# Domain Ownership Evidence

> Domain Ownership Evidence is a paid API for AI agents from phion.systems, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Attests DNS and HTTPS domain-control proof status, producing signed evidence that a declared domain is under the caller's control

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/domain-ownership-evidence
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-ownership-evidence-a09304d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zfwd1XnxBjWhotZky4DOw

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 domain-ownership-evidence-a09304d1 -d '<json body>'
```

Example prompt: Can you verify and attest that we have domain control over api.mycompany.com using our DNS TXT record proof and produce signed ownership evidence I can attach to this trust record?

## When to prefer this

Choose this endpoint when you need a lightweight, signed attestation of DNS or HTTPS domain control — particularly in agentic workflows where downstream tools, credential issuers, or trust systems require verifiable proof that a specific hostname is under a declared party's control. Prefer it over manual DNS lookups when you need a tamper-evident, machine-readable evidence record rather than a raw DNS response.

## Known failure modes

- DNS TXT record not found or does not match expected value — returns verification failure
- HTTPS well-known challenge file missing or unreachable — returns HTTPS proof failure
- Domain does not resolve — returns DNS resolution error
- Declared proof method not supported — returns unsupported method error
- Proof expired or stale — returns staleness or expiry error
- Malformed domain input — returns validation error

## How this service works

Attest declared DNS and HTTPS domain-control proof status

## Output

A signed attestation record confirming the declared DNS and HTTPS domain-control proof status for the submitted domain, indicating whether control was successfully verified and binding the result as evidence that can be referenced in downstream trust workflows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-ownership-evidence-a09304d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)