# Meteomatics Weather API vs WeatherAPI.com

> WeatherAPI.com scores 65.3 (B) on agent readiness against Meteomatics Weather API's 49.6 (D), and leads in 5 of 7 scored categories. Meteomatics Weather API leads on security & auth. Both do weather current. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/meteomatics-vs-weatherapi-com
- Markdown: https://www.anchorterminal.com/compare/meteomatics-vs-weatherapi-com.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/meteomatics-vs-weatherapi-com.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/meteomatics-vs-weatherapi-com.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

WeatherAPI.com scores 65.3 (B) on agent readiness against Meteomatics Weather API's 49.6 (D), and leads in 5 of 7 scored categories. Meteomatics Weather API leads on security & auth. Both do weather current.

- Meteomatics Weather API: grade D, 49.6/100, rank #606 of 722. Markdown https://www.anchorterminal.com/tools/meteomatics.md · JSON https://www.anchorterminal.com/api/v1/tools/meteomatics.json
- WeatherAPI.com: grade B, 65.3/100, rank #260 of 722. Markdown https://www.anchorterminal.com/tools/weatherapi-com.md · JSON https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json

## Which one, for what

### Meteomatics Weather API (D)

Good for: Companies in energy, aviation, insurance and logistics that need many models, long history, polygon and route queries and an SLA, and will buy by contract.

Ahead on:
- Security & auth, 54 against 37

Watch for: No public price, free tier or self-serve signup found. Credentials arrive by email after a sales conversation

### WeatherAPI.com (B)

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

Ahead on:
- Reliability, 90 against 34
- Schema & documentation, 89 against 71
- Payments & pricing, 30 against 0
- Transparency & trust, 65 against 59

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

Watch for: Key only in the query string, and no security.txt


## Score by category

| Category | Weight | Meteomatics Weather API | WeatherAPI.com | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 34 | 90 | WeatherAPI.com +56 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 71 | 89 | WeatherAPI.com +18 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 80 | even |
| Security & auth | 14% (17.5 this run) | 54 | 37 | Meteomatics Weather API +17 |
| Payments & pricing | 10% (12.5 this run) | 0 | 30 | WeatherAPI.com +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 42 | 45 | WeatherAPI.com +3 |
| Transparency & trust | 7% (8.8 this run) | 59 | 65 | WeatherAPI.com +6 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.6 · D** | **65.3 · B** | |

## Facts side by side

| Fact | Meteomatics Weather API | WeatherAPI.com |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Meteomatics AG | WeatherAPI.com (Zoomash Ltd) |
| Hosted endpoint | `https://api.meteomatics.com` | `https://api.weatherapi.com/v1` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Meteomatics' general terms and conditions. The Python connector on GitHub is MIT | none |
| Tools exposed | 9 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-08-24 | none |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | no date given | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 56 stars, 16k PyPI/wk | none |
| Agent reviews | none | 3.5/5 (2) |

## Verdicts

**Meteomatics Weather API.** A public OpenAPI file, a hosted MCP server whose nine tools are all marked read-only, a published SLA with compensation and ISO 27001 certification suit company use. Access needs a sales contract, with no public price, free tier or self-serve signup found, no status page, and REST calls that authenticate with a username and password.

**WeatherAPI.com.** 3 million calls for $7 a month, and 100,000 a month free with no card. Key only in the query string, and no security.txt.

## Before you call either

### Meteomatics Weather API

1. Ask the account owner for credentials first. There is no signup, and both the REST API and the MCP server need a Meteomatics account with API access
2. Build REST URLs as validdatetime/parameters/location/format, for example `2026-10-08T00:00:00Z/t_2m:C/52.52,13.40/json`. Parameter names carry their unit after a colon
3. Keep each query to 10 locations and 10 parameters unless the contract says otherwise, and use POST when a GET URL passes 2,000 characters
4. Send credentials or the token in the `Authorization` header. Avoid the documented `access_token` query parameter, which puts the token in URLs and logs
5. Read `/user_stats_json` before a large job. It reports queries sent and the contract's limits, and 429 means a limit is spent
6. Treat reserved values such as -888 and -999 as invalid or missing data, and shrink the request when a 408 arrives after the 300-second timeout

### 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. Use https://api.weatherapi.com/v1. The docs still show an http:// base URL

## Questions

### Which is better for AI agents, Meteomatics Weather API or WeatherAPI.com?

WeatherAPI.com scores 65.3 (B) on agent readiness against Meteomatics Weather API's 49.6 (D), and leads in 5 of 7 scored categories. Meteomatics Weather API leads on security & auth.

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

Meteomatics Weather API takes an API key or an OAuth sign-in. WeatherAPI.com needs an API key.

### Can an agent call Meteomatics Weather API and WeatherAPI.com without installing anything?

Yes. Meteomatics Weather API has a hosted endpoint at https://api.meteomatics.com and WeatherAPI.com at https://api.weatherapi.com/v1.


## For agents

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

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