{ "data": { "a": { "slug": "tomorrow-io", "name": "Tomorrow.io Weather API", "vendor": "The Tomorrow Companies Inc.", "vendorUrl": "https://www.tomorrow.io", "kind": "http-api", "category": "weather", "summary": "Tomorrow.io's Weather API returns current conditions, forecasts, recent and archived history, map tiles, route weather and alert webhooks for a coordinate, place name or GeoJSON shape. It is a REST API with a hosted MCP server.", "url": "https://www.anchorterminal.com/tools/tomorrow-io", "markdownUrl": "https://www.anchorterminal.com/tools/tomorrow-io.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/tomorrow-io.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/tomorrow-io.json", "license": "Proprietary service under Tomorrow.io's subscription terms", "transports": [ "http" ], "remoteUrl": "https://api.tomorrow.io/v4", "packages": [], "auth": "mixed", "authNotes": "A person signs up in a browser and copies the key from the dashboard. The key goes in an `apikey` header or query parameter on REST calls and in `X-Api-Key` for the MCP server. The docs say keys carry full privileges, and more keys are created by an account manager. The MCP endpoint also advertises OAuth with dynamic client registration, PKCE and one scope, `mcp:read`.", "pricing": "freemium", "pricingNotes": "Free plan with no published price for anything above it. Free covers core data layers, a 5-day forecast, 24 hours of history, one monitored location and one alert, and the terms bar commercial use on self-generated accounts. Enterprise is by quote and adds the 14-day forecast, premium layers, routes, maps and the historical archive, which is metered in tokens with no public token price (https://www.tomorrow.io/weather-api/, checked 2026-10-08).", "priceSummary": "Freemium", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, the OpenAPI file or the plan table (checked 2026-10-08).", "endpoints": [] }, "toolCount": 11, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://docs.tomorrow.io/reference/welcome", "llmsTxt": "https://docs.tomorrow.io/llms.txt", "openapi": "https://docs.tomorrow.io/openapi/tomorrowio-api.json", "capabilities": [ "weather.current", "weather.forecast", "weather.historical", "weather.alerts", "weather.marine", "data.weather" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "openapi", "llms-txt", "mcp", "webhooks", "status-page", "sales-led", "us" ], "lastRelease": "2026-07-14", "graded": true, "anchor": { "graded": true, "score": 51.4, "grade": "D", "agentReady": false, "rank": 578, "ranked": true, "rankOf": 722, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 27, "payments": 20, "reliability": 55, "schema": 75, "security": 34, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A public OpenAPI 3.1 file, Markdown docs with llms.txt and a hosted MCP server with 11 tools suit agents, and a free plan exists. Paid prices are by quote only, free keys are barred from commercial use, the docs give no numeric rate limits, and the status page lists 50 incidents in 85 days, mostly stale or degraded data.", "bestFor": "Teams that need minute-level and route or polygon forecasts, alert webhooks and a hosted MCP server, and will buy through sales.", "strengths": [ "Public OpenAPI 3.1.0 file (version 4.0.1, 31 paths, 39 operations), plus llms.txt and a Markdown copy of every docs page", "Hosted MCP server at api.tomorrow.io/v4/tomorrow-weather/mcp with 11 documented tools, added in April 2026", "The `fields`, `timesteps`, `startTime` and `endTime` parameters size a Timelines response to what the task needs", "Six-digit error codes that the docs say stay fixed, and soft warnings returned beside partial data", "Alert webhooks signed with HMAC-SHA256 in an `X-Signature` header, retried up to two times" ], "weaknesses": [ "No public price for paid use. The plan table lists Free and Enterprise, the second by quote", "The subscription terms bar commercial use on self-generated accounts and forbid storing unaltered data without an order", "No numeric rate limits in the reviewed docs, and remaining-limit headers are documented for Enterprise accounts only", "Keys carry full privileges and may be sent as an `apikey` query parameter. More keys come through an account manager", "50 incidents on the status page between 15 July and 2 October 2026, 25 naming the Timeline or Historical API", "No official SDK, no security.txt, and no certification or disclosure policy found on the pages read" ], "agentNotes": [ "Send the key in the `apikey` header, not the query string, so it stays out of URLs and logs", "Request only the `fields` and `timesteps` needed on POST /timelines. Free plans cover 24 hours back and 5 days ahead at `1h` and `1d`", "Split archive requests. POST /historical takes at most 31 days per call and deducts tokens, 1 for a point and 10 for a polygon", "Treat 401 with code 401001 as a missing or bad key. The docs say 403, the live API answered 401 on 8 October 2026", "On 429 back off without a hint. `Retry-After` is documented only for 503", "Check the plan's terms before