{ "data": { "a": { "slug": "stormglass", "name": "Stormglass API", "vendor": "Storm Glass AB", "vendorUrl": "https://stormglass.io", "kind": "http-api", "category": "weather", "summary": "Weather and marine data API from Storm Glass AB of Sweden. It returns hourly forecasts, ERA5 history from 2014, tides, solar, soil and ocean parameters by coordinates, per source or blended, over HTTPS with an API key.", "url": "https://www.anchorterminal.com/tools/stormglass", "markdownUrl": "https://www.anchorterminal.com/tools/stormglass.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/stormglass.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/stormglass.json", "license": "Proprietary service under Storm Glass AB's Terms and Conditions. The Free and Small plans are not for commercial use", "transports": [ "http" ], "remoteUrl": "https://api.stormglass.io/v2", "packages": [], "auth": "api-key", "authNotes": "Self-serve key from a browser signup at dashboard.stormglass.io. The key goes in the `Authorization` header with no prefix. No scopes, and no key rotation or second key is described in the docs.", "pricing": "freemium", "pricingNotes": "Free plan at 10 requests a day for non-commercial evaluation. Paid plans are monthly subscriptions in euros with daily quotas and no overage price, Small 19, Medium 49 and Large 129 euros a month, and commercial use needs Medium or higher. Prices are in euros only, so unitPrices is empty (https://stormglass.io/pricing/, checked 2026-10-09).", "priceSummary": "Freemium", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API docs, the pricing page or the FAQ. The API uses HTTP 402 to mean a spent daily quota, with no payment protocol behind it (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://docs.stormglass.io/", "capabilities": [ "weather.forecast", "weather.marine", "weather.historical", "data.weather" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "eu" ], "lastRelease": "2026-02-26", "graded": true, "anchor": { "graded": true, "score": 39.9, "grade": "E", "agentReady": false, "rank": 914, "ranked": true, "rankOf": 950, "categoryRank": 15, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 65, "maintenance": 15, "payments": 25, "reliability": 34, "schema": 40, "security": 44, "transparency": 45 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "A read-only weather and marine API with about 70 hourly parameters, per-source values from named national models, tide data and ERA5 history from 2014. No OpenAPI file, status page, SDK or security page was found, the free plan allows 10 requests a day, and the docs and FAQ disagree on the status code for a spent quota.", "bestFor": "Marine and coastal applications that want waves, swell, currents and tides beside ordinary weather, and callers who want to compare named models in one response.", "strengths": [ "One request returns the same parameter from each named source (ECMWF, NOAA, DWD, Met Office, MET Norway and others), or one blended value with `source=sg`", "Marine coverage in the same API, with waves, swell, currents, sea ice, water temperature, tide extremes, sea level against seven datums and bathymetry", "`params` and `source` limit each response to the fields asked for, and every response carries `dailyQuota` and `requestCount` in `meta`", "The key travels in the `Authorization` header, and every documented endpoint is a GET", "Plan prices and daily quotas are public without a login, from 0 to 129 euros a month" ], "weaknesses": [ "No OpenAPI file, llms.txt, official SDK or changelog was found. The docs are eleven Markdown pages", "No status page, SLA, security.txt, disclosure policy, certification or DPA was found, and the terms disclaim uninterrupted service", "Free plan is 10 requests a day, non-commercial, and the terms call it an evaluation plan not meant for indefinite use", "The docs give 402 for a spent daily quota and the FAQ says Too Many Requests. No Retry-After or per-second limit is documented", "The privacy text is a few paragraphs inside the terms, with no retention period or hosting location, and the terms allow changes to the service without notice" ], "agentNotes": [ "Send the key as `Authorization: KEY` with no Bearer prefix. A missing or wrong key returns 403 with `{\"errors\":{\"key\":\"API key is invalid\"}}`", "Always pass `source=sg` or a short source list on `/weather/point`. The default is every source, which multiplies the size of each hourly record", "Treat 402 as a spent daily quota, not a billing failure, and stop until the next day. Read `meta.requestCount` against `meta.dailyQuota` on each response", "Use `/historical/point` for past dates, at most 10 days a call and nothing newer than about 7 days. `/weather/point` looks back 14 days only", "Send and read