{ "data": { "a": { "slug": "semrush", "name": "Semrush API + MCP", "vendor": "Semrush Inc. (an Adobe company)", "vendorUrl": "https://www.semrush.com", "kind": "http-api", "category": "seo", "summary": "Semrush is a search marketing data platform, owned by Adobe since April 2026. Agents reach its keyword, backlink, ranking and traffic data through REST APIs with API keys or a hosted MCP server that spends the same API units.", "url": "https://www.anchorterminal.com/tools/semrush", "markdownUrl": "https://www.anchorterminal.com/tools/semrush.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/semrush.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/semrush.json", "license": "Proprietary service under the Semrush terms of service", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.semrush.com", "packages": [], "auth": "mixed", "authNotes": "Version 4 methods take an API key in `Authorization: Apikey \u003ckey\u003e`, created in the profile with a read-only or read and write permission and an optional expiry. Version 3 methods take the account's single key as the `key` query parameter. The MCP server signs in by OAuth 2.1 against the user's Semrush account, or takes the API key header. Access is self-serve for a paying account, with no app review. Trends Premium and custom plans go through sales.", "pricing": "paid", "pricingNotes": "Every API needs a paid subscription, and calls spend API units. The Standard API needs the SEO Business plan plus a unit package of 2 to 20 million units, whose prices aren't on a public page. The MCP page says Semrush One Starter and Pro+ and SEO Classic Pro and Guru include 50,000 units. Our request saw plan prices in pounds, from £113 a month for SEO to £444 for Advanced. The free plan (no card, 10 reports a day) has no API units, and the 7-day trial's card requirement wasn't checked.", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs, the MCP page or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 14, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://developer.semrush.com/api/", "llmsTxt": "https://developer.semrush.com/api/llms.txt", "capabilities": [ "seo.keywords", "seo.backlinks", "seo.rankings", "seo.traffic", "seo.serp" ], "tags": [ "official", "hosted", "mcp", "oauth", "api-key", "llms-txt", "closed-source", "subscription", "usage-units", "bug-bounty", "adobe" ], "lastRelease": "2026-09-04", "graded": true, "anchor": { "graded": true, "score": 53.1, "grade": "D", "agentReady": false, "rank": 487, "ranked": true, "rankOf": 629, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 77, "maintenance": 57, "payments": 17, "reliability": 34, "schema": 70, "security": 54, "transparency": 67 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "The hosted MCP server exposes 14 tools that load a report's parameters on demand, and version 4 API keys can be read-only, time-limited and revoked. Most reports still sit in version 3, whose single key travels in the URL and can't be revoked. No status page, OpenAPI file or API unit price was found.", "bestFor": "Teams already paying for Semrush who want an agent to pull keyword, backlink, ranking and traffic estimates in one place, mainly through the MCP server.", "strengths": [ "Hosted MCP server at mcp.semrush.com/v2/mcp with OAuth 2.1, dynamic client registration and 14 named tools, limited to reads", "Version 4 keys can be read-only or read and write, carry an expiry, and be revoked. An account can hold up to 100", "Every method page states its cost in API units, and `limit`, `fields` and `filter` cap what a call spends", "llms.txt indexes for the developer site and for each API version, with dated release notes since March 2026", "API Query log records time, IP address, report type and units spent for SEO API and Projects v4 calls, with CSV export" ], "weaknesses": [ "Domain, URL, Trends, Position Tracking and Site Audit reports are version 3 only, where the one key is a URL parameter and can't be revoked", "Version 4 Keyword and Backlinks reports are labelled Early Access, with endpoints, formats and pricing subject to change", "No public status page, SLA terms, OpenAPI file or official SDK found in the reviewed pages", "API unit package prices aren't published, and every API needs a paid subscription", "When units run short, per-line SEO and Trends reports return fewer lines instead of an error" ], "agentNotes": [ "Use the MCP server at https://mcp.semrush.com/v2/mcp where the host supports it. Call a discovery tool, then `get_report_schema`, then `execute_report`", "Set `limit` or `display_limit` on every per-line report. A backlinks row costs 40 to 45 units and a historical keyword row 50", "Check the unit balance before large pulls. A per-line report returns only the lines the balance covers, with no error", "Send the version 4 key as `Authorization: Apikey \u003ckey\u003e`, never as `?key=`. Version 