{
  "data": {
    "a": {
      "slug": "visual-crossing",
      "name": "Visual Crossing Weather API",
      "vendor": "Visual Crossing",
      "vendorUrl": "https://www.visualcrossing.com",
      "kind": "http-api",
      "category": "weather",
      "summary": "Weather API for historical conditions, forecasts and climate data by location and date range.",
      "url": "https://www.anchorterminal.com/tools/visual-crossing",
      "markdownUrl": "https://www.anchorterminal.com/tools/visual-crossing.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/visual-crossing.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/visual-crossing.json",
      "repo": "https://github.com/visualcrossing/WeatherApi",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline",
      "packages": [],
      "auth": "api-key",
      "authNotes": "The Timeline API takes the key as the key query parameter. The MCP server takes it in an X-VC-API-Key header, or OAuth (user or machine-to-machine) once Visual Crossing has provisioned it for the account.",
      "pricing": "freemium",
      "pricingNotes": "Billed in records. A day of daily data is one record, a day of hourly data is 24, and a full 15-day forecast for one location is one record. Free at 1,000 records a day (30,000 a month), no card, one concurrent request, attribution required. Metered at $0.0001 a record above the free 1,000 a day, unlimited records, up to 25,000 records a query. Professional (10 million records a month) shows no price, and Corporate and Enterprise are contact sales. A February 2023 post put Professional and Corporate at $35 and $150 a month. The plan table lists 99.5 per cent uptime on Free and 99.9 on paid plans (https://www.visualcrossing.com/weather-data-pricing/ and https://www.visualcrossing.com/resources/blog/what-will-my-weather-data-cost/).",
      "priceSummary": "$0.10 / 1k req",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 1,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.visualcrossing.com/resources/documentation/weather-api/timeline-weather-api/",
      "llmsTxt": "https://www.visualcrossing.com/llms.txt",
      "openapi": "https://www.visualcrossing.com/weather/specs/visualcrossing-weather-api-openapi.json",
      "capabilities": [
        "weather.current",
        "weather.forecast",
        "weather.historical",
        "weather.alerts",
        "data.weather"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "no-card",
        "mcp",
        "closed-source",
        "usage-priced"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 60.3,
        "grade": "C",
        "agentReady": false,
        "rank": 251,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 4,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 78,
          "maintenance": 58,
          "payments": 40,
          "reliability": 66,
          "schema": 74,
          "security": 40,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "History from 1970, current conditions and a 15-day forecast from one endpoint. Key only in the query string on the REST API.",
        "strengths": [
          "History from 1970, current conditions and a 15-day forecast from one endpoint",
          "$0.0001 a record with 1,000 free a day and no card",
          "Official MCP server with one tool, key in a header or OAuth",
          "llms.txt, an OpenAPI spec and a quarterly changelog, most recently 4 September 2026",
          "Status page and published uptime targets of 99.5 per cent free and 99.9 paid"
        ],
        "weaknesses": [
          "Key only in the query string on the REST API",
          "OpenAPI spec defines no enums and no error responses",
          "Privacy policy states no retention periods or subprocessors",
          "Storing results needs the right licence level, and the terms carry a non-compete",
          "No security.txt, disclosure policy or MCP registry entry"
        ],
        "agentNotes": [
          "Always pass include= and elements=. A bare call returns days, hours and current for every element and burns records",
          "Count records before a backfill. Hourly data is 24 records a day, so a year for one place is 8,760",
          "Pass unitGroup=metric. The default is US units",
          "Use the MCP server with X-VC-API-Key rather than pasting the key into a URL",
          "Keep to one request at a time on Free and Professional. A second concurrent job returns 429"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 60.3
          }
        ],
        "editorialScores": {
          "ergonomics": 78,
          "maintenance": 58,
          "payments": 40,
          "reliability": 66,
          "schema": 74,
          "security": 40,
          "transparency": 31
        },
        "provenanceScore": 90,
        "dataQualityScore": 77
      },
      "connect": {
        "http": "curl \"https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/51.51,-0.13/2026-09-01/2026-09-07?unitGroup=metric\u0026include=days\u0026elements=datetime,tempmax,tempmin,precip\u0026contentType=json\u0026key=$VISUALCROSSING_API_KEY\"",
        "claudeCode": "claude mcp add --transport http visualcrossing https://mcp.visualcrossing.com/VisualCrossingWebServices/rest/api/v1/mcp --header \"X-VC-API-Key: $VISUALCROSSING_API_KEY\"",
        "config": {
          "mcpServers": {
            "visualcrossing": {
              "headers": {
                "X-VC-API-Key": "${VISUALCROSSING_API_KEY}"
              },
              "type": "http",
              "url": "https://mcp.visualcrossing.com/VisualCrossingWebServices/rest/api/v1/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/weather.current",