all times in UTC. Tide sea levels are relative to the chosen datum (MSL by default) and are not water depth" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 39.9 } ], "editorialScores": { "ergonomics": 65, "maintenance": 15, "payments": 25, "reliability": 34, "schema": 40, "security": 44, "transparency": 22 }, "provenanceScore": 68 }, "connect": { "http": "curl -H \"Authorization: API_KEY\" \"https://api.stormglass.io/v2/weather/point?lat=58.7984\u0026lng=17.8081\u0026params=waveHeight,airTemperature\u0026source=sg\"" }, "letme": { "capability": "https://letme.dev/weather.forecast", "tool": "https://letme.dev/stormglass" }, "area": "domain-data", "provenance": { "legalEntity": "Storm Glass AB", "domain": "stormglass.io", "domainRegistered": "2018-01-30", "endpointOnVendorDomain": true, "terms": "https://stormglass.io/terms-and-conditions/", "privacy": "https://stormglass.io/terms-and-conditions/", "statusPage": "", "changelog": "https://stormglass.io/blog/", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "One page, dated 17 March 2026, holds the Terms and Conditions and the Privacy Policy. It says it applies to all stormglass.io Services provided by Storm Glass AB, under Swedish law with arbitration in Stockholm. No postal address or company number is on it.", "The privacy text is a section of that page and names HubSpot. No DPA or separate privacy policy was found.", "stormglass.io/.well-known/security.txt returns 404.", "No status page is linked from the site, the docs or the terms.", "No changelog was found. The blog announces new data sources, the latest on 26 February 2026 (ERA5) and 13 February 2026 (NOAA AIGFS).", "RDAP for stormglass.io gives a registration date of 2018-01-30." ], "score": 68 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/stormglass.json", "live": { "slug": "stormglass", "probe": { "target": "https://api.stormglass.io/v2", "method": "get", "lastAt": "2026-10-10T03:07:22.508929733Z", "lastOk": true, "lastStatus": 404, "lastMs": 85, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 92, "p95ms24h": 189, "samples24h": 117, "samples30d": 117, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 32, "ok": 32 } ] }, "pages": [ { "url": "https://stormglass.io/blog/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:46:02.001753939Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5a37464aafd0" }, { "url": "https://stormglass.io/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:46:04.76357096Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f271b3b3e8f6" }, { "url": "https://stormglass.io/terms-and-conditions/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:46:06.564080089Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b9087482d5aa" } ], "updatedAt": "2026-10-10T03:07:22.508929733Z" } }, "answer": "The Weather Company Data APIs scores 52.6 (D) on agent readiness against Stormglass API's 39.9 (E), and leads in 5 of 7 scored categories. Stormglass API leads on agent ergonomics and payments \u0026 pricing.", "b": { "slug": "weather-company", "name": "The Weather Company Data APIs", "vendor": "The Weather Company, LLC", "vendorUrl": "https://www.weathercompany.com", "kind": "http-api", "category": "weather", "summary": "The Weather Company Data APIs return current conditions, forecasts to 15 days, historical data, government alerts, imagery and aviation weather from the company behind weather.com. Access is by API key at `api.weather.com`, sold in packages to businesses.", "url": "https://www.anchorterminal.com/tools/weather-company", "markdownUrl": "https://www.anchorterminal.com/tools/weather-company.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/weather-company.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/weather-company.json", "license": "Proprietary service. Use is under a content licensing agreement with The Weather Company, which is not published", "transports": [ "http" ], "remoteUrl": "https://api.weather.com", "packages": [], "auth": "api-key", "authNotes": "An API key is required and is sent as the `apiKey` query parameter on every request. No header option is documented. Keys are not self-serve. A person requests a 30-day trial by form or contacts sales, the company provisions the key, and the key is read in the API customer portal after an invitation. Each key is entitled to the endpoints in the customer's package, and an endpoint outside it returns 401.", "pricing": "paid", "pricingNotes": "Standard package $500 a month on an annual plan for 1 million API calls. Enterprise plans and add-on packages are by quote, and overage is charged as the contract defines. A free 30-day trial allows 50,000 calls a day at 100 a minute, is requested by form and is limited to enterprise customers, so an agent cannot start without