3 accepts only the query parameter, so keep those URLs out of logs", "Stay under 10 requests a second and 10 concurrent requests per account, and retry only when `error.retryable` is true" ], "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": 53.1 } ], "editorialScores": { "ergonomics": 77, "maintenance": 57, "payments": 17, "reliability": 34, "schema": 70, "security": 54, "transparency": 59 }, "provenanceScore": 75 }, "connect": { "http": "curl -H 'Authorization: Apikey YOUR_API_KEY' \"https://api.semrush.com/apis/v4/keywords/v1/metrics?keyword=seo%20tools\u0026country=US\"", "claudeCode": "claude mcp add semrush https://mcp.semrush.com/v2/mcp -t http", "config": { "mcpServers": { "semrush": { "url": "https://mcp.semrush.com/v2/mcp" } } } }, "letme": { "capability": "https://letme.dev/seo.keywords", "tool": "https://letme.dev/semrush" }, "area": "web-data", "provenance": { "legalEntity": "Semrush Inc.", "domain": "semrush.com", "domainRegistered": "2008-10-03", "endpointOnVendorDomain": true, "terms": "https://www.semrush.com/company/legal/terms-of-service/", "privacy": "https://www.semrush.com/company/legal/privacy-policy/", "statusPage": "", "changelog": "https://developer.semrush.com/api/v4/introduction/release-notes/", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (last updated 25 August 2026) name Semrush Inc., a Delaware corporation at 800 Boylston Street, Suite 2475, Boston, MA 02199. The site footer reads © 2026 Semrush Holdings and carries an Adobe logo.", "Adobe announced completion of its acquisition of Semrush Holdings, Inc. on 28 April 2026, in a press release on semrush.com. The terms and the privacy policy (last modified 13 October 2025) don't mention Adobe.", "The APIs answer at api.semrush.com and the MCP server at mcp.semrush.com, with OAuth metadata pointing to oauth.semrush.com and api.semrush.com.", "www.semrush.com/.well-known/security.txt returns 404. The security page gives security@semrush.com and links to a HackerOne programme.", "No status page is linked from the developer docs, the home page or the security page. status.semrush.com doesn't resolve in DNS.", "RDAP for semrush.com gives a registration date of 2008-10-03 and MarkMonitor Inc. as registrar." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/semrush.json", "live": { "slug": "semrush", "probe": { "target": "https://api.semrush.com", "method": "get", "lastAt": "2026-10-08T18:20:39.850276067Z", "lastOk": true, "lastStatus": 400, "lastMs": 139, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 133, "p95ms24h": 189, "samples24h": 33, "samples30d": 33, "days": [ { "date": "2026-10-08", "probes": 33, "ok": 33 } ] }, "securityTxt": { "url": "https://semrush.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:39:05.730669338Z" }, "pages": [ { "url": "https://developer.semrush.com/api/v4/introduction/release-notes/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:17:17.791899201Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "8ec987932bb2" } ], "updatedAt": "2026-10-08T18:20:39.850276067Z" } }, "answer": "Semrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories.", "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": 566, "ranked": true, "rankOf": 629, "categoryRank": 5, "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": "2026-10-08T18:20:40.102205167Z", "lastOk": true, "lastStatus": 404, "lastMs": 103, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 154, "p95ms24h": 275, "samples24h": 33, "samples30d": 33, "days": [ { "date": "2026-10-08", "probes": 33, "ok": 33 } ] }, "securityTxt": { "url": "https://similarweb.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:39:03.862346608Z" }, "pages": [ { "url": "https://docs.similarweb.com/changelog/similarweb/api-v5", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:19:26.596610692Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e3b0c44298fc" } ], "updatedAt": "2026-10-08T18:20:40.102205167Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Semrush Inc. (an Adobe company)", "b": "Similarweb Ltd.", "name": "Vendor" }, { "a": "https://api.semrush.com", "b": "https://api.similarweb.com", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Paid", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under the Semrush terms of service", "b": "Proprietary service under Similarweb's terms of use", "name": "Licence" }, { "a": "14", "b": "none", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-04", "b": "2026-09-24", "name": "Last release" }, { "a": "2026-08-25", "b": "2025-03-19", "name": "Terms last updated" }, { "a": "2025-10-13", "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": "yes", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" } ], "faq": [ { "answer": "Semrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, Semrush API + MCP or Similarweb?