# has-linear-domain-verification

> has-linear-domain-verification is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Checks whether a domain's apex TXT records contain a Linear ownership verification token, using Cloudflare DNS-over-HTTPS.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/verification/linear?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/has-linear-domain-verification-532ab2cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y3o5OV7NIxWF5W0AyWpFX

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 has-linear-domain-verification-532ab2cb
```

Example prompt: Can you check whether acme.com has a Linear domain verification token in its DNS records — I want to know if they're a Linear customer?

## When to prefer this

Use this endpoint when you need to determine whether a specific company/domain is a Linear customer or has claimed their domain in Linear, based solely on DNS TXT record inspection. Prefer this over manual DNS lookups or broader SaaS-detection tools when the specific signal needed is the Linear ownership token. Best for sales intelligence, tech-stack research, or integration compatibility checks.

## Known failure modes

- Domain does not exist or has no TXT records — returns absence/not-found
- Cloudflare DoH unreachable — lookup fails with network/upstream error
- Invalid domain format supplied — bad request error
- Domain has TXT records but no Linear token — returns 'not verified' result
- Rate limiting or payment failure — 402 or quota error

## How this service works

Does the domain carry a linear domain-verification TXT record? Reads the apex TXT records (Cloudflare DoH) and reports whether the linear ownership token is present and the token value (truncated). A present token usually means the company uses linear's product; absence means not verified there. $0.01 per lookup.

## Output

Returns whether the Linear domain-verification TXT token is present at the apex of the queried domain, along with the truncated token value if found, and absence information if not. Sourced via Cloudflare DNS-over-HTTPS.

## 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/has-linear-domain-verification-532ab2cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)