Content from

     https://software.ecmwf.int/wiki/display/WEBAPI/WebAPI+FAQ

   Web-API FAQ

Summary

Content by Label

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  Total number of requests a user can submit - Web API FAQ (User Documentation) — 20 queued requests per user
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  Limitations in the Public Datasets web interface - Web API FAQ (User Documentation) — We have limited the time period selection for retrievals from the Web User Interface (UI), in order to  improve the service performance but also to help the users to learn how to submit efficient MARS request
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  In the Public Datasets web interface some boxes are greyed out - Web API FAQ (User Documentation)
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  ERROR 17X (DATASET_PHASED_OUT) - Web API FAQ (User Documentation)
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  How to retrieve data in netCDF format - Web API FAQ (User Documentation) —

  • Yes,You only have to add in your request "format" : "netcdf"
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  How to request a limited area region - Web API FAQ (User Documentation) — Yes,If you have already set the "grid" keyword in your request, you can add the "area" : "coordinates" keyword
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  The Web API flow chart - Web API FAQ (User Documentation) — Web API python client, request is checked for validity and is visible in API job list.
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  Differences between the full MARS client and Access MARS service - Web API FAQ (User Documentation) — Some users might be used to the full MARS client to access MARS. There are some limitations if you use the Access MARS service compared to the full MARS client
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  Web API single request limits - Web API FAQ (User Documentation) — There are limitations on the total number of fields
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  Data access restrictions - Web API FAQ (User Documentation) — Yes, you can only access datasets that you have been given access rights to.
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  Fields interpolation - Web API FAQ (User Documentation) — The transformation and interpolation is done by MARS using a library called MIR.

  MARS interpolation with MIR

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  Definition of MARS request - Web API FAQ (User Documentation) — MARS stands for Meteorological Archive System. MARS is the ECMWF archival system which handles the requests that are submitted externally through the Web-API
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  How to write a Web API request - Web API FAQ (User Documentation) — Presumably, before you start using Web-API you need to be able to write your own "request" which describes the data you wish to download
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  Total time of a request - Web API FAQ (User Documentation) — The  request may take some time ( from some minutes, to many hours ) to complete, depending on some factors and limitations.
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  ecmwf.API error 1: User has no access to services mars - Web API FAQ (User Documentation)