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Semrush API + MCP and Similarweb need an API key?" }, { "answer": "Yes. Semrush API + MCP has a hosted endpoint at https://api.semrush.com and Similarweb at https://api.similarweb.com.", "question": "Can an agent call Semrush API + MCP and Similarweb without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 70 against 63", "Agent ergonomics, 77 against 67", "Payments \u0026 pricing, 17 against 5", "Maintenance \u0026 community, 57 against 33", "Transparency \u0026 trust, 67 against 60" ], "also": null, "goodFor": "Teams already paying for Semrush who want an agent to pull keyword, backlink, ranking and traffic estimates in one place, mainly through the MCP server.", "slug": "semrush", "watchFor": "Domain, URL, Trends, Position Tracking and Site Audit reports are version 3 only, where the one key is a URL parameter and can't be revoked" }, { "aheadOn": null, "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": "Seo keywords" }, "others": [ { "json": "https://www.anchorterminal.com/compare/ahrefs-vs-semrush.json", "title": "Ahrefs vs Semrush API + MCP", "url": "https://www.anchorterminal.com/compare/ahrefs-vs-semrush" }, { "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-semrush.json", "title": "DataForSEO vs Semrush API + MCP", "url": "https://www.anchorterminal.com/compare/dataforseo-vs-semrush" }, { "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/manifold-mcp-vs-semrush.json", "title": "Manifold vs Semrush API + MCP", "url": "https://www.anchorterminal.com/compare/manifold-mcp-vs-semrush" }, { "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-semrush.json", "title": "Moz API vs Semrush API + MCP", "url": "https://www.anchorterminal.com/compare/moz-api-vs-semrush" }, { "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" } ], "scores": [ { "by": 1, "edge": "similarweb", "key": "reliability", "name": "Reliability", "semrush": 34, "similarweb": 35, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 7, "edge": "semrush", "key": "schema", "name": "Schema \u0026 documentation", "semrush": 70, "similarweb": 63, "weight": 13 }, { "by": 10, "edge": "semrush", "key": "ergonomics", "name": "Agent ergonomics", "semrush": 77, "similarweb": 67, "weight": 13 }, { "by": 2, "edge": "semrush", "key": "security", "name": "Security \u0026 auth", "semrush": 54, "similarweb": 52, "weight": 14 }, { "by": 12, "edge": "semrush", "key": "payments", "name": "Payments \u0026 pricing", "semrush": 17, "similarweb": 5, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 24, "edge": "semrush", "key": "maintenance", "name": "Maintenance \u0026 community", "semrush": 57, "similarweb": 33, "weight": 7 }, { "by": 7, "edge": "semrush", "key": "transparency", "name": "Transparency \u0026 trust", "semrush": 67, "similarweb": 60, "weight": 7 } ], "summary": "Semrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories. Both do seo keywords.", "verdicts": { "semrush": "The hosted MCP server exposes 14 tools that load a report's parameters on demand, and version 4 API keys can be read-only, time-limited and revoked. Most reports still sit in version 3, whose single key travels in the URL and can't be revoked. No status page, OpenAPI file or API unit price was found.", "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/semrush-vs-similarweb", "json": "https://www.anchorterminal.com/compare/semrush-vs-similarweb.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/semrush-vs-similarweb.md", "slim": "https://www.anchorterminal.com/compare/semrush-vs-similarweb.min.md" }, "markdown": "Semrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories. Both do seo keywords.\n\n- Semrush API + MCP: grade D, 53.1/100, rank #487 of 629. Markdown https://www.anchorterminal.com/tools/semrush.md · JSON https://www.anchorterminal.com/api/v1/tools/semrush.json\n- Similarweb: grade D, 46/100, rank #566 of 629. Markdown https://www.anchorterminal.com/tools/similarweb.md · JSON https://www.anchorterminal.com/api/v1/tools/similarweb.json\n\n## Which one, for what\n\n### Semrush API + MCP (D)\n\nGood for: Teams already paying for Semrush who want an agent to pull keyword, backlink, ranking and traffic estimates in one place, mainly through the MCP server.