026 auth, 54 against 43"
        ],
        "also": [
          "A hosted endpoint, with nothing to install",
          "Free to start without a card"
        ],
        "goodFor": "Agents that must work inside signed-in accounts, with managed identities, MFA handling and a human sign-in link, and agents that need to start with no human signup.",
        "slug": "anchor-browser",
        "watchFor": "No service agreement or API terms found. anchorbrowser.io/terms is a website terms of use dated 16 March 2025"
      },
      {
        "aheadOn": [
          "Reliability, 90 against 80",
          "Schema \u0026 documentation, 89 against 80",
          "Maintenance \u0026 community, 94 against 57",
          "Transparency \u0026 trust, 74 against 51"
        ],
        "also": [
          "Agent-ready, a grade of BB or better",
          "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"
      }
    ],
    "job": {
      "capability": "browser.control",
      "name": "Browser automation"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/agent-browser-vs-anchor-browser.json",
        "title": "agent-browser vs Anchor Browser",
        "url": "https://www.anchorterminal.com/compare/agent-browser-vs-anchor-browser"
      },
      {
        "json": "https://www.anchorterminal.com/compare/agent-browser-vs-selenium.json",
        "title": "agent-browser vs Selenium",
        "url": "https://www.anchorterminal.com/compare/agent-browser-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/airtop-vs-anchor-browser.json",
        "title": "Airtop vs Anchor Browser",
        "url": "https://www.anchorterminal.com/compare/airtop-vs-anchor-browser"
      },
      {
        "json": "https://www.anchorterminal.com/compare/airtop-vs-selenium.json",
        "title": "Airtop vs Selenium",
        "url": "https://www.anchorterminal.com/compare/airtop-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-browser-use.json",
        "title": "Anchor Browser vs Browser Use",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-browser-use"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-browserbase.json",
        "title": "Anchor Browser vs Browserbase",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-browserbase"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-browserless.json",
        "title": "Anchor Browser vs Browserless",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-browserless"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-chrome-devtools-mcp.json",
        "title": "Anchor Browser vs Chrome DevTools MCP",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-chrome-devtools-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-hyperbrowser.json",
        "title": "Anchor Browser vs Hyperbrowser",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-hyperbrowser"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-notte.json",
        "title": "Anchor Browser vs Notte",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-notte"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-playwright-mcp.json",
        "title": "Anchor Browser vs Playwright MCP",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-playwright-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer.json",
        "title": "Anchor Browser vs Puppeteer",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer-reference-server-archived.json",
        "title": "Anchor Browser vs Puppeteer (archived MCP reference server)",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer-reference-server-archived"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-skyvern.json",
        "title": "Anchor Browser vs Skyvern",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-skyvern"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-steel.json",
        "title": "Anchor Browser vs Steel",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-steel"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anchor-browser-vs-tinyfish.json",
        "title": "Anchor Browser vs TinyFish",
        "url": "https://www.anchorterminal.com/compare/anchor-browser-vs-tinyfish"
      },
      {
        "json": "https://www.anchorterminal.com/compare/browser-use-vs-selenium.json",
        "title": "Browser Use vs Selenium",
        "url": "https://www.anchorterminal.com/compare/browser-use-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/browserbase-vs-selenium.json",
        "title": "Browserbase vs Selenium",
        "url": "https://www.anchorterminal.com/compare/browserbase-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/browserless-vs-selenium.json",
        "title": "Browserless vs Selenium",
        "url": "https://www.anchorterminal.com/compare/browserless-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-selenium.json",
        "title": "Chrome DevTools MCP vs Selenium",
        "url": "https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hyperbrowser-vs-selenium.json",
        "title": "Hyperbrowser vs Selenium",
        "url": "https://www.anchorterminal.com/compare/hyperbrowser-vs-selenium"
      },
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        "json": "https://www.anchorterminal.com/compare/notte-vs-selenium.json",
        "title": "Notte vs Selenium",
