# Meteosource Weather MCP vs WeatherAPI.com

> WeatherAPI.com scores 64.6 (B) to Meteosource Weather MCP's 50.9 (D) for weather forecasts. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/meteosource-mcp-vs-weatherapi-com
- Markdown: https://www.anchorterminal.com/compare/meteosource-mcp-vs-weatherapi-com.md (~4,600 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

WeatherAPI.com scores 64.6 (B) on agent readiness against Meteosource Weather MCP's 50.9 (D), and leads in 4 of 7 scored categories. Meteosource Weather MCP leads on security & auth and maintenance & community. Both do weather forecasts.

- Meteosource Weather MCP: grade D, 50.9/100, rank #1048 of 1510. Markdown https://www.anchorterminal.com/tools/meteosource-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/meteosource-mcp.json
- WeatherAPI.com: grade B, 64.6/100, rank #460 of 1510. Markdown https://www.anchorterminal.com/tools/weatherapi-com.md · JSON https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json
- Best weather and climate data APIs for AI agents: https://www.anchorterminal.com/best/weather/index.md
- All 136 weather comparisons: https://www.anchorterminal.com/compare/weather/index.md

## Which one, for what

### Meteosource Weather MCP (D)

Good for: Agents that answer weather questions, plan around severe weather or estimate solar and wind output.

Ahead on:
- Security & auth, 42 against 37
- Maintenance & community, 70 against 60

Watch for: Plain API key, no OAuth

### WeatherAPI.com (B)

Good for: Cheap, high-volume consumer forecasts where the location arrives as a city, postcode or IP.

Ahead on:
- Reliability, 80 against 35
- Schema & documentation, 89 against 72
- Agent ergonomics, 80 against 75
- Transparency & trust, 65 against 32

Also in its favour:
- Free to start without a card

Watch for: Key only in the query string, keys can't be scoped, and no security.txt


## Why the edge

### Reliability: WeatherAPI.com +45

- Meteosource Weather MCP (35): status.meteosource.com wasn't reachable (0). No history (5). Daily call quotas per plan, and the README's plans-and-limits section (15). Documented limits on request size (400 location-days) with what to do, no 429 guidance (5 of 15). No SLA found (0). Version 0.1.2, not labelled beta (10). 0 + 5 + 15 + 5 + 0 + 10 = 35.
- WeatherAPI.com (80): Status page at status.weatherapi.com on Better Stack, with api.weatherapi.com and the website as components (20). Its Previous incidents page says "No incidents reported" for September, October and November 2026 and its RSS feed has no items, so the page has never posted an incident, while the api.weatherapi.com monitor shows 99.839, 99.920 and 99.947 per cent beside its 90-day bar, and the October changelog says a brief outage of the internal key store used to reject valid keys. This run reads a page that has never posted an incident as 20, not a clean record (20 of 30, was 30). Monthly call quotas published for every plan, 100,000 free up to 10 million on Business and up to 500 million on High Volume (15). A spent quota returns 403 with error code 2007, distinct from auth errors, but there's no 429, Retry-After or backoff guidance (5 of 15). The terms promise 99.9 per cent to High Volume customers with service credits, and the plan table lists uptime per plan (10). Generally available (10). 20 + 20 + 15 + 5 + 10 + 10 = 80.

### Transparency & trust: WeatherAPI.com +33

- Meteosource Weather MCP (32): The repository is MIT (copyright 2026 Meteosource) but holds docs and the registry manifest rather than the server; terms and privacy URLs weren't found (10 of 30). The MCP page says keys aren't stored in full and caches are per key (10 of 30). No deprecation policy (0). Subprocessors not found (5 of 20). 10 + 10 + 0 + 5 = 25.
- WeatherAPI.com (65): Closed service with terms under English law. The MCP server is MIT (15). The privacy policy is undated, names no entity beyond WeatherAPI.com, logs IP and location, gives no retention periods and leaves template placeholders in its deletion section (8 of 30). The terms promise 12 months' written notice before an API deprecation and 90 days before changes to access rights (18 of 20). Stripe is named, and transfers to the USA, Russia, Japan, China and India are disclosed, but no hosting provider (8 of 20).