storing or reselling responses. Free accounts are limited to non-commercial use with a Powered by Tomorrow.io link" ], "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": 51.4 } ], "editorialScores": { "ergonomics": 73, "maintenance": 27, "payments": 20, "reliability": 55, "schema": 75, "security": 34, "transparency": 42 }, "provenanceScore": 84 }, "connect": { "http": "curl --request GET --url 'https://api.tomorrow.io/v4/weather/realtime?location=42.3478,-71.0466' --header 'apikey: API_KEY'", "config": { "mcpServers": { "tomorrow-weather-mcp": { "headers": { "X-Api-Key": "${TOMORROW_API_KEY}" }, "type": "http", "url": "https://api.tomorrow.io/v4/tomorrow-weather/mcp" } } } }, "letme": { "capability": "https://letme.dev/weather.current", "tool": "https://letme.dev/tomorrow-io" }, "area": "domain-data", "provenance": { "legalEntity": "The Tomorrow Companies Inc.", "domain": "tomorrow.io", "domainRegistered": "2012-02-15", "endpointOnVendorDomain": true, "terms": "https://www.tomorrow.io/legal/terms-of-service/", "privacy": "https://www.tomorrow.io/legal/product-privacy-policy/", "statusPage": "https://status.tomorrow.io", "changelog": "https://docs.tomorrow.io/reference/release-notes", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The subscription terms (last updated 19 October 2023) name The Tomorrow Companies Inc., a Delaware corporation with its principal place of business in Boston, Massachusetts, and cover the API, the dashboard and the data portal.", "The product privacy policy (last updated 17 December 2024) covers the API and platform and names Tomorrow.io Inc. as operator. The website has a separate privacy policy and terms of use, which we did not use here.", "The API and the MCP server answer at api.tomorrow.io.", "www.tomorrow.io, tomorrow.io and api.tomorrow.io each return 404 for /.well-known/security.txt.", "RDAP gives a registration date of 2012-02-15 for tomorrow.io. The status page runs on Atlassian Statuspage." ], "score": 84 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/tomorrow-io.json", "live": { "slug": "tomorrow-io", "probe": { "target": "https://api.tomorrow.io/v4", "method": "get", "lastAt": "2026-10-09T00:10:40.841547826Z", "lastOk": true, "lastStatus": 404, "lastMs": 141, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 148, "p95ms24h": 211, "samples24h": 72, "samples30d": 72, "days": [ { "date": "2026-10-08", "probes": 70, "ok": 70 }, { "date": "2026-10-09", "probes": 2, "ok": 2 } ] }, "vendorStatus": { "page": "https://status.tomorrow.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-09T00:13:50.546087105Z" }, "pages": [ { "url": "https://docs.tomorrow.io/reference/release-notes", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:19:37.617241436Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5c08804d147f" }, { "url": "https://www.tomorrow.io/legal/product-privacy-policy/", "kind": "privacy", "status": 0, "checkedAt": "2026-10-08T18:31:01.004304542Z", "changedAt": "0001-01-01T00:00:00Z", "blockedByRobots": true }, { "url": "https://www.tomorrow.io/legal/terms-of-service/", "kind": "terms", "status": 0, "checkedAt": "2026-10-08T18:31:01.446636319Z", "changedAt": "0001-01-01T00:00:00Z", "blockedByRobots": true } ], "updatedAt": "2026-10-09T00:13:50.546087105Z" } }, "answer": "Visual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust.", "b": { "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": 59.9, "grade": "C", "agentReady": false, "rank": 417, "ranked": true, "rankOf": 722, "categoryRank": 6, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 78, "maintenance": 58, "payments": 40, "reliability": 66, "schema": 74, "security": 40, "transparency": 56 }, "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.", "bestFor": "History and backfills, climate normals and date-range questions from one endpoint.", "strengths": [ "History from 1970, current conditions and a 15-day forecast from one endpoint", "$0.0001 a record with 1,000 free a day and no card", "Official MCP server with one tool, key in a header or OAuth", "llms.txt, an OpenAPI spec and a quarterly changelog, most recently 4 September 2026", "Status page and published uptime targets of 99.5 per cent free and 99.9 paid" ], "weaknesses": [ "Key only in the query string on the REST API", "OpenAPI spec defines no enums and no error responses", "Privacy policy states no retention periods or subprocessors", "Storing results needs the right licence level, and the terms carry a non-compete", "No security.txt, disclosure policy or MCP registry entry" ], "agentNotes": [ "Always pass include= and elements=. A bare call returns days, hours and current for every element and burns records", "Count records before a backfill. Hourly data is 24 records a day, so a year for one place is 8,760", "Pass unitGroup=metric. The default is US units", "Use the MCP server with X-VC-API-Key rather than pasting the key into a URL", "Keep to one request at a time on Free and Professional. A second concurrent job returns 429" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 4, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 59.9 } ], "editorialScores": { "ergonomics": 78, "maintenance": 58, "payments": 40, "reliability": 66, "schema": 74, "security": 40, "transparency": 31 }, "provenanceScore": 81, "dataQualityScore": 77 }, "connect": { "http": "curl \"https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/51.51,-0.13/2026-09-01/2026-09-07?unitGroup=metric\u0026include=days\u0026elements=datetime,tempmax,tempmin,precip\u0026contentType=json\u0026key=$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": 81 }, "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": "2026-10-09T00:10:42.482422546Z", "lastOk": true, "lastStatus": 401, "lastMs": 254, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 258, "p95ms24h": 287, "samples24h": 268, "samples30d": 1986, "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": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 2, "ok": 2 } ] }, "vendorStatus": { "page": "https://status.visualcrossing.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:39:19.509705636Z" }, "githubStars": 55, "securityTxt": { "url": "https://visualcrossing.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:44.450892111Z" }, "llmsTxt": { "url": "https://www.visualcrossing.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:59.87209822Z" }, "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": "2026-10-08T18:31:26.954477832Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "77ecfd35a643" }, { "url": "https://www.visualcrossing.com/weather-data-pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:31:28.908919562Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "cb8af14c5632" }, { "url": "https://www.visualcrossing.com/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:31:24.247930307Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0ccd098bba16" }, { "url": "https://www.visualcrossing.com/weather-services-terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:31:30.34526422Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5225b6169954" } ], "updatedAt": "2026-10-09T00:10:42.482422546Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "The Tomorrow Companies Inc.", "b": "Visual Crossing", "name": "Vendor" }, { "a": "https://api.tomorrow.io/v4", "b": "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Tomorrow.io's subscription terms", "b": "none", "name": "Licence" }, { "a": "11", "b": "1", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-07-14", "b": "none", "name": "Last release" }, { "a": "couldn't be read", "b": "2023-01-01", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "4/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Visual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust.", "question": "Which is better for AI agents, Tomorrow.io Weather API or Visual Crossing Weather API?" }, { "answer": "Tomorrow.io Weather API takes an API key or an OAuth sign-in. Visual Crossing Weather API needs an API key.", "question": "Do Tomorrow.io Weather API and Visual Crossing Weather API need an API key?" }, { "answer": "Yes. Tomorrow.io Weather API has a hosted endpoint at https://api.tomorrow.io/v4 and Visual Crossing Weather API at https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline.", "question": "Can an agent call Tomorrow.io Weather API and Visual Crossing Weather API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Transparency \u0026 trust, 63 against 56" ], "also": null, "goodFor": "Teams that need minute-level and route or polygon forecasts, alert webhooks and a hosted MCP server, and will buy through sales.", "slug": "tomorrow-io", "watchFor": "No public price for paid use. The plan table lists Free and Enterprise, the second by quote" }, { "aheadOn": [ "Reliability, 66 against 55", "Agent ergonomics, 78 against 73", "Security \u0026 auth, 40 against 34", "Payments \u0026 pricing, 40 against 20", "Maintenance \u0026 community, 58 against 27" ], "also": [ "Free to start without a card" ], "goodFor": "History and backfills, climate normals and date-range questions from one endpoint.", "slug": "visual-crossing", "watchFor": "Key only in the query string on the REST API" } ], "job": { "capability": "weather.current", "name": "Weather current" }, "others": [ { "json": "https://www.anchorterminal.com/compare/accuweather-api-vs-tomorrow-io.json", "title": "AccuWeather Core Weather API + MCP vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/accuweather-api-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/accuweather-api-vs-visual-crossing.json", "title": "AccuWeather Core Weather API + MCP vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/accuweather-api-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/google-weather-api-vs-tomorrow-io.json", "title": "Google Weather API (Maps Platform) vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/google-weather-api-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/google-weather-api-vs-visual-crossing.json", "title": "Google Weather API (Maps