        "tool": "https://letme.dev/visual-crossing"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Metered record",
          "unit": "record",
          "usd": 0.0001,
          "note": "First 1,000 records a day free"
        },
        {
          "item": "Metered, 15-day forecast calls",
          "unit": "1k-requests",
          "usd": 0.1,
          "note": "One record a forecast call, $0.0001 each"
        }
      ],
      "provenance": {
        "legalEntity": "Visual Crossing Corporation",
        "domain": "visualcrossing.com",
        "domainRegistered": "2005-10-11",
        "endpointOnVendorDomain": true,
        "terms": "https://www.visualcrossing.com/weather-services-terms/",
        "privacy": "https://www.visualcrossing.com/privacy/",
        "statusPage": "https://status.visualcrossing.com/",
        "changelog": "https://www.visualcrossing.com/resources/documentation/weather-api/weather-api-changelog/",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "The terms (last updated January 2023) name Visual Crossing Corporation under Virginia law but give no address.",
          "The privacy policy is at /privacy/ (updated 23 May 2025). The /privacy-policy/ path returns 404.",
          "The status page at status.visualcrossing.com runs on UptimeRobot.",
          "/.well-known/security.txt returns 404 per the 30 September check.",
          "The GitHub repository holds sample code in several languages, not an SDK."
        ],
        "score": 90
      },
      "dataQuality": {
        "coverage": "Global, any address or coordinate, up to 100 locations a query on Professional",
        "coverageRating": 4,
        "freshness": "Stations update every 15 to 30 minutes or hourly per the product page. Forecast refresh cadence not stated",
        "freshnessClass": "hourly",
        "history": "From 1970-01-01, hourly and daily, plus archived forecasts through the Historical Weather Forecast API added in Q2 2026",
        "historyYears": 56,
        "methodology": "https://www.visualcrossing.com/resources/documentation/weather-api/timeline-weather-api/",
        "sourcesDisclosed": true,
        "licence": "Proprietary. Storage by licence level, no resale, non-compete",
        "licenceClass": "clear",
        "standing": "",
        "standingClass": "none",
        "reuse": "Results may be stored in a database only where the licence level permits it, except for personal use. Resale and redistribution are barred, using the data to replicate a Visual Crossing service is barred, and Enterprise is the plan that adds external data-sharing rights.",
        "score": 77,
        "checks": null
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/visual-crossing.json",
      "live": {
        "slug": "visual-crossing",
        "probe": {
          "target": "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline",
          "method": "get",
          "lastAt": "2026-10-05T03:17:34.834947278Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 259,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 256,
          "p95ms24h": 295,
          "samples24h": 273,
          "samples30d": 938,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.visualcrossing.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:33.384039028Z"
        },
        "githubStars": 55,
        "securityTxt": {
          "url": "https://visualcrossing.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:36.837103071Z"
        },
        "llmsTxt": {
          "url": "https://www.visualcrossing.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:21.271479326Z"
        },
        "domain": {
          "domain": "visualcrossing.com",
          "registered": "2005-10-11",
          "source": "https://rdap.verisign.com/com/v1/domain/visualcrossing.com",
          "checkedAt": "2026-10-04T13:06:40.738574234Z"
        },
        "pages": [
          {
            "url": "https://www.visualcrossing.com/resources/documentation/weather-api/weather-api-changelog/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:47.418150983Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "77ecfd35a643"
          },
          {
            "url": "https://www.visualcrossing.com/weather-data-pricing/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:49.331082427Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "cb8af14c5632"
          },
          {
            "url": "https://www.visualcrossing.com/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:45.228070626Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "0ccd098bba16"
          },
          {
            "url": "https://www.visualcrossing.com/weather-services-terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:51.357308005Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "5225b6169954"
          }
        ],
        "updatedAt": "2026-10-05T03:17:34.834947278Z"
      }
    },
    "b": {
      "slug": "weatherapi-com",
      "name": "WeatherAPI.com",
      "vendor": "WeatherAPI.com (Zoomash Ltd)",
      "vendorUrl": "https://www.weatherapi.com",
      "kind": "http-api",
      "category": "weather",
      "summary": "Weather API for current conditions, forecasts, history, marine data, alerts and air quality, queried by location.",
      "url": "https://www.anchorterminal.com/tools/weatherapi-com",
      "markdownUrl": "https://www.anchorterminal.com/tools/weatherapi-com.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/weatherapi-com.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.weatherapi.com/v1",
