# DDG RAG Answer Endpoint

> DDG RAG Answer Endpoint is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Answers questions using retrieval-augmented generation (RAG) via a per-call micropayment model on the x402 payment rail

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/rag/answer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-rag-answer-endpoint-12bdaa4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UN-uZgxR1cCjSryg1xUKL

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-rag-answer-endpoint-12bdaa4d -d '<json body>'
```

Example prompt: Ask the DDG RAG service: what are the main causes of supply chain disruptions in semiconductor manufacturing?

## When to prefer this

Choose this endpoint when you need a pay-per-query RAG-based question answering service accessible via the x402 micropayment protocol at $0.01 USDC per call. Prefer it over general LLM APIs when you want retrieval-grounded answers rather than purely parametric responses, and when operating in an agentic context that supports x402 payment rails.

## Known failure modes

- Payment not included or insufficient USDC — 402 Payment Required returned
- Malformed request body missing required fields (type, method, bodyType, body) — 400 Bad Request
- Service unavailable or backend RAG pipeline failure — 500 Internal Server Error
- Invalid bodyType enum value — validation error returned
- Empty or malformed question input — degraded or empty answer returned

## How this service works

DDG agent-payable service request

## Output

A synthesized, retrieval-augmented answer to the submitted question, returned as a JSON response with an ok status and the generated answer text based on retrieved context documents.

## 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-rag-answer-endpoint-12bdaa4d/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)