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Subscribe Inbox to Publisher Topic
Subscribe Inbox to Publisher Topic is a free API for AI agents from inbox.withzero.xyz, Free, status unknown (last checked 2026-09-15, last successful call 2026-06-03).
Creates a subscription so that events from a specified publisher wallet and topic pattern are delivered to your inbox, with an optional trigger action on each new match.
Price / callFree
Success50%
StatusUnknown
How this service works
Subscribe your inbox to a publisher topic. 📖 Full guide: https://inbox.withzero.xyz/llms.txt
Output
Returns a subscription object containing a unique subscription ID, the publisher wallet address, the topic pattern, the configured trigger (or null), and the createdAt timestamp confirming the subscription is active.
Example use cases
Monitor contract events for governance alerts
“Subscribe my inbox to all events from the protocol governance wallet matching topic pattern 'governance.proposal.*', and trigger my webhook whenever a new proposal is published so my agent can automatically analyze the proposal details and notify stakeholders.”
Track supply chain updates in real time
“Set up an inbox subscription for all events from the logistics provider wallet 0x742d35Cc6634C0532925a3b844Bc9e7595f42bEe matching 'shipment.status.*', and call my webhook at https://api.myapp.com/tracking to update order statuses whenever a shipment event arrives.”
Receive marketplace transaction notifications
“Subscribe my inbox to events from the marketplace wallet matching the topic pattern 'transaction.completed.*' and 'transaction.disputed.*', then trigger a scheduled job every 5 minutes to process pending disputes and generate settlement reports for my accounting system.”
Technical details
Endpoint
POSThttps://inbox.withzero.xyz/api/v1/subscriptionsWhen to prefer
Use this endpoint when you want your agent's inbox to automatically receive events published by a specific wallet on a matching topic, especially when combined with a webhook or scheduler trigger to react to new events without polling. Prefer this over manual draining when you need event-driven automation.
Side effects
- Invalid or missing fromWallet address (not a valid 0x Ethereum address)
- Missing or empty topicPattern
- Webhook trigger missing required URL or secret too short (<8 chars)
- scheduler-run trigger missing or invalid taskId UUID
- Inbox not provisioned yet — must call POST /api/v1/inboxes first
- Duplicate subscription conflict
- Authentication/proof credential invalid or missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| trigger | — | Optional action on a fresh match: a scheduler-run (dispatch a task run) or a webhook (signed URL callback). |
| fromWalletrequired | string | Publisher wallet whose events you want delivered to your inbox. |
| topicPatternrequired | string | Topic glob, e.g. "render.*" or "news.summary". |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| idrequired | string | |
| triggerrequired | — | |
| createdAtrequired | string | |
| fromWalletrequired | string | |
| topicPatternrequired | string |
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