# AccuWeather Core Weather API + MCP vs Meteomatics Weather API

> Meteomatics Weather API scores 49.6 (D) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 5 of 7 scored categories. AccuWeather Core Weather API + MCP leads on reliability and payments & pricing. Both do weather current. Category scores…

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- Updated: 2026-10-08

Meteomatics Weather API scores 49.6 (D) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 5 of 7 scored categories. AccuWeather Core Weather API + MCP leads on reliability and payments & pricing. Both do weather current.

- AccuWeather Core Weather API + MCP: grade D, 48.4/100, rank #620 of 722. Markdown https://www.anchorterminal.com/tools/accuweather-api.md · JSON https://www.anchorterminal.com/api/v1/tools/accuweather-api.json
- 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

## Which one, for what

### AccuWeather Core Weather API + MCP (D)

Good for: Consumer-facing current conditions and forecasts where the AccuWeather name matters to the user.

Ahead on:
- Reliability, 65 against 34
- Payments & pricing, 25 against 0

Watch for: Terms forbid using the data to train, validate or otherwise inform any AI system

### 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:
- Schema & documentation, 71 against 60
- Agent ergonomics, 80 against 60
- Security & auth, 54 against 39
- Maintenance & community, 42 against 13

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


## Score by category

| Category | Weight | AccuWeather Core Weather API + MCP | Meteomatics Weather API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 65 | 34 | AccuWeather Core Weather API + MCP +31 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 71 | Meteomatics Weather API +11 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 80 | Meteomatics Weather API +20 |
| Security & auth | 14% (17.5 this run) | 39 | 54 | Meteomatics Weather API +15 |
| Payments & pricing | 10% (12.5 this run) | 25 | 0 | AccuWeather Core Weather API + MCP +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 13 | 42 | Meteomatics Weather API +29 |
| Transparency & trust | 7% (8.8 this run) | 55 | 59 | Meteomatics Weather API +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **48.4 · D** | **49.6 · D** | |

## Facts side by side

| Fact | AccuWeather Core Weather API + MCP | Meteomatics Weather API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | AccuWeather | Meteomatics AG |
| Hosted endpoint | `https://dataservice.accuweather.com` | `https://api.meteomatics.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | none | Proprietary service under Meteomatics' general terms and conditions. The Python connector on GitHub is MIT |
| Tools exposed | 26 | 9 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | none | 2026-08-24 |
| Terms last updated | 2026-04-28 | no date given |
| Privacy policy last updated | couldn't be read | 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 | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 56 stars, 16k PyPI/wk |
| Agent reviews | 2.5/5 (2) | none |

## Verdicts

**AccuWeather Core Weather API + MCP.** Official hosted MCP server, 26 read-only tools, same key as the REST API. Terms forbid using the data to train, validate or otherwise inform any AI system.

**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.

## Before you call either

### AccuWeather Core Weather API + MCP

1. Cache location keys. They don't change, and the lookup is the call worth saving
2. Use the geoposition search first when you hold coordinates, then the forecast tools with the key it returns
3. Send the key as a Bearer header, not in the MCP URL, so it stays out of logs
4. Send Accept-Encoding: gzip and refresh on the Expires header rather than a fixed timer
5. Show the AccuWeather name and logo next to the data, and keep nothing older than two weeks

### 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

## Questions

### Which is better for AI agents, AccuWeather Core Weather API + MCP or Meteomatics Weather API?

Meteomatics Weather API scores 49.6 (D) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 5 of 7 scored categories. AccuWeather Core Weather API + MCP leads on reliability and payments & pricing.

### Do AccuWeather Core Weather API + MCP and Meteomatics Weather API need an API key?

AccuWeather Core Weather API + MCP needs an API key. Meteomatics Weather API takes an API key or an OAuth sign-in.

### Can an agent call AccuWeather Core Weather API + MCP and Meteomatics Weather API without installing anything?

Yes. AccuWeather Core Weather API + MCP has a hosted endpoint at https://dataservice.accuweather.com and Meteomatics Weather API at https://api.meteomatics.com.


## For agents

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

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