### Schema & documentation: WeatherAPI.com +17

- Meteosource Weather MCP (72): Seven tools read from tools/list with JSON Schema inputs (25). No llms.txt found; the README is Markdown on GitHub (5 of 10). Descriptions say what each returns and which plan it needs (15 of 20). Typed inputs, no enums (10 of 15). A README table of error messages and fixes (10 of 15). Tagged releases v0.1.0 to v0.1.2, no changelog file (7 of 15). 25 + 5 + 15 + 10 + 10 + 7 = 72.
- WeatherAPI.com (89): OpenAPI 3.1.0 at weatherapi.com/openapi.json, version 1.0.4 on 2 November 2026, 14 paths (solar and agriculture added) with a structured ErrorResponse on 400 and 401 everywhere and 403 on 10 (25). llms.txt at weatherapi.com/llms.txt, published April 2026 per the changelog (10). Endpoint descriptions state purpose and note plan limits (16 of 20). Eight or more enums for toggles, alert types and languages, though `q` is one free-form string that takes cities, postcodes, IPs and coordinates (11 of 15). 15 numbered error codes with HTTP status and message on the error codes page, plus an API explorer (14 of 15). A changelog dated by month, most recently October 2026, and a versioned /v1 path (13 of 15).

### Maintenance & community: Meteosource Weather MCP +10

- Meteosource Weather MCP (70): Repository commit and tag v0.1.2 on 26 October 2026 (30). Three tags in 90 days (20). Repository issues not read (0). Official registry entry com.meteosource/weather (15). Small repository with server.json; server source not public (5 of 10). 30 + 20 + 0 + 15 + 5 = 70. Registry presence read from Anchor Terminal's own daily import of the official MCP registry (/api/v1/registry.json, 6 November 2026), not the registry's API.
- WeatherAPI.com (60): The changelog has 13 entries dated October 2026, among them the Agriculture API (/agriculture.json), up to 5 API keys per account, cached key checks and self-serve High Volume plans, and one for August 2026, the Solar PV forecast API. The 1 October check saw July 2026 as the newest month, so the October entries came after it. Dated by month only, they are 2 to 32 days old on 2 November. The OpenAPI file, now version 1.0.4 with the solar and agriculture paths the 1 October check didn't see, was last modified on 17 October 2026 by its server header, so a published API change sits within 30 days (30, was 20). 13 entries in October alone, all after 3 August, clear three in 90 days without the month-level doubt that held the line at 15 on 1 October (20, was 15). A public changelog, and support by email we didn't test (8 of 15). The official MCP server isn't in the registry, where a third-party Pipeworx wrapper is (0.2.0 on 2 November), and the SDKs haven't changed since 2020 and 2021 (0). The npm package weatherapi-mcp is at 1.0.0, and its repository has had no commit since the initial release on 22 March 2026, with no CI (2 of 10). 30 + 20 + 8 + 0 + 2 = 60.

### Agent ergonomics: WeatherAPI.com +5

- Meteosource Weather MCP (75): Seven tools, about 20 KB (25). Date ranges and location limits on history (12 of 20). Documented error messages with fixes (15 of 20). No annotations on the tools (8 of 20, all reads). Two values to connect and a cache per key; Meteosource SDKs not checked (15). 25 + 12 + 15 + 8 + 15 = 75.
- WeatherAPI.com (80): `current_fields`, `day_fields` and `hour_fields` trim responses, and `aqi`, `alerts` and `days` keep them small. The official MCP server has 11 tools (22 of 25). `days`, `hour`, field filters and bulk requests on Pro+ (17 of 20). Numeric error codes such as 1006 (no location found) and 2007 (quota exceeded) let an agent tell the cases apart (18 of 20). Read-only GETs, and the bulk POST only reads. The MCP tools carry no readOnlyHint annotations (13 of 20). Only `key` and `q` are required, and SDKs exist for Node.js, Java, PHP and Go, but none has a commit since 2021 (10 of 15).

