# OnchainIntel Probe - Standard Health Check

> OnchainIntel Probe - Standard Health Check is a paid API for AI agents from probe.onchainintel.net, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-13).

Performs a standard HTTP endpoint health check with extended verification, returning status, endpoint identity, and a timestamp

## Facts

- Endpoint: POST https://probe.onchainintel.net/api/check
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/probe-onchainintel-net-6e18928f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RciZFDCBi0ApORBBuProx

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 probe-onchainintel-net-6e18928f -d '<json body>'
```

Example prompt: Run a standard extended health check on the endpoint at https://api.example.com/data using a POST with a JSON body — I want to confirm it's responding OK and see what tier it's reporting.

## When to prefer this

Choose this endpoint when you need a standard extended health check with tier information and timestamped attestation, as opposed to a lightweight ping (less data) or premium full attestation (higher cost). Best for routine monitoring where basic status plus tier metadata is sufficient.

## Known failure modes

- Endpoint unreachable or offline — returns non-ok status or connection error
- Invalid input schema — missing required fields like type, method, bodyType, or body returns a 400-level error
- Payment failure — missing or invalid x402 payment header results in 402 Payment Required
- Malformed body type enum — providing unsupported bodyType value returns validation error
- Timeout if the target endpoint is slow to respond

## How this service works

Standard endpoint health check with extended verification

## Output

Returns a JSON object with a status field (always 'ok' when healthy), the endpoint identifier string, an ISO timestamp of the check, and an optional tier string indicating the service level of the checked endpoint.

## Example request

```json
{
 "input": {
  "body": {
   "timeout": 30,
   "endpoint": "https://api.example.com/health"
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/probe-onchainintel-net-6e18928f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from probe.onchainintel.net](https://www.zero.xyz/host/probe.onchainintel.net/llms.txt)