a person and sales approval (checked 2026-10-08).", "priceSummary": "$500 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer documentation, the API references or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://developer.weather.com/docs/home", "capabilities": [ "weather.current", "weather.forecast", "weather.historical", "weather.alerts", "weather.marine", "data.weather" ], "tags": [ "hosted", "paid", "enterprise", "sales-led", "closed-source", "status-page", "api-key", "aviation", "air-quality" ], "lastRelease": "2026-09-14", "graded": true, "anchor": { "graded": true, "score": 52.6, "grade": "D", "agentReady": false, "rank": 734, "ranked": true, "rankOf": 950, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 54, "maintenance": 36, "payments": 20, "reliability": 73, "schema": 67, "security": 48, "transparency": 49 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A wide weather data API with 168 API references built from OpenAPI documents, global 4 km current conditions, hourly history from June 2015 and a status page with component history. Keys come only through a sales-reviewed trial or contract, travel only in the URL, and the terms that govern the API are not published.", "bestFor": "A business that wants one contract for global forecasts, 4 km current conditions, alerts, imagery, aviation and deep history, and that can go through sales.", "strengths": [ "168 API reference sections on developer.weather.com are generated from OpenAPI documents, with enums, patterns, required fields, example responses and 13 response codes per operation.", "The Standard package covers current conditions, daily and hourly forecasts to 15 days, alerts from six national agencies, imagery, marine tiles, tides and air quality.", "History on Demand returns hourly gridded history at about 4 km from June 2015, in JSON, CSV or Parquet, with paging, field selection and a compact mode.", "The status page lists 16 components. Its feed shows nine incidents between 10 July and 8 October 2026, all rated minor or none.", "The Standard package price is public, $500 a month on an annual plan for 1 million calls, and the trial allows 50,000 calls a day for 30 days." ], "weaknesses": [ "No self-serve signup. The trial is requested through a form, is limited to enterprise customers, and the Buy now button opens a contact form.", "The API key is accepted only as the `apiKey` query parameter, so it appears in every request URL. No header option is documented.", "The website terms of use say they do not apply to the data APIs and point to separate terms, which we did not find published.", "Exceeding a rate limit returns 401, the same status as a missing key. No 429, Retry-After or backoff guidance is documented.", "No llms.txt, no downloadable OpenAPI file, no official SDK and no MCP server were found. Only one dated changelog entry appeared in 42 API references sampled." ], "agentNotes": [ "Send `units`, `language` and `format=json` with a location on every v3 call, plus `Accept-Encoding: gzip`, which the usage guide marks as required.", "Keep the key out of logs and client-side code, because it travels in the query string as `apiKey`.", "Treat a 401 as either a bad key, an endpoint outside the key's package or an exceeded limit, and treat a 204 as no data for the query.", "Each forecast duration (`3day` to `15day`) is a separate entitlement. Request only durations the contract covers.", "Use `/v3/aggcommon` to combine up to 10 products in one request. Each product and each location still counts as one call." ], "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": 52.6 } ], "editorialScores": { "ergonomics": 54, "maintenance": 36, "payments": 20, "reliability": 73, "schema": 67, "security": 48, "transparency": 20 }, "provenanceScore": 77 }, "connect": { "http": "curl --compressed \"https://api.weather.com/v3/wx/forecast/daily/3day?geocode=33.74,-84.39\u0026units=e\u0026language=en-US\u0026format=json\u0026apiKey=$TWC_API_KEY\"" }, "letme": { "capability": "https://letme.dev/weather.current", "tool": "https://letme.dev/weather-company" }, "area": "domain-data", "unitPrices": [ { "item": "Standard package, annual plan", "unit": "month", "usd": 500, "note": "1 million API calls a month" }, { "item": "Call on Standard, at the plan cap", "unit": "1k-requests", "usd": 0.5, "note": "$500 over 1 million calls" } ], "provenance": { "legalEntity": "The Weather Company, LLC", "domain": "weather.com", "domainRegistered": "1994-08-09", "endpointOnVendorDomain": true, "terms": "", "privacy": "https://weather.com/privacy/privacy-policy", "statusPage": "https://theweathercompanyapis.statuspage.io", "changelog": "", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "The privacy policy, effective 30 April 2026, names The