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Register External Webhook Source (inbox.withzero.xyz)
Register External Webhook Source (inbox.withzero.xyz) is a free API for AI agents from inbox.withzero.xyz, Free, status unknown (last checked 2026-09-15).
Registers an external webhook source (GitHub, Stripe, or generic) and returns the inbound URL and HMAC secret to configure in the external system.
Price / callFree
Success—
StatusUnknown
How this service works
Register an external webhook source; returns its inbound URL + secret. 📖 Full guide: https://inbox.withzero.xyz/llms.txt
Output
Returns a JSON object with the connection ID, human label, sourceType, the inbound webhook URL to paste into the external system, the HMAC signing secret (shown only once), and a createdAt timestamp.
Example use cases
Connect Stripe webhooks to agent inbox
“Set up a new Stripe webhook source called 'stripe-payments' in my inbox so I can start receiving payment events — use the stripe source type and generate a signing secret for me that I can paste into my Stripe dashboard settings.”
Register generic webhook for custom service
“Register a generic webhook source called 'shopify-orders' in my inbox for my custom e-commerce integration — I need the inbound URL and HMAC secret back so I can configure them on the sending side.”
Provision durable GitHub Actions listener
“Create a new GitHub webhook source called 'ci-pipeline-events' in my inbox using the github source type — I want to capture workflow run events from my GitHub Actions, so give me the inbound URL and secret I can drop into the repo's webhook settings.”
Technical details
Endpoint
POSThttps://inbox.withzero.xyz/api/v1/connectionsWhen to prefer
Use this endpoint when you need to receive events pushed by an external system (GitHub, Stripe, or any HTTP webhook source) into your agent's durable inbox. This is the first step before you can drain those events; choose the sourceType matching your provider to get correct HMAC signature verification and payload normalization.
Side effects
- Missing required fields (name or sourceType) returns 400 validation error
- Invalid sourceType value (not github/stripe/generic) returns 400
- Secret too short (under 8 chars) or too long (over 256 chars) returns 400
- Unauthorized request (missing or invalid signed proof credential) returns 401
- Duplicate or conflicting connection name may return 409
Input
{
"name": "test-generic-webhook",
"sourceType": "generic"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| namerequired | string | Human label for this source. |
| secret | string | HMAC secret. For github/stripe paste the provider secret; omit for generic to auto-generate. |
| sourceTyperequired | string | Signature scheme + payload normalizer. |
Output
{
"id": "4d03ce0e-f93c-49a5-bc7a-c0de7ca139df",
"url": "https://inbox.withzero.xyz/api/v1/webhooks/4d03ce0e-f93c-49a5-bc7a-c0de7ca139df",
"name": "test-generic-webhook",
"secret": "2af18b68cc1920b06ab786653ab451a5568481d304aa0b79",
"createdAt": "2026-06-03T22:46:26.712Z",
"sourceType": "generic"
}Schema · Response
| Field | Type | Description |
|---|---|---|
| idrequired | string | |
| urlrequired | string | Inbound webhook URL to configure in the external system. |
| namerequired | string | |
| secretrequired | string | HMAC secret (shown once). Configure the external system to sign with it. |
| createdAtrequired | string | |
| sourceTyperequired | string |
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