{ "data": { "a": { "slug": "majestic", "name": "Majestic API", "vendor": "Majestic (Majestic-12 Limited)", "vendorUrl": "https://majestic.com", "kind": "http-api", "category": "seo", "summary": "Majestic crawls the web and sells backlink data. Its HTTP API returns backlinks, referring domains, anchor text, Trust Flow and Citation Flow scores and keyword counts from a Fresh and a Historic index, as XML or JSON.", "url": "https://www.anchorterminal.com/tools/majestic", "markdownUrl": "https://www.anchorterminal.com/tools/majestic.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/majestic.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/majestic.json", "repo": "https://github.com/majestic/Python3-API-Connector", "license": "Proprietary service under Majestic's Terms and Conditions. The Python 3 connector on GitHub carries a BSD-style licence file", "transports": [ "http" ], "remoteUrl": "https://api.majestic.com", "packages": [], "auth": "api-key", "authNotes": "An API key, sent as the `app_api_key` parameter by POST or GET, or as a cookie on GET requests. Keys are created under My Account, API Keys, and only on an API plan or the legacy Platinum plan. An account can hold several keys, each of which can be disabled and limited to IP addresses or CIDR ranges. Keys have no scopes. Third-party apps use OpenApps instead, where each user approves the app once and the app sends its private key with that user's access token. Resale of the data needs a reseller agreement through sales.", "pricing": "paid", "pricingNotes": "API access needs the API plan, $399.99 a month or $3,999.90 a year for 100 million analysis units, 20 million retrieval units and 500,000 index item units a month. The 300 million tier is $799.99 a month and the 1,000 million tier $1,599.99. Lite ($49.99) and Pro ($99.99) have no API access. No trial or free API key was found, and the 7-day refund covers Lite and Pro only. A sandbox endpoint costs no units but needs a key from a paid API plan. Prices exclude VAT (checked 2026-10-09).", "priceSummary": "$399.99 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs, either llms.txt or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 3, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://developer-support.majestic.com/", "llmsTxt": "https://developer-support.majestic.com/llms.txt", "capabilities": [ "seo.backlinks", "seo.keywords" ], "tags": [ "official", "hosted", "api-key", "closed-source", "plan-only", "llms-txt", "xml", "sandbox", "ip-allowlist", "backlinks" ], "graded": true, "anchor": { "graded": true, "score": 33.4, "grade": "F", "agentReady": false, "rank": 937, "ranked": true, "rankOf": 950, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 54, "maintenance": 22, "payments": 15, "reliability": 17, "schema": 44, "security": 32, "transparency": 53 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "Each command's cost in units is published and a sandbox endpoint returns sample data without spending allowance. API access starts at $399.99 a month with no trial, and no OpenAPI file, status page, numeric rate limit, SLA or API changelog was found. The supply terms require permission before querying with automated tools.", "bestFor": "An agent that needs backlink, referring domain, anchor text and Trust Flow data in volume for an owner who already pays for the API plan.", "strengths": [ "Every command page states its cost in analysis units, and `GetSubscriptionInfo` returns the remaining allowances at no cost", "A sandbox endpoint at `developer.majestic.com` answers the same commands from a reduced Historic data set without spending allowance", "Several API keys per account, each of which can be disabled and limited to IPv4 addresses or CIDR ranges, with an IP activity page per key", "`GetIndexItemInfo` takes up to 100 items a call and `GetKeywordInfo` up to 1,000 keywords, and `GetBackLinkData` has `Count`, `From`, sorting and a `Filters` expression", "Both docs hosts publish an `llms.txt`, and the developer one (dated 26 January 2026) links an `llms-full.txt` of all 39 pages" ], "weaknesses": [ "Clause 14.1(f) of the supply terms forbids querying Majestic's database or servers with automated tools without prior permission. This matters before any probe is run", "API access needs the API plan, from $399.99 a month for 100 million analysis units. No trial or free key was found, and the 7-day refund covers Lite and Pro only", "No OpenAPI file, no API version and no API changelog were found. Sample responses in the docs carry 2017 index dates", "No status page, SLA or numeric rate limit was found. The terms allow throttling at Majestic's discretion and disclaim liability for unavailability", "The docs show the key as an `app_api_key` URL parameter and say plain HTTP is still accepted for legacy clients", "The connectors on GitHub were last updated between March 2016 and September 2021 and are not on a package registry" ], "agentNotes": [ "Send requests by HTTPS POST with `app_api_key` in the body. The docs show GET URLs for demonstration only and plain HTTP still works", "Always set `datasource=fresh` or `datasource=historic`. Without it the Historic Index is used when the plan includes it", "Call `GetSubscriptionInfo` (no cost) before a large pull. `GetBackLinkData` spends 5,000 analysis units a call plus one retrieval unit a row", "Read columns by header name, not position. The docs say column order can change between requests and Majestic may vary rows and columns at any time", "Develop against `https://developer.majestic.com/api/json`, which costs no units, then switch the host to `api.majestic.com`", "Ask the owner to confirm Majestic's permission for automated querying first. Clause 14.1(f) of the terms requires it" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 33.4 } ], "editorialScores": { "ergonomics": 54, "maintenance": 22, "payments": 15, "reliability": 17, "schema": 44, "security": 32, "transparency": 43 }, "provenanceScore": 63 }, "connect": { "http": "curl -X POST 'https://developer.majestic.com/api/json' -d 'app_api_key=API_KEY' -d 'cmd=GetIndexItemInfo' -d 'items=1' -d 'item0=majestic.com' -d 'datasource=fresh'" }, "letme": { "capability": "https://letme.dev/seo.backlinks", "tool": "https://letme.dev/majestic" }, "area": "web-data", "unitPrices": [ { "item": "API plan, 100 million analysis units a month", "unit": "month", "usd": 399.99, "note": "with 20 million retrieval units and 500,000 index item units. $3,999.90 billed annually. Excludes VAT" }, { "item": "API plan, 300 million analysis units a month", "unit": "month", "usd": 799.99, "note": "$7,999.90 billed annually. Excludes VAT" }, { "item": "API plan, 1,000 million analysis units a month", "unit": "month", "usd": 1599.99, "note": "$15,999.90 billed annually. Excludes VAT" }, { "item": "GetBackLinkData, per call", "unit": "call", "usd": 0.02, "note": "our arithmetic. 5,000 of the 100 million analysis units in the $399.99 plan, before retrieval units for rows returned" } ], "provenance": { "legalEntity": "Majestic-12 Limited", "domain": "majestic.com", "domainRegistered": "2001-05-03", "endpointOnVendorDomain": true, "terms": "https://majestic.com/company/terms", "privacy": "https://majestic.com/company/privacy-policy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The Terms and Conditions (released 13 April 2026) are one page holding the Terms of Website Use, the Acceptable Use Policy and the Terms and Conditions of Supply. The last of these is the subscription contract and names Majestic-12 Limited, company number 05269210, of iCentrum, Holt Street, Birmingham.", "No API-specific terms were found. The supply terms still name Free, Silver, Gold and Platinum subscription levels, which are not the plans on the pricing page.", "The privacy policy applies from 3 May 2019 and says it was last updated in April 2026. It names Majestic-12 Limited as controller.", "The API answers at api.majestic.com and the sandbox at developer.majestic.com.", "majestic.com/.well-known/security.txt returned 404.", "No status page is linked from the site footer, the developer docs or either llms.txt. Site updates are behind the account login.", "RDAP for majestic.com gives a registration date of 2001-05-03.", "majestic.com/robots.txt disallows /business/ for unnamed agents and carries no Content-Signal line. developer-support.majestic.com has no robots.txt (404)." ], "score": 63 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/majestic.json", "live": { "slug": "majestic", "probe": { "target": "https://api.majestic.com", "method": "get", "lastAt": "2026-10-10T03:53:33.451870341Z", "lastOk": true, "lastStatus": 