Platform) vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/google-weather-api-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/met-office-datahub-vs-tomorrow-io.json", "title": "Met Office Weather DataHub (Site Specific) vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/met-office-datahub-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/met-office-datahub-vs-visual-crossing.json", "title": "Met Office Weather DataHub (Site Specific) vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/met-office-datahub-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/meteoblue-vs-tomorrow-io.json", "title": "meteoblue Weather API vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/meteoblue-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/meteoblue-vs-visual-crossing.json", "title": "meteoblue Weather API vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/meteoblue-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/meteomatics-vs-tomorrow-io.json", "title": "Meteomatics Weather API vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/meteomatics-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/meteomatics-vs-visual-crossing.json", "title": "Meteomatics Weather API vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/meteomatics-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/nws-api-vs-tomorrow-io.json", "title": "NOAA National Weather Service API (api.weather.gov) vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/nws-api-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/nws-api-vs-visual-crossing.json", "title": "NOAA National Weather Service API (api.weather.gov) vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/nws-api-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/openweather-one-call-vs-tomorrow-io.json", "title": "OpenWeather One Call API vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/openweather-one-call-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/openweather-one-call-vs-visual-crossing.json", "title": "OpenWeather One Call API vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/openweather-one-call-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/pirate-weather-vs-tomorrow-io.json", "title": "Pirate Weather vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/pirate-weather-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/pirate-weather-vs-visual-crossing.json", "title": "Pirate Weather vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/pirate-weather-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weather-company.json", "title": "Tomorrow.io Weather API vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherapi-com.json", "title": "Tomorrow.io Weather API vs WeatherAPI.com", "url": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherapi-com" }, { "json": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherbit.json", "title": "Tomorrow.io Weather API vs Weatherbit API", "url": "https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherbit" }, { "json": "https://www.anchorterminal.com/compare/tomorrow-io-vs-xweather.json", "title": "Tomorrow.io Weather API vs Xweather Weather API", "url": "https://www.anchorterminal.com/compare/tomorrow-io-vs-xweather" }, { "json": "https://www.anchorterminal.com/compare/visual-crossing-vs-weather-company.json", "title": "Visual Crossing Weather API vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/visual-crossing-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/visual-crossing-vs-weatherapi-com.json", "title": "Visual Crossing Weather API vs WeatherAPI.com", "url": "https://www.anchorterminal.com/compare/visual-crossing-vs-weatherapi-com" }, { "json": "https://www.anchorterminal.com/compare/visual-crossing-vs-weatherbit.json", "title": "Visual Crossing Weather API vs Weatherbit API", "url": "https://www.anchorterminal.com/compare/visual-crossing-vs-weatherbit" }, { "json": "https://www.anchorterminal.com/compare/visual-crossing-vs-xweather.json", "title": "Visual Crossing Weather API vs Xweather Weather API", "url": "https://www.anchorterminal.com/compare/visual-crossing-vs-xweather" } ], "scores": [ { "by": 11, "edge": "visual-crossing", "key": "reliability", "name": "Reliability", "tomorrow-io": 55, "visual-crossing": 66, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 1, "edge": "tomorrow-io", "key": "schema", "name": "Schema \u0026 documentation", "tomorrow-io": 75, "visual-crossing": 74, "weight": 13 }, { "by": 5, "edge": "visual-crossing", "key": "ergonomics", "name": "Agent ergonomics", "tomorrow-io": 73, "visual-crossing": 78, "weight": 13 }, { "by": 6, "edge": "visual-crossing", "key": "security", "name": "Security \u0026 auth", "tomorrow-io": 34, "visual-crossing": 40, "weight": 14 }, { "by": 20, "edge": "visual-crossing", "key": "payments", "name": "Payments \u0026 pricing", "tomorrow-io": 20, "visual-crossing": 40, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 31, "edge": "visual-crossing", "key": "maintenance", "name": "Maintenance \u0026 community", "tomorrow-io": 27, "visual-crossing": 58, "weight": 7 }, { "by": 7, "edge": "tomorrow-io", "key": "transparency", "name": "Transparency \u0026 trust", "tomorrow-io": 63, "visual-crossing": 56, "weight": 7 } ], "summary": "Visual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust. Both do weather current.", "verdicts": { "tomorrow-io": "A public OpenAPI 3.1 file, Markdown docs with llms.txt and a hosted MCP server with 11 tools suit agents, and a free plan exists. Paid prices are by quote only, free keys are barred from commercial use, the docs give no numeric rate limits, and the status page lists 50 incidents in 85 days, mostly stale or degraded data.", "visual-crossing": "History from 1970, current conditions and a 15-day forecast from one endpoint. Key only in the query string on the REST API." