# DDG ERC-8004 Agent Identity Screener

> DDG ERC-8004 Agent Identity Screener is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Screens an ERC-8004 on-chain agent identity by resolving its tokenURI, fetching/parsing the agentURI, probing declared service endpoints, and sampling the reputation registry to return a signed verdict on reachability and groundedness.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/8004/screen?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-erc-8004-agent-identity-screener-d3383e40
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GymCSJ_p0LVd6DVlk1W7D

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-erc-8004-agent-identity-screener-d3383e40 -d '<json body>'
```

Example prompt: Can you screen agent token ID 42 on the ERC-8004 Identity Registry and tell me whether it's registered, reachable, and grounded — I want a signed verdict before I interact with it.

## When to prefer this

Use this endpoint when you need a cryptographically signed, multi-signal trust verdict on an ERC-8004 compliant AI agent identity before interacting with or delegating to it. It is preferable over manual on-chain lookups because it bundles registry resolution, agentURI fetching, live endpoint probing, and reputation sampling into a single $0.01 call with a signed output. Choose this over generic DID resolvers when the agent specifically follows the ERC-8004 Trustless Agents standard.

## Known failure modes

- Agent token ID does not exist on-chain — registry lookup returns not-found
- agentURI scheme unsupported or IPFS content unavailable — fetch fails
- Declared service endpoints unreachable or timeout during liveness probe
- Reputation registry unavailable — partial verdict returned without reputation sample
- Malformed agentURI or tokenURI — parsing error in verdict
- Invalid request body schema — 400 bad request

## How this service works

Screen an ERC-8004 (Trustless Agents) agent identity: resolve tokenURI on the on-chain Identity Registry, fetch and parse the agentURI (ipfs/https/data:), live-probe its declared service endpoints (bounded), sample the reputation registry, and return a signed registered/reachable/grounded verdict. $0.01.

## Output

A signed verdict object indicating whether the agent is: (1) registered — has a valid tokenURI on the Identity Registry; (2) reachable — its agentURI (IPFS/HTTPS/data) resolves and parses successfully; (3) grounded — live-probed service endpoints respond within bounds; plus a sampled reputation registry score. The response is cryptographically signed for downstream trust decisions.

## 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
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-erc-8004-agent-identity-screener-d3383e40/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)