403, "lastMs": 30, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 34, "p95ms24h": 106, "samples24h": 125, "samples30d": 125, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "githubStars": 3, "pages": [ { "url": "https://majestic.com/company/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:41:42.95940596Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "1a06eaa10f9e" }, { "url": "https://majestic.com/company/terms", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:41:45.030991177Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0812670ad36f" } ], "updatedAt": "2026-10-10T03:53:33.451870341Z" } }, "answer": "Similarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments \u0026 pricing.", "b": { "slug": "similarweb", "name": "Similarweb", "vendor": "Similarweb Ltd.", "vendorUrl": "https://www.similarweb.com", "kind": "http-api", "category": "seo", "summary": "Similarweb estimates website and app traffic from panel and other data sources. Its REST and Batch APIs and a hosted MCP server return visits, engagement, traffic channels, keywords and SERP data for a domain, under a paid subscription.", "url": "https://www.anchorterminal.com/tools/similarweb", "markdownUrl": "https://www.anchorterminal.com/tools/similarweb.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/similarweb.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/similarweb.json", "license": "Proprietary service under Similarweb's terms of use", "transports": [ "http" ], "remoteUrl": "https://api.similarweb.com", "packages": [], "auth": "mixed", "authNotes": "A paid subscription with API access is required (Business, Enterprise or the API-only package, bought through sales). An account admin creates keys in the platform under Settings, Account. Requests carry the key in an `api-key` header. Each user can hold up to 3 active keys with no expiry, and admins can deactivate keys and cap credits per user. The MCP server also accepts OAuth through mcp-auth.similarweb.com with dynamic client registration and a single `read` scope, signed in with a Similarweb login.", "pricing": "paid", "pricingNotes": "No public API price. API and MCP access come with Business and Enterprise plans or a standalone API package, all quoted by sales. Usage is metered in data credits that reset monthly. The FAQ says an active subscription with API access is needed to test the API, so no sandbox or free tier was found. Self-serve Web Intelligence plans start at $125 a month billed annually, and the docs say Starter and Professional plans may not include API access (checked 2026-10-08).", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs or on the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://docs.similarweb.com/api-v5/", "llmsTxt": "https://docs.similarweb.com/api-v5/llms.txt", "capabilities": [ "seo.traffic", "seo.keywords", "seo.serp", "seo.rankings", "lead.enrichment", "data.company" ], "tags": [ "hosted", "paid", "sales-led", "api-key", "oauth", "mcp", "llms-txt", "batch", "webhooks", "soc2" ], "lastRelease": "2026-09-24", "graded": true, "anchor": { "graded": true, "score": 46, "grade": "D", "agentReady": false, "rank": 858, "ranked": true, "rankOf": 950, "categoryRank": 8, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 33, "payments": 5, "reliability": 35, "schema": 63, "security": 52, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "The V5 API returns traffic estimates, keyword clicks and SERP positions with selectable metrics, and the hosted MCP server accepts OAuth with a read scope. Access needs a Business, Enterprise or API-only subscription sold through sales, with no API trial, public price per credit or public status page found.", "bestFor": "Traffic and engagement estimates, traffic channel mix and keyword click data for domains an agent doesn't own, with app, company and retail data on the same key.", "strengths": [ "Hosted MCP server at https://mcp.similarweb.com accepts an `api-key` header or OAuth, with dynamic client registration and one `read` scope", "V5 endpoints take a `metrics` list, so one request returns only the fields asked for, and each result costs one data credit", "Keyword endpoints cost one credit per 100 results, and errors and empty responses aren't