Create OpenSea listings from an incoming webhook
Sometimes the signal to list comes from your own script, dashboard, or backend, not a spreadsheet. Notis accepts a webhook from whatever tool you build and turns it into a live OpenSea listing, so your systems can act without you in the loop.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Create listing
List a single nft (erc721 or erc1155) for sale on the opensea marketplace.
Why this helps
Your custom tools can decide when to sell, but they cannot list on OpenSea themselves, leaving you as the manual bridge.
- Let any external tool trigger an OpenSea listing on demand
- Remove yourself as the manual bridge between systems
- Connect custom logic to real marketplace actions
- One webhook replaces a person copying details into OpenSea
Setup
Build it in a few focused steps.
- 1Connect OpenSea to Notis once from the portal.
- 2Create a New Automation named something like Webhook to OpenSea listing.
- 3Describe it: when I receive a webhook with an NFT and a price, create that listing for sale on OpenSea.
- 4Choose the incoming webhook as the trigger and pick the channel where Notis confirms each listing.
- 5Send one test webhook from your tool and confirm the listing is created.
Questions about this workflow
What sends the webhook?
Any tool or backend you control can send an HTTP request to the Notis webhook, and Notis acts on the details it carries.
How does Notis know the NFT and price?
You include them in the webhook payload and describe them in your instruction, so Notis reads them without any field-mapping screen.
Is this secure?
The webhook is unique to your automation, and Notis reports every run to your chosen channel so you can audit activity.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Sheets to Open sea. A trigger fires from one place; an action lands in another.
Google Sheets triggers
Open sea actions
Aggregate Metric Changed
Triggers when an aggregate metric (SUM/COUNT/AVG/MIN/MAX) changes in a Google Sheets spreadsheet. This trigger monitors an aggregate calculation on a target column (optionally filtered by a search column/value) and fires when the calculated result changes.
Build criteria offer
Build a portion of a criteria offer including the merkle tree needed to post an offer.
Cell Range Values Changed
Triggers when values in a specified A1 range change in Google Sheets. This trigger monitors a specific cell or range of cells and fires when any values change.
Cancel order
Offchain cancel a single order, offer or listing, by its order hash when protected by the signedzone. protocol and chain are required to prevent hash collisions. please note cancellation is only assured if a fulfillment signature was not vended prior to cancellation.
Conditional Format Rule Changed
Triggers when conditional formatting rules change in a Google Spreadsheet. Detects when rules are added, updated, or removed. Uses snapshot-based diffing to detect changes between polls.
Create criteria offer
Create a criteria offer to purchase any nft in a collection or which matches the specified trait.
Data Validation Rule Changed
Triggers when data validation rules change (added/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Create item offer
Create an offer to purchase a single nft (erc721 or erc1155).
Developer Metadata Changed
Triggers when developer metadata entries change (new/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Create listing
List a single nft (erc721 or erc1155) for sale on the opensea marketplace.
Filtered Range Values Changed
Polling trigger that monitors Google Sheets filtered ranges for value changes. Uses snapshot-based diffing to detect when values matching a data filter change. Emits the matched values when changes are detected.
Fulfill listing
Retrieve all the information, including signatures, needed to fulfill a listing directly onchain.
New Rows in Google Sheet
Simple polling trigger that monitors Google Sheets for new rows. Detects when new rows are added and returns the complete row data. Perfect for triggering any workflow based on new sheet entries.
Fulfill offer
Retrieve all the information, including signatures, needed to fulfill an offer directly onchain.
New Sheet Added in Google Spreadsheet
Polling trigger that detects when a new sheet is added to a Google Spreadsheet.
Get account
Get an opensea account profile including details such as bio, social media usernames, and profile image.
Connect any two apps with Notis in the middle.
Not just Google Sheets and Open sea. Any combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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