Weather Company, LLC, 1001 Summit Boulevard NE, Brookhaven, GA 30319. Its section on data collection outside consumer products covers developer.weather.com enquiries and business customers.", "No terms document is given. The website terms of use (updated 16 April 2026) say they do not apply to the business data APIs, and the separate terms they refer to were not found on the pricing, trial or documentation pages.", "The API answers at api.weather.com and the documentation at developer.weather.com. The company site is www.weathercompany.com (registered 1998-03-24).", "weather.com/.well-known/security.txt gives a security contact and expires on 31 December 2026. www.weathercompany.com and developer.weather.com return 404 for the same path.", "RDAP for weather.com gives a registration date of 1994-08-09 and CSC Corporate Domains, Inc. as registrar.", "There is no central changelog. Each API reference has its own changelog section, most of them empty." ], "score": 77 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/weather-company.json", "live": { "slug": "weather-company", "probe": { "target": "https://api.weather.com", "method": "get", "lastAt": "2026-10-10T03:07:26.611816016Z", "lastOk": true, "lastStatus": 401, "lastMs": 22, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 24, "p95ms24h": 84, "samples24h": 249, "samples30d": 332, "days": [ { "date": "2026-10-08", "probes": 50, "ok": 50 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 32, "ok": 32 } ] }, "vendorStatus": { "page": "https://theweathercompanyapis.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-10T03:02:44.532450096Z" }, "securityTxt": { "url": "https://weather.com/.well-known/security.txt", "state": "valid", "expires": "2026-12-31T16:00:00.000Z", "checkedAt": "2026-10-09T15:39:54.557149652Z" }, "pages": [ { "url": "https://weather.com/privacy/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:47:21.960154609Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "15094935ecef" } ], "updatedAt": "2026-10-10T03:07:26.611816016Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Storm Glass AB", "b": "The Weather Company, LLC", "name": "Vendor" }, { "a": "https://api.stormglass.io/v2", "b": "https://api.weather.com", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Storm Glass AB's Terms and Conditions. The Free and Small plans are not for commercial use", "b": "Proprietary service. Use is under a content licensing agreement with The Weather Company, which is not published", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "no", "name": "llms.txt" }, { "a": "2026-02-26", "b": "2026-09-14", "name": "Last release" }, { "a": "no date given", "b": "no document linked", "name": "Terms last updated" }, { "a": "no date given", "b": "couldn't be read", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "", "name": "Arbitration or class-action waiver" } ], "faq": [ { "answer": "The Weather Company Data APIs scores 52.6 (D) on agent readiness against Stormglass API's 39.9 (E), and leads in 5 of 7 scored categories. Stormglass API leads on agent ergonomics and payments \u0026 pricing.", "question": "Which is better for AI agents, Stormglass API or The Weather Company Data APIs?" }, { "answer": "Both need an API key.", "question": "Do Stormglass API and The Weather Company Data APIs need an API key?" }, { "answer": "Yes. Stormglass API has a hosted endpoint at https://api.stormglass.io/v2 and The Weather Company Data APIs at https://api.weather.com.", "question": "Can an agent call Stormglass API and The Weather Company Data APIs without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Agent ergonomics, 65 against 54", "Payments \u0026 pricing, 25 against 20" ], "also": null, "goodFor": "Marine and coastal applications that want waves, swell, currents and tides beside ordinary weather, and callers who want to compare named models in one response.", "slug": "stormglass", "watchFor": "No OpenAPI file, llms.txt, official SDK or changelog was found. The docs are eleven Markdown pages" }, { "aheadOn": [ "Reliability, 73 against 34", "Schema \u0026 documentation, 67 against 40", "Maintenance \u0026 community, 36 against 15" ], "also": null, "goodFor": "A business that wants one contract for global forecasts, 4 km current conditions, alerts, imagery, aviation and deep history, and that can go through sales.", "slug": "weather-company", "watchFor": "No self-serve signup. The trial is requested through a form, is limited to enterprise customers, and the Buy now button opens a contact form." } ], "job": { "capability": "weather.forecast", "name": "Weather forecasts" }, "others": [ { "json": "https://www.anchorterminal.com/compare/accuweather-api-vs-weather-company.json", "title": "AccuWeather Core Weather API + MCP vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/accuweather-api-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/google-weather-api-vs-weather-company.json", "title": "Google Weather API (Maps Platform) vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/google-weather-api-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/met-office-datahub-vs-weather-company.json", "title": "Met Office Weather DataHub (Site Specific) vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/met-office-datahub-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/meteoblue-vs-weather-company.json", "title": "meteoblue Weather API vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/meteoblue-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/meteomatics-vs-weather-company.json", "title": "Meteomatics Weather API vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/meteomatics-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/nws-api-vs-weather-company.json", "title": "NOAA National Weather Service API (api.weather.gov) vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/nws-api-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/openweather-one-call-vs-weather-company.json", "title": "OpenWeather One Call API vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/openweather-one-call-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/pirate-weather-vs-weather-company.json", "title": "Pirate Weather vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/pirate-weather-vs-weather-company" }, { "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/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/weather-company-vs-weatherapi-com.json", "title": "The Weather Company Data APIs vs WeatherAPI.com", "url": "https://www.anchorterminal.com/compare/weather-company-vs-weatherapi-com" }, { "json": "https://www.anchorterminal.com/compare/weather-company-vs-weatherbit.json", "title": "The Weather Company Data APIs vs Weatherbit API", "url": "https://www.anchorterminal.com/compare/weather-company-vs-weatherbit" }, { "json": "https://www.anchorterminal.com/compare/weather-company-vs-xweather.json", "title": "The Weather Company Data APIs vs Xweather Weather API", "url": "https://www.anchorterminal.com/compare/weather-company-vs-xweather" }, { "json": "https://www.anchorterminal.com/compare/open-meteo-vs-stormglass.json", "title": "Open-Meteo vs Stormglass API", "url": "https://www.anchorterminal.com/compare/open-meteo-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/open-meteo-vs-weather-company.json", "title": "Open-Meteo vs The Weather Company Data APIs", "url": "https://www.anchorterminal.com/compare/open-meteo-vs-weather-company" }, { "json": "https://www.anchorterminal.com/compare/accuweather-api-vs-stormglass.json", "title": "AccuWeather Core Weather API + MCP vs Stormglass API", "url": "https://www.anchorterminal.com/compare/accuweather-api-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/google-weather-api-vs-stormglass.json", "title": "Google Weather API (Maps Platform) vs Stormglass API", "url": "https://www.anchorterminal.com/compare/google-weather-api-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/met-office-datahub-vs-stormglass.json", "title": "Met Office Weather DataHub (Site Specific) vs Stormglass API", "url": "https://www.anchorterminal.com/compare/met-office-datahub-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/meteoblue-vs-stormglass.json", "title": "meteoblue Weather API vs Stormglass API", "url": "https://www.anchorterminal.com/compare/meteoblue-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/meteomatics-vs-stormglass.json", "title": "Meteomatics Weather API vs Stormglass API", "url": "https://www.anchorterminal.com/compare/meteomatics-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/nws-api-vs-stormglass.json", "title": "NOAA National Weather Service API (api.weather.gov) vs Stormglass API", "url": "https://www.anchorterminal.com/compare/nws-api-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/openweather-one-call-vs-stormglass.json", "title": "OpenWeather One Call API vs Stormglass API", "url": "https://www.anchorterminal.com/compare/openweather-one-call-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/pirate-weather-vs-stormglass.json", "title": "Pirate Weather vs Stormglass API", "url": "https://www.anchorterminal.com/compare/pirate-weather-vs-stormglass" }, { "json": "https://www.anchorterminal.com/compare/stormglass-vs-tomorrow-io.json", "title": "Stormglass API vs Tomorrow.io Weather API", "url": "https://www.anchorterminal.com/compare/stormglass-vs-tomorrow-io" }, { "json": "https://www.anchorterminal.com/compare/stormglass-vs-visual-crossing.json", "title": "Stormglass API vs Visual Crossing Weather