# certificate-history

> certificate-history is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Retrieves full certificate-transparency log history for a domain, grouped by issuer with first/last issuance dates, valid-cert counts, and the 20 most recent certificate entries.

## Facts

- Endpoint: GET https://intel.rallylive.ca/monitor/cert-history
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/certificate-history-a52239ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FnIa2kjNPRHMnliv2XJW0

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 certificate-history-a52239ae
```

Example prompt: Pull the full certificate-transparency issuance history for example.com — I want to see every CA that's ever issued a cert for it, the first and last issuance dates per issuer, how many are currently valid, and the 20 most recent certificate entries.

## When to prefer this

Choose this endpoint when you need historical certificate issuance intelligence across all CAs for a domain — especially for security audits, detecting rogue issuers, analyzing renewal patterns, or tracking CA changes over time. Prefer this over a simple SSL expiry check (which only shows the current cert) when historical breadth and issuer diversity matter. Ideal for threat-hunting, compliance audits, and domain monitoring workflows.

## Known failure modes

- Domain not found or no CT log entries exist — returns empty result set
- Invalid or malformed domain input — returns validation error
- CT log query timeout — may return partial results
- No currently valid certificates — current-valid count returns zero
- Rate limiting or payment failure — returns 402 or 429 error

## How this service works

Certificate issuance history from certificate-transparency logs: every certificate ever logged for the domain (up to 200), grouped by issuer with first/last issuance dates, current-valid count, and the most recent 20 entries (issuer, common name, not-before/not-after). Spot rogue issuers, renewal cadence and CA changes. $0.01 per domain.

## Output

Returns up to 200 historical certificate entries for the domain, grouped by issuer with first/last issuance timestamps and a count of currently valid certificates, plus the 20 most recent entries showing issuer, common name, and not-before/not-after validity dates.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "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/certificate-history-a52239ae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)