      "packages": [],
      "auth": "api-key",
      "authNotes": "The key goes in the key query parameter on every request. The terms tie one key to one application.",
      "pricing": "freemium",
      "pricingNotes": "Free at 100,000 calls a month with a 3-day forecast and 1 day of history, no card. Starter $7 a month ($75 a year) for 3 million calls, 7-day forecast and 7 days of history. Pro+ $25 ($270 a year) for 5 million calls, 14-day forecast, 365 days of history, marine with tides and bulk requests. Business $65 ($702 a year) for 10 million calls, history back to 2010-01-01 and 99.9 per cent uptime. Enterprise on request with unlimited calls. Paid plans start with a 14-day free trial (https://www.weatherapi.com/pricing.aspx).",
      "priceSummary": "$7 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.weatherapi.com/docs/",
      "llmsTxt": "https://www.weatherapi.com/llms.txt",
      "openapi": "https://www.weatherapi.com/openapi.json",
      "capabilities": [
        "weather.current",
        "weather.forecast",
        "weather.historical",
        "weather.alerts",
        "weather.marine",
        "data.weather"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "no-card",
        "closed-source",
        "uk"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 65.8,
        "grade": "B",
        "agentReady": false,
        "rank": 169,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 45,
          "payments": 30,
          "reliability": 90,
          "schema": 89,
          "security": 37,
          "transparency": 70
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "3 million calls for $7 a month, and 100,000 a month free with no card. Key only in the query string, and no security.txt.",
        "strengths": [
          "3 million calls for $7 a month, and 100,000 a month free with no card",
          "OpenAPI 3.1 spec with structured errors, plus llms.txt",
          "Field filters (current_fields, day_fields, hour_fields) to trim responses",
          "Status page with no incidents listed, and 99.9 per cent with service credits for High Volume customers",
          "12 months' written notice before an API deprecation, in the terms"
        ],
        "weaknesses": [
          "Key only in the query string, and no security.txt",
          "Privacy policy undated, with template placeholders and transfers to Russia and China",
          "SDKs for Node.js, Java, PHP and Go untouched since 2020 and 2021",
          "No full list of data sources or models",
          "Caching limited to 60 minutes for current and 24 hours for forecast"
        ],
        "agentNotes": [
          "Pass current_fields, day_fields or hour_fields to cut the response to what you need",
          "Treat a 403 with error code 2007 as the monthly quota, not a bad key. There's no 429",
          "Reuse the id from search.json (q=id:NNN) to avoid ambiguous city names",
          "Cache history freely, current for under an hour and forecasts for under a day, to stay inside the terms",
          "Use https://api.weatherapi.com/v1. The docs still show an http:// base URL"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 65.8
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 45,
          "payments": 30,
          "reliability": 90,
          "schema": 89,
          "security": 37,
          "transparency": 49
        },
        "provenanceScore": 90,
        "dataQualityScore": 49
      },
      "connect": {
        "http": "curl \"https://api.weatherapi.com/v1/forecast.json?key=$WEATHERAPI_KEY\u0026q=51.51,-0.13\u0026days=3\u0026aqi=no\u0026alerts=no\""
      },
      "letme": {
        "capability": "https://letme.dev/weather.current",
        "tool": "https://letme.dev/weatherapi-com"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Starter plan",
          "unit": "month",
          "usd": 7,
          "note": "3 million calls, $75 a year"
        },
        {
          "item": "Pro+ plan",
          "unit": "month",
          "usd": 25,
          "note": "5 million calls, $270 a year"
        },
        {
          "item": "Business plan",
          "unit": "month",
          "usd": 65,
          "note": "10 million calls, $702 a year"
        },
        {
          "item": "Call on Starter, at the plan cap",
          "unit": "1k-requests",
          "usd": 0.0023,
          "note": "$7 over 3 million calls"
        },
        {
          "item": "Call on Business, at the plan cap",
          "unit": "1k-requests",
          "usd": 0.0065,
          "note": "$65 over 10 million calls"
        }
      ],
      "provenance": {
        "legalEntity": "Zoomash Ltd",
        "domain": "weatherapi.com",
        "domainRegistered": "2014-11-29",
        "endpointOnVendorDomain": true,
        "terms": "https://www.weatherapi.com/terms.aspx",
        "privacy": "https://www.weatherapi.com/privacy.aspx",
        "statusPage": "https://status.weatherapi.com/",
        "changelog": "https://www.weatherapi.com/api-changelog.html",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "The terms name Zoomash Ltd under the law of England and Wales but give no registered address or company number, and the privacy policy names no entity beyond WeatherAPI.com.",
          "The privacy policy says personal data may be transferred to the USA, Russia, Japan, China and India, and names Stripe for payments.",
          "The status page at status.weatherapi.com runs on Better Stack.",
          "www.weatherapi.com/.well-known/security.txt returns an HTML error page per the 30 September check."