API", "url": "https://www.anchorterminal.com/compare/stormglass-vs-visual-crossing" }, { "json": "https://www.anchorterminal.com/compare/stormglass-vs-weatherapi-com.json", "title": "Stormglass API vs WeatherAPI.com", "url": "https://www.anchorterminal.com/compare/stormglass-vs-weatherapi-com" }, { "json": "https://www.anchorterminal.com/compare/stormglass-vs-weatherbit.json", "title": "Stormglass API vs Weatherbit API", "url": "https://www.anchorterminal.com/compare/stormglass-vs-weatherbit" }, { "json": "https://www.anchorterminal.com/compare/stormglass-vs-xweather.json", "title": "Stormglass API vs Xweather Weather API", "url": "https://www.anchorterminal.com/compare/stormglass-vs-xweather" } ], "scores": [ { "by": 39, "edge": "weather-company", "key": "reliability", "name": "Reliability", "stormglass": 34, "weather-company": 73, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 27, "edge": "weather-company", "key": "schema", "name": "Schema \u0026 documentation", "stormglass": 40, "weather-company": 67, "weight": 13 }, { "by": 11, "edge": "stormglass", "key": "ergonomics", "name": "Agent ergonomics", "stormglass": 65, "weather-company": 54, "weight": 13 }, { "by": 4, "edge": "weather-company", "key": "security", "name": "Security \u0026 auth", "stormglass": 44, "weather-company": 48, "weight": 14 }, { "by": 5, "edge": "stormglass", "key": "payments", "name": "Payments \u0026 pricing", "stormglass": 25, "weather-company": 20, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 21, "edge": "weather-company", "key": "maintenance", "name": "Maintenance \u0026 community", "stormglass": 15, "weather-company": 36, "weight": 7 }, { "by": 4, "edge": "weather-company", "key": "transparency", "name": "Transparency \u0026 trust", "stormglass": 45, "weather-company": 49, "weight": 7 } ], "summary": "The Weather Company Data APIs scores 52.6 (D) on agent readiness against Stormglass API's 39.9 (E), and leads in 5 of 7 scored categories. Stormglass API leads on agent ergonomics and payments \u0026 pricing. Both do weather forecasts.", "verdicts": { "stormglass": "A read-only weather and marine API with about 70 hourly parameters, per-source values from named national models, tide data and ERA5 history from 2014. No OpenAPI file, status page, SDK or security page was found, the free plan allows 10 requests a day, and the docs and FAQ disagree on the status code for a spent quota.", "weather-company": "A wide weather data API with 168 API references built from OpenAPI documents, global 4 km current conditions, hourly history from June 2015 and a status page with component history. Keys come only through a sales-reviewed trial or contract, travel only in the URL, and the terms that govern the API are not published." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/stormglass-vs-weather-company", "json": "https://www.anchorterminal.com/compare/stormglass-vs-weather-company.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/stormglass-vs-weather-company.md", "slim": "https://www.anchorterminal.com/compare/stormglass-vs-weather-company.min.md" }, "markdown": "The Weather Company Data APIs scores 52.6 (D) on agent readiness against Stormglass API's 39.9 (E), and leads in 5 of 7 scored categories. Stormglass API leads on agent ergonomics and payments \u0026 pricing. Both do weather forecasts.\n\n- Stormglass API: grade E, 39.9/100, rank #914 of 950. Markdown https://www.anchorterminal.com/tools/stormglass.md · JSON https://www.anchorterminal.com/api/v1/tools/stormglass.json\n- The Weather Company Data APIs: grade D, 52.6/100, rank #734 of 950. Markdown https://www.anchorterminal.com/tools/weather-company.md · JSON https://www.anchorterminal.com/api/v1/tools/weather-company.json\n- Best weather and climate data APIs for AI agents: https://www.anchorterminal.com/best/weather/index.md\n- All 120 weather comparisons: https://www.anchorterminal.com/compare/weather/index.md\n\n## Which one, for what\n\n### Stormglass API (E)\n\nGood for: Marine and coastal applications that want waves, swell, currents and tides beside ordinary weather, and callers who want to compare named models in one response.\n\nAhead on:\n- Agent ergonomics, 65 against 54\n- Payments \u0026 pricing, 25 against 20\n\nWatch for: No OpenAPI file, llms.txt, official SDK or changelog was found. The docs are eleven Markdown pages\n\n### The Weather Company Data APIs (D)\n\nGood for: A business that wants one contract for global forecasts, 4 km current conditions, alerts, imagery, aviation and deep history, and that can go through sales.\n\nAhead on:\n- Reliability, 73 against 34\n- Schema \u0026 documentation, 67 against 40\n- Maintenance \u0026 community, 36 against 15\n\nWatch for: No self-serve signup. The trial is requested through a form, is limited to enterprise customers, and the Buy now button opens a contact form.