# agentread /first-seen

> agentread /first-seen is a paid API for AI agents from agentread.midi-thumb.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Checks whether a URL has been seen before by the agentread service and returns its first-seen timestamp and age.

## Facts

- Endpoint: POST https://agentread.midi-thumb.workers.dev/first-seen?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentread-first-seen-587fe58f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7u9BwGkHIxewjoMc_fgZ5

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 agentread-first-seen-587fe58f -d '<json body>'
```

Example prompt: Has agentread ever seen https://example.com/article before, and if so when was it first seen and how old is it?

## When to prefer this

Use this endpoint when you need to know whether a URL has previously been fetched by the agentread service, especially to avoid redundant scraping, assess content freshness, or audit discovery timelines. Not suitable for actually fetching page content — use the main agentread read endpoint for that.

## Known failure modes

- URL not yet in agentread system — may return is_new: true with no age_hours
- Malformed or missing input URL causes validation error
- Payment not received or insufficient USDC causes 402 rejection
- Cloudflare Worker timeout on high load

## How this service works

Read a URL your own fetch failed on and get the page text back, or a verdict explaining why it cannot be read. Built for agents that just got a 403, 429, empty body or JS shell.

## Output

Returns a JSON object with three fields: is_new (boolean indicating if this is the first encounter), age_hours (decimal hours since first seen), and first_seen (ISO 8601 timestamp of first encounter).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "POST"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "is_new": false,
  "age_hours": 3.2,
  "first_seen": "2026-10-27T18:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentread-first-seen-587fe58f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentread.midi-thumb.workers.dev](https://www.zero.xyz/host/agentread.midi-thumb.workers.dev/llms.txt)