charged, per the data credits guide", "Both documentation sites publish llms.txt and a Markdown copy of every page", "Admins can cap credits per user and deactivate keys, and the keys table shows last use and monthly usage per key" ], "weaknesses": [ "API and MCP access need a Business, Enterprise or API-only plan bought through sales. The FAQ says there's no API test without a subscription", "No public status page found. similarweb.statuspage.io redirects to a Statuspage login", "No public OpenAPI file or official SDK found. The FAQ answers the SDK question by saying any HTTP client works", "No backlink endpoint in the V5 or V4 API reference, although the website lists a Backlink Analytics product", "The SLA page is dated January 2016 and its linked PDF returns 404" ], "agentNotes": [ "Send the key in the `api-key` header. The capabilities endpoint documents `?api_key=` in the URL, which puts the secret in logs", "Stay under 10 requests a second. A 429 can also mean the monthly credit allowance is spent, so call `/capabilities` (free) before retrying", "Pass domains in lower case without `www.` or a path. The docs list 401 as data not found for a malformed domain", "Request only the metrics, countries and months needed. Credits multiply across domains, metrics, countries and periods, and daily granularity costs about 30 times monthly", "Website keywords accept monthly granularity for the last three months only, and `position` isn't returned for worldwide" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 46 } ], "editorialScores": { "ergonomics": 67, "maintenance": 33, "payments": 5, "reliability": 35, "schema": 63, "security": 52, "transparency": 45 }, "provenanceScore": 75 }, "connect": { "http": "curl -G \"https://api.similarweb.com/v5/website-analysis/websites/traffic-and-engagement\" \\\n -H \"api-key: $SIMILARWEB_API_KEY\" \\\n -d \"domain=nike.com\" -d \"metrics=visits,bounce_rate,pages_per_visit\" \\\n -d \"granularity=monthly\" -d \"start_date=2024-10-01\" -d \"end_date=2024-12-31\"", "config": { "mcpServers": { "similarweb-traffic-mcp": { "args": [ "-y", "mcp-remote@latest", "https://mcp.similarweb.com", "--header", "api-key:YOUR_API_KEY" ], "command": "npx" } } } }, "letme": { "capability": "https://letme.dev/seo.traffic", "tool": "https://letme.dev/similarweb" }, "area": "web-data", "provenance": { "legalEntity": "Similarweb Ltd.", "domain": "similarweb.com", "domainRegistered": "2008-04-10", "endpointOnVendorDomain": true, "terms": "https://www.similarweb.com/corp/legal/terms/", "privacy": "https://www.similarweb.com/corp/legal/privacy-policy/", "statusPage": "", "changelog": "https://docs.similarweb.com/changelog/similarweb/api-v5", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms (last updated 19 March 2025) name Similarweb Ltd., 121 Menachem Begin Road, Tel Aviv, as the contracting company and DMCA agent. The privacy policy (last amended 30 June 2026) lists Similarweb Ltd. (Israel), Similarweb Inc. (Delaware) and Similarweb UK Ltd. among group companies.", "The API answers at api.similarweb.com and the MCP server at mcp.similarweb.com, with OAuth at mcp-auth.similarweb.com.", "www.similarweb.com/.well-known/security.txt returns 404.", "similarweb.statuspage.io redirects to a Statuspage login, so no public status page is recorded.", "The V5 changelog page loads its entries in the browser and we couldn't read them. The older changelog at developers.similarweb.com/changelog is readable.", "https://www.similarweb.com/corp/legal/sla/ is dated January 2016 and links a PDF that returns 404.", "RDAP for similarweb.com gives a registration date of 2008-04-10." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/similarweb.json", "live": { "slug": "similarweb", "probe": { "target": "https://api.similarweb.com", "method": "get", "lastAt": "2026-10-10T03:53:43.900207484Z", "lastOk": true, "lastStatus": 404, "lastMs": 162, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 157, "p95ms24h": 261, "samples24h": 249, "samples30d": 383, "days": [ { "date": "2026-10-08", "probes": 93, "ok": 93 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "securityTxt": { "url": "https://similarweb.