        ],
        "score": 90
      },
      "dataQuality": {
        "coverage": "Global, any coordinate, city, postcode or IP",
        "coverageRating": 4,
        "freshness": "Not stated. The terms allow current conditions to be cached for 60 minutes",
        "freshnessClass": "hourly",
        "history": "From 2010-01-01 on Business, 365 days on Pro+",
        "historyYears": 16,
        "methodology": "",
        "sourcesDisclosed": false,
        "licence": "Proprietary. Cache limits, no resale, attribution on Free",
        "licenceClass": "clear",
        "standing": "",
        "standingClass": "none",
        "reuse": "The terms cap caching at 60 minutes for current and 24 hours for forecast, forbid selling the data on, and end any right to keep it when the subscription ends. Showing it in your own app or service is allowed.",
        "score": 49,
        "checks": null
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/weatherapi-com.json",
      "live": {
        "slug": "weatherapi-com",
        "probe": {
          "target": "https://api.weatherapi.com/v1",
          "method": "get",
          "lastAt": "2026-10-05T03:17:35.196918548Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 73,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 60,
          "p95ms24h": 150,
          "samples24h": 273,
          "samples30d": 938,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.weatherapi.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:34.084084756Z"
        },
        "securityTxt": {
          "url": "https://weatherapi.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:50.54150115Z"
        },
        "llmsTxt": {
          "url": "https://www.weatherapi.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:21.6959677Z"
        },
        "domain": {
          "domain": "weatherapi.com",
          "registered": "2014-11-29",
          "source": "https://rdap.verisign.com/com/v1/domain/weatherapi.com",
          "checkedAt": "2026-10-04T13:06:50.954163408Z"
        },
        "pages": [
          {
            "url": "https://www.weatherapi.com/api-changelog.html",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:53.355500992Z",
            "changedAt": "2026-10-04T15:52:53.355500992Z",
            "fingerprint": "27443ff20814"
          },
          {
            "url": "https://www.weatherapi.com/pricing.aspx",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:55.401668105Z",
            "changedAt": "2026-10-04T15:52:55.401668105Z",
            "fingerprint": "edf5a49404e3"
          },
          {
            "url": "https://www.weatherapi.com/privacy.aspx",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:57.435167177Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "cb9e4a437682"
          },
          {
            "url": "https://www.weatherapi.com/terms.aspx",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:59.433233246Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "29affc48ca13"
          }
        ],
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  "markdown": "WeatherAPI.com has a score of 65.8 (B) against Visual Crossing Weather API's 60.3 (C). Both do weather current. The largest gap is reliability, 24 points.\n\n- Visual Crossing Weather API: grade C, 60.3/100, rank #251 of 452. Markdown https://www.anchorterminal.com/tools/visual-crossing.md · JSON https://www.anchorterminal.com/api/v1/tools/visual-crossing.json\n- WeatherAPI.com: grade B, 65.8/100, rank #169 of 452. Markdown https://www.anchorterminal.com/tools/weatherapi-com.md · JSON https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json\n\n## Which one, for what\n\nPick Visual Crossing Weather API for payments \u0026 pricing (+10), maintenance \u0026 community (+13).\n\nPick WeatherAPI.com for reliability (+24), schema \u0026 documentation (+15), transparency \u0026 trust (+9).