\n\n\n## Score by category\n\n| Category | Weight | Stormglass API | The Weather Company Data APIs | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 34 | 73 | The Weather Company Data APIs +39 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 40 | 67 | The Weather Company Data APIs +27 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 54 | Stormglass API +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 44 | 48 | The Weather Company Data APIs +4 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 25 | 20 | Stormglass API +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 15 | 36 | The Weather Company Data APIs +21 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 45 | 49 | The Weather Company Data APIs +4 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **39.9 · E** | **52.6 · D** | |\n\n## Facts side by side\n\n| Fact | Stormglass API | The Weather Company Data APIs |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Storm Glass AB | The Weather Company, LLC |\n| Hosted endpoint | `https://api.stormglass.io/v2` | `https://api.weather.com` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Storm Glass AB's Terms and Conditions. The Free and Small plans are not for commercial use | Proprietary service. Use is under a content licensing agreement with The Weather Company, which is not published |\n| Read-only variant documented | no | no |\n| llms.txt | no | no |\n| Last release | 2026-02-26 | 2026-09-14 |\n| Terms last updated | no date given | no document linked |\n| Privacy policy last updated | no date given | couldn't be read |\n| Customer content may train models | not found in the text | |\n| Terms restrict automated access | not found in the text | |\n| Terms restrict benchmarking | not found in the text | |\n| Terms or service can change without notice | yes | |\n| Arbitration or class-action waiver | yes | |\n\n## Verdicts\n\n**Stormglass API.** A read-only weather and marine API with about 70 hourly parameters, per-source values from named national models, tide data and ERA5 history from 2014. No OpenAPI file, status page, SDK or security page was found, the free plan allows 10 requests a day, and the docs and FAQ disagree on the status code for a spent quota.\n\n**The Weather Company Data APIs.** A wide weather data API with 168 API references built from OpenAPI documents, global 4 km current conditions, hourly history from June 2015 and a status page with component history. Keys come only through a sales-reviewed trial or contract, travel only in the URL, and the terms that govern the API are not published.\n\n## Before you call either\n\n### Stormglass API\n\n1. Send the key as `Authorization: KEY` with no Bearer prefix. A missing or wrong key returns 403 with `{\"errors\":{\"key\":\"API key is invalid\"}}`\n2. Always pass `source=sg` or a short source list on `/weather/point`. The default is every source, which multiplies the size of each hourly record\n3. Treat 402 as a spent daily quota, not a billing failure, and stop until the next day. Read `meta.requestCount` against `meta.dailyQuota` on each response\n4. Use `/historical/point` for past dates, at most 10 days a call and nothing newer than about 7 days. `/weather/point` looks back 14 days only\n5. Send and read all times in UTC. Tide sea levels are relative to the chosen datum (MSL by default) and are not water depth\n\n### The Weather Company Data APIs\n\n1. Send `units`, `language` and `format=json` with a location on every v3 call, plus `Accept-Encoding: gzip`, which the usage guide marks as required.\n2. Keep the key out of logs and client-side code, because it travels in the query string as `apiKey`.\n3. Treat a 401 as either a bad key, an endpoint outside the key's package or an exceeded limit, and treat a 204 as no data for the query.\n4. Each forecast duration (`3day` to `15day`) is a separate entitlement. Request only durations the contract covers.\n5. Use `/v3/aggcommon` to combine up to 10 products in one request. Each product and each location still counts as one call.\n\n## Questions\n\n### Which is better for AI agents, Stormglass API or The Weather Company Data APIs?\n\nThe Weather Company Data APIs scores 52.6 (D) on agent readiness against Stormglass API's 39.9 (E), and leads in 5 of 7 scored categories. Stormglass API leads on agent ergonomics and payments \u0026 pricing.\n\n### Do Stormglass API and The Weather Company Data APIs need an API key?\n\nBoth need an API key.\n\n### Can an agent call Stormglass API and The Weather Company Data APIs without installing anything?\n\nYes. Stormglass API has a hosted endpoint at https://api.stormglass.io/v2 and The Weather Company Data APIs at https://api.weather.