# DDG Credential Verification Service

> DDG Credential Verification Service is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Verifies credentials or tokens by accepting an HTTP input specification and returning a boolean validity result

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/credentials/verify?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-credential-verification-service-602f14a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W8WApfoRBiCoJ64dj2C_X

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-credential-verification-service-602f14a2 -d '<json body>'
```

Example prompt: Can you verify this credential using DDG's verification service — it's a JSON body with the credential fields, and it should come back telling me whether it's valid or not?

## When to prefer this

Choose this endpoint when you need a lightweight, micropayment-gated credential verification check that returns a simple boolean result, especially in agent workflows using x402 USDC payment rails. Prefer it over heavier identity platforms when you only need a pass/fail answer at $0.001 per call with no need for raw provider account access or detailed identity data.

## Known failure modes

- Payment not received or insufficient USDC balance — request rejected before processing
- Malformed request body or missing required fields (type, method, bodyType, body) — validation error returned
- Invalid or expired credential submitted — ok: false returned
- Network or upstream service unavailability — connection timeout or 5xx error
- Unsupported HTTP method enum value provided — schema validation failure

## 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 a single boolean field `ok` — true if the credential passed verification, false otherwise. Response is minimal and machine-readable, suitable for direct use in agent decision logic.

## 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-credential-verification-service-602f14a2/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)