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing", "json": "https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing.md", "slim": "https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing.min.md" }, "markdown": "Visual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust. Both do weather current.\n\n- Tomorrow.io Weather API: grade D, 51.4/100, rank #578 of 722. Markdown https://www.anchorterminal.com/tools/tomorrow-io.md · JSON https://www.anchorterminal.com/api/v1/tools/tomorrow-io.json\n- Visual Crossing Weather API: grade C, 59.9/100, rank #417 of 722. Markdown https://www.anchorterminal.com/tools/visual-crossing.md · JSON https://www.anchorterminal.com/api/v1/tools/visual-crossing.json\n\n## Which one, for what\n\n### Tomorrow.io Weather API (D)\n\nGood for: Teams that need minute-level and route or polygon forecasts, alert webhooks and a hosted MCP server, and will buy through sales.\n\nAhead on:\n- Transparency \u0026 trust, 63 against 56\n\nWatch for: No public price for paid use. The plan table lists Free and Enterprise, the second by quote\n\n### Visual Crossing Weather API (C)\n\nGood for: History and backfills, climate normals and date-range questions from one endpoint.\n\nAhead on:\n- Reliability, 66 against 55\n- Agent ergonomics, 78 against 73\n- Security \u0026 auth, 40 against 34\n- Payments \u0026 pricing, 40 against 20\n- Maintenance \u0026 community, 58 against 27\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Key only in the query string on the REST API\n\n\n## Score by category\n\n| Category | Weight | Tomorrow.io Weather API | Visual Crossing Weather API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 55 | 66 | Visual Crossing Weather API +11 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 75 | 74 | Tomorrow.io Weather API +1 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 78 | Visual Crossing Weather API +5 |\n| Security \u0026 auth | 14% (17.5 this run) | 34 | 40 | Visual Crossing Weather API +6 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Visual Crossing Weather API +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 27 | 58 | Visual Crossing Weather API +31 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 56 | Tomorrow.io Weather API +7 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **51.4 · D** | **59.9 · C** | |\n\n## Facts side by side\n\n| Fact | Tomorrow.io Weather API | Visual Crossing Weather API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | The Tomorrow Companies Inc. | Visual Crossing |\n| Hosted endpoint | `https://api.tomorrow.io/v4` | `https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline` |\n| Transports | HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Proprietary service under Tomorrow.io's subscription terms | none |\n| Tools exposed | 11 | 1 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-07-14 | none |\n| Terms last updated | couldn't be read | 2023-01-01 |\n| Privacy policy last updated | couldn't be read | no date given |\n| Customer content may train models | couldn't be read | not found in the text |\n| Terms restrict automated access | couldn't be read | not found in the text |\n| Terms restrict benchmarking | couldn't be read | yes |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | not found in the text |\n| Agent reviews | none | 4/5 (2) |\n\n## Verdicts\n\n**Tomorrow.io Weather API.** A public OpenAPI 3.1 file, Markdown docs with llms.txt and a hosted MCP server with 11 tools suit agents, and a free plan exists. Paid prices are by quote only, free keys are barred from commercial use, the docs give no numeric rate limits, and the status page lists 50 incidents in 85 days, mostly stale or degraded data.\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## Before you call either\n\n### Tomorrow.io Weather API\n\n1. Send the key in the `apikey` header, not the query string, so it stays out of URLs and logs\n2. Request only the `fields` and `timesteps` needed on POST /timelines. Free plans cover 24 hours back and 5 days ahead at `1h` and `1d`\n3. Split archive requests. POST /historical takes at most 31 days per call and deducts tokens, 1 for a point and 10 for a polygon\n4. Treat 401 with code 401001 as a missing or bad key. The docs say 403, the live API answered 401 on 8 October 2026\n5. On 429 back off without a hint. `Retry-After` is documented only for 503\n6. Check the plan's terms before storing or reselling responses. Free accounts are limited to non-commercial use with a Powered by Tomorrow.io link\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## Questions\n\n### Which is better for AI agents, Tomorrow.io Weather API or Visual Crossing Weather API?