Post branded Instagram testimonial cards from Airtable with Bannerbear and uploadtourl

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Last update

Last update 9 hours ago

🎯 What This Workflow Does

This template manages the entire lifecycle of a testimonial post, from data retrieval to final notification:

Schedule Trigger: Automatically fires daily at 10:00 AM; cadence can be adjusted via cron expression.
Airtable — Fetch Review: Retrieves the oldest 5-star, unposted record using a specific filter formula to prevent duplicates.
IF — Has Valid Review?: Validates the data; the workflow exits gracefully if no new reviews are found and only proceeds when a 5-star review is ready.

Code — Prepare Payload: Formats review data into a JSON body, mapping fields like name and truncated text to Bannerbear layers while generating the final Instagram caption.
HTTP — Create Image Job: Submits the request to the Bannerbear API and retrieves a unique job uid for asynchronous processing.

HTTP — Poll Status: Regularly checks the job status via the Bannerbear API to see if the rendering is finished.
IF — Image Ready?: Confirms completion; if still processing, it triggers a "Wait 3s + re-poll" loop for up to 5 retries before passing the image_url forward.
uploadtourl Bridge: Mandatory CDN step that uploads the rendered image binary and returns a stable public URL, which is required for Instagram's API to access the file.

IG — Create & Publish: Executes the two-step Instagram Graph API flow to create a media container and publish it to your feed after a safe 6-second buffer.
Airtable — Mark as Posted: Updates the original record with the Post ID and timestamp to prevent duplicate posting.
Slack Notification: Sends a final team alert with a preview of the card and the live link.

Adaptive Polling: Instead of a static wait time, the workflow intelligently polls Bannerbear until the image is confirmed ready.
Automated CDN Bridge: Uses uploadtourl to bypass Instagram's rejection of base64/binary payloads by providing a direct public URL.
Intelligent Truncation: Automatically shortens long reviews to 180 characters to ensure perfect readability on your branded quote card.
Full Audit Trail: Every post is logged back to Airtable with its live Instagram ID and CDN URL for easy reporting.

SaaS Companies: Showcasing user feedback and "Love letters" from customers.
E-commerce Brands: Sharing 5-star product reviews to build buyer confidence.
Service Providers: Highlighting client testimonials on a regular schedule.
Digital Marketers: Automating the "Social Proof" pillar of a social media strategy.

Bannerbear: API key and a Template ID with layers named reviewer_name, review_text, and star_label.
Instagram Graph API: A Business or Creator account access token.
uploadtourl: Credentials configured in n8n for mandatory media hosting.
Airtable: A base with a Reviews table containing fields for the name, text, and rating.