# DDG Agent Identity Key Binding

> DDG Agent Identity Key Binding is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Register, list, resolve, or revoke an ed25519 signer key binding (SHA-256 fingerprint) for a DDG-pinned agent identity, upgrading trust from verified-tofu to verified.

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/tine/key-bind?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-agent-identity-key-binding-5f10e964
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r9PLDi4p0FXHlwUsNWZam

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-identity-key-binding-5f10e964 -d '<json body>'
```

Example prompt: Register my ed25519 public key with the DDG agent identity system — the key fingerprint is sha256:abc123def456... — so my agent's trust level upgrades from verified-tofu to verified.

## When to prefer this

Use this endpoint when you need to cryptographically anchor an agent identity to a specific ed25519 signing key within the DDG trust framework — especially when you want to upgrade agent trust level from verified-tofu (first-use heuristic) to fully verified (explicit key pinning). Prefer this over generic PKI or DID systems when operating within the DDG agent-payable services ecosystem and x402 payment rails.

## Known failure modes

- Invalid or malformed ed25519 key fingerprint returns a validation error
- Attempting to revoke a non-existent binding returns a not-found error
- Payment failure via x402 protocol results in 402 response and no state change
- Conflicting key binding (already registered) may return a conflict error
- Unauthorized agent identity access returns 401/403
- Malformed JSON body returns 400 bad request

## 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 JSON response confirming the operation result with an 'ok' boolean, plus details about the key binding record — including the agent identity, the SHA-256 fingerprint of the ed25519 key, the binding action performed, and the updated trust/verification status.

## 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-agent-identity-key-binding-5f10e964/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)