        "url": "https://www.anchorterminal.com/compare/notte-vs-selenium"
      },
      {
        "json": "https://www.anchorterminal.com/compare/playwright-mcp-vs-selenium.json",
        "title": "Playwright MCP vs Selenium",
        "url": "https://www.anchorterminal.com/compare/playwright-mcp-vs-selenium"
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      {
        "json": "https://www.anchorterminal.com/compare/puppeteer-reference-server-archived-vs-selenium.json",
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        "json": "https://www.anchorterminal.com/compare/puppeteer-vs-selenium.json",
        "title": "Puppeteer vs Selenium",
        "url": "https://www.anchorterminal.com/compare/puppeteer-vs-selenium"
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        "json": "https://www.anchorterminal.com/compare/selenium-vs-skyvern.json",
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        "json": "https://www.anchorterminal.com/compare/selenium-vs-steel.json",
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      {
        "json": "https://www.anchorterminal.com/compare/selenium-vs-tinyfish.json",
        "title": "Selenium vs TinyFish",
        "url": "https://www.anchorterminal.com/compare/selenium-vs-tinyfish"
      }
    ],
    "scores": [
      {
        "anchor-browser": 80,
        "by": 10,
        "edge": "selenium",
        "key": "reliability",
        "name": "Reliability",
        "selenium": 90,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "anchor-browser": 80,
        "by": 9,
        "edge": "selenium",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "selenium": 89,
        "weight": 13
      },
      {
        "anchor-browser": 73,
        "by": 3,
        "edge": "anchor-browser",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "selenium": 70,
        "weight": 13
      },
      {
        "anchor-browser": 54,
        "by": 11,
        "edge": "anchor-browser",
        "key": "security",
        "name": "Security \u0026 auth",
        "selenium": 43,
        "weight": 14
      },
      {
        "anchor-browser": 60,
        "by": 0,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "selenium": 60,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "anchor-browser": 57,
        "by": 37,
        "edge": "selenium",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "selenium": 94,
        "weight": 7
      },
      {
        "anchor-browser": 51,
        "by": 23,
        "edge": "selenium",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "selenium": 74,
        "weight": 7
      }
    ],
    "summary": "Selenium scores 73.6 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 4 of 7 scored categories. Anchor Browser leads on security \u0026 auth. Both do browser automation.",
    "verdicts": {
      "anchor-browser": "The API has a public OpenAPI 3.1 document, per-unit prices and Agent Access, an unauthenticated flow that issues a trial API key without a dashboard account. No service agreement is published, only a website terms of use, and the documented CDP connection puts the API key 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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    "llms": "https://www.anchorterminal.com/llms.txt",
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  "markdown": "Selenium scores 73.6 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 4 of 7 scored categories. Anchor Browser leads on security \u0026 auth. Both do browser automation.\n\n- Anchor Browser: grade B, 67.3/100, rank #269 of 1076. Markdown https://www.anchorterminal.com/tools/anchor-browser.md · JSON https://www.anchorterminal.com/api/v1/tools/anchor-browser.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### Anchor Browser (B)\n\nGood for: Agents that must work inside signed-in accounts, with managed identities, MFA handling and a human sign-in link, and agents that need to start with no human signup.\n\nAhead on:\n- Security \u0026 auth, 54 against 43\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Free to start without a card\n\nWatch for: No service agreement or API terms found. anchorbrowser.io/terms is a website terms of use dated 16 March 2025\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- Reliability, 90 against 80\n- Schema \u0026 documentation, 89 against 80\n- Maintenance \u0026 community, 94 against 57\n- Transparency \u0026 trust, 74 against 51\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\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 | Anchor Browser | Selenium | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 90 | Selenium +10 |\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) | 73 | 70 | Anchor Browser +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 54 | 43 | Anchor Browser +11 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 60 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 57 | 94 | Selenium +37 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 51 | 74 | Selenium +23 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **67.3 · B** | **73.6 · BB** | |\n\n## Facts side by side\n\n| Fact | Anchor Browser | Selenium |\n| --- | --- | --- |\n| Kind | HTTP