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:40:08.340964885Z" }, "llmsTxt": { "url": "https://docs.similarweb.com/api-v5/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-09T14:02:49.778732524Z" }, "pages": [ { "url": "https://docs.similarweb.com/changelog/similarweb/api-v5", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:38:18.405539332Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e3b0c44298fc" }, { "url": "https://www.similarweb.com/corp/legal/privacy-policy/", "kind": "privacy", "status": 304, "checkedAt": "2026-10-09T18:54:15.497050801Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f2801b59a37b" }, { "url": "https://www.similarweb.com/corp/legal/terms/", "kind": "terms", "status": 304, "checkedAt": "2026-10-09T18:54:17.740249307Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "1392028be0b0" } ], "updatedAt": "2026-10-10T03:53:43.900207484Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Majestic (Majestic-12 Limited)", "b": "Similarweb Ltd.", "name": "Vendor" }, { "a": "https://api.majestic.com", "b": "https://api.similarweb.com", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Paid", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Majestic's Terms and Conditions. The Python 3 connector on GitHub carries a BSD-style licence file", "b": "Proprietary service under Similarweb's terms of use", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "none", "b": "2026-09-24", "name": "Last release" }, { "a": "no date given", "b": "2025-03-19", "name": "Terms last updated" }, { "a": "2026-04-01", "b": "2026-06-30", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "3 stars", "b": "none", "name": "Popularity" } ], "faq": [ { "answer": "Similarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Majestic API or Similarweb?" }, { "answer": "Majestic API needs an API key. Similarweb takes an API key or an OAuth sign-in.", "question": "Do Majestic API and Similarweb need an API key?" }, { "answer": "Yes. Majestic API has a hosted endpoint at https://api.majestic.com and Similarweb at https://api.similarweb.com.", "question": "Can an agent call Majestic API and Similarweb without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Payments \u0026 pricing, 15 against 5" ], "also": null, "goodFor": "An agent that needs backlink, referring domain, anchor text and Trust Flow data in volume for an owner who already pays for the API plan.", "slug": "majestic", "watchFor": "Clause 14.1(f) of the supply terms forbids querying Majestic's database or servers with automated tools without prior permission. This matters before any probe is run" }, { "aheadOn": [ "Reliability, 35 against 17", "Schema \u0026 documentation, 63 against 44", "Agent ergonomics, 67 against 54", "Security \u0026 auth, 52 against 32", "Maintenance \u0026 community, 33 against 22", "Transparency \u0026 trust, 60 against 53" ], "also": null, "goodFor": "Traffic and engagement estimates, traffic channel mix and keyword click data for domains an agent doesn't own, with app, company and retail data on the same key.", "slug": "similarweb", "watchFor": "API and MCP access need a Business, Enterprise or API-only plan bought through sales. The FAQ says there's no API test without a subscription" } ], "job": { "capability": "seo.keywords", "name": "Keyword data" }, "others": [ { "json": "https://www.anchorterminal.com/compare/ahrefs-vs-majestic.json", "title": "Ahrefs vs Majestic API", "url": "https://www.anchorterminal.com/compare/ahrefs-vs-majestic" }, { "json": "https://www.anchorterminal.com/compare/ahrefs-vs-similarweb.json", "title": "Ahrefs vs Similarweb", "url": "https://www.anchorterminal.com/compare/ahrefs-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/dataforseo-vs-majestic.json", "title": "DataForSEO vs Majestic API", "url": "https://www.anchorterminal.com/compare/dataforseo-vs-majestic" }, { "json": "https://www.anchorterminal.com/compare/dataforseo-vs-similarweb.json", "title": "DataForSEO vs Similarweb", "url": "https://www.anchorterminal.com/compare/dataforseo-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/google-search-console-vs-majestic.json", "title": "Google Search Console API vs Majestic API", "url": "https://www.anchorterminal.com/compare/google-search-console-vs-majestic" }, { "json": "https://www.anchorterminal.com/compare/keywords-everywhere-vs-majestic.json", "title": "Keywords Everywhere API + MCP vs Majestic