\n\nVisual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust.\n\n### Do Tomorrow.io Weather API and Visual Crossing Weather API need an API key?\n\nTomorrow.io Weather API takes an API key or an OAuth sign-in. Visual Crossing Weather API needs an API key.\n\n### Can an agent call Tomorrow.io Weather API and Visual Crossing Weather API without installing anything?\n\nYes. Tomorrow.io Weather API has a hosted endpoint at https://api.tomorrow.io/v4 and Visual Crossing Weather API at https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing.json, and with the fewest tokens: https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"tomorrow-io\", \"b\": \"visual-crossing\"}`. From a terminal: `anchor compare tomorrow-io visual-crossing`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/tomorrow-io.json and https://www.anchorterminal.com/api/v1/tools/visual-crossing.json\n\n## Other comparisons with Tomorrow.io Weather API or Visual Crossing Weather API\n\n- [AccuWeather Core Weather API + MCP vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/accuweather-api-vs-tomorrow-io.md)\n- [AccuWeather Core Weather API + MCP vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/accuweather-api-vs-visual-crossing.md)\n- [Google Weather API (Maps Platform) vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/google-weather-api-vs-tomorrow-io.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- [Met Office Weather DataHub (Site Specific) vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/met-office-datahub-vs-tomorrow-io.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- [meteoblue Weather API vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/meteoblue-vs-tomorrow-io.md)\n- [meteoblue Weather API vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/meteoblue-vs-visual-crossing.md)\n- [Meteomatics Weather API vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/meteomatics-vs-tomorrow-io.md)\n- [Meteomatics Weather API vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/meteomatics-vs-visual-crossing.md)\n- [NOAA National Weather Service API (api.weather.gov) vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/nws-api-vs-tomorrow-io.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- [OpenWeather One Call API vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/openweather-one-call-vs-tomorrow-io.md)\n- [OpenWeather One Call API vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/openweather-one-call-vs-visual-crossing.md)\n- [Pirate Weather vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/pirate-weather-vs-tomorrow-io.md)\n- [Pirate Weather vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/pirate-weather-vs-visual-crossing.md)\n- [Tomorrow.io Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/tomorrow-io-vs-weather-company.md)\n- [Tomorrow.io Weather API vs WeatherAPI.com](https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherapi-com.md)\n- [Tomorrow.io Weather API vs Weatherbit API](https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherbit.md)\n- [Tomorrow.io Weather API vs Xweather Weather API](https://www.anchorterminal.com/compare/tomorrow-io-vs-xweather.md)\n- [Visual Crossing Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/visual-crossing-vs-weather-company.md)\n- [Visual Crossing Weather API vs WeatherAPI.com](https://www.anchorterminal.com/compare/visual-crossing-vs-weatherapi-com.md)\n- [Visual Crossing Weather API vs Weatherbit API](https://www.anchorterminal.com/compare/visual-crossing-vs-weatherbit.md)\n- [Visual Crossing Weather API vs Xweather Weather API](https://www.anchorterminal.com/compare/visual-crossing-vs-xweather.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "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": "Tomorrow.io Weather API vs Visual Crossing Weather API", "url": "" } ], "description": "Visual Crossing Weather API scores 59.9 (C) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in 5 of 7 scored categories. Tomorrow.io Weather API leads on transparency \u0026 trust. Both do weather current. Category scores, facts, verdicts and agent notes side…", "facts": [ "Tomorrow.io Weather API D 51.4", "Visual Crossing Weather API C 59.9", "scores" ], "h1": "Tomorrow.io Weather API vs Visual Crossing Weather API", "image": "https://www.anchorterminal.com/assets/og/compare-tomorrow-io-vs-visual-crossing.png", "path": "/compare/tomorrow-io-vs-visual-crossing", "published": "2026-10-01", "section": "tools", "title": "Tomorrow.io Weather API vs Visual Crossing Weather API for AI agents", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/tomorrow-io-vs-visual-crossing" }, "tokens": { "markdown": 2700, "slim": 730 }, "version": 1 }