API | SDK + MCP |\n| Vendor | Anchor Forge Inc. | Selenium project (Software Freedom Conservancy) |\n| Hosted endpoint | `https://api.anchorbrowser.io` | no (local only) |\n| Transports | HTTP | HTTP |\n| Auth | OAuth or key | None |\n| Pricing | Freemium | Free |\n| x402 | no | no |\n| Licence | Proprietary cloud service. No service agreement was found, only a website terms of use. The TypeScript and Python SDKs and the self-hosted MCP server are Apache-2.0 | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-07-28 | 2026-10-09 |\n| Terms last updated | no document linked | no document linked |\n| Privacy policy last updated | 2026-02-24 | no document linked |\n| Customer content may train models |  |  |\n| Terms restrict automated access |  |  |\n| Terms restrict benchmarking |  |  |\n| Terms or service can change without notice |  |  |\n| Arbitration or class-action waiver |  |  |\n| Popularity | 43k npm/wk, 10k PyPI/wk | 35k stars, 1.8M npm/wk, 6.9M PyPI/wk |\n\n## Verdicts\n\n**Anchor Browser.** The API has a public OpenAPI 3.1 document, per-unit prices and Agent Access, an unauthenticated flow that issues a trial API key without a dashboard account. No service agreement is published, only a website terms of use, and the documented CDP connection puts the API key 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### Anchor Browser\n\n1. Send the key in the `anchor-api-key` header. For CDP, build `wss://connect.anchorbrowser.io?apiKey=\u003ckey\u003e\u0026sessionId=\u003cid\u003e` and keep that URL out of logs\n2. Set `session.timeout.idle_timeout` and `max_duration` and end sessions with DELETE. The default maximum is 180 minutes, and browser time bills by the minute\n3. Session creation is capped at 5 a minute on Free, 25 on Starter and 100 on Growth. On 429, wait for the `Retry-After` seconds\n4. Connect the `Anchor` MCP server or `Anchor (all)`, not both, because the docs say the pair duplicates tool names\n5. Authenticated browsers, CAPTCHA solving and proxies by country need the Starter plan or higher. The Free plan and Agent Access keys run plain sessions and web tasks\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, Anchor Browser or Selenium?\n\nSelenium scores 73.6 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 4 of 7 scored categories. Anchor Browser leads on security \u0026 auth.\n\n### Can an agent call Anchor Browser and Selenium without installing anything?\n\nAnchor Browser has a hosted endpoint at https://api.anchorbrowser.io. No hosted endpoint is listed for Selenium.\n\n### Are Anchor Browser and Selenium open source?\n\nNo open-source release is listed for Anchor Browser. Selenium is open source (Apache-2.0).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/anchor-browser-vs-selenium.json, and with the fewest tokens: https://www.anchorterminal.com/compare/anchor-browser-vs-selenium.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"anchor-browser\", \"b\": \"selenium\"}`. From a terminal: `anchor compare anchor-browser selenium`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/anchor-browser.json and https://www.anchorterminal.com/api/v1/tools/selenium.json\n\n## Other comparisons with Anchor Browser or Selenium\n\n- [agent-browser vs Anchor Browser](https://www.anchorterminal.com/compare/agent-browser-vs-anchor-browser.md)\n- [agent-browser vs Selenium](https://www.anchorterminal.com/compare/agent-browser-vs-selenium.md)\n- [Airtop vs Anchor Browser](https://www.anchorterminal.com/compare/airtop-vs-anchor-browser.md)\n- [Airtop vs Selenium](https://www.anchorterminal.com/compare/airtop-vs-selenium.md)\n- [Anchor Browser vs Browser Use](https://www.anchorterminal.com/compare/anchor-browser-vs-browser-use.md)\n- [Anchor Browser vs Browserbase](https://www.anchorterminal.com/compare/anchor-browser-vs-browserbase.md)\n- [Anchor Browser vs Browserless](https://www.anchorterminal.com/compare/anchor-browser-vs-browserless.md)\n- [Anchor Browser vs Chrome DevTools MCP](https://www.anchorterminal.com/compare/anchor-browser-vs-chrome-devtools-mcp.md)\n- [Anchor Browser vs Hyperbrowser](https://www.anchorterminal.com/compare/anchor-browser-vs-hyperbrowser.md)\n- [Anchor Browser vs Notte](https://www.anchorterminal.com/compare/anchor-browser-vs-notte.md)\n- [Anchor Browser vs Playwright MCP](https://www.anchorterminal.com/compare/anchor-browser-vs-playwright-mcp.md)\n- [Anchor Browser vs Puppeteer](https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer.md)\n- [Anchor Browser vs Puppeteer (archived MCP reference server)](https://www.anchorterminal.com/compare/anchor-browser-vs-puppeteer-reference-server-archived.md)\n- [Anchor Browser vs Skyvern](https://www.anchorterminal.com/compare/anchor-browser-vs-skyvern.md)\n- [Anchor Browser vs Steel](https://www.anchorterminal.com/compare/anchor-browser-vs-steel.md)\n- [Anchor Browser vs TinyFish](https://www.anchorterminal.com/compare/anchor-browser-vs-tinyfish.md)\n- [Browser Use vs Selenium](https://www.anchorterminal.com/compare/browser-use-vs-selenium.md)\n- [Browserbase vs Selenium](https://www.anchorterminal.com/compare/browserbase-vs-selenium.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",
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