# Call a web API for each row

Acquire / http

A variant of [Fetch from the web](https://meridian.online/operations/fetch-from-the-web).

Send one HTTP request per input row, built from its values, and add the response to that row.

Page: <https://meridian.online/operations/fetch-from-the-web/call-a-web-api-for-each-row>

## Status

Not built yet.

arcform does not do this yet. [Its place on the roadmap](https://meridian.online/roadmap#fetch-from-the-web)

## What other tools call it

Meridian's classification; an independent blind rating agreed on 95.7% of 324 rows (variant, version 3).

- Azure Data Factory: [`External call`](https://learn.microsoft.com/en-us/azure/data-factory/data-flow-external-call) (read 2026-09-27)
- EasyMorph: [`Iterate Web Request`](https://help.easymorph.com/doku.php?id=transformations:iteratewebrequest) (read 2026-09-27)
- Apache Hop: [`HTTP Post`](https://hop.apache.org/manual/latest/pipeline/transforms/httppost.html) (read 2026-09-27)
- Apache Hop: [`HTTP client`](https://hop.apache.org/manual/latest/pipeline/transforms/http.html) (read 2026-09-27)
- Apache Hop: [`REST Client`](https://hop.apache.org/manual/latest/pipeline/transforms/rest.html) (read 2026-09-27)
- KNIME Analytics Platform: [`DELETE Request`](https://api.hub.knime.com/nodes/*qHyuqf6K9q6qpfCo?details=full) (read 2026-09-27)
- KNIME Analytics Platform: [`GET Request`](https://api.hub.knime.com/nodes/*jrLgNd_aIVOrfPsF?details=full) (read 2026-09-27)
- KNIME Analytics Platform: [`HEAD Request`](https://api.hub.knime.com/nodes/*QyvUoYynIb8B2cPd?details=full) (read 2026-09-27)
- KNIME Analytics Platform: [`PATCH Request`](https://api.hub.knime.com/nodes/*p7Ut87FYY_PSrZk2?details=full) (read 2026-09-27)
- KNIME Analytics Platform: [`POST Request`](https://api.hub.knime.com/nodes/*jDedZ_onUp4c833B?details=full) (read 2026-09-27)
- KNIME Analytics Platform: [`PUT Request`](https://api.hub.knime.com/nodes/*QNtcyg9ppUovyGNe?details=full) (read 2026-09-27)
- OpenRefine: [`Add column by fetching URLs…`](https://openrefine.org/docs/manual/columnediting#add-column-by-fetching-urls) (read 2026-09-27)
- Pentaho Data Integration: [`HTTP Post`](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview) (read 2026-09-27)
- Pentaho Data Integration: [`HTTP client`](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview) (read 2026-09-27)
- Pentaho Data Integration: [`REST Client`](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview) (read 2026-09-27)
- RapidMiner Studio: [`Enrich Data by Webservice`](https://docs.rapidminer.com/latest/studio/operators/extensions/Web%20Mining/services/enrich_data_by_webservice.html) (read 2026-09-27)
- RapidMiner Studio: [`Get Pages`](https://docs.rapidminer.com/latest/studio/operators/extensions/Web%20Mining/retrieve_webpages.html) (read 2026-09-27)
- Talend: [`tRestWebServiceLookupInput`](https://help.qlik.com/talend/en-US/components/8.0/webservice/webservice-component) (read 2026-09-27)