Primas Node API Documentation
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Primas Node API Documentation

Status update: The APIs are finally live on the mainnet. At this moment, all the APIs writing data require the whitelisting of your address. Contact the dev team on Slack to get whitelisted.

Join Primas developer community on Slack:




Primas is a platform for premium quality content based on DTCP (Decentralized Trusted Content Protocol). Primas uses blockchain technology to ensure the credibility of content, uses economic incentives to accelerate the generation and circulation of high-quality content, and allows readers to see personalized, high-quality content through social recommendations. Traditional Internet applications can also use APIs to access Primas, immediately gaining access to the power Primas offers.

Primas Node

Primas decentralized network is accessible through one of the Primas Nodes. And every Primas Node exposes the same collection of APIs as described in this document. To use these APIs, you need to find a live Primas Node or host one yourself. Nodes hosted by the Primas development team are accessible at:


Mainnet Nodes:

Getting Started

The getting started guide will walk you through the general process of connecting a traditional content application to Primas. Be sure to check the basic concepts about Primas and DTCP before you start.

RESTful API and Transfer Encoding

APIs are served using standard RESTful methods with HTTPS. For posting, both JSON and Form-Data are supported for request body. Data sent from Primas Node is always in JSON format.

To post data in JSON format, set Content-Type to application/json in http header. To post using Form-Data, set Content-Type to application/x-www-form-urlencoded or multipart-formdata to upload images.

API should be prefixed with API version. For example, when trying to get the metadata for an article. We should call:


The response data will always include a field result_code indicating the invocation status. On successful invocation result_code will be 0. And the response data is in the field data. Otherwise result_code will be the corresponding error type while at the same time there will be another field result_msg containing the detailed description of the error.

DTCP Metadata

Primas is built upon DTCP. A lot of APIs are transferring data in the DTCP standard. Check the DTCP brief introduction for a detailed explanation about DTCP and its usage in Primas.

API Batch Post

APIs creating object, such as posting article, creating group, sharing article, all support batch post. Batch post can only be used with JSON format posting. To post in batch, simply pass a JSON array whose elements are the same group of metadata passed when creating a single object. The returning data field becomes an array containing the corresponding data for each metadata in the same order then.

API List

Error Code and Troubleshooting

result_code result_msg description
0 success Success
400 client error Client error
401 invalid data Invalid post data
402 parse input JSON format error Invalid JSON string
403 client signature error Signature verification failed
404 input parameter error Invalid parameter
405 input parameter empty Empty parameter
406 nonce less than lasted Nonce is used before
500 server error Server error