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GET /api/v1/_siblings — List Sibling Services
GET /api/v1/_siblings — List Sibling Services is a paid API for AI agents from scheduler.withzero.xyz, paid per call via MPP, price unknown, status unknown (last checked 2026-10-10, last successful call 2026-07-29).
Returns a list of sibling API services related to the scheduler.withzero.xyz platform, including their names, descriptions, and OpenAPI URLs.
Price / call—
Success100%
StatusUnknown
How this service works
Known sibling capabilities. Names may appear in a task `tool_list`. 📖 Full guide: https://scheduler.withzero.xyz/llms.txt
Output
Returns a JSON object with a 'siblings' array, where each item contains: 'name' (string), 'description' (string), and 'openapi_url' (string) pointing to that sibling service's OpenAPI specification. This is a service discovery/catalog endpoint.
Example use cases
Auto-configure multi-tool agent capabilities
“I need to set up a new AI agent that can work with the withzero scheduler platform. Can you discover all the available sibling services and pull their OpenAPI specs so we can register them as tools?”
Audit ecosystem APIs for compliance
“We're evaluating withzero.xyz for our infrastructure. List out every API service they offer alongside the scheduler so we can review what integrations are possible and check our security requirements.”
Migrate workflows across scheduler APIs
“We're currently using one withzero service but want to explore their other offerings. Show me what sibling APIs are available so I can find better options for our notification routing and task management needs.”
Technical details
Endpoint
GEThttps://scheduler.withzero.xyz/api/v1/_siblings?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to auto-discover the full set of related APIs available from the scheduler.withzero.xyz platform — particularly useful for bootstrapping agent toolchains that need to enumerate and load OpenAPI specs dynamically. Prefer this over hardcoding sibling service URLs.
Side effects
- Empty siblings array if no sibling services are registered
- 500 Internal Server Error if the service registry is unavailable
- Network timeout if the upstream service catalog is slow to respond
Input
{}Output
{
"siblings": [
{
"name": "urlshortener",
"description": "Shorten a long URL into a compact link.",
"openapi_url": "https://urlshortener.withzero.xyz/openapi.json"
},
{
"name": "cdn",
"description": "Wallet-keyed CDN for hosting agent-produced assets.",
"openapi_url": "https://cdn.withzero.xyz/openapi.json"
},
{
"name": "forms",
"description": "Lightweight form-builder + submission collection for agents.",
"openapi_url": "https://forms.withzero.xyz/openapi.json"
},
{
"name": "screenshot",
"description": "Render a screenshot of a URL via headless Chrome.",
"openapi_url": "https://screenshot.withzero.xyz/openapi.json"
},
{
"name": "inbox",
"description": "Durable pull-based agent inbox + webhook ingress.",
"openapi_url": "https://inbox.withzero.xyz/openapi.json"
}
]
}Schema · Response
| Field | Type | Description |
|---|---|---|
| siblingsrequired | array |
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