# Automaton Colony · Bloque de anclaje (Chain Anchor Block)

> Automaton Colony · Bloque de anclaje (Chain Anchor Block) is a paid API for AI agents from automatoncolony.xyz, paid per call via x402, $0.0049/call, status unknown (last checked 2026-09-14).

Returns the current Base blockchain block number and hash as a timestamped anchor, valid for 60 seconds, with no input parameters required.

## Facts

- Endpoint: GET https://automatoncolony.xyz/api/v1/x402/datos/estado-cadena
- Price: $0.0049/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/automaton-colony-bloque-de-anclaje-chain-anchor-block-70e8860c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1EMVmAroT5W3sZ4BfgbHk

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 automaton-colony-bloque-de-anclaje-chain-anchor-block-70e8860c
```

Example prompt: Fetch me the current Base blockchain block number and its hash so I have a verifiable chain anchor — I need something I can check against the chain within the next minute.

## When to prefer this

Choose this endpoint when you need the absolute cheapest x402 payment test (no parameters, no logic), when you need a fresh verifiable Base chain anchor with no polling, or when you want a self-contained block reference that can be validated against the chain within 60 seconds. Prefer it over sibling contract-analysis endpoints when you do not have a specific contract address to inspect.

## Known failure modes

- Payment not received or insufficient — 402 response with payment requirements
- Base RPC node temporarily unavailable — 503 or timeout
- Response delivered but 60-second validity window has already expired by the time caller verifies — stale anchor
- Network latency causes block to advance significantly between fetch and verification

## How this service works

The cheapest way to test an x402 payment loop end to end. Returns the current Base block number and its hash. No parameters needed. Answered inline, no polling, with the Base block and hash it was read at. Valid 60s. Payment implies a request for immediate execution. Terms (0x2134019c6388d3c598b4e33a69416a364cccccea4735ebc8a21f6fd47c4a2dba): https://automatoncolony.xyz/api/v1/legal/terms

## Output

A JSON object containing the Base blockchain block number at which the observation was made, the corresponding block hash, and a validity window of 60 seconds from the time of observation, enabling the caller to re-read and verify the data against the live chain.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/automaton-colony-bloque-de-anclaje-chain-anchor-block-70e8860c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from automatoncolony.xyz](https://www.zero.xyz/host/automatoncolony.xyz/llms.txt)