\n\nAhead on:\n- Schema \u0026 documentation, 70 against 63\n- Agent ergonomics, 77 against 67\n- Payments \u0026 pricing, 17 against 5\n- Maintenance \u0026 community, 57 against 33\n- Transparency \u0026 trust, 67 against 60\n\nWatch for: Domain, URL, Trends, Position Tracking and Site Audit reports are version 3 only, where the one key is a URL parameter and can't be revoked\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\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 | Semrush API + MCP | Similarweb | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 34 | 35 | Similarweb +1 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 70 | 63 | Semrush API + MCP +7 |\n| Agent ergonomics | 13% (16.2 this run) | 77 | 67 | Semrush API + MCP +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 54 | 52 | Semrush API + MCP +2 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 17 | 5 | Semrush API + MCP +12 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 57 | 33 | Semrush API + MCP +24 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 67 | 60 | Semrush API + MCP +7 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **53.1 · D** | **46 · D** | |\n\n## Facts side by side\n\n| Fact | Semrush API + MCP | Similarweb |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Semrush Inc. (an Adobe company) | Similarweb Ltd. |\n| Hosted endpoint | `https://api.semrush.com` | `https://api.similarweb.com` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under the Semrush terms of service | Proprietary service under Similarweb's terms of use |\n| Tools exposed | 14 | none |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-04 | 2026-09-24 |\n| Terms last updated | 2026-08-25 | 2025-03-19 |\n| Privacy policy last updated | 2025-10-13 | 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 | yes | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n\n## Verdicts\n\n**Semrush API + MCP.** The hosted MCP server exposes 14 tools that load a report's parameters on demand, and version 4 API keys can be read-only, time-limited and revoked. Most reports still sit in version 3, whose single key travels in the URL and can't be revoked. No status page, OpenAPI file or API unit price was found.\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### Semrush API + MCP\n\n1. Use the MCP server at https://mcp.semrush.com/v2/mcp where the host supports it. Call a discovery tool, then `get_report_schema`, then `execute_report`\n2. Set `limit` or `display_limit` on every per-line report. A backlinks row costs 40 to 45 units and a historical keyword row 50\n3. Check the unit balance before large pulls. A per-line report returns only the lines the balance covers, with no error\n4. Send the version 4 key as `Authorization: Apikey \u003ckey\u003e`, never as `?key=`. Version 3 accepts only the query parameter, so keep those URLs out of logs\n5. Stay under 10 requests a second and 10 concurrent requests per account, and retry only when `error.retryable` is true\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, Semrush API + MCP or Similarweb?\n\nSemrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories.\n\n### Do Semrush API + MCP and Similarweb need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Semrush API + MCP and Similarweb without installing anything?\n\nYes. Semrush API + MCP has a hosted endpoint at https://api.semrush.com and Similarweb at https://api.similarweb.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/semrush-vs-similarweb.json, and with the fewest tokens: https://www.anchorterminal.com/compare/semrush-vs-similarweb.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"semrush\", \"b\": \"similarweb\"}`. From a terminal: `anchor compare semrush similarweb`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/semrush.json and https://www.anchorterminal.com/api/v1/tools/similarweb.json\n\n## Other comparisons with Semrush API + MCP or Similarweb\n\n- [Ahrefs vs Semrush API + MCP](https://www.anchorterminal.com/compare/ahrefs-vs-semrush.md)\n- [Ahrefs vs Similarweb](https://www.anchorterminal.com/compare/ahrefs-vs-similarweb.md)\n- [DataForSEO vs Semrush API + MCP](https://www.anchorterminal.com/compare/dataforseo-vs-semrush.md)\n- [DataForSEO vs Similarweb](https://www.anchorterminal.com/compare/dataforseo-vs-similarweb.md)\n- [Manifold vs Semrush API + MCP](https://www.anchorterminal.com/compare/manifold-mcp-vs-semrush.md)\n- [Manifold vs Similarweb](https://www.anchorterminal.com/compare/manifold-mcp-vs-similarweb.md)\n- [Moz API vs Semrush API + MCP](https://www.anchorterminal.com/compare/moz-api-vs-semrush.md)\n- [Moz API vs Similarweb](https://www.anchorterminal.com/compare/moz-api-vs-similarweb.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "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": "Semrush API + MCP vs Similarweb", "url": "" } ], "description": "Semrush API + MCP scores 53.1 (D) on agent readiness against Similarweb's 46 (D), and leads in 6 of 7 scored categories. Both do seo keywords. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Semrush API + MCP D 53.1", "Similarweb D 46", "scores" ], "h1": "Semrush API + MCP vs Similarweb", "image": "https://www.anchorterminal.com/assets/og/compare-semrush-vs-similarweb.png", "path": "/compare/semrush-vs-similarweb", "published": "2026-10-01", "section": "tools", "title": "Semrush API + MCP vs Similarweb for AI agents, D 53.1 vs D 46", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/semrush-vs-similarweb" }, "tokens": { "markdown": 2000, "slim": 630 }, "version": 1 }