# DDG Heartbeat Register

> DDG Heartbeat Register is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Registers a heartbeat event for an agent-payable DDG service via an authenticated HTTP POST, confirming liveness or session continuity.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/heartbeat/register?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-heartbeat-register-c460c55e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4mZdALZeRT1-cEk_Rs5dd

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ddg-heartbeat-register-c460c55e -d '<json body>'
```

Example prompt: Register a heartbeat with Daedalus Development Group's agent service to confirm this agent is still alive — send a JSON POST body signaling liveness.

## When to prefer this

Choose this endpoint when you need to register a liveness or heartbeat signal specifically with the Daedalus Development Group (DDG) agent-payable infrastructure and are operating within the x402 micropayment protocol. Prefer this over generic monitoring services when your agent is already integrated into the DDG ecosystem and needs to confirm uptime or session continuity at low cost ($0.01 USDC per call).

## Known failure modes

- Payment not included or insufficient USDC — 402 Payment Required response
- Malformed body or missing required fields (type, method, bodyType, body) — 400 Bad Request
- Unsupported HTTP method in input enum — validation error
- Service unavailable or network timeout — 503 or connection error
- Invalid bodyType value outside allowed enum (json, form-data, text) — schema validation failure

## How this service works

DDG agent-payable service request

## Output

Returns a JSON object with an 'ok' boolean flag (true) confirming the heartbeat was successfully registered.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "ok": true
    }
   },
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-heartbeat-register-c460c55e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.daedalusdevelopmentgroup.com](https://www.zero.xyz/host/agents.daedalusdevelopmentgroup.com/llms.txt)