Transcend's GraphQL API

Transcend offers a GraphQL API to interact with its offerings, in an automated fashion.

The GraphQL API is hosted at https:////api.transcend.io/graphql (or https://api.us.transcend.io/graphql if you are a US-based customer). You can visit those pages using a web browser to find an GraphQL playground to discover all the different queries and operations we support using the GraphQL API.

You will need an API key generated from the Transcend Admin-dashboard, with the appropriate scopes granted to the key, for the routes you wish to use. Include the API key generated as a Bearer token, with the Authorization header in any requests you send to the GraphQL API.

We have an established set of best practices when calling our GraphQL API, especially for certain queries and mutations.

When using the GraphQL API for a query to read some information from Transcend's systems, we recommend you use the useMaster: false parameter in order to route your requests to our read-replicas. While the GraphQL resolver will certainly attempt to route your query to the right database instance to process your query, we recommend using this parameter to avoid any ambiguity.

Our read-replicas have a typical replication lag of about 100 milliseconds.

An example query with the useMaster parameter is:

query ListDataSilos {
  dataSilos(first: 10, useMaster: false) {
    nodes {
      id
      title
      type
    }
  }
}

When repeatedly calling the subDataPoints GraphQL query, we recommend using a cursor-based pagination using the id attribute to massively decrease the response times to your queries. Each subsequent call to the GraphQL query would use the id attribute of the last subDataPoint in the response (nodes[nodes.length - 1].id), as the cursor for the next page of results.

An example query is:

query ListSubDataPointsByDataSilo($datasilo: ID!, $id_cursor: ID!) {
  subDataPoints(
    first: 100
    filterBy: { dataSilos: [$datasilo], cursor: { id: $id_cursor } }
    useMaster: false
  ) {
    nodes {
      id
      name
    }
    totalCount
  }
}