How do I send an ICP Brazil certificate via the API?

Hi,

Thanks for reaching out to Docusign Community.

You must include the "signatureProviderName": "UniversalSignaturePen_ICP_SmartCard_TSP" parameter for the signer in your Envelopes:create call. 

{
  "signers": [
    {
      "routingOrder": 1,
      "name": "Signer Name",
      "email": "signer@example.com",
      "deliveryMethod": "email",
      "recipientId": "1",
      "recipientSignatureProviders": [
        {
          "signatureProviderName": "UniversalSignaturePen_OpenTrust_Hash_TSP"
          }
        }
      ]
    }
  ]
}

More informations in the documentation:

https://developers.docusign.com/docs/esign-rest-api/esign101/concepts/standards-based-signatures/

Best regards,