# Visual Crossing Weather API vs Weatherbit API

> Visual Crossing Weather API scores 59.9 (C) on agent readiness against Weatherbit API's 57.7 (C), and leads in 5 of 7 scored categories. Weatherbit API leads on reliability and transparency & trust. Both do weather current. Category scores, facts, verdicts and agent notes side…

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- Updated: 2026-10-08

Visual Crossing Weather API scores 59.9 (C) on agent readiness against Weatherbit API's 57.7 (C), and leads in 5 of 7 scored categories. Weatherbit API leads on reliability and transparency & trust. Both do weather current.

- Visual Crossing Weather API: grade C, 59.9/100, rank #417 of 722. Markdown https://www.anchorterminal.com/tools/visual-crossing.md · JSON https://www.anchorterminal.com/api/v1/tools/visual-crossing.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

### Visual Crossing Weather API (C)

Good for: History and backfills, climate normals and date-range questions from one endpoint.

Ahead on:
- Agent ergonomics, 78 against 61
- Payments & pricing, 40 against 30
- Maintenance & community, 58 against 21

Watch for: Key only in the query string on the REST API

### 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 66
- Transparency & trust, 63 against 56

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 | Visual Crossing Weather API | Weatherbit API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 66 | 91 | Weatherbit API +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 74 | 72 | Visual Crossing Weather API +2 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 61 | Visual Crossing Weather API +17 |
| Security & auth | 14% (17.5 this run) | 40 | 39 | Visual Crossing Weather API +1 |
| Payments & pricing | 10% (12.5 this run) | 40 | 30 | Visual Crossing Weather API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 58 | 21 | Visual Crossing Weather API +37 |
| Transparency & trust | 7% (8.8 this run) | 56 | 63 | Weatherbit API +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **59.9 · C** | **57.7 · C** | |

## Facts side by side

| Fact | Visual Crossing Weather API | Weatherbit API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Visual Crossing | Weatherbit LLC |
| Hosted endpoint | `https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline` | `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 | 1 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | none | 2025-08-01 |
| Terms last updated | 2023-01-01 | 2025-05-01 |
| Privacy policy last updated | no date given | 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 | 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 | none | 78 PyPI/wk |
| Agent reviews | 4/5 (2) | none |

## Verdicts

**Visual Crossing Weather API.** History from 1970, current conditions and a 15-day forecast from one endpoint. Key only in the query string on the REST API.

**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

### Visual Crossing Weather API

1. Always pass include= and elements=. A bare call returns days, hours and current for every element and burns records
2. Count records before a backfill. Hourly data is 24 records a day, so a year for one place is 8,760
3. Pass unitGroup=metric. The default is US units
4. Use the MCP server with X-VC-API-Key rather than pasting the key into a URL
5. Keep to one request at a time on Free and Professional. A second concurrent job returns 429

### 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, Visual Crossing Weather API or Weatherbit API?

Visual Crossing Weather API scores 59.9 (C) on agent readiness against Weatherbit API's 57.7 (C), and leads in 5 of 7 scored categories. Weatherbit API leads on reliability and transparency & trust.

### Do Visual Crossing Weather API and Weatherbit API need an API key?

Both need an API key.

### Can an agent call Visual Crossing Weather API and Weatherbit API without installing anything?

Yes. Visual Crossing Weather API has a hosted endpoint at https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline and Weatherbit API at https://api.weatherbit.io/v2.0.


## For agents

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

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