English Part-of-Speech and Morphology Analyzer

Annotates Token and Sentence in English text, and assigns to each token:

  • a part-of-speech tag (as the "category" feature) using the standard "HepTag" POS tagger of ANNIE
  • a morphological root and affix using the GATE Morphological Analyser.

Default annotations
:Token The individual tokens of the text, with "category" feature for POS and "root" and "affix" for morphology
Additional annotations available if selected
:SpaceToken The spaces between tokens
:Sentence Sentences detected by the sentence splitter
1,200 free requests / day
Larger batches GBP0.80 / CPU hour

Use this pipeline

Single documents

You can process up to 1,200 documents per day free of charge using the REST API, at an average rate of 2 documents/sec. Higher quotas are available for research users by arrangement, contact us for details.

The API endpoint for this pipeline is:


Create API Key

Batches of documents

You can process any amount of data with this pipeline on a pay-as-you-go basis, for GBP0.80 per hour. This can be data you upload yourself, data you collected from Twitter, or the results of a previous job.

Reserve a job