# AccuWeather Core Weather API + MCP vs Weatherbit API

> Weatherbit API scores 57.7 (C) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 6 of 7 scored categories. Both do weather current. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/accuweather-api-vs-weatherbit
- Markdown: https://www.anchorterminal.com/compare/accuweather-api-vs-weatherbit.md (~2,600 tokens)
- Slim: https://www.anchorterminal.com/compare/accuweather-api-vs-weatherbit.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/accuweather-api-vs-weatherbit.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

Weatherbit API scores 57.7 (C) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 6 of 7 scored categories. 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
- Weatherbit API: grade C, 57.7/100, rank #466 of 722. Markdown https://www.anchorterminal.com/tools/weatherbit.md · JSON https://www.anchorterminal.com/api/v1/tools/weatherbit.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.

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

### Weatherbit API (C)

Good for: An application that needs forecasts plus specialised datasets (air quality, lightning, soil and degree days) from one paid subscription, queried by coordinates.

Ahead on:
- Reliability, 91 against 65
- Schema & documentation, 72 against 60
- Payments & pricing, 30 against 25
- Maintenance & community, 21 against 13
- Transparency & trust, 63 against 55

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

Watch for: The key is accepted only as the `key` query parameter, and the spec lists plain http as a scheme


## Score by category

| Category | Weight | AccuWeather Core Weather API + MCP | Weatherbit API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 65 | 91 | Weatherbit API +26 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 72 | Weatherbit API +12 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 61 | Weatherbit API +1 |
| Security & auth | 14% (17.5 this run) | 39 | 39 | even |
| Payments & pricing | 10% (12.5 this run) | 25 | 30 | Weatherbit API +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 13 | 21 | Weatherbit API +8 |
| Transparency & trust | 7% (8.8 this run) | 55 | 63 | Weatherbit API +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **48.4 · D** | **57.7 · C** | |

## Facts side by side

| Fact | AccuWeather Core Weather API + MCP | Weatherbit API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | AccuWeather | Weatherbit LLC |
| Hosted endpoint | `https://dataservice.accuweather.com` | `https://api.weatherbit.io/v2.0` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | none | Proprietary service under Weatherbit's terms of service. The free plan's data is under a Creative Commons non-commercial licence. The Python SDK is MIT |
| Tools exposed | 26 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | none | 2025-08-01 |
| Terms last updated | 2026-04-28 | 2025-05-01 |
| Privacy policy last updated | couldn't be read | 2023-12-26 |
| 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 | 78 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.

**Weatherbit API.** A read-only weather API with a Swagger 2.0 spec, quota headers on every response and a status page showing 100 per cent on three API monitors over 90 days. The key travels only in the query string, the free plan allows 50 requests a day for non-commercial use, and the last dated API announcement is 1 August 2025.

## 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

### Weatherbit API

1. Pass lat and lon. City, postal code and station lookups are accepted, but the docs recommend coordinates and mark station ID as use with caution
2. Read X-RateLimit-Remaining and X-RateLimit-Reset on each response. Daily quotas reset at 00:00 UTC and a spent quota returns 429 until then
3. Treat HTTP 204 with an empty body as no data found, not as an error
4. Split historical requests into ranges of one month or less. History needs the Plus plan or higher and has its own daily quota
5. Keep the key out of logs. It is part of the URL on every call, so always use https://api.weatherbit.io/v2.0

## Questions

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

Weatherbit API scores 57.7 (C) on agent readiness against AccuWeather Core Weather API + MCP's 48.4 (D), and leads in 6 of 7 scored categories.

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

Both need an API key.

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

Yes. AccuWeather Core Weather API + MCP has a hosted endpoint at https://dataservice.accuweather.com and Weatherbit API at https://api.weatherbit.io/v2.0.


## For agents

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

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