API", "url": "https://www.anchorterminal.com/compare/keywords-everywhere-vs-majestic" }, { "json": "https://www.anchorterminal.com/compare/keywords-everywhere-vs-similarweb.json", "title": "Keywords Everywhere API + MCP vs Similarweb", "url": "https://www.anchorterminal.com/compare/keywords-everywhere-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/manifold-mcp-vs-similarweb.json", "title": "Manifold vs Similarweb", "url": "https://www.anchorterminal.com/compare/manifold-mcp-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/moz-api-vs-similarweb.json", "title": "Moz API vs Similarweb", "url": "https://www.anchorterminal.com/compare/moz-api-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/se-ranking-vs-similarweb.json", "title": "SE Ranking API + MCP vs Similarweb", "url": "https://www.anchorterminal.com/compare/se-ranking-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/semrush-vs-similarweb.json", "title": "Semrush API + MCP vs Similarweb", "url": "https://www.anchorterminal.com/compare/semrush-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/google-search-console-vs-similarweb.json", "title": "Google Search Console API vs Similarweb", "url": "https://www.anchorterminal.com/compare/google-search-console-vs-similarweb" }, { "json": "https://www.anchorterminal.com/compare/majestic-vs-manifold-mcp.json", "title": "Majestic API vs Manifold", "url": "https://www.anchorterminal.com/compare/majestic-vs-manifold-mcp" }, { "json": "https://www.anchorterminal.com/compare/majestic-vs-moz-api.json", "title": "Majestic API vs Moz API", "url": "https://www.anchorterminal.com/compare/majestic-vs-moz-api" }, { "json": "https://www.anchorterminal.com/compare/majestic-vs-se-ranking.json", "title": "Majestic API vs SE Ranking API + MCP", "url": "https://www.anchorterminal.com/compare/majestic-vs-se-ranking" }, { "json": "https://www.anchorterminal.com/compare/majestic-vs-semrush.json", "title": "Majestic API vs Semrush API + MCP", "url": "https://www.anchorterminal.com/compare/majestic-vs-semrush" } ], "scores": [ { "by": 18, "edge": "similarweb", "key": "reliability", "majestic": 17, "name": "Reliability", "similarweb": 35, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 19, "edge": "similarweb", "key": "schema", "majestic": 44, "name": "Schema \u0026 documentation", "similarweb": 63, "weight": 13 }, { "by": 13, "edge": "similarweb", "key": "ergonomics", "majestic": 54, "name": "Agent ergonomics", "similarweb": 67, "weight": 13 }, { "by": 20, "edge": "similarweb", "key": "security", "majestic": 32, "name": "Security \u0026 auth", "similarweb": 52, "weight": 14 }, { "by": 10, "edge": "majestic", "key": "payments", "majestic": 15, "name": "Payments \u0026 pricing", "similarweb": 5, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 11, "edge": "similarweb", "key": "maintenance", "majestic": 22, "name": "Maintenance \u0026 community", "similarweb": 33, "weight": 7 }, { "by": 7, "edge": "similarweb", "key": "transparency", "majestic": 53, "name": "Transparency \u0026 trust", "similarweb": 60, "weight": 7 } ], "summary": "Similarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments \u0026 pricing. Both do keyword data.", "verdicts": { "majestic": "Each command's cost in units is published and a sandbox endpoint returns sample data without spending allowance. API access starts at $399.99 a month with no trial, and no OpenAPI file, status page, numeric rate limit, SLA or API changelog was found. The supply terms require permission before querying with automated tools.", "similarweb": "The V5 API returns traffic estimates, keyword clicks and SERP positions with selectable metrics, and the hosted MCP server accepts OAuth with a read scope. Access needs a Business, Enterprise or API-only subscription sold through sales, with no API trial, public price per credit or public status page found." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/majestic-vs-similarweb", "json": "https://www.anchorterminal.com/compare/majestic-vs-similarweb.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/majestic-vs-similarweb.md", "slim": "https://www.anchorterminal.com/compare/majestic-vs-similarweb.min.md" }, "markdown": "Similarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments \u0026 pricing. Both do keyword data.