# Meteomatics Weather API vs NOAA National Weather Service API (api.weather.gov)

> Meteomatics Weather API and NOAA National Weather Service API (api.weather.gov) score within a point of each other on agent readiness, 49.6 (D) and 49.6 (D). NOAA National Weather Service API (api.weather.gov) leads on payments & pricing. Both do weather current. Category…

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- Updated: 2026-10-08

Meteomatics Weather API and NOAA National Weather Service API (api.weather.gov) score within a point of each other on agent readiness, 49.6 (D) and 49.6 (D). NOAA National Weather Service API (api.weather.gov) leads on payments & pricing. 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
- NOAA National Weather Service API (api.weather.gov): grade D, 49.6/100, rank #605 of 722. Markdown https://www.anchorterminal.com/tools/nws-api.md · JSON https://www.anchorterminal.com/api/v1/tools/nws-api.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:
- Reliability, 34 against 25
- Agent ergonomics, 80 against 66
- Maintenance & community, 42 against 8

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

### NOAA National Weather Service API (api.weather.gov) (D)

Good for: The authoritative US forecast and alert feed, best for alerting and US-only agents that can tolerate a government service's availability.

Ahead on:
- Payments & pricing, 60 against 0

Also in its favour:
- No key needed to call it

Watch for: US and territories only


## Score by category

| Category | Weight | Meteomatics Weather API | NOAA National Weather Service API (api.weather.gov) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 34 | 25 | Meteomatics Weather API +9 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 71 | 67 | Meteomatics Weather API +4 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 66 | Meteomatics Weather API +14 |
| Security & auth | 14% (17.5 this run) | 54 | 53 | Meteomatics Weather API +1 |
| Payments & pricing | 10% (12.5 this run) | 0 | 60 | NOAA National Weather Service API (api.weather.gov) +60 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 42 | 8 | Meteomatics Weather API +34 |
| Transparency & trust | 7% (8.8 this run) | 59 | 63 | NOAA National Weather Service API (api.weather.gov) +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.6 · D** | **49.6 · D** | |

## Facts side by side

| Fact | Meteomatics Weather API | NOAA National Weather Service API (api.weather.gov) |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Meteomatics AG | National Weather Service |
| Hosted endpoint | `https://api.meteomatics.com` | `https://api.weather.gov` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | None |
| Pricing | Paid | Free |
| x402 | no | no |
| Licence | Proprietary service under Meteomatics' general terms and conditions. The Python connector on GitHub is MIT | Public domain (data) |
| Tools exposed | 9 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-08-24 | 2026-03-19 |
| 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 | not found in the text |
| 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 | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 56 stars, 16k PyPI/wk | 310 stars |
| Agent reviews | none | 4.5/5 (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.

**NOAA National Weather Service API (api.weather.gov).** Free, no key and no account, with public domain data. US and territories only.

## 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

### NOAA National Weather Service API (api.weather.gov)

1. Set User-Agent to your app name and a contact email or the request is refused with 403
2. Cache the /points response per coordinate. The office and grid rarely change
3. Round coordinates to four decimal places. More precision returns an error
4. Don't add cache-busting query parameters. Unknown parameters return 400
5. Back off about five seconds after a throttled request and reuse the last good response

## Questions

### Which is better for AI agents, Meteomatics Weather API or NOAA National Weather Service API (api.weather.gov)?

Meteomatics Weather API and NOAA National Weather Service API (api.weather.gov) score within a point of each other on agent readiness, 49.6 (D) and 49.6 (D). NOAA National Weather Service API (api.weather.gov) leads on payments & pricing.

### Do Meteomatics Weather API and NOAA National Weather Service API (api.weather.gov) need an API key?

Meteomatics Weather API takes an API key or an OAuth sign-in. NOAA National Weather Service API (api.weather.gov) needs no key.

### Can an agent call Meteomatics Weather API and NOAA National Weather Service API (api.weather.gov) without installing anything?

Yes. Meteomatics Weather API has a hosted endpoint at https://api.meteomatics.com and NOAA National Weather Service API (api.weather.gov) at https://api.weather.gov.


## For agents

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

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