# DDG Agent-Payable Chat Completions

> DDG Agent-Payable Chat Completions is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Provides machine-payable AI chat completions via x402 USDC micropayment rails, returning bounded assistant responses for AI agent use.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/chat/completions?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-agent-payable-chat-completions-4126acfa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cUlswoaoSxLXzz8ZNz9sM

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-agent-payable-chat-completions-4126acfa -d '<json body>'
```

Example prompt: Ask the DDG agent service a question — something like 'explain quantum entanglement in two sentences' — and pay the $0.01 USDC fee automatically using x402 to get back the assistant's answer.

## When to prefer this

Choose this endpoint when your AI agent needs pay-per-call LLM completions billed in USDC via the x402 protocol without requiring a subscription or API key account — ideal for autonomous agents that need to self-fund queries on-chain and receive bounded, auditable results with payment receipts.

## Known failure modes

- Payment not settled — x402 handshake fails, returns 402 with payment instructions
- Malformed request body — missing required input/output fields returns validation error
- Insufficient USDC balance — payment rejected before completion is served
- Provider backend unavailable — upstream LLM service unreachable, returns 5xx
- Unsupported HTTP method — only POST/PUT/PATCH accepted, others return 405

## How this service works

Machine-payable DDG services for AI agents. Current public live payment rails are x402 multi-chain USDC and direct-crypto auto/manual for public receiving-address families. MPP/Stripe/Tempo is installed but pending live provider env plus penny-settlement proof before any MPP-live advertisement. DDG sells bounded artifacts/results, not raw provider account access.

## Output

Returns a JSON object with ok:true, a choices array containing assistant messages (role + content), and a receipt object confirming the x402 protocol payment settlement.

## 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,
  "choices": [
   {
    "message": {
     "role": "assistant",
     "content": "..."
    }
   }
  ],
  "receipt": {
   "protocol": "x402"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-agent-payable-chat-completions-4126acfa/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)