Create an async CSV import job

Accepts multipart/form-data with a file field (the CSV) and an optional block_ttl_days (integer >0, default 30). Validates:

content ≤ 25 MiB, else 413
row count ≤ 250 000, else 413
header-only / all-blank / undetectable provider → 400 Returns 202 with the import record (status pending); an Oban worker (EmailBlockImportWorker, max_attempts 3) transitions pending → processing → completed | failed.

Native Telnyx exports are detected by the stable first-12-column header signature (id … group_id) and are restored with their original from, domain_id, group_id, source, status, expires_at, plus bounce_category, dsn_code, and meta when present (scope is re-derived from domain_id/from; the exported scope cell must be a valid enum value). Lifecycle changes reconcile through the same create path as the API: a row already in the requested state restores its mutable backup fields without a new audit event, and a real transition (e.g. tombstone → active) appends the matching lifecycle event. block_ttl_days is not applied to native rows — their exported expires_at is preserved verbatim.

Competitor and generic imports (SendGrid / Mailgun / SES / generic) remain account-scoped (from, domain_id, group_id, scope are not read) and block_ttl_days applies only to imported manual_block rows; other reasons get expires_at: nil. Provider is auto-detected from the CSV header (sendgrid / mailgun / ses / generic).

POST

email_blocks

import

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const EmailBlockImport = await client.emailBlocks.imports.create();

console.log(EmailBlockImport.data);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
email_block_import = client.email_blocks.imports.create()
print(email_block_import.data)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	import, err := client.EmailBlocks.Imports.New(
		context.TODO(),
		telnyx.EmailBlockImportNewParams{
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", import.Data)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.emailBlocks.imports.ImportCreateParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        ImportCreateParams params = ImportCreateParams.builder()
            .build();
        var response = client.emailBlocks().imports().create(params);
    }
}

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $email_block_import = $client->emailBlocks->imports->create();

  var_dump($email_block_import);
} catch (APIException $e) {
  echo $e->getMessage();
}

curl --request POST \
  --url https://api.telnyx.com/v2/email_blocks/import \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file=@example-file \
  --form block_ttl_days=30

{
  "data": {
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "record_type": "email_block_import",
    "status": "pending",
    "total": 0,
    "provider": "sendgrid",
    "created_at": "2024-01-23T18:10:02.574Z",
    "updated_at": "2024-01-23T18:10:02.574Z",
    "completed_at": "2024-01-23T18:10:02.574Z",
    "processed_rows": 0,
    "created_count": 0,
    "existing_count": 0,
    "skipped_count": 0,
    "error_count": 0,
    "failure_reason": "string"
  }
}

{
  "errors": [
    {
      "code": "10015",
      "title": "Validation Failed",
      "detail": "is invalid",
      "source": {
        "pointer": "/filter[reason]"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unauthorized",
      "detail": "Missing authentication"
    }
  ]
}

{
  "errors": [
    {
      "code": "406",
      "title": "Not Acceptable",
      "detail": "Not Acceptable"
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unexpected error",
      "detail": "An unexpected error occured."
    }
  ]
}

{
  "errors": [
    {
      "code": "10015",
      "title": "Validation Failed",
      "detail": "can't be blank",
      "source": {
        "pointer": "/data/attributes/to"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unexpected error",
      "detail": "An unexpected error occured."
    }
  ]
}

Authorizations

Authorization

string

header

required

Telnyx API key supplied as Authorization: Bearer <token>. In production, auth may be validated by the API gateway and forwarded via Telnyx auth headers.

Body

multipart/form-data

file

required

The CSV file (Plug.Upload). Missing/non-upload → 400.

block_ttl_days

integer

default:30

TTL for imported manual_block rows; other reasons get expires_at: null. Invalid/missing → falls back to 30.

Required range: x >= 1

Response

Import job accepted (status pending).

data

object

required

Import job. Schema fields hidden: account_id, csv_content, block_ttl_days. Nullable fields use the omit-nullable pattern.

Show child attributes

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const EmailBlockImport = await client.emailBlocks.imports.create();

console.log(EmailBlockImport.data);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
email_block_import = client.email_blocks.imports.create()
print(email_block_import.data)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	import, err := client.EmailBlocks.Imports.New(
		context.TODO(),
		telnyx.EmailBlockImportNewParams{
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", import.Data)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.emailBlocks.imports.ImportCreateParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        ImportCreateParams params = ImportCreateParams.builder()
            .build();
        var response = client.emailBlocks().imports().create(params);
    }
}

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $email_block_import = $client->emailBlocks->imports->create();

  var_dump($email_block_import);
} catch (APIException $e) {
  echo $e->getMessage();
}

curl --request POST \
  --url https://api.telnyx.com/v2/email_blocks/import \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file=@example-file \
  --form block_ttl_days=30

{
  "data": {
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "record_type": "email_block_import",
    "status": "pending",
    "total": 0,
    "provider": "sendgrid",
    "created_at": "2024-01-23T18:10:02.574Z",
    "updated_at": "2024-01-23T18:10:02.574Z",
    "completed_at": "2024-01-23T18:10:02.574Z",
    "processed_rows": 0,
    "created_count": 0,
    "existing_count": 0,
    "skipped_count": 0,
    "error_count": 0,
    "failure_reason": "string"
  }
}

{
  "errors": [
    {
      "code": "10015",
      "title": "Validation Failed",
      "detail": "is invalid",
      "source": {
        "pointer": "/filter[reason]"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unauthorized",
      "detail": "Missing authentication"
    }
  ]
}

{
  "errors": [
    {
      "code": "406",
      "title": "Not Acceptable",
      "detail": "Not Acceptable"
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unexpected error",
      "detail": "An unexpected error occured."
    }
  ]
}

{
  "errors": [
    {
      "code": "10015",
      "title": "Validation Failed",
      "detail": "can't be blank",
      "source": {
        "pointer": "/data/attributes/to"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10007",
      "title": "Unexpected error",
      "detail": "An unexpected error occured."
    }
  ]
}

Getting Started

Sending Email

Inboxes

Domains & Validation

Deliverability

Templates & Suppression

Events & Webhooks

For AI Agents

Create an async CSV import job

Authorizations

Body

Response