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1

Get your credentials

Your client ID and client secret are provided by Tesouro during onboarding. To request access, have your designated team lead submit an access request.
2

Get an access token

Exchange your credentials for a short-lived JWT:
curl --location 'https://api.sandbox.tesouro.com/openid/connect/token' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data-urlencode 'grant_type=client_credentials' \
  --data-urlencode 'client_id=YOUR_CLIENT_ID' \
  --data-urlencode 'client_secret=YOUR_CLIENT_SECRET'
3

Make your first API call

Use the token to call the GraphQL endpoint. For example, create an underwriting application:
curl --request POST \
  --url https://api.sandbox.tesouro.com/graphql \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Bearer YOUR_ACCESS_TOKEN' \
  --data '{
  "query": "mutation CreateApp($input: UnderwritingApplicationCreateInput!) { createUnderwritingApplication(input: $input) { underwritingApplication { id status } errors { __typename } } }",
  "variables": {
    "input": {
      "processingActivity": {
        "currency": "USD",
        "averageMonthlySalesAmount": 50000,
        "averageTicketAmount": 120,
        "cardPresentMix": 0.6,
        "cardNotPresentMix": 0.4
      }
    }
  }
}'

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