# TD Agent Utility – Checkpoint Load (Website & Deployment Verification)

> TD Agent Utility – Checkpoint Load (Website & Deployment Verification) is a paid API for AI agents from tdagentutility.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).

Retrieves a previously stored verification checkpoint record for a website or deployment, returning cached HTTP, DNS, TLS, and screenshot evidence.

## Facts

- Endpoint: POST https://tdagentutility.co.uk/v1/checkpoint-load?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/td-agent-utility-checkpoint-load-website-deployment-verification-66076342
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sl_vTgpNmO-NBMwNWgVZ7

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 td-agent-utility-checkpoint-load-website-deployment-verification-66076342 -d '<json body>'
```

Example prompt: Load the existing verification checkpoint for my deployment at example.com — I need to see whether the HTTP, DNS, and TLS checks previously passed and if there are any warnings.

## When to prefer this

Use this endpoint when you need to retrieve a previously stored verification result rather than trigger a fresh check — ideal for auditing, compliance reporting, or confirming a known-good state without incurring the cost of a new HTTP/DNS/TLS/screenshot run. Prefer this over a live verification endpoint when the goal is to load cached evidence quickly.

## Known failure modes

- Checkpoint not found: 'found' is false and 'record' is null — the checkpoint ID or domain does not match any stored record
- Expired or stale checkpoint: record exists but 'checked_at' timestamp is old, warnings may indicate staleness
- Invalid input: missing or malformed checkpoint identifier causes a 400-class error
- Service unavailable: upstream verification store is unreachable, resulting in a 5xx error

## How this service works

Independent website and deployment verification for AI agents: HTTP, DNS, TLS and Chromium screenshot evidence. Three deterministic tools, x402 V2 Base USDC.

## Output

Returns a JSON object containing the tool name ('checkpoint_load'), a boolean indicating whether the checkpoint was found, the full checkpoint record (or null if not found), an array of warnings, the timestamp of when the check was performed, and a result_status string (e.g. 'PASS').

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tool": "checkpoint_load",
  "found": false,
  "record": null,
  "warnings": [],
  "checked_at": "2026-10-15T00:00:00Z",
  "result_status": "PASS"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/td-agent-utility-checkpoint-load-website-deployment-verification-66076342/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tdagentutility.co.uk](https://www.zero.xyz/host/tdagentutility.co.uk/llms.txt)