# OnchainIntel Probe - Premium Endpoint Verification with Attestation

> OnchainIntel Probe - Premium Endpoint Verification with Attestation is a paid API for AI agents from probe.onchainintel.net, paid per call via x402, $1/call, status unknown (last checked 2026-09-15).

Performs premium HTTP endpoint verification with full cryptographic attestation, confirming reachability, correctness, and health of a target endpoint

## Facts

- Endpoint: POST https://probe.onchainintel.net/api/verify
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/probe-onchainintel-net-d74d366b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CbNF4eTeSZNl5_XrxNy4p

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-d74d366b -d '<json body>'
```

Example prompt: Can you do a full premium probe and attestation check on my POST endpoint at https://api.myservice.com/submit, sending a JSON body like {"test":true}, and give me the complete verification result?

## When to prefer this

Choose this endpoint when you need not just a basic health ping but a full attested verification — i.e., cryptographic proof that an HTTP endpoint is live and responding correctly. Prefer it over lightweight ping alternatives when compliance, audit trails, or onchain attestation of endpoint status is required.

## Known failure modes

- Target endpoint unreachable or times out — returns error with connection failure details
- Invalid or missing required input fields (type, method, bodyType, body) — returns 400-class validation error
- Payment of 1 USDC not fulfilled — returns 402 Payment Required
- Target endpoint returns unexpected status code — attestation may reflect failure state
- Malformed JSON body — returns schema validation error

## How this service works

Premium endpoint verification with full attestation

## Output

Returns a verification object containing the health status, reachability result, and full attestation of the probed HTTP endpoint, confirming whether it responded correctly to the given request

## Example request

```json
{
 "input": {
  "body": {
   "test": true,
   "message": "health check"
  },
  "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-d74d366b/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)