# Tomba Email Format Lookup

> Tomba Email Format Lookup is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the email address format patterns (e.g. first.last, firstlast) used by a given company domain.

## Facts

- Endpoint: GET https://x402.orthogonal.com/tomba/v1/email-format
- 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/tomba-email-format-lookup-20cdd18a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-MeqGEA57i_iJTOycLJfN

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 tomba-email-format-lookup-20cdd18a
```

Example prompt: What email format does stripe.com use for their employees — is it first.last, firstlast, or something else?

## When to prefer this

Use this endpoint when you need to discover the email naming convention for a domain before constructing or guessing an individual's email address. Prefer this over a full email finder when you don't yet know the person's name or want to understand the pattern for bulk outreach. It's especially useful as a precursor step to the find-email endpoint.

## Known failure modes

- Domain not found or no email pattern data available — returns empty or null result
- Invalid domain format causes a 400 bad request error
- Unknown or very small company domains may have no indexed email pattern data
- Rate limiting or payment failure results in 402 or 429 response

## How this service works

Get the email format patterns used by a domain (e.g. first.last, firstlast).

## Output

Returns the email format patterns in use at the specified domain, such as 'first.last', 'firstlast', 'first', or 'flast', along with confidence or usage frequency data where available.

## 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": {
      "domain": {
       "type": "string",
       "description": "Domain name, e.g. stripe.com"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tomba-email-format-lookup-20cdd18a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)