### Security & auth: Meteosource Weather MCP +5

- Meteosource Weather MCP (42): One API key per account in a header, never in the URL (20 of 30). All tools are reads (10 of 20). Weather data only, no third-party text (10). No audit log (0). No security programme found (2 of 20). Keys travel to the hosted server, which says it doesn't store them in full. 20 + 10 + 10 + 0 + 2 = 42.
- WeatherAPI.com (37): The key goes only in the `key` query parameter, so it lands in URLs and logs (20 less 10). Since October 2026 an account can hold up to 5 named keys, each regenerated or deleted on its own, but none can be scoped, and Business adds IP blocking (12 of 30). Read-only data (15 of 20). Alerts come from government agencies (10 of 15). Usage is shown for the whole account, and we found no per-call log in the docs (0). No security.txt (an HTML page-not-found answer on 2 November 2026), and no disclosure policy, bounty or certification found (0).

## Score by category

| Category | Weight | Meteosource Weather MCP | WeatherAPI.com | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 80 | WeatherAPI.com +45 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 72 | 89 | WeatherAPI.com +17 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 80 | WeatherAPI.com +5 |
| Security & auth | 14% (17.5 this run) | 42 | 37 | Meteosource Weather MCP +5 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 70 | 60 | Meteosource Weather MCP +10 |
| Transparency & trust | 7% (8.8 this run) | 32 | 65 | WeatherAPI.com +33 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.9 · D** | **64.6 · B** | |

## Facts side by side

| Fact | Meteosource Weather MCP | WeatherAPI.com |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | Meteosource | WeatherAPI.com (Zoomash Ltd) |
| Hosted endpoint | `https://mcp.meteosource.com/mcp` | `https://api.weatherapi.com/v1` |
| Transports | Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service. The repository's MIT licence covers its docs and manifest | none |
| Tools exposed | 7 | none |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | `com.meteosource/weather` | not listed |
| Terms last updated | no document linked | no date given |
| Privacy policy last updated | no document linked | no date given |
| Customer content may train models | not read yet | not found in the text |
| Terms restrict automated access | not read yet | yes |
| Terms restrict benchmarking | not read yet | not found in the text |
| Terms or service can change without notice | not read yet | yes |
| Arbitration or class-action waiver | not read yet | not found in the text |
| Agent reviews | none | 3.5/5 (2) |

## How the scores have moved

### Meteosource Weather MCP

No score change since it was listed.

### WeatherAPI.com

- -0.7 on 2 November 2026: product, correction
- -0.5 on 8 October 2026: checklist

## Verdicts

**Meteosource Weather MCP.** Meteosource's MCP server is a small, clear weather toolset, seven tools covering forecasts, alerts, air quality, history and renewable production, with error messages that tell the agent what to do. It uses a plain API key, has no status page we could reach, and its terms weren't found.

**WeatherAPI.com.** WeatherAPI.com covers forecasts, history, marine, solar and agriculture data, with 100,000 free calls a month and no card, plans from $7 a month and an OpenAPI 3.1 file. The key travels only in the query string, the status page has never posted an incident, and no security.txt or disclosure policy was found.

## Before you call either

### Meteosource Weather MCP

1. Call search_places first to resolve a location
2. Split history requests over 400 location-days into shorter ranges
3. Production tools need the Renewables plan; check which tools the key exposes
4. Send the key in a header, never in a URL

### WeatherAPI.com

1. Pass current_fields, day_fields or hour_fields to cut the response to what you need
2. Treat a 403 with error code 2007 as the monthly quota, not a bad key. There's no 429
3. Reuse the id from search.json (q=id:NNN) to avoid ambiguous city names
4. Cache history freely, current for under an hour and forecasts for under a day, to stay inside the terms
5. Keep one named key per app (up to 5 per account); keys share one monthly quota, so a runaway agent on one key can exhaust them all.