\n\n- Majestic API: grade F, 33.4/100, rank #937 of 950. Markdown https://www.anchorterminal.com/tools/majestic.md · JSON https://www.anchorterminal.com/api/v1/tools/majestic.json\n- Similarweb: grade D, 46/100, rank #858 of 950. Markdown https://www.anchorterminal.com/tools/similarweb.md · JSON https://www.anchorterminal.com/api/v1/tools/similarweb.json\n- Best SEO and search visibility data for AI agents: https://www.anchorterminal.com/best/seo/index.md\n- All 45 seo comparisons: https://www.anchorterminal.com/compare/seo/index.md\n\n## Which one, for what\n\n### Majestic API (F)\n\nGood for: An agent that needs backlink, referring domain, anchor text and Trust Flow data in volume for an owner who already pays for the API plan.\n\nAhead on:\n- Payments \u0026 pricing, 15 against 5\n\nWatch for: Clause 14.1(f) of the supply terms forbids querying Majestic's database or servers with automated tools without prior permission. This matters before any probe is run\n\n### Similarweb (D)\n\nGood for: Traffic and engagement estimates, traffic channel mix and keyword click data for domains an agent doesn't own, with app, company and retail data on the same key.\n\nAhead on:\n- Reliability, 35 against 17\n- Schema \u0026 documentation, 63 against 44\n- Agent ergonomics, 67 against 54\n- Security \u0026 auth, 52 against 32\n- Maintenance \u0026 community, 33 against 22\n- Transparency \u0026 trust, 60 against 53\n\nWatch for: API and MCP access need a Business, Enterprise or API-only plan bought through sales. The FAQ says there's no API test without a subscription\n\n\n## Score by category\n\n| Category | Weight | Majestic API | Similarweb | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 17 | 35 | Similarweb +18 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 44 | 63 | Similarweb +19 |\n| Agent ergonomics | 13% (16.2 this run) | 54 | 67 | Similarweb +13 |\n| Security \u0026 auth | 14% (17.5 this run) | 32 | 52 | Similarweb +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 15 | 5 | Majestic API +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 22 | 33 | Similarweb +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 53 | 60 | Similarweb +7 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **33.4 · F** | **46 · D** | |\n\n## Facts side by side\n\n| Fact | Majestic API | Similarweb |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Majestic (Majestic-12 Limited) | Similarweb Ltd. |\n| Hosted endpoint | `https://api.majestic.com` | `https://api.similarweb.com` |\n| Transports | HTTP | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Majestic's Terms and Conditions. The Python 3 connector on GitHub carries a BSD-style licence file | Proprietary service under Similarweb's terms of use |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | none | 2026-09-24 |\n| Terms last updated | no date given | 2025-03-19 |\n| Privacy policy last updated | 2026-04-01 | 2026-06-30 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 3 stars | none |\n\n## Verdicts\n\n**Majestic API.** Each command's cost in units is published and a sandbox endpoint returns sample data without spending allowance. API access starts at $399.99 a month with no trial, and no OpenAPI file, status page, numeric rate limit, SLA or API changelog was found. The supply terms require permission before querying with automated tools.\n\n**Similarweb.** The V5 API returns traffic estimates, keyword clicks and SERP positions with selectable metrics, and the hosted MCP server accepts OAuth with a read scope. Access needs a Business, Enterprise or API-only subscription sold through sales, with no API trial, public price per credit or public status page found.\n\n## Before you call either\n\n### Majestic API\n\n1. Send requests by HTTPS POST with `app_api_key` in the body. The docs show GET URLs for demonstration only and plain HTTP still works\n2. Always set `datasource=fresh` or `datasource=historic`. Without it the Historic Index is used when the plan includes it\n3. Call `GetSubscriptionInfo` (no cost) before a large pull. `GetBackLinkData` spends 5,000 analysis units a call plus one retrieval unit a row\n4. Read columns by header name, not position. The docs say column order can change between requests and Majestic may vary rows and columns at any time\n5. Develop against `https://developer.majestic.com/api/json`, which costs no units, then switch the host to `api.majestic.com`\n6. Ask the owner to confirm Majestic's permission for automated querying first. Clause 14.1(f) of the terms requires it\n\n### Similarweb\n\n1. Send the key in the `api-key` header. The capabilities endpoint documents `?api_key=` in the URL, which puts the secret in logs\n2. Stay under 10 requests a second. A 429 can also mean the monthly credit allowance is spent, so call `/capabilities` (free) before retrying\n3. Pass domains in lower case without `www.