\n\n## Score by category\n\n| Category | Weight | Visual Crossing Weather API | WeatherAPI.com | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 66 | 90 | WeatherAPI.com +24 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 74 | 89 | WeatherAPI.com +15 |\n| Agent ergonomics | 13% (16.2 this run) | 78 | 80 | WeatherAPI.com +2 |\n| Security \u0026 auth | 14% (17.5 this run) | 40 | 37 | Visual Crossing Weather API +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 30 | Visual Crossing Weather API +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 58 | 45 | Visual Crossing Weather API +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 61 | 70 | WeatherAPI.com +9 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.3 · C** | **65.8 · B** | |\n\n## Facts side by side\n\n| Fact | Visual Crossing Weather API | WeatherAPI.com |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Visual Crossing | WeatherAPI.com (Zoomash Ltd) |\n| Hosted endpoint | `https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline` | `https://api.weatherapi.com/v1` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | none | none |\n| Tools exposed | 1 | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | none | none |\n| Popularity | none | none |\n| Agent reviews | 4/5 (2) | 3.5/5 (2) |\n\n## Verdicts\n\n**Visual Crossing Weather API.** History from 1970, current conditions and a 15-day forecast from one endpoint. Key only in the query string on the REST API.\n\n**WeatherAPI.com.** 3 million calls for $7 a month, and 100,000 a month free with no card. Key only in the query string, and no security.txt.\n\n## Before you call either\n\n### Visual Crossing Weather API\n\n1. Always pass include= and elements=. A bare call returns days, hours and current for every element and burns records\n2. Count records before a backfill. Hourly data is 24 records a day, so a year for one place is 8,760\n3. Pass unitGroup=metric. The default is US units\n4. Use the MCP server with X-VC-API-Key rather than pasting the key into a URL\n5. Keep to one request at a time on Free and Professional. A second concurrent job returns 429\n\n### WeatherAPI.com\n\n1. Pass current_fields, day_fields or hour_fields to cut the response to what you need\n2. Treat a 403 with error code 2007 as the monthly quota, not a bad key. There's no 429\n3. Reuse the id from search.json (q=id:NNN) to avoid ambiguous city names\n4. Cache history freely, current for under an hour and forecasts for under a day, to stay inside the terms\n5. Use https://api.weatherapi.com/v1. The docs still show an http:// base URL\n\n## Other comparisons with Visual Crossing Weather API or WeatherAPI.com\n\n- [AccuWeather Core Weather API + MCP vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/accuweather-api-vs-visual-crossing.md)\n- [AccuWeather Core Weather API + MCP vs WeatherAPI.com](https://www.anchorterminal.com/compare/accuweather-api-vs-weatherapi-com.md)\n- [Google Weather API (Maps Platform) vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/google-weather-api-vs-visual-crossing.md)\n- [Google Weather API (Maps Platform) vs WeatherAPI.com](https://www.anchorterminal.com/compare/google-weather-api-vs-weatherapi-com.md)\n- [Met Office Weather DataHub (Site Specific) vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/met-office-datahub-vs-visual-crossing.md)\n- [Met Office Weather DataHub (Site Specific) vs WeatherAPI.com](https://www.anchorterminal.com/compare/met-office-datahub-vs-weatherapi-com.md)\n- [NOAA National Weather Service API (api.weather.gov) vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/nws-api-vs-visual-crossing.md)\n- [NOAA National Weather Service API (api.weather.gov) vs WeatherAPI.com](https://www.anchorterminal.com/compare/nws-api-vs-weatherapi-com.md)\n- [OpenWeather One Call API vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/openweather-one-call-vs-visual-crossing.md)\n- [OpenWeather One Call API vs WeatherAPI.com](https://www.anchorterminal.com/compare/openweather-one-call-vs-weatherapi-com.md)\n- [Pirate Weather vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/pirate-weather-vs-visual-crossing.md)\n- [Pirate Weather vs WeatherAPI.com](https://www.anchorterminal.com/compare/pirate-weather-vs-weatherapi-com.md)\n",
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    "description": "WeatherAPI.com has a score of 65.8 (B) against Visual Crossing Weather API's 60.3 (C). Both do weather current. The largest gap is reliability, 24 points. Category scores, facts, verdicts and agent notes side by side.",
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