Amazon S3

Amazon S3 cloud storage — upload, download, and manage objects in S3 buckets for B2B file exchange.

Overview

Property	Value
Type	http
Authentication	api_key
Category	Generic

Configuration

Field	Type	Required	Description
access_key_id	string	Yes	AWS access key ID
secret_access_key	string	Yes	AWS secret access key
region	string	Yes	AWS region (e.g., us-east-1)
bucket	string	Yes	S3 bucket name

Available actions

The Amazon S3 connector does not ship with pre-defined action slugs. Instead, fyrn’s AI generates the appropriate S3 API calls based on your flow description. Common operations include:

• PutObject — Upload a file or data to an S3 bucket with a specified key.
• GetObject — Download an object from S3 by key.
• ListObjects — List objects in a bucket, optionally filtered by prefix.
• DeleteObject — Delete an object from S3 by key.
• CopyObject — Copy an object between keys or buckets.
• HeadObject — Check if an object exists and retrieve its metadata.

When you describe a flow that involves S3, fyrn generates the correct API calls with proper AWS Signature V4 authentication handled automatically via the configured credentials.

Example flow

flows/sftp-to-s3-with-notification.yaml

flow: sftp-to-s3-with-notification
version: 1
description: Download a file from partner SFTP, upload to S3 bucket, and notify via Slack

source:
  connector: sftp-partner
  trigger: schedule
  cron: "0 */2 * * *"

steps:
  - name: list-new-files
    target: sftp-partner
    action: list-directory
    mapping:
      remotePath: /outbound/invoices
    store_as: file_list

  - name: download-and-upload
    target: sftp-partner
    action: download-file
    for_each: file_list | filter(item.extension == "csv")
    mapping:
      remotePath: /outbound/invoices/{{ item.name }}
    store_as: downloaded_files

  - name: upload-to-s3
    target: amazon-s3-archive
    action: put-object
    for_each: downloaded_files
    mapping:
      key: "invoices/{{ now | date('YYYY/MM') }}/{{ item.filename }}"
      body: item.content
      content_type: text/csv

  - name: notify-team
    target: slack-internal
    action: send-message
    mapping:
      channel: "#file-processing"
      text: "Uploaded {{ downloaded_files | length }} invoice file(s) from partner SFTP to S3."

on_error:
  retry: 3x exponential(30s)
  then: dead-letter