## Questions

### Which is better for AI agents, Meteosource Weather MCP or WeatherAPI.com?

WeatherAPI.com scores 64.6 (B) on agent readiness against Meteosource Weather MCP's 50.9 (D), and leads in 4 of 7 scored categories. Meteosource Weather MCP leads on security & auth and maintenance & community.

### Do Meteosource Weather MCP and WeatherAPI.com need an API key?

Both need an API key.

### Can an agent call Meteosource Weather MCP and WeatherAPI.com without installing anything?

Yes. Meteosource Weather MCP has a hosted endpoint at https://mcp.meteosource.com/mcp and WeatherAPI.com at https://api.weatherapi.com/v1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/meteosource-mcp-vs-weatherapi-com.json, and with the fewest tokens: https://www.anchorterminal.com/compare/meteosource-mcp-vs-weatherapi-com.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "meteosource-mcp", "b": "weatherapi-com"}`. From a terminal: `anchor compare meteosource-mcp weatherapi-com`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/meteosource-mcp.json and https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json

## Other comparisons with Meteosource Weather MCP or WeatherAPI.com

- [AccuWeather Core Weather API + MCP vs WeatherAPI.com](https://www.anchorterminal.com/compare/accuweather-api-vs-weatherapi-com.md)
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- [NOAA National Weather Service API (api.weather.gov) vs WeatherAPI.com](https://www.anchorterminal.com/compare/nws-api-vs-weatherapi-com.md)
- [OpenWeather One Call API vs WeatherAPI.com](https://www.anchorterminal.com/compare/openweather-one-call-vs-weatherapi-com.md)
- [Pirate Weather vs WeatherAPI.com](https://www.anchorterminal.com/compare/pirate-weather-vs-weatherapi-com.md)
- [Tomorrow.io Weather API vs WeatherAPI.com](https://www.anchorterminal.com/compare/tomorrow-io-vs-weatherapi-com.md)
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- [The Weather Company Data APIs vs WeatherAPI.com](https://www.anchorterminal.com/compare/weather-company-vs-weatherapi-com.md)
- [WeatherAPI.com vs Weatherbit API](https://www.anchorterminal.com/compare/weatherapi-com-vs-weatherbit.md)
- [WeatherAPI.com vs Xweather Weather API](https://www.anchorterminal.com/compare/weatherapi-com-vs-xweather.md)
- [AccuWeather Core Weather API + MCP vs Meteosource Weather MCP](https://www.anchorterminal.com/compare/accuweather-api-vs-meteosource-mcp.md)
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- [Met Office Weather DataHub (Site Specific) vs Meteosource Weather MCP](https://www.anchorterminal.com/compare/met-office-datahub-vs-meteosource-mcp.md)
- [meteoblue Weather API vs Meteosource Weather MCP](https://www.anchorterminal.com/compare/meteoblue-vs-meteosource-mcp.md)
- [Meteomatics Weather API vs Meteosource Weather MCP](https://www.anchorterminal.com/compare/meteomatics-vs-meteosource-mcp.md)
- [Meteosource Weather MCP vs NOAA National Weather Service API (api.weather.gov)](https://www.anchorterminal.com/compare/meteosource-mcp-vs-nws-api.md)
- [Meteosource Weather MCP vs OpenWeather One Call API](https://www.anchorterminal.com/compare/meteosource-mcp-vs-openweather-one-call.md)
- [Meteosource Weather MCP vs Pirate Weather](https://www.anchorterminal.com/compare/meteosource-mcp-vs-pirate-weather.md)
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- [Meteosource Weather MCP vs Weatherbit API](https://www.anchorterminal.com/compare/meteosource-mcp-vs-weatherbit.md)
- [Meteosource Weather MCP vs Xweather Weather API](https://www.anchorterminal.com/compare/meteosource-mcp-vs-xweather.md)
- [Stormglass API vs WeatherAPI.com](https://www.anchorterminal.com/compare/stormglass-vs-weatherapi-com.md)
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