` or a path. The docs list 401 as data not found for a malformed domain\n4. Request only the metrics, countries and months needed. Credits multiply across domains, metrics, countries and periods, and daily granularity costs about 30 times monthly\n5. Website keywords accept monthly granularity for the last three months only, and `position` isn't returned for worldwide\n\n## Questions\n\n### Which is better for AI agents, Majestic API or Similarweb?\n\nSimilarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments \u0026 pricing.\n\n### Do Majestic API and Similarweb need an API key?\n\nMajestic API needs an API key. Similarweb takes an API key or an OAuth sign-in.\n\n### Can an agent call Majestic API and Similarweb without installing anything?\n\nYes. Majestic API has a hosted endpoint at https://api.majestic.com and Similarweb at https://api.similarweb.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/majestic-vs-similarweb.json, and with the fewest tokens: https://www.anchorterminal.com/compare/majestic-vs-similarweb.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"majestic\", \"b\": \"similarweb\"}`. From a terminal: `anchor compare majestic similarweb`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/majestic.json and https://www.anchorterminal.com/api/v1/tools/similarweb.json\n\n## Other comparisons with Majestic API or Similarweb\n\n- [Ahrefs vs Majestic API](https://www.anchorterminal.com/compare/ahrefs-vs-majestic.md)\n- [Ahrefs vs Similarweb](https://www.anchorterminal.com/compare/ahrefs-vs-similarweb.md)\n- [DataForSEO vs Majestic API](https://www.anchorterminal.com/compare/dataforseo-vs-majestic.md)\n- [DataForSEO vs Similarweb](https://www.anchorterminal.com/compare/dataforseo-vs-similarweb.md)\n- [Google Search Console API vs Majestic API](https://www.anchorterminal.com/compare/google-search-console-vs-majestic.md)\n- [Keywords Everywhere API + MCP vs Majestic API](https://www.anchorterminal.com/compare/keywords-everywhere-vs-majestic.md)\n- [Keywords Everywhere API + MCP vs Similarweb](https://www.anchorterminal.com/compare/keywords-everywhere-vs-similarweb.md)\n- [Manifold vs Similarweb](https://www.anchorterminal.com/compare/manifold-mcp-vs-similarweb.md)\n- [Moz API vs Similarweb](https://www.anchorterminal.com/compare/moz-api-vs-similarweb.md)\n- [SE Ranking API + MCP vs Similarweb](https://www.anchorterminal.com/compare/se-ranking-vs-similarweb.md)\n- [Semrush API + MCP vs Similarweb](https://www.anchorterminal.com/compare/semrush-vs-similarweb.md)\n- [Google Search Console API vs Similarweb](https://www.anchorterminal.com/compare/google-search-console-vs-similarweb.md)\n- [Majestic API vs Manifold](https://www.anchorterminal.com/compare/majestic-vs-manifold-mcp.md)\n- [Majestic API vs Moz API](https://www.anchorterminal.com/compare/majestic-vs-moz-api.md)\n- [Majestic API vs SE Ranking API + MCP](https://www.anchorterminal.com/compare/majestic-vs-se-ranking.md)\n- [Majestic API vs Semrush API + MCP](https://www.anchorterminal.com/compare/majestic-vs-semrush.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Majestic API vs Similarweb", "url": "" } ], "description": "Similarweb scores 46 (D) to Majestic's 33.4 (F) for keyword data. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Majestic API F 33.4", "Similarweb D 46", "scores" ], "h1": "Majestic API vs Similarweb", "image": "https://www.anchorterminal.com/assets/og/compare-majestic-vs-similarweb.png", "path": "/compare/majestic-vs-similarweb", "published": "2026-10-01", "section": "tools", "title": "Majestic vs Similarweb for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/majestic-vs-similarweb" }, "tokens": { "markdown": 2350, "slim": 630 }, "version": 1 }