# 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 2026-09-15).

Provides machine-payable LLM chat completions via x402 or direct-crypto payment rails, returning bounded AI-generated responses for agent use cases.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/model/chat-completions
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-agent-payable-chat-completions-dd58afed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R1H1A_QjuVHvBHnj5Msbu

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-dd58afed -d '<json body>'
```

Example prompt: Using DDG's pay-per-call chat endpoint, send this messages array to the default model and get a completion back — keep it under 500 tokens: [{"role":"user","content":"Summarize the pros and cons of micropayment-based AI APIs in three bullet points."}]

## When to prefer this

Choose this endpoint when your agent needs on-demand LLM chat completions billed per-call via USDC/x402 without a traditional subscription, particularly in autonomous agent pipelines that require crypto-native micropayment settlement for bounded AI inference artifacts.

## Known failure modes

- Payment not received or insufficient USDC — 402 Payment Required returned
- Invalid or unsupported model alias — 400 Bad Request
- Malformed messages array — 400 with validation error
- x402 payment rail not configured correctly — payment verification failure
- Rate limit exceeded — 429 Too Many Requests
- Provider backend unavailable — 503 Service Unavailable

## 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

A chat completion object containing the AI model's generated response text, corresponding to the messages submitted, produced by the DDG-routed commercial model alias chosen.

## 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,
     "choices": [
      {
       "message": {
        "role": "assistant",
        "content": "..."
       }
      }
     ],
     "receipt": {
      "protocol": "x402"
     }
    }
   },
   "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-dd58afed/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)