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/stormglass-vs-weather-company.json, and with the fewest tokens: https://www.anchorterminal.com/compare/stormglass-vs-weather-company.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"stormglass\", \"b\": \"weather-company\"}`. From a terminal: `anchor compare stormglass weather-company`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/stormglass.json and https://www.anchorterminal.com/api/v1/tools/weather-company.json\n\n## Other comparisons with Stormglass API or The Weather Company Data APIs\n\n- [AccuWeather Core Weather API + MCP vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/accuweather-api-vs-weather-company.md)\n- [Google Weather API (Maps Platform) vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/google-weather-api-vs-weather-company.md)\n- [Met Office Weather DataHub (Site Specific) vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/met-office-datahub-vs-weather-company.md)\n- [meteoblue Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/meteoblue-vs-weather-company.md)\n- [Meteomatics Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/meteomatics-vs-weather-company.md)\n- [NOAA National Weather Service API (api.weather.gov) vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/nws-api-vs-weather-company.md)\n- [OpenWeather One Call API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/openweather-one-call-vs-weather-company.md)\n- [Pirate Weather vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/pirate-weather-vs-weather-company.md)\n- [Tomorrow.io Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/tomorrow-io-vs-weather-company.md)\n- [Visual Crossing Weather API vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/visual-crossing-vs-weather-company.md)\n- [The Weather Company Data APIs vs WeatherAPI.com](https://www.anchorterminal.com/compare/weather-company-vs-weatherapi-com.md)\n- [The Weather Company Data APIs vs Weatherbit API](https://www.anchorterminal.com/compare/weather-company-vs-weatherbit.md)\n- [The Weather Company Data APIs vs Xweather Weather API](https://www.anchorterminal.com/compare/weather-company-vs-xweather.md)\n- [Open-Meteo vs Stormglass API](https://www.anchorterminal.com/compare/open-meteo-vs-stormglass.md)\n- [Open-Meteo vs The Weather Company Data APIs](https://www.anchorterminal.com/compare/open-meteo-vs-weather-company.md)\n- [AccuWeather Core Weather API + MCP vs Stormglass API](https://www.anchorterminal.com/compare/accuweather-api-vs-stormglass.md)\n- [Google Weather API (Maps Platform) vs Stormglass API](https://www.anchorterminal.com/compare/google-weather-api-vs-stormglass.md)\n- [Met Office Weather DataHub (Site Specific) vs Stormglass API](https://www.anchorterminal.com/compare/met-office-datahub-vs-stormglass.md)\n- [meteoblue Weather API vs Stormglass API](https://www.anchorterminal.com/compare/meteoblue-vs-stormglass.md)\n- [Meteomatics Weather API vs Stormglass API](https://www.anchorterminal.com/compare/meteomatics-vs-stormglass.md)\n- [NOAA National Weather Service API (api.weather.gov) vs Stormglass API](https://www.anchorterminal.com/compare/nws-api-vs-stormglass.md)\n- [OpenWeather One Call API vs Stormglass API](https://www.anchorterminal.com/compare/openweather-one-call-vs-stormglass.md)\n- [Pirate Weather vs Stormglass API](https://www.anchorterminal.com/compare/pirate-weather-vs-stormglass.md)\n- [Stormglass API vs Tomorrow.io Weather API](https://www.anchorterminal.com/compare/stormglass-vs-tomorrow-io.md)\n- [Stormglass API vs Visual Crossing Weather API](https://www.anchorterminal.com/compare/stormglass-vs-visual-crossing.md)\n- [Stormglass API vs WeatherAPI.com](https://www.anchorterminal.com/compare/stormglass-vs-weatherapi-com.md)\n- [Stormglass API vs Weatherbit API](https://www.anchorterminal.com/compare/stormglass-vs-weatherbit.md)\n- [Stormglass API vs Xweather Weather API](https://www.anchorterminal.com/compare/stormglass-vs-xweather.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Stormglass API vs The Weather Company Data APIs", "url": "" } ], "description": "The Weather Company Data scores 52.6 (D) to Stormglass's 39.9 (E) for weather forecasts. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Stormglass API E 39.9", "The Weather Company Data APIs D 52.6", "scores" ], "h1": "Stormglass API vs The Weather Company Data APIs", "image": "https://www.anchorterminal.com/assets/og/compare-stormglass-vs-weather-company.png", "path": "/compare/stormglass-vs-weather-company", "published": "2026-10-01", "section": "tools", "title": "Stormglass vs The Weather Company Data for AI agents (2026)", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/stormglass-vs-weather-company" }, "tokens": { "markdown": 2900, "slim": 730 }, "version": 1 }